Embedded supporting demolding device for concrete construction of air energy storage chamber

Abstract

The invention relates to the technical field of supporting demolding, in particular to an embedded supporting demolding device for air energy storage chamber concrete construction. A sensor and a demolding control system are additionally arranged in the steel plate laying supporting rack, whether a top plate can be demolded or not is evaluated by monitoring and analyzing the oil cylinder pressure of each supporting oil cylinder, and the oil cylinder pressure and oil cylinder displacement changes of the top plate supporting oil cylinders are analyzed in real time in the top plate demolding process; obtaining an abnormal shrinkage coefficient of a top plate supporting oil cylinder to control demolding; after the next adjacent steel plate begins to be demoulded, the steel plate is controlled to be demoulded based on the change relation between the oil cylinder displacement and the oil cylinder pressure in the top plate demoulding process; and iterating in sequence until all the steel plates are demoulded. According to the method, the oil cylinder pressure change and the oil cylinder displacement change of the supporting oil cylinder corresponding to each steel plate are monitored and analyzed, the abnormal jamming possibility in the demolding process is evaluated, whether forced abnormal shrinkage exists or not is evaluated, and therefore shrinkage of the supporting oil cylinders is effectively controlled, and the demolding effect is improved.

Description

Technical Field

[0001] This invention relates to the field of support demolding technology, and more specifically to a pre-embedded support demolding device for concrete construction of air storage chambers. Background Technology

[0002] The air storage chamber is mainly constructed through secondary lining to form a robust structure. Currently, the concrete construction of the chamber is mainly carried out using a steel plate laying and rebar tying needle beam trolley device. This device mainly consists of a steel plate laying support frame, a rebar tying frame, and needle beams. Among them, the rebar tying frame is used for rebar tying and other supporting operations such as pre-embedding; the needle beams provide the installation foundation and moving track; the steel plate laying support frame is used for steel plate laying, positioning support, and demolding; steel plate support demolding is an important process in the concrete construction of the chamber, and improper demolding may cause steel plate deformation or construction safety risks.

[0003] Currently, the hydraulic cylinders used for positioning and support (support cylinders) typically retract automatically after the concrete has solidified for a certain period of time to facilitate the demolding of the steel plate support. However, during the demolding process, if the cylinder malfunctions, it may cause the support cylinder to slow down or stop retracting, resulting in jamming. If the support cylinder is forcibly retracted for demolding, it may cause deformation of the steel plate or damage to the cylinder. At the same time, the chamber is an integral load-bearing structure. If the bond state of the concrete structure is poor and the stress is uneven, forcibly demolding a local support cylinder may also damage the overall bearing capacity of the chamber, thereby affecting the demolding effect. Summary of the Invention

[0004] To address the technical problem of poor demolding effect of embedded supports in concrete construction of air storage chambers, the present invention aims to provide a demolding device for embedded supports in concrete construction of air storage chambers. The specific technical solution adopted is as follows: An embedded support demolding device for concrete construction of an air storage chamber includes a device body, which comprises a steel plate laying support frame, a rebar tying frame, and a needle beam. The steel plate laying support frame also includes displacement sensors for collecting cylinder displacement, pressure sensors for collecting cylinder pressure, and a demolding control system installed within the support cylinders of each steel plate. The demolding control system controls the steel plate demolding based on the cylinder pressure and displacement of each support cylinder during each lining demolding process. The steel plate demolding sequence is sequential, starting from the top plate and proceeding in any rotational direction. Methods for controlling the demolding of steel plates include: The ability of the top plate to be demolded is assessed based on the cylinder pressure of each support cylinder. After the top plate begins to demold, the abnormal shrinkage coefficient of the top plate support cylinder is obtained based on the changing trend of the cylinder pressure and cylinder displacement of the top plate support cylinder, as well as the difference between the cylinder pressure and the corresponding preset pressure, in order to control the demolding of the top plate until the preset conditions are met and the demolding of the next adjacent steel plate begins. After the next adjacent steel plate begins demolding, the abnormal shrinkage coefficient of the support cylinder of the next adjacent steel plate is obtained based on the relationship between the displacement and pressure of the hydraulic cylinder during the demolding process of the top plate, so as to control the demolding; this process is repeated until all steel plates are demolded.

[0005] Furthermore, assessing whether the top plate can be demolded based on the cylinder pressure of each supporting cylinder includes: At each monitoring moment, the demolding reference index of the top plate is obtained based on the deviation of the cylinder pressure of each support cylinder from the corresponding preset pressure, and the difference between the cylinder pressures of the support cylinders of the symmetrical steel plates in the cross section of the chamber. When the demolding reference index is less than the preset value for a consecutive preset number of monitoring moments, it is determined that the top plate can be demolded.

[0006] Furthermore, the method for obtaining the demolding reference index includes: The first parameter is the sum of the deviations of the cylinder pressures of all supporting cylinders relative to the corresponding preset pressures; the difference between the cylinder pressures of the supporting cylinders of each pair of symmetrical steel plates is taken as the pressure symmetry deviation; the second parameter is obtained based on the difference between all pressure symmetry deviations and the corresponding preset deviations; the demolding reference index is obtained by combining the first parameter and the second parameter.

[0007] Furthermore, the method for obtaining the abnormal contraction coefficient of the top plate support cylinder includes: After the top plate begins demolding, at each monitoring moment, the cylinder pressure and cylinder displacement are used as the indicators to be analyzed, and the change curve of the indicator to be analyzed for each support cylinder during the corresponding historical demolding process is fitted; under each indicator to be analyzed, the normal change coefficient is obtained according to the change trend of the corresponding change curve of the top plate support cylinder. For each support cylinder, a pressure anomaly index is obtained based on the slope of the cylinder pressure change curve and the deviation of the pressure of each cylinder relative to the preset pressure. A displacement anomaly index is obtained based on the fluctuation characteristics of the cylinder displacement in the cylinder displacement change curve. At each monitoring moment, based on the normal variation coefficient, pressure anomaly index, and displacement anomaly index of the top plate support cylinder under each analytical index, and combined with the pressure anomaly index of the support cylinder corresponding to the left and right symmetrical steel plates in the chamber section, the abnormal contraction coefficient of the top plate support cylinder is calculated.

[0008] Furthermore, the method for obtaining the normal variation coefficient includes: For each index to be analyzed, the trend term and residual term in the corresponding change curve of the top plate support cylinder are obtained based on the STL decomposition algorithm. The reference error is obtained according to the deviation of the trend term relative to the corresponding change curve. The trend reference weight is obtained according to the deviation of the distribution characteristics of the residual term relative to the reference error. For each indicator to be analyzed, a linear trend parameter is obtained based on the concentrated characteristics of the instantaneous slope at all data points in the trend item corresponding to the top plate support cylinder; the linear trend parameter is weighted using the trend reference weight, and the normalized value of the weighted result is used as the normal change coefficient for the corresponding indicator to be analyzed.

[0009] Furthermore, the methods for obtaining the pressure anomaly index and the displacement anomaly index include: For each support cylinder, the normalized value of the overall slope of the cylinder pressure change curve is used as the first abnormal pressure parameter. The normalized value of the difference between the pressure of each cylinder and the preset pressure in the cylinder pressure change curve is averaged to obtain the second abnormal pressure parameter. The first abnormal pressure parameter and the second abnormal pressure parameter are combined to obtain the pressure abnormality index. For each support cylinder, the negative correlation mapping result of the mean value of the cylinder displacement change in the cylinder displacement change curve is used as the first abnormal displacement parameter, and the difference between the instantaneous slopes of the first and last cylinder displacements in the cylinder displacement change curve is used as the second abnormal displacement parameter; the first abnormal displacement parameter and the second abnormal displacement parameter are fused to obtain the displacement anomaly index.

[0010] Furthermore, the method for calculating the abnormal contraction coefficient of the top plate support cylinder includes: The negative correlation mapping result between the normal variation coefficient of the hydraulic cylinder pressure and the pressure anomaly index is used to obtain the first anomaly sub-parameter; the negative correlation mapping result between the normal variation coefficient of the hydraulic cylinder displacement and the displacement anomaly index is used to obtain the second anomaly sub-parameter; the first anomaly sub-parameter and the second anomaly sub-parameter are combined to obtain the abnormal contraction sub-parameter. At each monitoring moment, between each pair of left and right symmetrical steel plates corresponding to the supporting cylinders, the difference between the corresponding pressure anomaly indexes is used as the symmetry anomaly reference weight. The sum of the corresponding pressure anomaly indexes is weighted using the symmetry anomaly reference weight, and the weighted summation result of all pairs of left and right symmetrical steel plates corresponding to the supporting cylinders is used as the abnormal contraction reference weight. The abnormal contraction sub-parameters are weighted using the abnormal contraction reference weights, and the normalized value of the weighted result is used as the abnormal contraction coefficient of the top plate support cylinder.

[0011] Furthermore, methods for controlling the demolding of the top plate include: At each monitoring moment, if the abnormal contraction coefficient of the top plate support cylinder is less than a preset threshold, demolding is determined to be normal and demolding continues; otherwise, demolding is stopped.

[0012] Furthermore, the preset condition is that the top plate support cylinder reaches the preset contraction amount.

[0013] Furthermore, the method for obtaining the abnormal shrinkage coefficient of the support cylinder of the adjacent next steel plate to control demolding includes: Obtain the simulation curve showing the relationship between cylinder displacement and cylinder pressure for each steel plate during the simulated demolding process. For the top plate demolding cylinder, the relationship curve between cylinder displacement and cylinder pressure during the demolding process of the top plate is fitted. Based on the DTW matching result between the relationship curve and the simulation relationship curve, and the abnormal shrinkage coefficient at each monitoring time, the simulation error is obtained. After the next adjacent steel plate begins demolding, at each monitoring time, the historical change relationship curve between the cylinder displacement and cylinder pressure of the support cylinder during the demolding process of the steel plate is fitted. Based on the DTW matching result of the historical change relationship curve and the corresponding simulation change relationship curve at the corresponding monitoring time and the simulation error, the abnormal contraction coefficient of the support cylinder of the next adjacent steel plate is obtained. At each monitoring moment, if the abnormal contraction coefficient of the support cylinder of the next adjacent steel plate is less than the preset threshold, the demolding is determined to be normal and demolding continues; otherwise, demolding is stopped.

[0014] The present invention has the following beneficial effects: This invention incorporates additional sensors and a demolding control system within the steel plate laying support frame. By monitoring and analyzing the cylinder pressure of each support cylinder, it assesses whether the top plate can be demolded. After demolding begins, it analyzes the changing trends of the cylinder pressure and displacement of the top plate support cylinders, as well as the difference between the cylinder pressure and the corresponding preset pressure, to obtain the abnormal contraction coefficient of the top plate support cylinders and control the demolding process. Then, after the next adjacent steel plate begins demolding, it controls the demolding of the steel plate based on the relationship between the cylinder displacement and cylinder pressure during the demolding process. This process is iterated until all steel plates are demolded. By monitoring and analyzing the changes in cylinder pressure and displacement of the support cylinders corresponding to each steel plate, this invention assesses the possibility of abnormal jamming during the demolding process and evaluates whether there is abnormal contraction due to forced demolding, thereby effectively controlling the contraction of the support cylinders and improving the demolding effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A side view of a pre-embedded support demolding device for concrete construction of an air storage chamber, provided in an embodiment of the present invention; Figure 2This is a front view of a steel plate laying support frame provided in one embodiment of the present invention; Figure 3 This is a flowchart of a steel plate demolding control method provided in one embodiment of the present invention; Figure 4 This is a flowchart illustrating a method for obtaining the abnormal contraction coefficient of a top plate support cylinder, as provided in one embodiment of the present invention. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a pre-embedded support demolding device for concrete construction of an air storage chamber according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0019] The following description, in conjunction with the accompanying drawings, details a specific scheme for a pre-embedded support demolding device for concrete construction of an air storage chamber provided by the present invention.

[0020] Please see Figure 1 The illustration shows a side view of a pre-embedded support demolding device for concrete construction of an air storage chamber according to an embodiment of the present invention; the device is also a steel plate laying and rebar binding needle beam trolley device, including a steel plate laying support frame, a rebar binding frame and needle beams.

[0021] The air chamber employs a novel lining construction process. During lining, a layer of steel plate is laid and fixed on the inner surface of the chamber to provide a seal. This trolley device was specifically developed and designed for air chamber lining construction, solving technical challenges such as the laying and fixing of sealing steel plates in air storage chambers, and significantly improving the construction efficiency of chamber lining.

[0022] It should be noted that, in one embodiment of the present invention, a full circular chamber is used as an example. The steel plate laying and rebar binding needle beam trolley device can only carry out lining construction on a section of the full circular chamber at a time. The analysis and control method of each lining demolding process is the same. Here, only any lining demolding process of the full circular chamber is analyzed and described.

[0023] The rebar tying platform is responsible for tying the rebar in the entire circular chamber and assists in the supporting work of secondary lining construction, such as the pre-embedding of structural components. It includes 5 working platforms, of which the lower 4 are telescopic platforms and the top one is a step platform, which can cover the entire cross-section of the circular chamber to meet the work requirements. The rebar tying platform is installed on the top track of the needle beam through a suspension structure, and the hydraulic motor is connected to the track drive system to ensure that it can move independently. The steel plate laying support frame is responsible for the laying, supporting, positioning, and demolding of the steel plates (concrete pouring formwork), and is a core component in the secondary lining construction; please refer to [link / reference]. Figure 2 This document shows a front view of a steel plate laying support platform according to an embodiment of the present invention. The steel plate laying support platform lays steel plates with an inner radius of R7500mm to match the cross-sectional shape of the full-circle chamber, ensuring the curvature accuracy of the steel plate laying. The positioning (fitting the design position) and demolding (separation from the poured concrete) of the steel plates are controlled by a support cylinder. It can also be used in conjunction with a rebar tying platform to complete the sealing of the secondary lining ends. The steel plate laying support platform and the needle beam are assembled through a connecting structure, with a reserved winch traction interface between them. The winch can pull the steel plate laying support platform and the needle beam to move relative to each other. The needle beam is the core load-bearing and guiding structure of the trolley. The rebar binding platform and steel plate laying support platform are suspended on the needle beam track and can move independently, providing support for parallel operations of multiple processes to meet the segmented construction of the full-circle chamber. By adjusting the lifting cylinders and translation cylinders on the needle beam, the needle beam can be precisely aligned with the chamber cross-section. The needle beam is also equipped with a rotatable boom.

[0024] Based on the above-mentioned device, this embodiment of the invention additionally installs several sensors and a demolding control module within the steel plate laying support frame of the device; specifically, a displacement sensor for collecting cylinder displacement and a pressure sensor for collecting cylinder pressure are installed in each steel plate support cylinder; all sensors collect data synchronously after concrete pouring, and the sensor acquisition frequency is set to once every 10 seconds; the implementer can also adjust the acquisition frequency according to the specific implementation situation, for example, once every 10 minutes in the early stage of pouring, and once every 10 seconds in the later stage; the demolding control system is used to receive the support cylinder data collected by each sensor, and at the same time, during the lining demolding process, controls the demolding of the steel plate according to the cylinder pressure and cylinder displacement of each support cylinder.

[0025] It should be noted that a steel plate in a circular chamber may be supported and positioned by one or more support cylinders. In one embodiment of the present invention, a steel plate is supported and positioned by one support cylinder as an example for analysis and description. In other embodiments, when a steel plate corresponds to multiple support cylinders, a comprehensive analysis can be performed by averaging or weighted averaging, and the specific process will not be described in detail.

[0026] The demolding sequence of the steel plates is to demold them sequentially from the top plate (top steel plate) in any rotation direction; in one embodiment of the present invention, the rotation direction is clockwise; since the full circular chamber can be regarded as a circular ring force-bearing structure, demolding the top plate first can reduce the pressure on other steel plates, and then demolding them sequentially can maintain the force balance of the chamber lining structure during the demolding process, and maximize the construction safety and lining quality.

[0027] Please see Figure 3 The diagram illustrates a flowchart of a steel plate demolding control method according to an embodiment of the present invention, which specifically includes: Step S1: Assess whether the top plate can be demolded based on the cylinder pressure of each support cylinder. After the top plate begins demolding, obtain the abnormal contraction coefficient of the top plate support cylinder based on the changing trend of the cylinder pressure and cylinder displacement of the top plate support cylinder, as well as the difference between the cylinder pressure and the corresponding preset pressure, to control the demolding of the top plate until the preset conditions are met, and start the demolding of the next adjacent steel plate.

[0028] Considering that demolding can only be carried out after the concrete has solidified to a certain strength, but testing the concrete strength at each location in the lining section of the circular chamber is time-consuming and labor-intensive; and considering that after the concrete solidifies, the corresponding lining section of the circular chamber should be a static force-balanced system, and the static bond force of the concrete to the corresponding steel plate should reach an ideal state, that is, solidify to an ideal state, so as to facilitate demolding; and the cylinder pressure of the hydraulic cylinder corresponding to each steel plate reflects the static bond force of the concrete to the steel plate; Therefore, in this embodiment of the invention, before demolding begins, the hydraulic pressure of the hydraulic cylinder supporting each steel plate in the circular chamber is collected in real time by a pressure sensor, thereby assessing the static bonding force of the concrete to the corresponding steel plate and the stress assessment state, and assessing whether demolding can be carried out (the top plate is demolded first).

[0029] It should be noted that the data collected by each sensor in the embodiments of the present invention need to be standardized by removing dimensions, etc., for subsequent calculations.

[0030] At each monitoring moment, the greater the deviation of the hydraulic cylinder pressure of the support cylinder from the preset pressure, the better the solidification effect of the concrete under the corresponding steel plate is, and demolding is not advisable at the moment. Furthermore, in the cross-section of the chamber (lining section), a vertical axis is drawn through the center of the chamber cross-section, which can determine that the stress state of each pair of left and right symmetrical steel plates should be consistent, and the difference in hydraulic cylinder pressure of the corresponding support cylinder should also be small. If the difference is large, it indicates that there may be local uneven stress, and forced demolding may affect the stability of the lining structure. Based on this, in a preferred embodiment of the present invention, at each monitoring moment, a demolding reference index for the top plate is obtained based on the deviation of the cylinder pressure of each supporting cylinder from the corresponding preset pressure, and the difference between the cylinder pressures of the supporting cylinders of the symmetrical steel plates in the cross-section of the chamber. When the demolding reference index is less than a preset value for a consecutive preset number of monitoring moments, it is determined that the top plate can be demolded. The method for obtaining the demolding reference index includes: The first parameter is the sum of the deviations of the cylinder pressures of all supporting cylinders relative to the corresponding preset pressures; the difference between the cylinder pressures of the supporting cylinders of each pair of symmetrical steel plates is taken as the pressure symmetry deviation; the second parameter is obtained based on the difference between all pressure symmetry deviations and the corresponding preset deviations; the demolding reference index is obtained by combining the first parameter and the second parameter.

[0031] It should be noted that when the concrete reaches the ideal strength, the lining section is simulated. Based on the simulation results, the simulated pressure, i.e. the preset pressure, of each steel plate corresponding to the supporting cylinder can be obtained. Then, the absolute value of the difference between the preset pressures of each pair of symmetrical steel plates corresponding to the supporting cylinders can be used as the preset deviation. Implementers can also calculate the preset pressure through theoretical analysis. Both the calculation of the preset pressure and the simulation of the preset pressure of each supporting cylinder are existing technologies and will not be elaborated further.

[0032] As an example, the difference between the cylinder pressure of each support cylinder and the corresponding preset pressure is mapped to the ReLU function to adjust the value range. The sum of the mapped values ​​corresponding to all support cylinders is used as the first parameter. The difference is represented by the absolute value of the difference. Between each pair of symmetrical steel plates, the absolute value of the difference between the cylinder pressures of the corresponding support cylinders is used as the pressure symmetry deviation. The sum of the absolute values ​​of the difference between the pressure symmetry deviation and the preset deviation between each pair of symmetrical steel plates is used as the second parameter. The sum of the first parameter and the second parameter is used as the demolding reference index of the top plate. The closer the demolding reference index is to 0, the more suitable it is for demolding. When the demolding reference index is less than the preset value, such as 0.1, for a consecutive preset number of monitoring times, the suitable demolding conditions are determined to be met, and the demolding of the top plate can begin.

[0033] In other examples, implementers can also adjust the preset quantity and preset value themselves.

[0034] After the top slab begins demolding, the top slab support cylinders will automatically retract to help separate the steel plate from the concrete and facilitate the demolding of the top slab. Specifically, a flow control method is used to control the automatic uniform speed retraction of each support cylinder (not a fixed power). During the retraction process, the cylinder will prioritize maintaining a constant speed, so that the cylinder pressure will automatically change with the external resistance. It should be noted that flow control support cylinders are existing technologies well known to those skilled in the art and will not be described in detail here.

[0035] Under ideal demolding conditions, the top plate can be easily separated from the top concrete. Specifically, the hydraulic cylinder pressure rises slightly in a short period of time to overcome the slight adhesion force, and then the top plate is completely separated from the concrete. The top plate support hydraulic cylinder mainly overcomes the weight of the top plate. The hydraulic cylinder pressure changes evenly, and the hydraulic cylinder displacement changes linearly with time until the demolding is in place and then shrinkage stops. However, during actual demolding, uneven application of the release agent or concrete segregation may result in significant adhesion between the steel plate and the concrete, preventing the top plate support cylinder from contracting properly. If forced demolding is attempted, the cylinder pressure will gradually increase to counteract adhesion until a critical value is reached, at which point the adhesion force disappears instantly, and the cylinder pressure drops sharply to a low value that only overcomes the weight of the top plate. Subsequently, the cylinder pressure changes uniformly, and the cylinder displacement changes linearly over time until demolding is complete and contraction stops. Simultaneously, if the support cylinder becomes abnormally jammed due to blockages in the oil circuit or wear and deformation, the top plate support cylinder will also fail to contract properly; specifically, the cylinder displacement will remain unchanged regardless of pressure changes. Based on the aforementioned characteristics of the change in cylinder pressure and cylinder displacement, this embodiment of the invention will obtain the abnormal contraction coefficient of the top plate support cylinder according to the changing trend of the cylinder pressure and cylinder displacement of the top plate support cylinder, as well as the difference between the cylinder pressure and the corresponding preset pressure, in order to control the demolding of the top plate until the preset conditions are met, and then begin the demolding of the next adjacent steel plate.

[0036] Among them, the abnormal shrinkage coefficient of the top plate support cylinder reflects whether the top plate support cylinder can shrink normally during the actual demolding process of the top plate; it not only reflects whether the support cylinder is abnormally blocked, but also reflects whether there is a large adhesion between the top plate and the concrete that makes demolding difficult, thus preparing for subsequent control of the normal shrinkage of the top plate support cylinder to demold the top plate.

[0037] Preferably, in one embodiment of the present invention, the method for obtaining the abnormal contraction coefficient of the top plate support cylinder includes: Please see Figure 4 The diagram illustrates a flowchart of a method for obtaining the abnormal contraction coefficient of a top plate support cylinder according to an embodiment of the present invention, specifically including: Step S101: After the top plate begins demolding, at each monitoring moment, the cylinder pressure and cylinder displacement are used as the indicators to be analyzed, and the change curve of the indicator to be analyzed for each support cylinder during the corresponding historical demolding process is fitted; under each indicator to be analyzed, the normal change coefficient is obtained according to the change trend of the corresponding change curve of the top plate support cylinder.

[0038] Considering that after the top plate begins demolding, in order to facilitate the analysis of whether the hydraulic cylinder pressure and displacement change normally, that is, whether they conform to the change characteristics under the ideal demolding state, in one embodiment of the present invention, the hydraulic cylinder pressure and displacement are analyzed as indicators to be analyzed in turn; at each monitoring time, for each support hydraulic cylinder, the change curve of each indicator to be analyzed during the historical demolding process (from the start of demolding to the corresponding time period of the monitoring time) at that monitoring time is fitted based on the least squares method; the fitted curve is already existing technology and will not be described in detail here.

[0039] Considering that when the variation curve of the top plate support cylinder under each index to be analyzed is more in line with the variation trend characteristics of the ideal demolding, the normal variation coefficient at that monitoring time is larger, the contraction state of the top plate support cylinder is more ideal and normal, and the demolding effect is better; Furthermore, considering that the Time Series Decomposition algorithm (STL) can decompose a time series or curve into a trend term, a seasonal term, and a residual term, the trend term reflects the overall trend or change pattern of the indicator under analysis over a long period of time, while the residual term reflects information such as random noise or outliers, which indirectly reflects the trend reference value of the change curve; at the same time, the instantaneous slope of the data points in the change curve can reflect the local change characteristics, and the concentration of the local change characteristics at all data points can help assess whether the change characteristics of the change curve conform to the characteristics of uniform or linear change, so that the normal change coefficient can be evaluated in combination with the trend reference value. Based on this, in a preferred embodiment of the present invention, the method for obtaining the normal variation coefficient includes: For each index to be analyzed, the trend term and residual term in the corresponding change curve of the top plate support cylinder are obtained based on the STL decomposition algorithm. The reference error is obtained based on the deviation of the trend term relative to the corresponding change curve. The trend reference weight is obtained based on the deviation of the distribution characteristics of the residual term relative to the reference error. For each indicator to be analyzed, linear trend parameters are obtained based on the concentrated characteristics of the instantaneous slopes at all data points in the trend item corresponding to the top plate support cylinder. The linear trend parameters are weighted using trend reference weights, and the normalized value of the weighted result is used as the normal variation coefficient for the corresponding indicator to be analyzed.

[0040] As an example, we will analyze and describe the hydraulic cylinder pressure to obtain the normal variation coefficient of the hydraulic cylinder pressure. Specifically, the trend term and residual term in the cylinder pressure change curve are extracted based on the STL decomposition algorithm, which is an existing technology and will not be elaborated further. Then, the mean of the absolute values ​​of the differences between all data points at the same monitoring time is used as the reference error between the trend term and the cylinder pressure change curve. Furthermore, the distribution characteristics are measured by the mean, and the absolute value of the difference between the mean of all data points of the residual term and the reference error is negatively correlated and mapped to 1-tanh(x). The mapping result is used as the trend reference weight. The smaller the absolute value of the difference, the better the trend term extraction effect. Then, in the trend term of the cylinder pressure change curve, the instantaneous slope at each data point is obtained by function differentiation, or the instantaneous slope at each data point can be calculated based on a two-point formula, both of which are existing technologies and will not be elaborated further. Then, the standard deviation is used to measure the features in the set, and the standard deviation of all instantaneous slopes is mapped to 1-tanh(x). The logic is adjusted, and the mapping result is used as the linear trend parameter. This makes the smaller the standard deviation, the more similar and close the instantaneous slopes are, and the more they conform to the uniform change characteristics in the ideal demolding process. Finally, the trend reference weight is multiplied by the linear trend parameter. Since the value range of the two multiplication factors is 0-1, the product can be directly used as the normal change coefficient of the cylinder pressure.

[0041] The process for analyzing and obtaining the normal variation coefficient of the hydraulic cylinder displacement is similar and will not be repeated here.

[0042] Step S102: For each support cylinder, obtain the pressure anomaly index based on the slope of the cylinder pressure change curve and the deviation of the pressure of each cylinder relative to the preset pressure; obtain the displacement anomaly index based on the fluctuation characteristics of the cylinder displacement in the cylinder displacement change curve.

[0043] Considering that the cylinder pressure continues to increase and the deviation from the preset pressure is getting larger and larger, it indicates that the pressure may be increasing due to overcoming adhesion or cylinder jamming, which increases the possibility of an anomaly. Furthermore, considering that the cylinder displacement should change at a uniform speed, the greater the fluctuation in cylinder displacement, the more uneven the displacement change, which increases the possibility of an anomaly. Based on this, in a preferred embodiment of the present invention, the method for obtaining the pressure anomaly index and the displacement anomaly index includes: For each support cylinder, the normalized value of the overall slope of the cylinder pressure change curve is used as the first abnormal pressure parameter. The normalized value of the difference between the pressure of each cylinder and the preset pressure in the cylinder pressure change curve is averaged to obtain the second abnormal pressure parameter. The first abnormal pressure parameter and the second abnormal pressure parameter are combined to obtain the pressure abnormality index. For each support cylinder, the negative correlation mapping result of the mean value of the cylinder displacement change in the cylinder displacement change curve is used as the first abnormal displacement parameter, and the difference between the instantaneous slopes of the first and last cylinder displacements in the cylinder displacement change curve is used as the second abnormal displacement parameter; the first abnormal displacement parameter and the second abnormal displacement parameter are fused to obtain the displacement anomaly index.

[0044] As an example, taking any supporting hydraulic cylinder as an example, the overall slope of the hydraulic cylinder pressure change curve is calculated based on a two-point method. The overall slope is mapped to the tanh function and the range is adjusted to 0-1 to avoid negative slope values ​​affecting subsequent calculations. The mapped value is used as the first abnormal pressure parameter, so that the larger the overall slope, the more abnormal the hydraulic cylinder pressure is. The difference between the pressure of each hydraulic cylinder and the preset pressure in the hydraulic cylinder pressure change curve is mapped to the ReLU function and the range is adjusted to 0-1. The average of all the difference mapping results is used to obtain the second abnormal pressure parameter. Finally, the first abnormal pressure parameter and the second abnormal pressure parameter are multiplied, and the product is used as the pressure abnormality index. The mean value of the change in displacement between adjacent cylinders in the cylinder displacement change curve is mapped to a negative exponential function exp(-x) with the natural constant e as the base. The function value is used as the first abnormal displacement parameter. The smaller or constant the change in cylinder displacement, the more likely the cylinder is to be stuck, and the larger the first abnormal displacement parameter is. The instantaneous slope at each data point in the cylinder displacement change curve is obtained by taking the derivative of the function. The absolute value of the difference between the instantaneous slopes of the first and last cylinders in the cylinder displacement change curve is used as the second abnormal displacement parameter. The larger the difference between the instantaneous slopes of the first and last cylinders, the more uneven the displacement change is, and the less it conforms to the uniform extension and retraction characteristics of the cylinder, the larger the second abnormal displacement parameter is. Finally, the first and second abnormal displacement parameters are multiplied, and the product is used as the displacement anomaly index.

[0045] The pressure anomaly index and displacement anomaly index further reflect the abnormal shrinkage of the support cylinder during the demolding process of the top plate, preparing for a comprehensive evaluation of the abnormal shrinkage coefficient of the top plate support cylinder.

[0046] Step S103: At each monitoring time, based on the normal variation coefficient, pressure anomaly index, and displacement anomaly index of the top plate support cylinder under each analytical index, and combined with the pressure anomaly index of the support cylinder corresponding to the left and right symmetrical steel plates in the chamber section, calculate the abnormal contraction coefficient of the top plate support cylinder.

[0047] Considering that for the top plate support cylinder, the normal variation coefficient of cylinder pressure, the normal variation coefficient of cylinder displacement, the pressure anomaly index, and the displacement anomaly index reflect whether the expansion and contraction of the top plate support cylinder are abnormal from different angles; and considering that when the pressure anomaly index of the support cylinder corresponding to the symmetrical steel plates in the cross-section of the chamber is larger and the deviation between them is larger, it indicates that the chamber is under unbalanced force, and demolding should not continue at this time; based on this, the abnormal contraction coefficient of the top plate support cylinder can be calculated.

[0048] In a preferred embodiment of the present invention, the method for calculating the abnormal contraction coefficient of the top plate support cylinder includes: The first abnormal sub-parameter is obtained by integrating the negative correlation mapping results of the normal variation coefficient of the hydraulic cylinder pressure and the pressure abnormality index; the second abnormal sub-parameter is obtained by integrating the negative correlation mapping results of the normal variation coefficient of the hydraulic cylinder displacement and the displacement abnormality index; and the abnormal contraction sub-parameter is obtained by integrating the first abnormal sub-parameter and the second abnormal sub-parameter. At each monitoring moment, the difference between the corresponding pressure anomaly indices between each pair of left and right symmetrical steel plates and their corresponding support cylinders is used as the symmetry anomaly reference weight. The sum of the corresponding pressure anomaly indices is weighted using the symmetry anomaly reference weight, and the weighted sum of all pairs of left and right symmetrical steel plates and their corresponding support cylinders is used as the abnormal contraction reference weight. The abnormal contraction sub-parameters are weighted using abnormal contraction reference weights, and the normalized value of the weighted result is used as the abnormal contraction coefficient of the top plate support cylinder.

[0049] As an example, the abnormal pressure index of the top plate support cylinder is specifically mapped to a negative exponential function exp(-x) with the natural constant e as the base. The logical relationship is adjusted, and then the function value is multiplied and combined with the normal variation coefficient of the cylinder pressure of the top plate support cylinder to obtain the first abnormal sub-parameter. The second abnormal sub-parameter can be calculated based on the same calculation method. Then, the first abnormal sub-parameter and the second abnormal sub-parameter are multiplied, and the product is used as the abnormal contraction sub-parameter. Then, between the corresponding support cylinders of each pair of symmetrical steel plates, the absolute value of the difference between the corresponding pressure anomaly indices is used as the symmetry anomaly reference weight; then, the sum of the corresponding pressure anomaly indices is weighted using the symmetry anomaly reference weight, and the weighted sum of all the corresponding support cylinders of the symmetrical steel plates is used as the abnormal shrinkage reference weight. The larger the abnormal shrinkage reference weight, the greater the impact of the demolding of the top plate on the stress of the symmetrical steel plates, resulting in a greater degree of stress imbalance in the entire chamber, and a greater possibility of abnormal shrinkage of the top plate support cylinders. Finally, the abnormal contraction reference weight is multiplied by the abnormal contraction sub-parameter, the product is mapped to the tanh function and the range is adjusted to 0-1. The mapped value is used as the abnormal contraction coefficient of the top plate support cylinder.

[0050] During the demolding process of the top plate, after obtaining the abnormal contraction coefficient of the top plate support cylinder at each monitoring moment, the demolding of the top plate can be further controlled until the preset conditions are met, and the demolding of the next adjacent steel plate can begin.

[0051] Preferably, in one embodiment of the present invention, the method for controlling the demolding of the top plate includes: at each monitoring moment, when the abnormal contraction coefficient of the top plate support cylinder is less than a preset threshold, it is determined that the demolding is normal and demolding continues; otherwise, demolding is stopped. The preset threshold is set to 0.1, which can be adjusted by the implementer, but should not be too large. After demolding is stopped, relevant personnel can be alerted to intervene in maintenance or fine-tuning of the device to ensure smooth demolding.

[0052] Preferably, in one embodiment of the present invention, the preset condition is that the top plate support cylinder reaches a preset contraction amount, such as 90% of the cylinder extension stroke.

[0053] Once the demolding of the top plate meets the preset conditions, the demolding of the next adjacent steel plate can begin.

[0054] Step S2: After the next adjacent steel plate begins demolding, the abnormal shrinkage coefficient of the support cylinder of the next adjacent steel plate is obtained according to the relationship between the displacement and pressure of the cylinder during the demolding process of the top plate, so as to control the demolding; this process is iterated until all steel plates are demolded.

[0055] Considering the relationship between the displacement and pressure of the hydraulic cylinder during the demolding process of the top plate, relevant demolding references can be provided for subsequent steel plates. This allows for the assessment of the abnormal shrinkage coefficient of the support cylinder of the next adjacent steel plate during the demolding process, thus controlling the demolding process.

[0056] Preferably, in one embodiment of the present invention, considering that during the demolding of the top plate and other steel plates, the cylinder pressure and displacement of the corresponding support cylinder should have similar overall change characteristics; however, at each monitoring moment during the demolding process of the next adjacent steel plate, the specific changes in cylinder pressure and displacement may not be completely synchronized, and the demolding process duration is not consistent. The DTW algorithm can effectively measure the difference in change, thereby accurately assessing the abnormal shrinkage coefficient of the support cylinder of the steel plate; therefore, the method for obtaining the abnormal shrinkage coefficient of the support cylinder of the next adjacent steel plate to control demolding includes: Obtain the simulation curve showing the relationship between cylinder displacement and cylinder pressure for each steel plate during the simulated demolding process. For the top plate demolding cylinder, the relationship curve between cylinder displacement and cylinder pressure during the demolding process of the top plate is fitted. Based on the DTW matching result between the relationship curve and the simulation relationship curve, and the abnormal shrinkage coefficient at each monitoring time, the simulation error is obtained. After the next adjacent steel plate begins demolding, at each monitoring time, the historical change relationship curve between the cylinder displacement and cylinder pressure of the support cylinder during the demolding process of the steel plate is fitted. The difference between the historical change relationship curve and the corresponding simulated change relationship curve at the corresponding monitoring time DTW matching result is subtracted from the normalized result of the simulation error, and used as the abnormal shrinkage coefficient of the support cylinder of the next adjacent steel plate. At each monitoring moment, if the abnormal contraction coefficient of the support cylinder of the next adjacent steel plate is less than the preset threshold, the demolding is determined to be normal and demolding continues; otherwise, demolding is stopped.

[0057] As an example, we first use simulation software to fit the simulation change curve between the cylinder displacement and cylinder pressure of the top plate demolding cylinder during the ideal demolding process of each steel plate. The simulation change curve reflects the demolding state under the ideal condition, where the cylinder displacement is the horizontal axis parameter and the cylinder pressure is the vertical axis parameter. Similarly, based on the least squares method to fit the curve of the change relationship between the cylinder displacement and cylinder pressure of the top plate demolding cylinder during the demolding process, the change relationship curve of the top plate demolding cylinder is matched with the simulated change relationship curve by DTW. The DTW distance reflects the overall deviation of the change relationship curve during the actual demolding process, providing a certain deviation reference for the demolding of other steel plates in the future. Then, by dividing the DTW distance by the abnormal contraction coefficient of the top plate support cylinder at the corresponding monitoring time, the simulation error at the corresponding monitoring time can be obtained. Then, during the demolding process of the next adjacent steel plate, at each monitoring time, the historical change relationship curve between the cylinder displacement and cylinder pressure of the support cylinder during the historical demolding process (the period from the start of demolding of the steel plate to the monitoring time) is fitted. Similarly, the historical change relationship curve is matched with the simulation change relationship curve by DTW. Then, the absolute value of the difference between the data point of the monitoring time in the historical change relationship curve and the corresponding matching point in the simulation change curve of the steel plate can be obtained, which is the matching deviation. Then, the matching deviation can be divided by the simulation error to obtain the abnormal expansion coefficient of the support cylinder of the next adjacent steel plate at the monitoring time. Furthermore, at each monitoring moment, if the abnormal contraction coefficient of the support cylinder of the next adjacent steel plate is less than the preset threshold, it is determined that demolding is normal and demolding continues; otherwise, demolding is stopped. The preset threshold is set to 0.1, which can be adjusted by the implementer, but should not be too large. After demolding is stopped, relevant personnel can be alerted to intervene in maintenance or fine-tuning of the device to ensure smooth demolding.

[0058] Once the steel plate meets the preset conditions (demolding complete), the demolding of the next steel plate can begin; this process is repeated until all steel plates are demolded. It should be noted that the demolding process for each non-top plate is the same, and will not be described in detail here.

[0059] It should be noted that the de-simulation simulation, least squares method, DTW matching, and DTW distance calculation are all existing technologies and will not be elaborated further.

[0060] In summary, this invention incorporates additional sensors and a demolding control system within the steel plate laying support frame. By monitoring and analyzing the cylinder pressure of each support cylinder, it assesses whether the top plate can be demolded. During the demolding process, it analyzes the changes in cylinder pressure and displacement of the top plate support cylinders in real time to obtain the abnormal contraction coefficient of the top plate support cylinders, thereby controlling demolding. Then, after the next adjacent steel plate begins demolding, it controls the demolding of the steel plate based on the relationship between the cylinder displacement and cylinder pressure during the top plate demolding process. This process is iterated until all steel plates are demolded. By monitoring and analyzing the changes in cylinder pressure and displacement of the support cylinders corresponding to each steel plate, this invention assesses the possibility of abnormal jamming during demolding and evaluates whether there is forced abnormal contraction, thereby effectively controlling the contraction of the support cylinders and improving the demolding effect.

[0061] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0062] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

Claims

1. A pre-embedded support demolding device for air energy storage cavern concrete construction, comprising a device body, the device body comprising a steel plate laying support rack, a steel bar binding rack and a needle beam, characterized in that, The steel plate laying support frame also includes a displacement sensor for collecting cylinder displacement, a pressure sensor for collecting cylinder pressure, and a demolding control system installed in each steel plate support cylinder. The demolding control system is used to control the demolding of the steel plate according to the cylinder pressure and cylinder displacement of each support cylinder during each lining demolding process. The demolding sequence of the steel plates is to demold sequentially from the top plate along any rotation direction; Methods for controlling the demolding of steel plates include: The ability of the top plate to be demolded is assessed based on the cylinder pressure of each support cylinder. After the top plate begins to demold, the abnormal shrinkage coefficient of the top plate support cylinder is obtained based on the changing trend of the cylinder pressure and cylinder displacement of the top plate support cylinder, as well as the difference between the cylinder pressure and the corresponding preset pressure, in order to control the demolding of the top plate until the preset conditions are met and the demolding of the next adjacent steel plate begins. After the next adjacent steel plate begins demolding, the abnormal contraction coefficient of the support cylinder of the next adjacent steel plate is obtained based on the relationship between the displacement and pressure of the hydraulic cylinder during the demolding process of the top plate, so as to control the demolding; this process is repeated until all steel plates are demolded.

2. The pre-embedded support demolding device for concrete construction of air storage chambers according to claim 1, characterized in that, The ability of the top plate to be demolded is assessed based on the hydraulic pressure of each supporting cylinder, including: At each monitoring moment, based on the deviation of the cylinder pressure of each support cylinder from the corresponding preset pressure, and the difference between the cylinder pressures of the support cylinders of the symmetrical steel plates in the cross-section of the chamber, the demolding reference index of the top plate is obtained; when the demolding reference index of a consecutive preset number of monitoring moments is less than the preset value, it is determined that the top plate can be demolded.

3. The pre-embedded support demolding device for concrete construction of air storage chambers according to claim 2, characterized in that, The method for obtaining the demolding reference index includes: The first parameter is the sum of the deviations of the cylinder pressures of all supporting cylinders relative to the corresponding preset pressures; the difference between the cylinder pressures of the supporting cylinders of each pair of symmetrical steel plates is taken as the pressure symmetry deviation; the second parameter is obtained based on the difference between all pressure symmetry deviations and the corresponding preset deviations; the demolding reference index is obtained by combining the first parameter and the second parameter.

4. The pre-embedded support demolding device for concrete construction of air storage chambers according to claim 1, characterized in that, Methods for obtaining the abnormal contraction coefficient of the top plate support cylinder include: After the top plate begins demolding, at each monitoring moment, the cylinder pressure and cylinder displacement are used as the indicators to be analyzed, and the change curve of the indicator to be analyzed for each support cylinder during the corresponding historical demolding process is fitted; under each indicator to be analyzed, the normal change coefficient is obtained according to the change trend of the corresponding change curve of the top plate support cylinder. For each supporting cylinder, a pressure anomaly index is obtained based on the slope of the cylinder pressure change curve and the deviation of the pressure of each cylinder relative to the preset pressure. A displacement anomaly index is obtained based on the fluctuation characteristics of the cylinder displacement in the cylinder displacement change curve. At each monitoring moment, based on the normal variation coefficient, pressure anomaly index, and displacement anomaly index of the top plate support cylinder under each analytical index, and combined with the pressure anomaly index of the support cylinder corresponding to the left and right symmetrical steel plates in the chamber section, the abnormal contraction coefficient of the top plate support cylinder is calculated.

5. The pre-embedded support demolding device for concrete construction of an air storage chamber according to claim 4, characterized in that, The method for obtaining the normal variation coefficient includes: For each index to be analyzed, the trend term and residual term in the corresponding change curve of the top plate support cylinder are obtained based on the STL decomposition algorithm. The reference error is obtained according to the deviation of the trend term relative to the corresponding change curve. The trend reference weight is obtained according to the deviation of the distribution characteristics of the residual term relative to the reference error. For each indicator to be analyzed, a linear trend parameter is obtained based on the concentrated characteristics of the instantaneous slope at all data points in the trend item corresponding to the top plate support cylinder; the linear trend parameter is weighted using the trend reference weight, and the normalized value of the weighted result is used as the normal change coefficient for the corresponding indicator to be analyzed.

6. The pre-embedded support demolding device for concrete construction of an air storage chamber according to claim 4, characterized in that, The methods for obtaining the pressure anomaly index and the displacement anomaly index include: For each support cylinder, the normalized value of the overall slope of the cylinder pressure change curve is used as the first abnormal pressure parameter. The normalized value of the difference between the pressure of each cylinder and the preset pressure in the cylinder pressure change curve is averaged to obtain the second abnormal pressure parameter. The first abnormal pressure parameter and the second abnormal pressure parameter are combined to obtain the pressure abnormality index. For each support cylinder, the negative correlation mapping result of the mean value of the cylinder displacement change in the cylinder displacement change curve is used as the first abnormal displacement parameter, and the difference between the instantaneous slopes of the first and last cylinder displacements in the cylinder displacement change curve is used as the second abnormal displacement parameter; the first abnormal displacement parameter and the second abnormal displacement parameter are fused to obtain the displacement anomaly index.

7. The pre-embedded support demolding device for concrete construction of an air storage chamber according to claim 4, characterized in that, The method for calculating the abnormal contraction coefficient of the top plate support cylinder includes: The negative correlation mapping result between the normal variation coefficient of the hydraulic cylinder pressure and the pressure anomaly index is used to obtain the first anomaly sub-parameter; the negative correlation mapping result between the normal variation coefficient of the hydraulic cylinder displacement and the displacement anomaly index is used to obtain the second anomaly sub-parameter; the first anomaly sub-parameter and the second anomaly sub-parameter are combined to obtain the abnormal contraction sub-parameter. At each monitoring moment, between each pair of left and right symmetrical steel plates corresponding to the supporting cylinders, the difference between the corresponding pressure anomaly indexes is used as the symmetry anomaly reference weight. The sum of the corresponding pressure anomaly indexes is weighted using the symmetry anomaly reference weight, and the weighted summation result of all pairs of left and right symmetrical steel plates corresponding to the supporting cylinders is used as the abnormal contraction reference weight. The abnormal contraction sub-parameters are weighted using the abnormal contraction reference weights, and the normalized value of the weighted result is used as the abnormal contraction coefficient of the top plate support cylinder.

8. The pre-embedded support demolding device for concrete construction of an air storage chamber according to claim 1, characterized in that, Methods for controlling the demolding of the top plate include: At each monitoring moment, if the abnormal contraction coefficient of the top plate support cylinder is less than a preset threshold, demolding is determined to be normal and demolding continues; otherwise, demolding is stopped.

9. The pre-embedded support demolding device for concrete construction of an air storage chamber according to claim 1, characterized in that, The preset condition is that the top plate support cylinder reaches the preset retraction amount.

10. The pre-embedded support demolding device for concrete construction of an air storage chamber according to claim 1, characterized in that, Methods for obtaining the abnormal shrinkage coefficient of the support cylinder of the adjacent next steel plate to control demolding include: Obtain the simulation curve showing the relationship between cylinder displacement and cylinder pressure for each steel plate during the simulated demolding process. For the top plate demolding cylinder, the relationship curve between cylinder displacement and cylinder pressure during the demolding process of the top plate is fitted. Based on the DTW matching result between the relationship curve and the simulation relationship curve, and the abnormal shrinkage coefficient at each monitoring time, the simulation error is obtained. After the next adjacent steel plate begins demolding, at each monitoring time, the historical change relationship curve between the cylinder displacement and cylinder pressure of the support cylinder during the demolding process of the steel plate is fitted. Based on the DTW matching result of the historical change relationship curve and the corresponding simulation change relationship curve at the corresponding monitoring time and the simulation error, the abnormal contraction coefficient of the support cylinder of the next adjacent steel plate is obtained. At each monitoring moment, if the abnormal contraction coefficient of the support cylinder of the next adjacent steel plate is less than the preset threshold, the demolding is determined to be normal and demolding continues; otherwise, demolding is stopped.

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