A pouring process control and early warning system and method for a concrete cutoff wall

Abstract

The application discloses a pouring process control and early warning system and method for a concrete cutoff wall, which comprises a controller, a concrete liquid level detector for detecting the liquid level of a sub-hopper, a display for displaying data of the pouring process of the concrete cutoff wall, and an alarm for early warning when the total pouring time and the accumulated pause pouring time reach the upper limit, wherein the controller is provided with a timer, a counter and a processor; the processor collects signals of the concrete liquid level detector, controls the working of the timer, the counter and the alarm through output signals, and outputs the liquid level of the sub-hopper, the continuous pouring time, the pouring intermittent time and the pouring frequency of the sub-hopper to the display for display. The application realizes the analysis and early warning of the total pouring time, the real-time pouring elevation of the groove section and the pause pouring time, thereby realizing the in-process control of the concrete pouring process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pouring of concrete cutoff wall, in particular to a pouring process control and early warning system and method for concrete cutoff wall. BACKGROUND

[0002] The concrete cutoff wall is an important means for foundation treatment of current water conservancy and hydropower projects, especially when building a dam on deep overburden, it is an important measure for engineering seepage control. The current engineering cutoff wall has reached more than 100 meters. The construction quality of cutoff wall is directly related to the safety and efficiency of the project, however, the cutoff wall construction is a concealed project, which is difficult to control the construction process by direct means. The concrete pouring process is the core link of the cutoff wall construction process, however, the current concrete pouring process mainly adopts manual control method, and the concrete pouring speed and pipe pulling speed are mainly controlled according to the construction experience, which is easy to cause problems such as mud inclusion and cold joint, and the pouring speed is difficult to control accurately. Therefore, it is necessary to study a concrete cutoff wall pouring process monitoring method with intelligence and dynamic feedback to realize the in-process analysis and feedback control of concrete cutoff wall pouring process, which has great significance for ensuring the construction quality of cutoff wall, improving the one-time qualified rate of cutoff wall construction quality, improving the construction efficiency of concrete cutoff wall, and ensuring the seepage safety of water conservancy and hydropower projects.

[0003] At present, the in-process control of concrete cutoff wall construction quality mainly combines with design indicators to control part of parameters, such as CN113062324A discloses a method for selecting concrete type and controlling pouring process of cutoff wall concrete pouring process to prevent the problem of initial setting of concrete top surface; Zhusheng, “Discussion on how to control the construction quality of plastic concrete cutoff wall”, the article is published in 2021 “Low Carbon World”, analyzes the control points and important measures of construction quality control of plastic cutoff wall construction process; CN111042061B discloses a construction method of super deep cutoff wall, which details the trenching process, hole cleaning and concrete pouring process, realizes the construction of cutoff wall in deep overburden layer with a depth of more than 180 meters, etc.; “Analysis of steel wire rope grab trenching technology for super deep cutoff wall construction in high altitude area” by Liu Dianzhong et al., the article is published in 2020 edition of “Sichuan Water Conservancy”, which summarizes the construction experience of steel wire rope grab trenching method for cutoff wall engineering of water conservancy project in Tibet high altitude area with extremely complex geological conditions. However, the above methods mainly control the construction process according to the design size of concrete cutoff wall and construction experience, and there is no research on the analysis and feedback control of the actual construction state of concrete cutoff wall.

[0004] For the concrete cutoff wall pouring process control, Yang Li et al. published "Analysis of cutoff wall concrete pouring quality control" in "Northwest Hydroelectricity" in 2011. The article describes the quality control measures of cutoff wall concrete pouring from the aspects of pouring time, guide pipe configuration and layout, and pouring process. CN105155545A discloses a method for fixing the guide pipe using a fixed guide pipe device for the cutoff wall slot section pouring process. CN112627246A discloses an intelligent analysis method for realizing the filling effect of concrete by analyzing the dielectric constant of the material in the slot using the resistivity method.

[0005] CN113062324A discloses a new method for pouring concrete for cutoff wall. However, existing research has not yet analyzed the pouring time of concrete, making it difficult to realize real-time feedback of the pouring process parameters of concrete for cutoff wall, and reducing the analysis effect of construction quality.

[0006] In summary, the existing research on the quality control method of concrete pouring for cutoff wall of water conservancy and hydropower projects mainly uses on-site manual control, which makes it difficult to realize in-process control of concrete cutoff wall construction, and reduces the effect of construction quality control. SUMMARY

[0007] The present application provides a pouring process control and early warning system and method for concrete cutoff wall to solve the technical problems existing in the prior art.

[0008] The technical solution adopted by the present application to solve the technical problems existing in the prior art is: a pouring process control and early warning system for concrete cutoff wall, comprising a controller and a concrete liquid level detector, a display and an alarm all in communication with the controller, and a timer, a counter and a processor arranged in the controller.

[0009] The concrete liquid level detector is used to detect the liquid level height of the distribution hopper;

[0010] The timer is used to time the continuous pouring time and intermittent pouring time of concrete;

[0011] The counter is used to accumulate the pouring frequency of the distribution hopper;

[0012] The display is used to display the data of the pouring process of the concrete cutoff wall;

[0013] The alarm is used to warn that the total pouring time of concrete and the accumulated pause pouring time are about to reach the upper limit;

[0014] The processor collects the signals of the concrete liquid level detector, controls the operation of the timer, the counter and the alarm through the output signals, and outputs the liquid level height of the distribution hopper, the continuous pouring time, the intermittent pouring time and the pouring frequency of the distribution hopper to the display for display.

[0015] Further, the concrete liquid level detector comprises a distance measuring sensor.

[0016] Further, the distance measuring sensor is an infrared distance measuring sensor or a laser distance measuring sensor.

[0017] Further, the controller is a programmable controller.

[0018] Further, the display is a human-machine interface.

[0019] Further, a host computer is further included, the controller outputs the concrete liquid level height value of the distribution hopper, the continuous pouring time, the pouring intermittent time and the pouring frequency of the distribution hopper to the host computer, the host computer analyzes and processes the input signals, and sends signals to the controller after processing.

[0020] The application further provides a pouring process control and early warning method for a concrete cutoff wall, a controller, a concrete liquid level detector, a display and an alarm device which are in communication with the controller are arranged, a timer, a counter and a processor are designed in the controller;

[0021] The concrete liquid level detector is used to detect the concrete liquid level height of the distribution hopper.

[0022] The timer is used to time the continuous pouring time and the pouring intermittent time of the concrete.

[0023] The counter is used to accumulate the pouring frequency of the distribution hopper.

[0024] The display is used to display the data of the pouring process of the concrete cutoff wall.

[0025] The alarm device is used to early warn that the total pouring time of the concrete and the accumulated pause pouring time are about to reach the upper limit.

[0026] The processor is used to collect the signals of the concrete liquid level detector, output the signals to control the working of the timer, the counter and the alarm device, and output the concrete liquid level height value of the distribution hopper, the continuous pouring time, the pouring intermittent time and the pouring frequency of the distribution hopper to the display for display.

[0027] Further, the method comprises the following steps:

[0028] Step A: a concrete liquid level detector is installed on a concrete distribution hopper, a controller collects the signals of the concrete liquid level detector, and a time sequence of the concrete liquid level height in the distribution hopper is obtained.

[0029] Step B: the concrete liquid level height when the distribution hopper is empty is H0, and the concrete liquid level height when the distribution hopper is full is H fThe controller compares the concrete level height over time. When the concrete level in the distribution hopper gradually increases from H0, it determines that the current time is the start time of concrete pouring; when the concrete level in the distribution hopper gradually increases from H0, it determines that the current time is the start time of concrete pouring. f When the volume of concrete begins to gradually decrease, this is the time when concrete pouring begins; when the concrete level in the hopper decreases from H... f When the water level drops to H0, this is the completion time of pouring; when the concrete level in the distribution hopper increases from H0 to H... f And from H f When the water level drops to H0, the counter increments by 1; when the continuous measurement change in the concrete liquid level is lower than the set threshold, the concrete pouring is considered to be suspended during this period.

[0030] Step C: The controller calculates the maximum total concrete pouring time based on the depth of the trench and the required minimum concrete rising speed; the timer starts counting from the start of pouring and calculates the current pouring time in real time. When the pouring time is ≥ 90% of the maximum total pouring time, the controller outputs a total pouring time warning signal to the alarm and display, and the alarm issues a total pouring time warning signal.

[0031] Step D: Based on the start time of concrete entering the trench from the distribution hopper, the completion time of entering the trench, the counter count value, and the volume of concrete in the distribution hopper, obtain the real-time volume of concrete entering the trench; based on the structure of the anti-seepage wall trench, obtain the real-time concrete pouring height inside the trench.

[0032] Step E: Accumulate the paused pouring time and compare it with the maximum allowable paused pouring time. When the cumulative paused pouring time is greater than or equal to 90% of the maximum allowable paused pouring time, the controller outputs a warning signal for the cumulative paused pouring time to the alarm and the display. The alarm issues a warning signal for the cumulative paused pouring time.

[0033] Furthermore, a host computer is set up so that the controller can send the concrete level height of the distribution hopper, the continuous pouring time, the pouring interval time, and the number of pours in the distribution hopper to the host computer. The host computer establishes an early warning model for the total concrete pouring time, an analysis model for the concrete pouring height in the trench section, and an early warning model for the concrete pouring pause time. The models can track the real-time concrete pouring height, total pouring time, and cumulative pause time in the trench.

[0034] Furthermore, the method and steps for establishing a concrete total pouring time early warning model, a concrete pouring height analysis model within a trench section, and a concrete pouring pause time early warning model within the host computer include the following steps:

[0035] Step 1: The controller collects the time series H of the concrete liquid level height in the hopper at the same sampling time interval, H = (h, t), and sends it to the host computer, where h is the height value and t is the sampling time;

[0036] Step 2: Let Δt be the liquid level measurement time interval, the host computer based on H, the concrete pouring start time, each tank concrete pouring start time, end time and interruption time are as follows:

[0037] Let the initial time be 0, at this time there is no material in the hopper, h(0) is the initial height of the concrete liquid level, the first tank concrete pouring start time is calculated according to the following formula:

[0038] h(t+(c+1)Δt)-h(t+cΔt)>h s (1)

[0039] T s =t (2)

[0040] In the formula: Δt is the liquid level measurement time interval; c=1,2,3..., c t , c t is the sampling number at time t; h s is the set threshold value of the difference between the adjacent two sampling liquid levels; when the difference between the adjacent two sampling liquid levels is greater than the threshold value h t for c s times in a row, it is considered that the concrete transport truck starts to unload into the hopper; T s is the start pouring time;

[0041] The current i-th tank unloading end time and the next tank concrete start time are calculated according to the following formula:

[0042] h(t+cΔt)-h(t+(c+1)Δt)>h s (3)

[0043]

[0044]

[0045]

[0046] Among them is the i-th tank concrete pouring end time, when the negative value of the difference between the adjacent two sampling liquid levels for many times in a row is greater than the threshold value h s , it means that the tank concrete pouring is completed; is the smallest positive integer that satisfies formula (5), c s indicates the minimum value that satisfies the rising of the measured liquid level twice; indicates the intermediate time interval from the i-th tank end to the i+1-th tank start;

[0047] is the i+1-th tank concrete pouring start time;

[0048] The concrete pouring pause time is calculated according to the following formula:

[0049] h(t+(c p +1)Δt)=h(t+c p Δt) (7)

[0050]

[0051] To meet the minimum positive integer of formula (7), it is indicated that the liquid level does not change in the two measurement processes, To meet the maximum positive integer of formula (7);

[0052] T p is the pause length, indicating that the concrete liquid level does not change in the time period, and it is considered that the concrete pouring is paused at this time period;

[0053] Step 3: Establish the concrete pouring total time warning model as shown in the following formula:

[0054] T a =D / v (9)

[0055] T b =T-T s (10)

[0056] T a -T b <T w (11)

[0057] Wherein D is the depth of the tank section, v is the minimum required hourly rising speed, T s is the start pouring time, T is the current time, T b is the poured time, T a is the maximum allowed pouring time; when the difference between T a and T b is less than the threshold T w , T w >0, the total pouring time warning is performed;

[0058] Step 4: Establish the concrete pouring height analysis model in the diaphragm wall tank section as shown in the following formula:

[0059]

[0060]

[0061] Wherein V n is the nth tank concrete volume, m is the total tank number, d is the pouring height in the tank section, A dis the horizontal section area of the groove section at the d height; V m is the real-time concrete volume entering the groove;

[0062] Step 5: Establish the concrete pouring pause time analysis model shown in the following formula:

[0063]

[0064] wherein is the concrete pouring pause time warning threshold, T p is the concrete pouring pause cumulative time, and when the concrete pouring pause time exceeds the threshold, a warning is given.

[0065] The present application has the advantages and positive effects that: the present application realizes the analysis of the concrete start pouring time, the start pouring and pouring completion time of each tank of concrete, and the concrete pouring pause time by monitoring the concrete liquid level height during the concrete pouring process, and further realizes the analysis and warning of the total concrete pouring time, the real-time pouring elevation of the groove section, and the pouring pause time, so as to realize the in-process control of the concrete pouring process, prevent the cold joint, top layer solidification and other adverse phenomena of the concrete cutoff wall, and effectively ensure the concrete pouring quality. The method can control the construction process during the concrete cutoff wall pouring stage, realize the in-process analysis and feedback control of the construction process, make up for the problem that the traditional method is difficult to realize the real-time feedback of the concrete pouring process, and realize the change of the construction quality of the concrete cutoff wall from post-control to in-process control. BRIEF DESCRIPTION OF DRAWINGS

[0066] Fig. 1 is a pouring process control and warning system structure diagram of a concrete cutoff wall of the present application.

[0067] Fig. 2 is a pouring process control and warning method work flow diagram of a concrete cutoff wall of the present application. DETAILED DESCRIPTION

[0068] In order to further understand the inventive content, characteristics and effects of the present application, the following examples are listed and described in detail as follows in conjunction with the drawings:

[0069] Please refer to Figs. 1-2 A pouring process control and warning system of a concrete cutoff wall, comprising a controller and a concrete liquid level detector, a display and an alarm all in communication with the controller, wherein the controller is provided with a timer, a counter and a processor;

[0070] The concrete liquid level detector is used to detect the concrete liquid level height of the distribution hopper;

[0071] The timer is used to time the continuous pouring time and the intermittent pouring time of the concrete.

[0072] The counter is used for accumulating the pouring times of the distribution hopper;

[0073] The display is used for displaying the data of the pouring process of the concrete cutoff wall;

[0074] The alarm is used for early warning when the total pouring time and the accumulated pause pouring time reach the upper limit;

[0075] The processor collects the signal of the concrete liquid level detector, outputs the signal to control the working of the timer, the counter and the alarm, and outputs the concrete liquid level value of the distribution hopper, the continuous pouring time, the pouring intermittent time and the pouring times of the distribution hopper to the display for display.

[0076] Preferably, the concrete liquid level detector can comprise a distance measuring sensor.

[0077] The distance measuring sensor can be installed on the top of the distribution hopper or above the distribution hopper, and a measuring reference surface is taken on the top of the distribution hopper, since the height between the measuring reference surface on the top of the distribution hopper and the bottom of the distribution hopper is a fixed value, the height difference between the concrete liquid level and the height of the reference surface on the top of the distribution hopper is detected to obtain the liquid level height of the concrete liquid level relative to the bottom of the distribution hopper. Other concrete liquid level detectors can be installed according to the working principle and the instruction.

[0078] Preferably, the distance measuring sensor can be an infrared distance measuring sensor or a laser distance measuring sensor.

[0079] Preferably, the controller can be a programmable controller.

[0080] Preferably, the display can be a human-computer interface.

[0081] Preferably, the alarm can be an audible and visual alarm, which can early warn the total pouring time and the accumulated pause pouring time reaching the upper limit through different colors of light or sound.

[0082] Preferably, the upper computer can also be comprised, the controller outputs the concrete liquid level value of the distribution hopper, the continuous pouring time, the pouring intermittent time and the pouring times of the distribution hopper to the upper computer, the upper computer analyzes and processes the input signal, and sends the signal to the controller after processing.

[0083] The application also provides a pouring process control and early warning method of a concrete cutoff wall, a controller, a concrete liquid level detector, a display and an alarm which are all in communication with the controller are set, a timer, a counter and a processor are designed in the controller;

[0084] The concrete liquid level detector is used for detecting the concrete liquid level of the distribution hopper;

[0085] The timer is used to time the continuous pouring time and the intermittent pouring time of the concrete;

[0086] The counter is used to accumulate the pouring times of the distribution hopper;

[0087] The display is used to display the data of the pouring process of the concrete cutoff wall;

[0088] The alarm is used to give a warning when the total pouring time and the accumulated pause pouring time reach the upper limit;

[0089] The processor is used to collect the signals of the concrete liquid level detector, output the signals to control the working of the timer, the counter and the alarm, and output the concrete liquid level height value of the distribution hopper, the continuous pouring time, the intermittent pouring time and the pouring times of the distribution hopper to the display for display.

[0090] Preferably, the method can comprise the following steps:

[0091] Step 1, the concrete liquid level detector can be installed on the concrete distribution hopper, and the controller can collect the signals of the concrete liquid level detector to obtain the time sequence of the concrete liquid level height in the distribution hopper;

[0092] Step 2, the concrete liquid level height of the empty distribution hopper can be H0, and the concrete liquid level height of the full distribution hopper can be H f ; the controller can compare the time sequence of the concrete liquid level height, and when the concrete liquid level height of the distribution hopper gradually increases from H0, it can be judged that the current time is the starting pouring time of the concrete; when the concrete liquid level height of the distribution hopper gradually decreases from H f , it can be judged that the current time is the starting pouring time of the concrete; when the concrete liquid level height of the distribution hopper decreases from H f to H0, it can be judged that the current time is the completion pouring time of the concrete; when the concrete liquid level height of the distribution hopper increases from H0 to H f , and then decreases from H f to H0, the counter can be increased by 1; when the continuously measured change of the concrete liquid level height is lower than the set threshold value, it can be considered that the concrete pouring is paused at this time;

[0093] Step 3, the controller can calculate the maximum value of the total pouring time according to the depth of the groove section and the required minimum rising speed of the concrete; the timer can start timing from the starting pouring time, and can calculate the current pouring time in real time; when the pouring time is greater than or equal to 90% of the maximum value of the total pouring time, the controller can output the total pouring time warning signal to the alarm and the display, and the alarm can give a warning of the total pouring time;

[0094] Step 4, the real-time pouring concrete volume can be obtained according to the concrete entering slot start time, entering slot completion time, counter value and concrete volume of the distribution hopper; and the real-time pouring concrete height in the slot body can be obtained according to the diaphragm wall slot body structure;

[0095] Step 5, the pause pouring cumulative time can be accumulated and compared with the maximum allowed pause pouring time, and when the pause pouring cumulative time is greater than 90% of the maximum allowed pause time, the controller outputs the pause pouring cumulative time early warning signal to the alarm and the display, and the alarm sends the pause pouring cumulative time early warning signal.

[0096] Preferably, the upper computer can also be provided, so that the controller sends the distribution hopper concrete liquid level value, continuous pouring time, pouring intermittent time and pouring times of the distribution hopper to the upper computer, and the concrete total pouring time early warning model, the slot segment concrete pouring height analysis model and the concrete pouring pause time early warning model can be established in the upper computer; the real-time pouring concrete height in the slot body, the total pouring time and the pause pouring cumulative time can be tracked in real time through the model.

[0097] Preferably, the method steps of establishing the concrete total pouring time early warning model, the slot segment concrete pouring height analysis model and the concrete pouring pause time early warning model in the upper computer can include the following steps:

[0098] Step 1: the controller can collect the concrete liquid level height time sequence H, H = (h, t) in the distribution hopper according to the same sampling time interval, and send it to the upper computer, where h is the height value and t is the sampling time.

[0099] Step 2: Δt can be set as the liquid level measurement time interval, and the upper computer can analyze and calculate the concrete pouring start time, each tank concrete pouring start time, end time and interruption time based on the concrete liquid level height time sequence H, H = (h, t) in the distribution hopper as follows:

[0100] Let the initial time be 0, at this time there is no material in the distribution hopper, h(0) is the initial height value of the concrete liquid level, and the first tank concrete pouring start time can be calculated according to the following formula:

[0101] h(t+(c+1)Δt)-h(t+cΔt)>h s (1)

[0102] T s =t (2)

[0103] In the formula, Δt is the liquid level measurement time interval; c = 1, 2, 3,..., c t , c t is the sampling number sequence number at t; h sThe threshold value is the difference in liquid level height between two consecutive samples; when c... t The difference in liquid level between two consecutive samples is greater than the threshold h. s At that time, it is considered that unloading begins from inside the concrete transport truck into the distribution hopper; T s This is the start time for pouring.

[0104] Calculate the current unloading end time of the i-th batch and the start time of the next batch of concrete using the following formula:

[0105] h(t+cΔt)-h(t+(c+1)Δt)>h s (3)

[0106]

[0107]

[0108]

[0109] in Let h be the end time of the i-th concrete pouring. When the negative value of the difference between the liquid level heights of two consecutive adjacent samples is greater than the threshold h, s This indicates that the concrete pouring in that tank is complete; To satisfy the smallest positive integer in formula (5), c s This represents the minimum value that satisfies the requirement of two measurements of liquid level rise; This represents the time interval between the end of the i-th tank and the start of the (i+1)-th tank.

[0110] This represents the start time of the (i+1)th concrete pour.

[0111] Calculate the concrete pouring pause time using the following formula:

[0112] h(t+(c p +1)Δt)=h(t+c p Δt) (7)

[0113]

[0114] The smallest positive integer that satisfies formula (7) indicates that the liquid level does not change during the two measurements. The largest positive integer that satisfies formula (7).

[0115] T p The pause duration indicates the time during which the pause is paused. If the concrete level does not change during the time period, then the concrete pouring is considered to be suspended during this period.

[0116] Step 3: Establish the concrete pouring total time early warning model as shown in the following formula:

[0117] T a = D / v (9)

[0118] T b = T-T s (10)

[0119] T a -T b <T w (11)

[0120] Wherein D is the depth of the slot section, v is the minimum required hourly rising speed, T s is the start pouring time, T is the current time, T b is the poured time, T a is the maximum allowed pouring time; when the difference between T a and T b is less than the threshold T w , T w >0, the total pouring time early warning is carried out.

[0121] Step 4: Establish the concrete pouring height analysis model in the diaphragm wall slot section as shown in the following formula:

[0122]

[0123]

[0124] Wherein V n is the nth tank concrete volume, m is the total number of tanks, d is the pouring height in the slot section, A d is the horizontal cross-sectional area of the slot section at the height d; V m is the real-time in-slot concrete volume.

[0125] Step 5: Establish the concrete pouring suspension time analysis model as shown in the following formula:

[0126]

[0127] Wherein is the concrete pouring suspension time early warning threshold, T p is the cumulative concrete pouring suspension time, when the concrete pouring suspension time exceeds the threshold, the early warning is carried out.

[0128] Split hopper: a transfer equipment for pouring concrete into the diaphragm wall slot. The concrete truck pours concrete into the split hopper, and the split hopper slowly unloads concrete into the diaphragm wall slot for pouring.

[0129] First tank concrete: the concrete poured into the distribution hopper by the first concrete tank truck.

[0130] The concrete liquid level detector, the controller, the host computer, the display and the alarm, the controller is equipped with timer, counter and processor, ranging sensor, infrared ranging sensor, laser ranging sensor, etc. can use the existing technology in the applicable components and function modules, or use the existing technology in the applicable components and function modules and use conventional technical means to build.

[0131] The concrete total pouring time early warning model, the concrete pouring height analysis model in the slot segment and the concrete pouring suspension time early warning model can use the applicable function modules in the prior art, or use the hardware and software in the prior art, and construct according to the programming manual using conventional technical means.

[0132] The communication connection method of the concrete liquid level detector, the controller, the host computer, the display and the alarm can use the existing technology to connect and communicate, such as through field bus or wireless WIFI communication. Specifically, it can be selected according to the pouring site conditions and connected and communicated according to the component specification.

[0133] The above-described embodiments are only used to illustrate the technical ideas and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot be limited to the patent range of the present application only by the present embodiment, that is, any equivalent changes or modifications made in the spirit disclosed by the present application still fall within the patent range of the present application.

Claims

1. A system for controlling and early warning of the pouring process of a concrete cutoff wall, characterized in that, The controller is connected with a concrete liquid level detector, a display and an alarm, and is provided with a timer, a counter and a processor; The concrete liquid level detector is used for detecting the concrete liquid level of the distribution hopper; The timer is used for timing the continuous pouring time and the intermittent pouring time of the concrete; The counter is used for accumulating the pouring times of the distribution hopper; The display is used for displaying the data of the pouring process of the concrete cutoff wall; The alarm is used for warning that the total pouring time and the accumulated pause pouring time are close to the upper limit; The processor collects the signals of the concrete liquid level detector, controls the working of the timer, the counter and the alarm through the output signals, and outputs the concrete liquid level value of the distribution hopper, the continuous pouring time, the intermittent pouring time and the pouring times of the distribution hopper to the display for display; The upper computer is further provided, the controller outputs the concrete liquid level value of the distribution hopper, the continuous pouring time, the intermittent pouring time and the pouring times of the distribution hopper to the upper computer, the upper computer analyzes and processes the input signals, and sends the processed signals to the controller; The total pouring time warning model, the pouring height analysis model and the pause pouring time warning model are established in the upper computer; The controller collects the time sequence H of the concrete liquid level in the distribution hopper at the same sampling time interval and sends the time sequence H to the upper computer, wherein h is the height value and t is the sampling time; Set For the liquid level measurement time interval, the host computer analyzes and calculates the concrete pouring start time, the start time, end time and interruption time of each tank of concrete based on H. The initial time is 0, the distribution hopper is empty at this time, h(0) is the initial height value of the concrete liquid level, the first tank pouring start time is calculated according to the following formula: h(t+(c+1) )-h(t+c )> (1); =t（2）； In the formula: is the liquid level measurement time interval; c = 1, 2, 3,... , is the sampling number sequence at time t; is the set liquid level height difference threshold value between adjacent two samplings; When continuous The difference in liquid level between two consecutive samples is greater than this threshold. At that time, it is considered that the unloading of concrete from the concrete truck into the distribution hopper begins. This refers to the start time of pouring; The current i-th tank unloading end time and the next tank pouring start time are calculated according to the following formula: h(t+c )-h(t+(c+1) )> (3); =t（4）； h( +( +1) )-h( + )> (5); = + （6）； wherein is the end time of the i-th tank concrete pouring, when the negative value of the difference between the liquid level height of the continuous multiple adjacent two times sampling is greater than the threshold value , then it indicates that the tank concrete pouring is completed; = , +1, +2,..., + -1, is the minimum positive integer satisfying formula (5), indicates the minimum value satisfying the liquid level height rising of two times measurement; indicates the intermediate time interval from the i-th tank end to the i+1-th tank start; t0is the start time of the first tank; ti+1is the start time of the i+1 tank; The pause pouring time is calculated according to the following formula: h(t+1) = h(t) + h(t) (7) +1) )=h(t+ )(7); = （8）； = , +1, +2,..., + -1, is the minimum positive integer satisfying equation (7) indicating no change in liquid level between two measurements, is the maximum positive integer satisfying equation (7). is a pause duration, indicating that the concrete pouring is paused for If the concrete liquid level does not change in the time period, it is considered that the concrete pouring is paused in this time period; The total pouring time warning model is established as shown in the following formula: =D / v(9); =T- （10）； - < （11）； where D is the slot depth, v is the minimum required rising speed per hour of design, is the start pouring time, T is the current time, is the poured time, is the maximum allowed pouring time; when and the difference between them is less than the threshold , > 0, the total pouring time warning is performed; The pouring height analysis model of the cutoff wall groove is established as shown in the following formula: （12）； （13）； wherein is the first is the total number of tanks, is the pouring height of the tank section, is the horizontal section area of the tank section at height d; is the real-time pouring amount of concrete into the tank; The pause pouring time warning model is established as shown in the following formula: > （14）； wherein is a concrete pouring pause duration warning threshold value, is a concrete pouring pause cumulative duration, and when the concrete pouring pause duration exceeds the threshold value, a warning is given.

2. The system according to claim 1, wherein, The concrete liquid level detector comprises a distance measuring sensor.

3. The system according to claim 2, wherein, The distance measuring sensor is an infrared distance measuring sensor or a laser distance measuring sensor.

4. The system according to claim 1, wherein, The controller is a programmable controller.

5. The system for controlling and warning of the construction process of a concrete diaphragm wall according to claim 1, characterized in that, The display is a human-computer interface.

6. A method for controlling and early warning of the pouring process of a concrete diaphragm wall, characterized in that, The controller is connected with a concrete liquid level detector, a display and an alarm, and is provided with a timer, a counter and a processor; The concrete liquid level detector is used for detecting the concrete liquid level of the distribution hopper; The timer is used for timing the continuous pouring time and the intermittent pouring time of the concrete; The counter is used for accumulating the pouring times of the distribution hopper; The display is used for displaying the data of the pouring process of the concrete cutoff wall; The alarm is used for warning that the total pouring time and the accumulated pause pouring time are close to the upper limit; The processor collects the signals of the concrete liquid level detector, controls the working of the timer, the counter and the alarm through the output signals, and outputs the concrete liquid level value of the distribution hopper, the continuous pouring time, the intermittent pouring time and the pouring times of the distribution hopper to the display for display; The upper computer is also arranged, so that the controller sends the concrete liquid level height value of the distribution hopper, the continuous pouring time, the pouring intermittent time and the pouring times of the distribution hopper to the upper computer, and establishes a concrete total pouring time length early warning model, a concrete pouring height analysis model in the groove section and a concrete pouring pause time early warning model in the upper computer; the real-time concrete pouring height in the groove body, the total pouring time length and the pause pouring cumulative time length are tracked in real time through the models; The method steps for establishing the concrete total pouring time length early warning model, the concrete pouring height analysis model in the groove section and the concrete pouring pause time early warning model in the upper computer include the following steps: Step 1: the controller collects the concrete liquid level height time sequence H in the distribution hopper according to the same sampling time interval, H=(h, t), and sends it to the upper computer, wherein h is the height value and t is the sampling time; Step 2: Set For the liquid level measurement time interval, the host computer analyzes and calculates the concrete pouring start time, the start time, end time and interruption time of each tank of concrete based on H. Supposing that the initial time is 0, there is no material in the distribution hopper at this time, h(0) is the initial height value of the concrete liquid level, and the first tank concrete pouring start time is calculated according to the following formula: h(t + (c + 1) ) - h(t + c ) (1); =t（2）； In the formula: is the liquid level measurement time interval; c = 1, 2, 3,... , is the sampling number sequence at time t; is the set liquid level height difference threshold value between adjacent two samplings; When the difference between the two consecutive sampled liquid levels is greater than the threshold value When the difference between the two consecutive sampled liquid levels is greater than the threshold value When the difference between the two consecutive sampled liquid levels is greater than the threshold value When the difference between the two consecutive sampled liquid levels is greater than the threshold value The current i tank unloading end time and the next tank concrete start time are calculated according to the following formula: h(t+c )-h(t+(c+1) )> (3); =t（4）； h( +( +1) )-h( + )> (5); = + （6）； wherein is the end time of the i-th tank concrete pouring, when the negative value of the difference between the liquid level height of the continuous multiple adjacent two times sampling is greater than the threshold value , then it indicates that the tank concrete pouring is completed; , +1, +2,..., + -1, is the minimum positive integer satisfying formula (5), indicates the minimum value satisfying the liquid level height rising of two times measurement; indicates the intermediate time interval from the i-th tank end to the i+1-th tank start;​ t; is the start time of the i + 1 concrete pouring; The concrete pouring pause time is calculated according to the following formula: h(t+1) = h(t) + h(t) - h(t) = h(t) (6) +1) )=h(t+ )(7); = （8）； = , +1, +2,..., + -1, is the minimum positive integer satisfying equation (7) indicating no change in liquid level between two measurements, is the maximum positive integer satisfying equation (7). is a pause duration, indicating that the concrete pouring is paused for If the concrete liquid level does not change in the time period, it is considered that the concrete pouring is paused in this time period; Step 3: the concrete total pouring time length early warning model shown in the following formula is established: =D / v(9); =T- （10）； - < （11）； where D is the slot depth, v is the minimum required ascending speed per hour of design, is the start pouring time, T is the current time, is the poured time, is the maximum allowed pouring time; when and the difference between them is less than the threshold , > 0, the total pouring time warning is performed; Step 4: the concrete pouring height analysis model in the diaphragm wall groove section shown in the following formula is established: （12）； （13）； wherein is the first is the total number of tanks, is the pouring height of the tank section, is the horizontal cross-sectional area of the tank section at height d; is the real-time pouring amount of concrete into the tank; Step 5: the concrete pouring pause time early warning model shown in the following formula is established: > （14）； wherein is a concrete pouring pause duration warning threshold value, is a concrete pouring pause cumulative duration, and when the concrete pouring pause duration exceeds the threshold value, a warning is given.

7. The method according to claim 6, wherein the method further comprises the steps of: determining the position of the concrete diaphragm wall by using the position of the concrete pouring pipe; and determining the position of the concrete diaphragm wall by using the position of the concrete pouring pipe. The method includes the following steps: Step A, a concrete liquid level detector is installed on the concrete distribution hopper, and the controller collects the signal of the concrete liquid level detector to obtain the concrete liquid level height time sequence in the distribution hopper; Step B, set the concrete liquid level height of the distribution hopper empty H0, full concrete liquid level height H f ; the controller compares the time series of the concrete liquid level, when the concrete liquid level height of the distribution hopper starts to gradually increase from H0, then the current time is judged as the concrete pouring time; when the concrete liquid level height of the distribution hopper starts to gradually decrease from H f , this time is the concrete pouring time; when the concrete liquid level height of the distribution hopper decreases from H f to H0, this time is the pouring completion time; when the concrete liquid level height of the distribution hopper increases from H0 to H f , and then decreases from H f to H0, the counter adds 1; when the continuous measurement change of the concrete liquid level is lower than the set threshold, it is considered that the concrete pouring is temporarily suspended at this time; Step C, the controller calculates the maximum value of the total pouring time length according to the groove section depth and the required minimum concrete rising speed; the timer starts timing from the start pouring time, and the current pouring time length is calculated in real time; when the pouring time length ≥ 90% of the maximum value of the total pouring time length, the controller outputs the total pouring time length early warning signal to the alarm and the display, and the alarm outputs the total pouring time length early warning signal; Step D, the real-time in-groove concrete volume is obtained according to the distribution hopper concrete start-in-groove time, the in-groove completion time, the counter value and the distribution hopper concrete volume; and the real-time concrete pouring height in the groove body is obtained according to the diaphragm wall groove body structure; Step E, the pause pouring cumulative time length is accumulated and compared with the required maximum allowed pause pouring time length; when the pause pouring cumulative time length ≥ 90% of the maximum allowed pause time length, the controller outputs the pause pouring cumulative time length early warning signal to the alarm and the display, and the alarm outputs the pause pouring cumulative time length early warning signal.

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