Underground diaphragm wall underwater concrete elevation real-time monitoring system and use method thereof

Abstract

The invention discloses an underground diaphragm wall underwater concrete elevation real-time monitoring system and a use method thereof. The system comprises a monitoring device, a data analysis module and a data monitoring and early warning module, the monitoring device adopts one or more single devices; the data analysis comprises an elevation calculation formula, a depth calculation formula and a height difference calculation formula; the data monitoring and early warning comprises underwater concrete elevation real-time monitoring and intelligent early warning; and finally, the real-time monitoring system for the underwater concrete elevation of the underground diaphragm wall is formed. Compared with traditional manual measurement, the device can monitor the elevation change in the whole construction process of the underground diaphragm wall and transmit data to a monitoring system, and a curve graph is obtained through automatic analysis; intelligent early warning can be carried out; according to the technology, construction safety measurement data are more accurate, and standardization can be achieved; turnover is easy, and no pollution is caused.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater concrete construction monitoring, and particularly relates to a real-time monitoring system for underwater concrete elevation of underground continuous wall and a use method thereof. BACKGROUND

[0002] With the vigorous development of infrastructure construction in China, more and more high-rise buildings, large bridges and highways are being built, and the application of pile foundation, underground continuous wall and other structures is essential in these engineering constructions. Especially in the construction of subway engineering, underground continuous wall as an important enclosure structure, its construction quality is directly related to the safety and stability of subway engineering. With the rapid development of subway construction, the construction requirements for underground continuous wall are becoming higher and higher. In the pouring process of underground continuous wall, accurate control of pouring elevation is of great importance. Insufficient concrete pouring height will affect the quality of underground continuous wall, and excessive concrete pouring height will waste materials and increase construction cost.

[0003] The traditional underground continuous wall pouring elevation monitoring method mainly relies on manual measurement, which has many disadvantages. On the one hand, the accuracy of manual measurement is limited and easily affected by human factors such as experience and technical level of the measurement personnel, resulting in inaccurate measurement results. Moreover, in complex construction site environment, the safety of measurement personnel is difficult to be fully guaranteed. On the other hand, manual measurement is low in efficiency and cannot realize real-time monitoring, making it difficult to find problems in the pouring process in time and make adjustments. Therefore, some units have developed and applied the technology of underwater concrete elevation measurement, for example, Chinese patent: A device and method for measuring the elevation of underwater concrete, application number: 202110585905.X, application date: May 27, 2021, abstract: The present application discloses a device and method for measuring the elevation of underwater concrete, comprising a first hollow steel pipe, the shape of the bottom end outer wall of the first hollow steel pipe is set as a tapered shape, the top end outer wall of the first hollow steel pipe is threaded with a connecting ring, the inner wall of the connecting ring is threaded with an extension hollow steel pipe, the outer walls of the extension hollow steel pipe and the first hollow steel pipe are respectively provided with a first monitoring air bag and a second monitoring air bag, a blind pipe is arranged between the first monitoring air bag and the second monitoring air bag, and a connecting mechanism is arranged on the inner wall of the connecting ring. When measuring the elevation of underwater concrete, the whole device is placed at the bottom of the hole through the stabilizing mechanism, the height from the bottom of the hole to the water surface is measured as H, then it is left for a period of time, when the pressure in the first monitoring air bag and the second monitoring air bag is stable, the pressure in the first monitoring air bag is detected through the pressure detection mechanism.

[0004] The application research shows that if the above-mentioned technology for measuring the elevation of underwater concrete wants to accurately calculate the elevation of the concrete, multiple sensors need to be arranged, which not only greatly increases the construction cost, but also makes the installation and debugging process extremely complex and tedious; when the depth of the underground continuous wall is large, the device is difficult to pull out of the concrete, increasing the construction risk and cost; the device cannot realize real-time and continuous monitoring of the elevation of underwater concrete, cannot simultaneously display the underwater concrete elevations of multiple measuring points, cannot provide intelligent prompt and warning, cannot judge whether the elevations of multiple underwater concrete pouring points are too large, and cannot guarantee the balanced pouring of underwater concrete. Therefore, a real-time monitoring technology for the elevation of underwater concrete of underground continuous walls needs to be developed. SUMMARY

[0005] The purpose of the present application is to solve the problems existing in the prior art, provide a real-time monitoring system for the elevation of underwater concrete of underground continuous walls and a use method thereof, which can monitor the elevation of underwater concrete of underground continuous walls in real time, simultaneously display the underwater concrete elevations of multiple measuring points in real time through the arrangement of multiple single devices, observe and judge the elevation changes during concrete pouring through the maximum height difference and curve diagram of multiple measuring points, and adjust the concrete pouring speed of different pouring points when the height difference is greater than the specification threshold, so as to guarantee the balanced pouring of concrete.

[0006] The present application is implemented by using the following technical solutions: A real-time monitoring system for the elevation of underwater concrete of underground continuous walls, comprising a monitoring device, a data analysis module and a data monitoring and warning module; the monitoring device adopts one or more single devices; the single device comprises a base rod for being clamped on the concrete of the guide wall on both sides and a pulley block, a device rack is vertically fixedly installed at the middle position of the base rod, a pull rope displacement sensor and a guide pulley are installed at the upper end of the device rack, the pulley block comprises a multi-groove movable pulley and a multi-groove fixed pulley, a mounting bracket of the multi-groove fixed pulley is fixedly installed at the lower end of the device rack, the multi-groove movable pulley is located directly above the multi-groove fixed pulley, a sensor pull rope of the pull rope displacement sensor is connected with the mounting bracket of the multi-groove movable pulley, the mounting bracket of the multi-groove movable pulley is further connected with a counterweight lifting rope, one end of the counterweight lifting rope is connected with the mounting bracket of the multi-groove movable pulley, the other end of the counterweight lifting rope is connected with a counterweight after passing through the guide pulley, a floating buoy lifting rope is wound on the multi-groove movable pulley and the multi-groove fixed pulley for multiple times, the upper end of the floating buoy lifting rope is fixedly connected with the multi-groove movable pulley, and the lower end of the floating buoy lifting rope is vertically connected with a floating buoy.

[0007] Further preferably, the base rod comprises two parallel arranged horizontal rods, the bottom of the base rod is connected with a support rod for limiting and supporting the concrete vertical face of the guide wall, the two ends of the support rod are respectively threadedly connected with screw rods, the extension length is adjusted by rotating the screw rods, and the equipment frame can be stably supported on the concrete of the guide wall; the equipment frame comprises four vertical rods, two vertical rods are fixedly installed on each horizontal rod of the base rod, the four vertical rods are connected into a whole through a fixing rod, a rain shed is installed at the top of the four vertical rods, a bearing plate is fixedly connected between the upper ends of the four vertical rods, a pull rope displacement sensor and a guide pulley are fixed on the bearing plate through bolts.

[0008] Further preferably, the bottom of the support rod is provided with a walking wheel, and the equipment frame can be pushed to walk when not working.

[0009] Further preferably, an industrial computer is installed on the equipment frame, the industrial computer is provided with a loudspeaker, the loudspeaker can broadcast intelligent early warning information, the industrial computer is matched and connected with the pull rope displacement sensor in signal, the industrial computer is provided with a wireless transmission module, and the wireless transmission module transmits real-time data measured by the pull rope displacement sensor to a cloud space; the data analysis module comprises an elevation calculation formula H n =H0-kx n , a depth calculation formula h n =kx n , and a height difference calculation formula ΔH=H max -H min ; in the elevation calculation formula H n =H0-kx n , n represents a monitoring point serial number, and the real-time elevation of the underwater concrete of the monitoring point is recorded as H n ; H0 represents the elevation of the guide wall; k represents the rope length amplification multiple of the mixing wheel group; and x represents the real-time reading of the pull rope displacement sensor; in the depth calculation formula h n =kx n , n represents a monitoring point serial number, and the depth from the underwater concrete liquid surface of the monitoring point to the elevation of the guide wall is recorded as h n ; k represents the rope length amplification multiple of the mixing wheel group; and x represents the real-time reading of the pull rope displacement sensor; in the height difference calculation formula ΔH=H max -H min , H max represents the maximum value of the real-time elevations of the plurality of monitoring points; and H minThe minimum value of the real-time elevation of the plurality of monitoring points is represented, and ΔH represents the height difference between the maximum value and the minimum value of the real-time elevation of the plurality of monitoring points; the data monitoring and early warning module comprises underwater concrete elevation real-time monitoring, underwater concrete liquid surface maximum height difference overrun prompt early warning, underwater concrete pouring interval time length overrun prompt early warning, underwater concrete real-time monitoring elevation and back-pushed elevation of the poured underwater concrete height difference overrun early warning, guide pipe depth overrun prompt early warning, intelligent grading prompt early warning of the underwater concrete liquid surface elevation before reaching the target elevation; the data obtained by the monitoring device is subjected to data analysis and then data monitoring and early warning; the system can download data in cloud space and automatically analyze the data to form a corresponding curve.

[0010] Further preferably, the underwater concrete liquid surface maximum height difference overrun prompt early warning means that when the maximum height difference of the underwater concrete liquid surface elevation of the plurality of monitoring points is greater than the specification threshold value, the intelligent prompt is that the current concrete pouring relative height is uneven.

[0011] Further preferably, the underwater concrete pouring interval time length overrun prompt early warning means that when the underwater concrete pouring interval time length exceeds the specification threshold value, the intelligent prompt is that the underwater concrete pouring interval time length is too long.

[0012] Further preferably, the underwater concrete real-time monitoring elevation and back-pushed elevation of the poured underwater concrete height difference overrun early warning means that when the height difference between the underwater concrete real-time monitoring elevation and the back-pushed elevation of the poured underwater concrete exceeds the set value, the intelligent prompt is that the underground continuous wall may have a hole collapse phenomenon.

[0013] Further preferably, the guide pipe depth overrun prompt early warning means that when the concrete pouring guide pipe depth is greater than the specification threshold value, the intelligent prompt is to remove a section of the guide pipe.

[0014] Further preferably, the underwater concrete liquid surface elevation before reaching the target elevation multi-point intelligent grading prompt early warning corresponds to the setting of a plurality of target difference values, when the underwater concrete liquid surface elevation is less than the set difference value from the target elevation, the intelligent prompt is the current underwater concrete liquid surface elevation difference from the target elevation, and when the difference value is 0, the intelligent prompt is that the underwater concrete pouring is completed.

[0015] The use steps of the underground continuous wall underwater concrete elevation real-time monitoring system are as follows: Step one, monitoring device deployment: initially purchase a rope displacement sensor; according to the depth of the underground continuous wall, the mud density, the underwater concrete density and other working conditions, the density of the float, the weight of the counterweight, the number of pulley sets and other contents are deployed. When the density of the float is deployed, it should satisfy G 浮漂实际 -F 配重等效 =ρ 浮漂等效 ×V 浮漂The conditions must be met to ensure that the float rises with the underwater concrete level; when adjusting the weight of the counterweight, the following conditions must be met: 配重 -G 滑轮 -f 滑轮阻力 =F 配重等效 The condition of ×K, where G 浮漂实际 F is the actual weight of the float. 配重等效 ρ is the equivalent pulling force exerted on the float by the counterweight after being multiplied by the pulley system. 浮漂等效 For the float to be affected by F 配重等效 The equivalent density after action, V 浮漂 G is the volume of the float. 配重 For the weight of the counterweight, G 滑轮 For the weight of the multi-groove movable pulley, f 滑轮阻力 The frictional resistance of the pulley system is K, which is the magnification factor of the rope length in the pulley system, and ρ is the frictional resistance of the pulley system. 浮漂等效 According to ρ 泥浆 <ρ 浮漂 <ρ 砼 Based on the working conditions of the density of underwater concrete and mud on site, V was determined. 浮漂 According to the displacement method, G can be obtained. 浮漂实际 The result is obtained by measuring with a force gauge, therefore it can be calculated according to the formula G. 浮漂实际 -F 配重等效 =ρ 浮漂等效 ×V 浮漂 F is derived 配重等效 G 滑轮 f 滑轮阻力 F was calculated using a force gauge. 配重等效 According to formula G 浮漂实际 -F 配重等效 =ρ 浮漂等效 ×V 浮漂 Therefore, K is the magnification factor of the rope length of the pulley system, and thus, according to the formula G... 配重 -G 滑轮 -f 滑轮阻力 =F 配重等效 ×K yields G 配重 To ensure the float remains taut during ascent, the number of pulley groups should be adjusted based on the maximum travel of the rope displacement sensor within the monitoring device and the trenching depth of the diaphragm wall. z1 represents the trenching depth of the diaphragm wall, and z2 represents the maximum travel of the rope displacement sensor within the monitoring device. Therefore, the number of pulley groups z must be greater than z1 / z2.

[0016] Step two, monitoring device layout: after the device is assembled, move the device to the target location of the wall connecting position; the device layout principle is to avoid the concrete pouring point and the steel bar dense part in the empty position and place one or more single devices uniformly to ensure that the float can be smoothly lowered to the bottom of the underground continuous wall; the tension displacement sensor of the multiple single devices is integrated on the industrial computer through the connecting line, and the underwater concrete liquid level of multiple measuring points is monitored in real time on the industrial computer.

[0017] Step three, parameter setting and data initialization: after the float is flush with the guide wall top elevation, the parameters are set and the data is initialized; the set parameters include the underground continuous wall number and the depth of the underground continuous wall; the data to be initialized includes the guide wall elevation H0 and the pulley rope length amplification multiple k.

[0018] Step four, real-time monitoring application: before the underwater concrete pouring after the underground continuous wall is grooved, the float is lowered to the bottom of the underground continuous wall groove, and then multiple underwater concrete pouring points are poured at the same time; because the density of the float is greater than the density of the mud and less than the density of the concrete, the float of the monitoring device will stay on the underwater concrete liquid surface and rise with the rise of the underwater concrete liquid surface; the data of the displacement of the float is scaled by the pulley set and transmitted to the tension rope displacement sensor, the tension rope displacement sensor uploads the measured data to the monitoring system, and after data analysis, the underwater concrete elevation is monitored in real time.

[0019] Step five, balanced control during pouring: when the maximum difference of the underwater concrete liquid level elevation of multiple measuring points is greater than the specification threshold, adjust the pouring speed of different underwater concrete pouring points to ensure balanced pouring of the concrete; during the pouring of the underwater concrete, the elevation is inversely calculated according to the amount of the poured underwater concrete, and compared with the real-time monitored elevation, when the difference is too large, it is judged as a hole collapse.

[0020] Step six, intelligent early warning: when the maximum difference of the underwater concrete liquid level elevation of multiple measuring points is greater than the specification threshold, the intelligent prompt is given that the current concrete pouring relative height is not uniform; when the underwater concrete pouring interval time exceeds the specification threshold, the intelligent prompt is given that the underwater concrete pouring interval time is too long; when the difference between the real-time monitored elevation of the underwater concrete and the inversely calculated elevation of the poured underwater concrete exceeds the set value, the intelligent prompt is given that the underground continuous wall has a hole collapse phenomenon; when the concrete pouring guide pipe buried depth is greater than the specification threshold, the intelligent prompt is given to remove a section of the guide pipe; the multiple measuring points are intelligently graded to prompt early warning before the underwater concrete liquid level reaches the target elevation, multiple target differences are set in advance, when the underwater concrete liquid level is less than the set difference from the target elevation, the intelligent prompt is given that the current underwater concrete liquid level is different from the target elevation, and when the difference is 0, the intelligent prompt is given that the underwater concrete pouring is completed.

[0021] Step seven, when the real-time elevation of the multi-point underwater concrete has exceeded the target elevation, the real-time monitoring of the underground continuous wall underwater concrete pouring is completed. After the monitoring is completed, the counterweights, floats, pulley blocks, displacement sensors, guide pulleys, industrial personal computers, and equipment racks are removed in turn; the removed parts are transported to the next construction site for use or returned to the material storage warehouse for maintenance and storage.

[0022] The technical solution of the present application employs a floating body of the monitoring system which can continuously rise with the liquid surface of the underwater concrete to real-time detect the elevation of the underground continuous wall during pouring; by setting multiple single devices, the elevations of the underwater concrete at multiple measuring points can be displayed simultaneously and in real time; intelligent early warning can be realized, including intelligent early warning for removal of the guide pipe and hierarchical intelligent early warning for multiple measuring points; the elevation of the underground continuous wall can be continuously detected by calculating the displacement change of the displacement sensor, and the wireless transmission module transmits the collected data to the cloud platform, and the monitoring system downloads the data on the cloud platform and forms the corresponding curve graph; by observing the elevation difference and the curve graph of the multiple measuring points, the concrete pouring speed can be adjusted in real time when abnormal conditions occur to ensure balanced concrete pouring. During use, intelligent early warning is realized through system data processing, including intelligent early warning for removal of the guide pipe: when the concrete pouring guide pipe is buried deeper than the specification threshold, the guide pipe can be removed intelligently; hierarchical intelligent early warning for multiple measuring points: multiple target differences can be set in advance, and when the concrete elevation is less than the set difference from the target elevation, intelligent warning can be given; when the difference is 0, the concrete pouring is completed. Compared with traditional manual measurement of the underwater concrete elevation, the present application reduces the labor cost and consumption, is more time-saving and labor-saving, and is safer; the elevation change of the underground continuous wall of the metro station enclosure structure during the entire construction process can be monitored, and the collected data can be transmitted to the monitoring system for automatic analysis to obtain the corresponding curve graph; the construction safety measurement data is less prone to error and more accurate, and standardization can be achieved; the system is easy to turnover, reduces construction cost, and is pollution-free. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of the underground continuous wall underwater concrete elevation real-time monitoring system; Figure 2 FIG. 2 is a left view schematic diagram of the underground continuous wall underwater concrete elevation real-time monitoring system; Figure 1 Figure 3 FIG. 3 is a three-dimensional structural schematic diagram of the underground continuous wall underwater concrete elevation real-time monitoring system; The name corresponding to the serial number in the figure is: ​1, base bar, 2, connecting rod, 3, support rod, 4, pulley block, 5, guide wall concrete, 6, sensor pull rope, 7, counterweight lifting rope, 8, industrial computer, 9, pull rope displacement sensor, 10, canopy, 11, vertical rod, 12, guide pulley, 13, counterweight, 14, fixed rod, 15, multi-groove movable pulley, 16, multi-groove fixed pulley, 17, float lifting rope, 18, float, 19, walking wheel. DETAILED DESCRIPTION

[0024] The technical solutions in the application will be described clearly and completely in combination with the embodiments, and the described embodiments are only a part of the embodiments of the application, not all. EMBODIMENT

[0025] A kind of underground continuous wall underwater concrete elevation real-time monitoring system, the system includes three major modules, specifically monitoring device, data analysis, data monitoring and early warning;The monitoring device uses one and more single device;The single device includes the base bar 1 for being stuck on the guide wall concrete 5 on both sides and pulley block 4, equipment rack is vertically fixedly installed in the middle position of base bar 1, the upper end of equipment rack is installed with pull rope displacement sensor 9 and guide pulley 12, pulley block 4 includes multi-groove movable pulley 15 and multi-groove fixed pulley 16, the mounting bracket of multi-groove fixed pulley 16 is fixedly installed in the lower end of equipment rack, multi-groove movable pulley 15 is located directly above multi-groove fixed pulley 16, the mounting bracket of multi-groove movable pulley 15 is connected with sensor pull rope 6 of pull rope displacement sensor 9, the mounting bracket of multi-groove movable pulley 15 is also connected with counterweight lifting rope 7, one end of counterweight lifting rope 7 is connected with the mounting bracket of multi-groove movable pulley 15, the other end of counterweight lifting rope 7 is connected with counterweight 13 after passing through guide pulley 12, multi-groove movable pulley 15 and multi-groove fixed pulley 16 are wound with a float lifting rope 17, the upper end of float lifting rope 17 is fixedly connected with multi-groove movable pulley 15, the lower end of float lifting rope 17 is vertically connected with float 18.

[0026] The base bar 1 includes two parallel arranged cross bars, the bottom of base bar 1 is connected with support rod 3 for limiting support guide wall concrete 5 vertical surface by connecting rod 2, the both ends of support rod 3 are respectively threadedly connected with screw rod, the equipment rack is stably supported on guide wall concrete 1 by adjusting the extension length by rotating screw rod;The equipment rack includes four vertical rods 11, two vertical rods 11 are fixedly installed on each cross bar of base bar 1, four vertical rods 11 are connected as a whole by fixed rod 14, canopy 10 is installed and arranged on the top of four vertical rods 11, load-bearing plate is fixedly connected on the upper end between four vertical rods 11, pull rope displacement sensor 9 and guide pulley 12 are fixed on load-bearing plate by bolt.

[0027] The bottom of support rod 3 is installed with walking wheel 19, the equipment rack can be pushed to walk when not working.

[0028] The device frame is provided with an industrial computer 8, the industrial computer 8 is provided with a loudspeaker, the loudspeaker can broadcast intelligent early warning information, the industrial computer 8 is matched and connected with the pull rope displacement sensor 9 signal, the industrial computer 8 is provided with a wireless transmission module, the wireless transmission module transmits real-time data measured by the pull rope displacement sensor 9 to the cloud space; the data analysis module comprises an elevation calculation formula: H n =H0-kx n , a depth calculation formula: h n =kx n , and a height difference calculation formula: AH=H max -H min ; in the elevation calculation formula H n =H0-kx n , n represents a monitoring point serial number, and the real-time elevation of the underwater concrete of the monitoring point is denoted as H n ; H0 represents a guide wall elevation; k represents a rope length magnification multiple of the mixing wheel group; and x represents a real-time reading of the pull rope displacement sensor; in the depth calculation formula h n =kx n , n represents a monitoring point serial number, and the depth from the underwater concrete liquid surface to the guide wall elevation of the monitoring point is denoted as h n ; k represents a rope length magnification multiple of the mixing wheel group; and x represents a real-time reading of the pull rope displacement sensor; in the height difference calculation formula AH=H max -H min , H max represents a maximum value of the real-time elevations of the plurality of monitoring points; H min represents a minimum value of the real-time elevations of the plurality of monitoring points, and AH represents a height difference value of the maximum value and the minimum value of the real-time elevations of the plurality of monitoring points; the data monitoring and early warning module comprises underwater concrete elevation real-time monitoring, underwater concrete liquid surface maximum height difference overrun prompt early warning, underwater concrete pouring interval time length overtime prompt early warning, underwater concrete real-time monitoring elevation and back-pushed elevation of the poured underwater concrete height difference overrun early warning, guide pipe buried depth overrun prompt early warning, and intelligent grading prompt early warning before the underwater concrete liquid surface elevation reaches a target elevation; the data measured by the monitoring device is subjected to data analysis, data monitoring and early warning; the system can download data in the cloud space and automatically analyze the data to form a corresponding curve graph.

[0029] The underwater concrete liquid surface maximum height difference overrun prompt early warning indicates that when the maximum height difference of the underwater concrete liquid surface elevations of the plurality of monitoring points is greater than a specification threshold value 50 cm, the current concrete pouring relative height is intelligently prompted to be uneven.

[0030] The underwater concrete pouring interval time length overtime prompt early warning indicates that when the underwater concrete pouring interval time length is greater than a specification threshold value 30 min, the underwater concrete pouring interval time length is intelligently prompted to be too long.

[0031] The underwater concrete real-time monitoring elevation and the high difference exceeding the limit early warning of the poured underwater concrete back elevation indicate that the intelligent prompt of the underground continuous wall may exist the hole collapse phenomenon when the high difference between the underwater concrete real-time monitoring elevation and the poured underwater concrete back elevation exceeds the set value 0.5 m.

[0032] The guide pipe depth exceeding the limit prompt early warning indicates that the intelligent prompt of removing a guide pipe is given when the concrete pouring guide pipe depth is greater than the specification threshold 2.5 m.

[0033] The multiple measuring point intelligent grading prompt early warning of the underwater concrete liquid surface elevation before reaching the target elevation corresponds to setting multiple target difference values, and when the underwater concrete liquid surface elevation is less than the set difference value from the target elevation, the intelligent prompt of the current underwater concrete liquid surface elevation difference from the target elevation is given, and when the difference value is 0, the intelligent prompt of the completion of the underwater concrete pouring is given.

[0034] The use steps of the underground continuous wall underwater concrete elevation real-time monitoring system are as follows: Step one, monitoring device deployment: initially purchase a rope displacement sensor; according to the depth of the underground continuous wall, the mud density, the underwater concrete density and other working conditions, the density of the float, the weight of the counterweight block, the number of the pulley set and other contents are deployed. When the density of the float is deployed, the condition of G 浮漂实际 -F 配重等效 =ρ 浮漂等效 ×V 浮漂 is met to ensure that the float can rise with the rising of the underwater concrete liquid surface; when the weight of the counterweight block is deployed, the condition of G 配重 -G 滑轮 -f 滑轮阻力 =F 配重等效 ×K is met, wherein, G 浮漂实际 is the actual gravity of the float, F 配重等效 is the equivalent tension of the counterweight block on the float after the conversion of the pulley set multiple, ρ 浮漂等效 is the equivalent density of the float under the action of F 配重等效 , V 浮漂 is the volume of the float, G 配重 is the gravity of the counterweight block, G 滑轮 is the gravity of the multi-groove movable pulley, f 滑轮阻力 is the friction resistance of the pulley set, and K is the rope length magnification multiple of the pulley set. ρ 浮漂等效 may be obtained according to ρ 泥浆 < ρ 浮漂 < ρ 砼 , and V 浮漂 may be obtained according to the working conditions of the density of the underwater concrete and the mud density on site, and G 浮漂实际 is obtained by measuring and calculating with the force gauge, so G 浮漂实际 -F配重等效 = p 浮漂等效 x V 浮漂 F is obtained 配重等效 ; G 滑轮 , f 滑轮阻力 F is obtained by force gauge measurement 配重等效 F is obtained according to formula G 浮漂实际 -F 配重等效 = p 浮漂等效 x V 浮漂 K is the rope length magnification of the pulley block, so G 配重 -G 滑轮 -f 滑轮阻力 =F 配重等效 x K is obtained 配重 Ensure that the fine steel wire rope can keep straight during the rising process of the float; when adjusting the number of pulley blocks, the maximum stroke that can occur in the monitoring device of the pull rope displacement sensor and the trenching depth of the underground continuous wall are adjusted, z1 represents the trenching depth of the underground continuous wall, and z2 represents the maximum stroke that can occur in the monitoring device of the pull rope displacement sensor, so the number of pulley blocks z needs to be greater than z1 / z2.

[0035] Step two, monitoring device layout: after the device is assembled, the device is moved to the target position of the continuous wall; the device layout principle is to place one or more single devices in the empty position away from the concrete pouring point and the steel bar dense part and uniformly spaced, to ensure that the float can be smoothly lowered to the bottom of the underground continuous wall; the pull force displacement sensors of the multiple single devices are integrated on the industrial personal computer through the connecting line, and the underwater concrete liquid level elevation of multiple measuring points is monitored in real time on the industrial personal computer; Step three, parameter setting and data initialization: after the float is leveled with the top elevation of the guide wall, the parameter setting and data initialization are performed; the set parameters include the underground continuous wall number and the depth of the continuous wall; the data to be initialized include the guide wall elevation H0 and the rope length magnification k of the pulley block.

[0036] Step four, real-time monitoring application: after the underground continuous wall is formed, before the underwater concrete pouring, the float is lowered to the bottom of the underground continuous wall groove, and then multiple underwater concrete pouring points are poured at the same time; since the density of the float is greater than the density of the mud and less than the density of the concrete, the float of the monitoring device will stay on the underwater concrete liquid surface and rise with the rise of the underwater concrete liquid surface; the data of the displacement of the float is scaled by the pulley block and transmitted to the pull rope displacement sensor, the pull rope displacement sensor uploads the measured data to the monitoring system, and after data analysis, the underwater concrete elevation is monitored in real time.

[0037] Step five, balance control during pouring process: when the maximum difference of underwater concrete liquid level elevation of multiple measuring points is greater than the specification threshold, adjust the pouring speed of different underwater concrete pouring points to ensure balanced pouring of concrete; during the pouring process of underwater concrete, the elevation is back calculated according to the amount of poured underwater concrete, and compared with the real-time monitored elevation, when the difference is too large, it is judged as a collapsed hole.

[0038] Step six, intelligent early warning: when the maximum difference of underwater concrete liquid level elevation of multiple measuring points is greater than the specification threshold, intelligently prompt that the current concrete pouring relative height is not uniform; when the underwater concrete pouring interval time exceeds the specification threshold, intelligently prompt that the underwater concrete pouring interval time is too long; when the difference between the real-time monitored elevation of underwater concrete and the back calculated elevation of the poured underwater concrete exceeds the set value, intelligently prompt that there is a collapsed hole in the underground continuous wall; when the concrete pouring guide pipe depth is greater than the specification threshold, intelligently prompt to remove a section of guide pipe; the multiple measuring points are intelligently classified and prompted for early warning before the underwater concrete liquid level elevation reaches the target elevation, multiple target differences are set in advance, when the underwater concrete liquid level elevation is less than the set difference from the target elevation, intelligently prompt the current underwater concrete liquid level elevation difference from the target elevation, and when the difference is 0, intelligently prompt that the underwater concrete pouring is completed.

[0039] Step seven, when the real-time elevations of multiple measuring points of underwater concrete have all exceeded the target elevation, the real-time monitoring of underwater concrete pouring of the underground continuous wall is completed.

[0040] Implementation case: The length of a certain underground continuous wall is 6m, the width is 0.8m, the top elevation is 71.95m, the bottom elevation is 54.88m, the depth is 17.07m, the guide wall elevation is 74m, and the slotting depth is 19.12m. The use steps of the underwater concrete elevation real-time monitoring system of the underground continuous wall are as follows: (1) Monitoring device deployment: purchase a 2m long rope displacement sensor with a return rope tension of 4N; according to the depth of a certain underground continuous wall of 17.07m, the mud density of 1.1g / cm3, and the underwater concrete density of 2.2g / cm3, deploy the density of the float, the weight of the counterweight, the number of pulley sets, etc.; when deploying the density of the float, the density of the float is set to 1.5g / cm3, a cylindrical float with a diameter of 8cm and a height of 9cm is purchased, and the volume of the float is 452cm 3 Therefore, the weight of the float is 0.68kg, which meets the condition of G 浮漂实际 -F 配重等效 =ρ 浮漂等效 ×V 浮漂 , ensuring that the float can rise with the rising of the underwater concrete liquid surface; when deploying the weight of the counterweight, the weight of the counterweight is set to 3kg, which meets the condition of G 配重 -G滑轮 -f 滑轮阻力 =F 配重等效 x K, wherein, G 浮漂实际 is the actual gravity of the float, F 配重等效 is the equivalent pulling force of the counterweight on the float after the multiple conversion of the pulley block, p 浮漂等效 is the equivalent density of the float after the action of F 配重等效 , V 浮漂 is the volume of the float, G 配重 is the gravity of the counterweight, G 滑轮 is the gravity of the multi-groove movable pulley, f 滑轮阻力 is the frictional resistance of the pulley block, and K is the length amplification multiple of the pulley block, p 浮漂等效 may be obtained according to p 泥浆 < p 浮漂 < p 砼 and according to the density of the on-site underwater concrete and the working condition of the mud density, V 浮漂 may be obtained according to the drainage method, G 浮漂实际 is obtained by measuring and calculating with a dynamometer, so F 浮漂实际 may be obtained according to the formula G 配重等效 -F 浮漂等效 = p 浮漂 x V 配重等效 , G 滑轮 and f 滑轮阻力 are obtained by measuring and calculating with a dynamometer, and F 配重等效 has been obtained according to the formula G 浮漂实际 -F 配重等效 = p 浮漂等效 x V 浮漂 , and K is the length amplification multiple of the pulley block, so G 配重 may be obtained according to the formula G 滑轮 -G 滑轮阻力 -f 配重等效 =F 配重 x K, which ensures that the fine steel wire rope can be kept in a straight state during the rising process of the float; when the number of pulley blocks is adjusted, the maximum stroke that can occur in the monitoring device of the pulling rope displacement sensor is 1.5 m, and the grooving depth of the underground continuous wall is 19.12 m, so the number of pulley blocks is determined to be 14.

[0041] (2) Monitoring device layout: After the device is assembled, it is slowly pushed on the hardened surface of the site. Due to the light weight of the device, it can be manually transported if necessary until it accurately reaches the target wall connecting position. The principle is to avoid concrete pouring points and steel reinforcement dense parts in the empty position and place one to several single devices uniformly. The length of a certain underground continuous wall is 6m, and three single devices are placed at the center point of the underground continuous wall plane and the position 2.5m away from the center point. The tension displacement sensors of the three single devices are integrated on the industrial computer through the connecting line, and the underwater concrete liquid level of multiple measuring points is monitored in real time on the industrial computer.

[0042] (3) Parameter setting and data initialization: After the floating guide wall top elevation is leveled, the parameters are set and the data is initialized. The underground continuous wall number is set as BLQ-6-N18, and the depth of the underground continuous wall is 17.07m. The data to be initialized includes the guide wall elevation H0 of 74m and the pulley rope length magnification k of 14.

[0043] (4) Real-time monitoring application: Before the underwater concrete pouring after the underground continuous wall is grooved, the float is lowered to the bottom of the underground continuous wall groove, and then two underwater concrete pouring points are poured at the same time. Since the density of the float is greater than the density of the mud and less than the density of the concrete, the float of the monitoring device will stay on the underwater concrete liquid surface and rise with the rise of the underwater concrete liquid surface. The data of the displacement of the float is scaled by 14 times by the pulley group and transmitted to the tension rope displacement sensor. The tension rope displacement sensor uploads the measured data to the monitoring system, which is analyzed by data analysis, and the underwater concrete elevation is monitored in real time.

[0044] (5) Balanced control during pouring: When the maximum difference of the underwater concrete liquid level elevation of the three measuring points is greater than the specification threshold of 50cm, the pouring speed of different underwater concrete pouring points is adjusted to ensure balanced pouring of the concrete. During the pouring of the underwater concrete, the elevation can be inversely calculated according to the amount of the poured underwater concrete, and compared with the real-time monitored elevation. When the difference is too large, it can be judged that the hole has collapsed.

[0045] (6) Intelligent early warning: when the maximum difference of underwater concrete liquid level elevation of multiple measuring points is greater than the specification threshold of 50 cm, the intelligent system will prompt that the current concrete pouring relative height is not uniform; when the underwater concrete pouring interval time exceeds the specification threshold of 30 min, the intelligent system will prompt that the underwater concrete pouring interval time is too long; when the difference between the real-time monitoring elevation of underwater concrete and the back-pushed elevation of the poured underwater concrete exceeds the set value of 0.5 m, the intelligent system will prompt that the underground continuous wall may have a hole collapse phenomenon; when the concrete pouring guide pipe buried depth is greater than the specification threshold of 2.5 m, the intelligent system will prompt to remove a section of guide pipe; the intelligent system will give a hierarchical warning when the underwater concrete liquid level elevation reaches the target elevation, and the target difference values are set as 5 m, 3 m, 1 m and 0 m; when the underwater concrete liquid level elevation is 5 m away from the target elevation, the intelligent system will prompt that the current underwater concrete liquid level elevation is 5 m away from the target elevation; when the underwater concrete liquid level elevation is 3 m away from the target elevation, the intelligent system will prompt that the current underwater concrete liquid level elevation is 3 m away from the target elevation; when the underwater concrete liquid level elevation is 1 m away from the target elevation, the intelligent system will prompt that the current underwater concrete liquid level elevation is 1 m away from the target elevation; and when the difference value is 0 m, the intelligent system will prompt that the underwater concrete pouring is completed.

[0046] (7) When the real-time elevations of multiple measuring points of underwater concrete have all exceeded the target elevation, the real-time monitoring of the underground continuous wall underwater concrete pouring is completed.

[0047] (8) After the monitoring is completed, the counterweight 13, the floating buoy 18, the pulley set 4, the pull rope displacement sensor 9, the guide pulley 12, the industrial computer 8 and the equipment rack are removed in sequence; the removed parts are transported to the next construction site for use or returned to the material storage warehouse for maintenance and storage.

[0048] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Within the scope of the present application, changes, modifications, additions or replacements made by those skilled in the art should be within the scope of the present application.

Claims

1. A real-time monitoring system for underwater concrete elevation of a diaphragm wall, characterized in that: It includes a monitoring device, a data analysis module, and a data monitoring and early warning module; the monitoring device uses one or more individual units; the data analysis module includes an elevation calculation formula: H n =H0-k xn Depth calculation formula: h n =k xn Elevation difference calculation formula: ΔH = H max -H min The data monitoring and early warning module includes real-time monitoring of underwater concrete elevation, warning of exceeding the maximum height difference of underwater concrete liquid level, warning of exceeding the time limit of underwater concrete pouring interval, warning of exceeding the height difference between the real-time monitoring elevation of underwater concrete and the back-calculated elevation of the poured underwater concrete, warning of exceeding the limit of the tremie pipe burial depth, and intelligent graded warning of underwater concrete liquid level before reaching the target elevation. The data measured by the monitoring device is analyzed and monitored and early warning is performed after data analysis.

2. The underground continuous wall underwater concrete elevation real-time monitoring system according to claim 1, characterized in that: The monomer device comprises a base rod (1) and a pulley block (4) for being stuck on the concrete (5) of the guide wall on both sides, a middle position of the base rod (1) is vertically fixedly installed with an equipment rack, an upper end of the equipment rack is installed with a pull rope displacement sensor (9) and a guide pulley (12), the pulley block (4) comprises a multi-groove movable pulley (15) and a multi-groove fixed pulley (16), a mounting bracket of the multi-groove fixed pulley (16) is fixedly installed at a lower end of the equipment rack, the multi-groove movable pulley (15) is located directly above the multi-groove fixed pulley (16), a sensor pull rope (6) of the pull rope displacement sensor (9) is connected with a mounting bracket of the multi-groove movable pulley (15), the mounting bracket of the multi-groove movable pulley (15) is further connected with a counterweight lifting rope (7), one end of the counterweight lifting rope (7) is connected with the mounting bracket of the multi-groove movable pulley (15), the other end of the counterweight lifting rope (7) is connected with a counterweight (13) after passing through the guide pulley (12), a floating buoy lifting rope (17) is wound on the multi-groove movable pulley (15) and the multi-groove fixed pulley (16) for multiple times, an upper end of the floating buoy lifting rope (17) is fixedly connected with the multi-groove movable pulley (15), and a lower end of the floating buoy lifting rope (17) is vertically connected with a floating buoy (18).

3. The underground continuous wall underwater concrete elevation real-time monitoring system according to claim 2, characterized in that: The base rod (1) comprises two horizontally arranged cross rods, and the bottom of the base rod (1) is connected with a supporting rod (3) for limiting and supporting the vertical surface of the guide wall concrete (5) through a connecting rod (2), and the two ends of the supporting rod (3) are respectively threadedly connected with screw rods.

4. The underground continuous wall underwater concrete elevation real-time monitoring system according to claim 2, characterized in that: The device frame is provided with an industrial computer (8), the industrial computer (8) is matched and connected with the pull rope displacement sensor (9), the industrial computer (8) is provided with a wireless transmission module, the wireless transmission module transmits the real-time data measured by the pull rope displacement sensor (9) to the cloud space; the elevation calculation formula H n =H0-kx n , wherein n represents the serial number of the monitoring point, the real-time elevation of the underwater concrete of the monitoring point is denoted as H n , H0 represents the guide wall elevation, k represents the rope length amplification multiple of the mixing wheel group, and x represents the real-time reading of the pull rope displacement sensor; the depth calculation formula h n =kx n , wherein n represents the serial number of the monitoring point, the depth from the underwater concrete liquid surface of the monitoring point to the guide wall elevation is denoted as h n , k represents the rope length amplification multiple of the mixing wheel group, and x represents the real-time reading of the pull rope displacement sensor; the height difference calculation formula ΔH=H max -H min , H max represents the maximum value of the real-time elevations of the plurality of monitoring points, H min represents the minimum value of the real-time elevations of the plurality of monitoring points, and ΔH represents the height difference value between the maximum value and the minimum value of the real-time elevations of the plurality of monitoring points; the data monitoring and early warning module comprises underwater concrete elevation real-time monitoring, underwater concrete liquid surface maximum height difference overrun prompt early warning, underwater concrete pouring interval time length overtime prompt early warning, underwater concrete real-time monitoring elevation and already poured underwater concrete backstepping elevation height difference overrun early warning, guide pipe buried depth overrun prompt early warning, and intelligent grading prompt early warning before underwater concrete liquid surface elevation reaches the target elevation. The data measured by the monitoring device is analyzed and monitored and early warning is performed after data analysis; The system can download data in cloud space and automatically analyze the data to form corresponding curve graphs.

5. The underground diaphragm wall underwater concrete elevation real-time monitoring system according to claim 4, characterized in that: The underwater concrete liquid surface maximum height difference overrun prompt early warning means that when the maximum height difference of the underwater concrete liquid surface elevation of multiple measuring points is greater than the specification threshold value, the intelligent prompt is that the relative height of the current concrete pouring is not uniform.

6. The underground diaphragm wall underwater concrete elevation real-time monitoring system according to claim 4, characterized in that: The underwater concrete pouring interval time length overrun prompt early warning means that when the underwater concrete pouring interval time length exceeds the specification threshold value, the intelligent prompt is that the underwater concrete pouring interval time length is too long.

7. The underground diaphragm wall underwater concrete elevation real-time monitoring system according to claim 4, characterized in that: The underwater concrete real-time monitoring elevation and the already-poured underwater concrete back-propagation elevation height difference overrun early warning means that when the underwater concrete real-time monitoring elevation and the already-poured underwater concrete back-propagation elevation height difference exceeds the set value, the intelligent prompt is that the underground continuous wall may have a hole collapse phenomenon.

8. The underground diaphragm wall underwater concrete elevation real-time monitoring system according to claim 4, characterized in that: The guide pipe burial depth overrun prompt early warning means that when the concrete pouring guide pipe burial depth is greater than the specification threshold value, the intelligent prompt is to remove a section of guide pipe.

9. The underground diaphragm wall underwater concrete elevation real-time monitoring system according to claim 4, characterized in that: The underwater concrete liquid surface elevation reaches the target elevation before the multiple measuring point intelligent grading prompt early warning, a plurality of target difference values are set, when the underwater concrete liquid surface elevation is less than the set difference value from the target elevation, the intelligent prompt is that the current underwater concrete liquid surface elevation is different from the target elevation, and when the difference value is 0, the intelligent prompt is that the underwater concrete pouring is completed.

10. The underground diaphragm wall underwater concrete elevation real-time monitoring system according to claim 1, characterized in that: The use steps of the underground continuous wall underwater concrete elevation real-time monitoring system are: Step one, monitoring device deployment: initially purchase a displacement sensor; according to the depth of the underground continuous wall, mud density, underwater concrete density and other working conditions, the density of the float, the weight of the counterweight, the number of pulley blocks and other contents are deployed. When adjusting the density of the float, the condition of G 浮漂实际 -F 配重等效 =ρ 浮漂等效 ×V 浮漂 must be met to ensure that the float can rise with the rising liquid level of the underwater concrete; when adjusting the weight of the counterweight, the condition of G 配重 -G 滑轮 -f 滑轮阻力 =F 配重等效 ×K must be met, where G 浮漂实际 is the actual gravity of the float, F 配重等效 is the equivalent tension of the counterweight on the float after conversion by the pulley block multiplier, ρ 浮漂等效 is the equivalent density of the float under the action of F 配重等效 , V 浮漂 is the volume of the float, G 配重 is the weight of the counterweight, G 滑轮 is the weight of the multi-slot movable pulley, f 滑轮阻力 is the frictional resistance of the pulley block, and K is the rope length magnification of the pulley block. ρ 浮漂等效 can be obtained according to ρ 泥浆 < ρ 浮漂 < ρ 砼 , according to the density of the underwater concrete and the density of the mud under the working conditions, V 浮漂 can be obtained according to the drainage method, and G 浮漂实际 can be obtained by measuring with a dynamometer. Therefore, F 浮漂实际 can be obtained according to the equation G 配重等效 -F 浮漂等效 =ρ 浮漂 ×V 配重等效 , G 滑轮 and f 滑轮阻力 can be obtained by measuring with a dynamometer, and F 配重等效 has been obtained according to the equation G 浮漂实际 -F 配重等效 =ρ 浮漂等效 ×V 浮漂 , and K is the rope length magnification of the pulley block. Therefore, G 配重 can be obtained according to the equation G 滑轮 -G 滑轮阻力 -f 配重等效 =F 配重 ×K, ensure that the float in the process of rising thin steel wire rope can keep straight; when adjusting the number of pulley blocks, according to the maximum stroke of the pull rope displacement sensor in the monitoring device and the trenching depth of the underground continuous wall, z1 represents the trenching depth of the underground continuous wall, z2 represents the maximum stroke of the pull rope displacement sensor in the monitoring device, so the number of pulley blocks z needs to be greater than z1 / z2; Step two, monitoring device layout: after the device is assembled, move the device to the target location of the continuous wall; the device is placed in a position that avoids the concrete pouring point and the steel bar dense part, and one or more single devices are placed uniformly to ensure that the float can be smoothly lowered to the bottom of the underground continuous wall; the tension displacement sensors of the multiple single devices are integrated on the industrial computer through the connecting line, and the underwater concrete liquid level of the multiple measuring points is monitored in real time on the industrial computer; Step three, parameter setting and data initialization: after the float is leveled with the top elevation of the guide wall, the parameters are set and the data is initialized; the set parameters include the underground continuous wall number and the depth of the continuous wall; the data to be initialized includes the guide wall elevation H0 and the rope length amplification multiple k of the pulley block; Step four, real-time monitoring application: before the underwater concrete pouring, the float is lowered to the bottom of the underground continuous wall slot, and then the multiple underwater concrete pouring points are poured at the same time; because the density of the float is greater than the density of the mud and less than the density of the concrete, the float of the monitoring device stays on the underwater concrete liquid surface and rises with the rising of the underwater concrete liquid surface; the data of the displacement of the float is scaled by the pulley block and then transmitted to the tension rope displacement sensor, the measured data is uploaded to the monitoring system by the tension rope displacement sensor, and the underwater concrete elevation is monitored in real time after data analysis; Step five, balanced control during pouring: when the maximum difference of the underwater concrete liquid level of the multiple measuring points is greater than the specification threshold, the pouring speed of different underwater concrete pouring points is adjusted to ensure balanced pouring of the concrete; during the pouring of the underwater concrete, the elevation is inversely calculated according to the amount of the poured underwater concrete, and compared with the real-time monitored elevation; when the difference is too large, it is judged as a hole collapse; Step six, intelligent early warning: when the maximum difference of the underwater concrete liquid level of the multiple measuring points is greater than the specification threshold, the intelligent prompt is given that the relative height of the current concrete pouring is not uniform; when the underwater concrete pouring interval time exceeds the specification threshold, the intelligent prompt is given that the underwater concrete pouring interval time is too long; when the difference between the real-time monitored elevation of the underwater concrete and the inversely calculated elevation of the poured underwater concrete exceeds the set value, the intelligent prompt is given that the underground continuous wall has a hole collapse phenomenon; when the concrete pouring guide pipe buried depth is greater than the specification threshold, the intelligent prompt is given to remove a section of the guide pipe; the multiple measuring points are intelligently classified and prompted for early warning before the underwater concrete liquid level reaches the target elevation, and multiple target differences are set in advance; when the underwater concrete liquid level is less than the set difference from the target elevation, the intelligent prompt is given that the current underwater concrete liquid level is different from the target elevation; when the difference is 0, the intelligent prompt is given that the underwater concrete pouring is completed; Step seven, when the real-time elevations of the multiple measuring points of the underwater concrete all exceed the target elevation, the real-time monitoring of the underwater concrete pouring of the underground continuous wall is completed.

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