A stress balance regulation device, system and method for a prestressed support system

Abstract

The present invention discloses a stress balance regulation device, system and method for a prestressed support system, which relates to the technical field of stress regulation and can solve the problem of targeted stress balance regulation of the soil around a deep foundation pit by the prestressed support system. A stress balance regulation method for a prestressed support system in this embodiment includes obtaining the pressure ratios of multiple groups of pressure sensor groups and constructing a pressure ratio matrix of the pressure sensor groups; judging whether there is a pressure imbalance risk area according to the pressure ratio matrix. If so, an alarm is given. If not, the above steps are repeated; determining a regulation node group based on the pressure imbalance risk area; sending a control signal to the corresponding stress regulation unit to perform a stress regulation action; obtaining the pressure ratios corresponding to the pressure imbalance risk area and constructing a temporary pressure ratio matrix; judging whether the pressure imbalance risk area is lifted. If so, a risk lifted display is output and the above steps are repeated. If not, it turns to the step of determining the regulation node group.

Description

Technical Field

[0001] The present invention relates to the technical field of stress regulation, and particularly relates to a stress balance control device, system and method for a prestressed support system. Background Art

[0002] The foundation pit support system is mainly a reinforcement and protection measure taken to ensure the construction of underground structures and the safety of their surrounding areas. Common support forms include row pile support, steel sheet pile support, soil nail wall support, in-pit support, and other support forms. However, conventional support forms generally provide passive retaining based on soil pressure. Once the soil pressure exceeds the design value, the risk of foundation pit collapse suddenly increases, and it is very difficult to adjust the retaining force.

[0003] Currently, new support systems such as the fish-belly beam support system can actively apply a certain prestress to the soil around the foundation pit through the cables of the support system in advance. However, since the soil conditions at each position around the foundation pit are different, it is very difficult to monitor and adjust the state of the soil around the foundation pit after actively applying the preset prestress. It is easy to cause the stability of the overall support to decline or even the support structure to fail due to unstable force balance. Therefore, it is urgent to solve the problem of difficult targeted adjustment of stress balance in the current support system.

[0004] Based on the above background, the inventor designed a stress balance control device, system and method for a prestressed support system to solve at least one of the above problems, and thus, this application is proposed. Summary of the Invention

[0005] The purpose of this application is to provide a stress balance control device, system and method for a prestressed support system, which can construct a lattice monitoring and control system based on the soil around a deep foundation pit to monitor and control the dynamic balance of the active-passive earth pressure of the soil around the deep foundation pit, and solve the problem that it is difficult to perform targeted stress balance control on the soil around the deep foundation pit in a conventional prestressed support system.

[0006] To solve the above technical problems, the present invention adopts the following solutions:

[0007] On the one hand, this application provides a stress balance control method for a prestressed support system, which specifically includes the following steps:

[0008] S1. Obtain multiple groups of pressure ratios of a pressure sensor group multiple times within a unit time, and construct a pressure ratio matrix with the node coordinates of the pressure sensor group attached multiple times;

[0009] S2. Determine whether there is a pressure imbalance risk area based on the pressure ratio matrix constructed multiple times. If so, give an alarm and go to S3; if not, go to S1;

[0010] S3. Determine the control node group that needs stress adjustment based on the pressure imbalance risk area;

[0011] S4. Send a control signal to the stress control unit of the control node group to perform the stress control action;

[0012] S5. Obtain the pressure ratio of the pressure sensor group corresponding to the pressure imbalance risk area, and construct a temporary pressure ratio matrix after the stress control action;

[0013] S6. Determine whether the pressure imbalance risk area is lifted according to the temporary pressure ratio matrix. If so, output a risk-lifted display and go to S1; if not, go to S3.

[0014] Optionally, in S2, it specifically includes the following steps:

[0015] S21. Construct a rectangular coordinate system with the abscissa being time and the ordinate being the pressure ratio;

[0016] S22. Import the pressure ratios obtained by one of the nodes in the pressure ratio matrix multiple times within a unit time into the rectangular coordinate system;

[0017] S23. Connect the multiple pressure ratios in the rectangular coordinate system to form a pressure ratio change curve of the node within a unit time;

[0018] S24. Determine whether the node is a risk node according to the pressure ratio change curve;

[0019] S25. Repeat the above steps until all nodes are judged;

[0020] S26. Output whether there is a pressure imbalance risk area according to the judgment results of all nodes.

[0021] Optionally, in S3, the stress control unit of the control node coordinate group includes a core stress control node and an auxiliary stress control node;

[0022] The core stress control node corresponds to the risk node in S25;

[0023] The auxiliary stress control node corresponds to the node adjacent to the risk node in S25.

[0024] Optionally, in S21, a pressure ratio fluctuation area is set in the rectangular coordinate system;

[0025] In S24, it is necessary to jointly judge whether the corresponding node is a risk node according to the slope of the pressure ratio change curve and its ratio in the pressure ratio fluctuation area:

[0026] Non-risk node: More than 80% of the pressure ratio change curve is located within the pressure ratio fluctuation area, and the slope does not exceed the threshold range;

[0027] Collapse risk node: more than 80% of the pressure ratio change curves are outside the pressure ratio fluctuation area, with a negative slope and exceeding the threshold range;

[0028] Overload risk node: More than 80% of the pressure ratio change curves are outside the pressure ratio fluctuation area, with a positive slope and exceeding the threshold range.

[0029] Optionally, in S24, the pressure ratio fluctuation range is: 1 to 3;

[0030] The threshold range for slope is: -0.5 to 1.

[0031] Optionally, in S1 to S6, the following actions are also performed synchronously:

[0032] S1, obtaining the inclination values ​​of multiple inclination sensors and constructing an inclination value matrix with the inclination sensor node coordinates;

[0033] S2: Determine whether there is a collapse risk area based on the inclination value matrix. If yes, alarm and go to S3; if no, go to S1;

[0034] S3. Determine the corresponding stress adjustment mechanism based on the collapse risk area;

[0035] S4, sending a control signal to the stress adjustment mechanism;

[0036] S5, obtaining the inclination value of the inclination sensor corresponding to the collapse risk area, and constructing a temporary inclination value matrix after the stress control action;

[0037] S6. Determine whether the collapse risk area has been lifted based on the temporary inclination value matrix. If so, output the risk lifting display and go to S1. If not, go to S3.

[0038] Optionally, before determining the control node coordinate group and the stress adjustment mechanism, it is necessary to determine whether the collapse risk area and the pressure imbalance risk area overlap:

[0039] If so, in S4, the stress control unit corresponding to the overlapping risk area of ​​the collapse risk area and the pressure imbalance risk area stops executing the stress control action.

[0040] Optionally, before S1, also include:

[0041] S0. Obtain multiple groups of pressure sensor group layout position nodes including soil pressure sensors and support pressure sensors, as well as multiple inclination sensor layout position nodes, and construct pressure node coordinate matrices and inclination node coordinate matrices of the pressure sensor group and the inclination sensor respectively based on the three-dimensional coordinate system.

[0042] On the other hand, the present application provides a stress balance regulation device for a prestressed support system, including:

[0043] A sensing module for performing data monitoring and a regulation module for performing stress regulation actions;

[0044] The sensing module includes a pressure sensor group for collecting pressure data inside and outside the soil body in the soil body and on the side wall of the deep foundation pit;

[0045] The regulation module includes stress regulation units distributed in a dot matrix on the side wall of the deep foundation pit and used for performing stress regulation actions;

[0046] The pressure sensor group is distributed in a dot matrix and corresponds to the stress regulation units.

[0047] In a third aspect, the present application provides a stress balance regulation system for a prestressed support system, including:

[0048] One or more processors;

[0049] A storage unit for storing one or more programs, which, when executed by the one or more processors, enable the one or more processors to implement a stress balance regulation method for a prestressed support system as described in any one of the above.

[0050] Advantages of the present invention:

[0051] First, by constructing multiple groups of pressure sensor groups for soil pressure - support pressure, the present application can achieve dynamic balance monitoring of the peripheral wall and surrounding soil of the deep foundation pit, timely perform targeted regulation on pressure imbalance nodes, reduce the collapse risk and shear failure risk of the soil around the deep foundation pit, and effectively solve the problem that it is difficult for a conventional prestressed support system to perform targeted stress balance regulation on the soil around the deep foundation pit.

[0052] Second, on the basis of stress balance monitoring - regulation, the present application also performs real - time monitoring and regulation on the inclination angle value of the peripheral wall of the deep foundation pit, which can further reduce the collapse risk of the soil around the deep foundation pit. Description of the Drawings

[0053] Figure 1 It is the system flow chart of Embodiment 1 of the present application.

[0054] Figure 2 It is a partial node schematic diagram of the pressure ratio matrix constructed 4 times continuously in Embodiment 1 of the present application;

[0055] Figure 3 It is a schematic diagram of the rectangular coordinate system constructed for judging Node B2 based on the pressure ratio matrix constructed 4 times in Embodiment 1 of the present application, and its pressure change curve;

[0056] Figure 4 It is a schematic diagram of the pressure imbalance risk area after determining that node B2 is an overloading risk node in Embodiment 1 of this application;

[0057] Figure 5 It is a schematic diagram of the core stress regulation node and the auxiliary stress regulation node after determining that node B2 is an overloading risk node in Embodiment 1 of this application.

[0058] Figure 6 It is a schematic diagram of module connection in Embodiment 2 of this application.

[0059] Figure 7 It is a top view structural schematic diagram after the regulation module and the support structure in Embodiment 2 of this application are arranged in a deep foundation pit. Detailed implementation manners

[0060] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the implementation manners of the present invention are not limited thereto.

[0061] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0062] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "provided with", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0063] The present invention will be described in detail below by referring to the drawings and in conjunction with the embodiments.

[0064] Embodiment 1:

[0065] As Figures 1 to 5 shown, this embodiment provides a stress balance regulation method for a prestressed support system, which specifically includes the following steps:

[0066] S1, obtaining pressure ratios of multiple pressure sensor groups multiple times within a unit time, and constructing a pressure ratio matrix with multiple pressure sensor group node coordinates;

[0067] S2. Determine whether there is a pressure imbalance risk area based on the pressure ratio matrix constructed multiple times. If so, alarm and go to S3. If not, go to S1.

[0068] S3. Based on the pressure imbalance risk area, determine the control node group that needs stress adjustment;

[0069] S4, sending a control signal to the stress control unit of the control node group to execute the stress control action;

[0070] S5. Obtain the pressure ratio of the pressure sensor group corresponding to the pressure imbalance risk area, and construct a temporary pressure ratio matrix after the stress control action;

[0071] S6. Determine whether the pressure imbalance risk area is lifted according to the temporary pressure ratio matrix. If so, output the risk release display and go to S1. If not, go to S3.

[0072] The single group of pressure sensor groups in this embodiment includes soil pressure sensors and support pressure sensors corresponding to each other. The soil pressure sensors and support pressure sensors in the same group of pressure sensor groups have the same height, and the connecting lines of the soil pressure sensors and support pressure sensors in the same group are perpendicular to the side walls of the deep foundation pit. The force direction of the soil pressure sensor is perpendicular to the side walls of the foundation pit. The support pressure sensor is located between the side walls of the deep foundation pit and the support structure of the support system. The deep foundation pit has multiple groups of pressure sensor groups distributed in a dot matrix along its circumference, so that the multiple groups of pressure sensor groups can monitor the pressure balance trend of the soil around the deep foundation pit in real time. After the soil pressure sensor is buried in the soil, the soil pressure sensor can monitor the active pressure in the soil around the deep foundation pit, that is, active pressure monitoring. After the support pressure sensor is arranged, after the support system applies prestress to the soil to cause the soil to deform, the support pressure sensor can be used to measure the reaction force of the deformed soil on the support structure, that is, passive pressure monitoring, thereby constructing several groups of pressure sensing detection groups around the deep foundation pit soil that can perform active-passive pressure dynamic monitoring.

[0073] This embodiment further adjusts the stress of the support structure in a targeted manner based on the monitoring results of the active-passive pressure, thereby solving the technical problems raised in the background technology.

[0074] Therefore, in this embodiment, by constructing multiple groups of pressure sensor groups for soil pressure - support pressure, dynamic balance monitoring of the peripheral wall and surrounding soil of the deep foundation pit can be achieved, timely targeted regulation of pressure imbalance nodes can be carried out, the risks of soil collapse and shear failure around the deep foundation pit can be reduced, and the problem that it is difficult for the conventional prestressed support system to carry out targeted stress balance regulation on the surrounding soil of the deep foundation pit can be effectively solved.

[0075] In this embodiment, the method for constructing the temporary pressure ratio matrix in S5 is the same as the method for constructing the pressure ratio matrix in S1, and the method for judging whether the pressure imbalance risk area is lifted in S6 is the same as the method for judging whether the pressure imbalance risk area exists in S2.

[0076] In this embodiment, after it is judged in S2 that the pressure imbalance risk area does not exist, or after it is judged in S6 that the pressure imbalance risk area is lifted, before turning to S1, an interval time can also be set, such as 10 seconds or 15 seconds, or other interval times can also be set, which will not be elaborated with examples here.

[0077] Specifically, in this embodiment, in S2, it specifically includes the following steps:

[0078] S21. Construct a rectangular coordinate system with the abscissa being time and the ordinate being the pressure ratio;

[0079] S22. Import the pressure ratios obtained multiple times within a unit time of one node in the pressure ratio matrix into the rectangular coordinate system;

[0080] S23. Connect the multiple pressure ratios in the rectangular coordinate system to form the pressure ratio change curve of this node within a unit time;

[0081] S24. Judge whether this node is a risk node according to the pressure ratio change curve;

[0082] S25. Repeat the above steps until all nodes are judged;

[0083] S26. Output whether there is a pressure imbalance risk area according to the judgment results of all nodes.

[0084] In this embodiment, the pressure ratio of a single node is the ratio of the data monitored by the same - group support pressure sensor and soil pressure sensor. Under normal working conditions, the pressure ratio should fluctuate within a fixed range. If an abnormal working condition occurs, for example, the pressure ratio is too high, it means that the passive pressure received by the support structure is too large, and there is an overload situation of the support structure at the corresponding node, and the support pressure at the corresponding node needs to be reduced. On the contrary, if the pressure ratio is too low, it means that the passive pressure received by the support structure is too low, and there is a risk of the soil collapsing outward, and the support pressure at the corresponding node needs to be increased.

[0085] In some embodiments, the pressure ratio in the above steps S1 to S6 can also be replaced with the pressure difference between the soil pressure sensor and the support pressure sensor. A pressure difference matrix is constructed based on the pressure differences of multiple groups of pressure sensor sets to form a pressure difference change curve. Then, according to the pressure difference change curve, it is determined whether the node is a risk node. If the pressure difference change curve is within the defined range, it can be indicated that the node is in a normal working condition. If an abnormal working condition occurs and the pressure difference is too large, it means that the passive pressure on the support structure is too large, and there is a situation where the support structure at the corresponding node is overloaded, and the support pressure at the corresponding node needs to be reduced. On the contrary, if the pressure ratio is too low or even negative, it means that the soil pressure is greater than the support pressure, and there is a risk of the soil collapsing outward, and the support pressure at the corresponding node needs to be increased.

[0086] Specifically, in this embodiment, in S3, the stress regulation unit for regulating the node coordinate group includes a core stress regulation node and an auxiliary stress regulation node;

[0087] The core stress regulation node corresponds to the risk node in S25;

[0088] The auxiliary stress regulation node corresponds to the node adjacent to the risk node in S25.

[0089] In this embodiment, the nodes corresponding to the auxiliary stress regulation nodes are all nodes that are not determined as risk nodes in S24.

[0090] In S4, when sending a control signal to the stress regulation unit of the regulation node group, the auxiliary stress regulation node needs to be multiplied by an auxiliary coefficient in advance. The range of the auxiliary coefficient is from 0.3 to 0.7. The auxiliary coefficient can be preset in advance or determined by the technical personnel according to the soil type.

[0091] Specifically, in this embodiment, as Figure 3 shown, in S21, there is a pressure ratio fluctuation area in the rectangular coordinate system;

[0092] In S24, it is necessary to jointly determine whether the corresponding node is a risk node according to the slope of the pressure ratio change curve and its ratio to the pressure difference fluctuation area:

[0093] Non-risk node: More than 80% of the pressure ratio change curve is located within the pressure ratio fluctuation area, and the slope does not exceed the threshold range;

[0094] Collapse risk node: More than 80% of the pressure ratio change curve is located outside the pressure ratio fluctuation area, the slope is negative and exceeds the threshold range;

[0095] Overload risk node: More than 80% of the pressure ratio change curve is located outside the pressure ratio fluctuation area, the slope is positive and exceeds the threshold range.

[0096] The technicians can set the ratio of the pressure ratio change curve to the pressure ratio fluctuation zone as needed. Under the same upper and lower limits of the pressure ratio fluctuation zone, the slope of the pressure ratio change curve corresponding to the non-risk node will be smaller as the unit time is extended.

[0097] Specifically, in this embodiment, in S24, the pressure ratio fluctuation range is: 1 to 3;

[0098] The threshold range of the slope is: -0.5 to 1. The technicians can set the upper and lower limits of the pressure ratio fluctuation zone and the threshold range of the slope as needed, which will not be described in detail here.

[0099] like Figures 2 to 4 As shown, it illustrates a schematic diagram of some nodes of a pressure ratio matrix that is constructed four times in succession, wherein each node, such as the B2 node, corresponds to the layout position of the pressure sensor group. After the pressure ratio matrix is ​​constructed four times, the pressure ratio of the B2 node is imported into the rectangular coordinate system, and the four points are connected as a curve. The ratio of the pressure ratio change curve corresponding to the B2 node to the pressure ratio fluctuation area, as well as its total slope, can be determined. In this embodiment, the B2 node can be determined as an overload risk node based on the above data. Based on the fact that the B2 node is an overload risk node, the b2 node corresponding to the B2 node can be established as a core stress control node, and a2, b1, b3, and c2 can be established as auxiliary stress control nodes.

[0100] Specifically, Figure 1 As shown, in this embodiment, in S1 to S6, the following actions are also performed synchronously:

[0101] S1, obtaining the inclination values ​​of multiple inclination sensors and constructing an inclination value matrix with the inclination sensor node coordinates;

[0102] S2: Determine whether there is a collapse risk area based on the inclination value matrix. If yes, alarm and go to S3; if no, go to S1;

[0103] S3. Determine the corresponding stress adjustment mechanism based on the collapse risk area;

[0104] S4, sending a control signal to the stress adjustment mechanism;

[0105] S5, obtaining the inclination value of the inclination sensor corresponding to the collapse risk area, and constructing a temporary inclination value matrix after the stress control action;

[0106] S6. Determine whether the collapse risk area has been lifted based on the temporary inclination value matrix. If so, output the risk lifting display and go to S1. If not, go to S3.

[0107] In this embodiment, on the basis of stress balance monitoring and regulation, the inclination angle values of the peripheral wall of the deep foundation pit are also monitored and regulated in real time, which can further reduce the collapse risk of the soil around the deep foundation pit.

[0108] In this embodiment, a second rectangular coordinate system with the abscissa as time and the ordinate as the inclination angle value can be constructed according to the inclination angle value matrix, and whether there is a collapse risk can be judged according to the change direction and magnitude of the inclination angle value per unit time;

[0109] If the change value of the inclination angle is too large and the change value of the inclination angle is positive, the matrix node corresponding to the inclination angle sensor has an outward collapse risk. On the contrary, if the change value of the inclination angle is too large and the change value of the inclination angle is negative, the matrix node corresponding to the inclination angle sensor has an inward damage risk.

[0110] And in this embodiment, the maximum deviation angle value of the inclination angle value can be set, such as -2° and 2°. Once it is monitored that the inclination angle value deviates from -2° to 2°, an alarm will be issued immediately, and the monitoring point will be defined as a risk node. According to the inclination angle value, it is determined whether the node is an outward collapse risk node or an inward damage risk node, and then a corresponding control signal is sent to the stress adjustment mechanism.

[0111] Specifically, in this embodiment, before determining the coordinate group of the regulation node and the stress adjustment mechanism, it is necessary to judge whether there is an overlap between the collapse risk area and the pressure imbalance risk area:

[0112] If so, in S4, the stress regulation unit corresponding to the overlapping risk area of the collapse risk area and the pressure imbalance risk area cancels the execution of the stress regulation action, avoiding the problem of inducing risks due to over-regulation.

[0113] Specifically, in this embodiment, before S1, it further includes:

[0114] S0. Obtain the layout position nodes of multiple pressure sensor groups including soil pressure sensors and support pressure sensors, and the layout position nodes of multiple inclination angle sensors, and respectively construct a pressure node coordinate matrix and an inclination angle node coordinate matrix of the pressure sensor group and the inclination angle sensor based on a three-dimensional coordinate system.

[0115] In some embodiments, technicians can also construct a three-dimensional model of the foundation pit based on the foundation pit data in a three-dimensional coordinate system, import the positions of the pressure sensor group and the inclination angle sensor into the three-dimensional coordinate system, and display them in the three-dimensional model of the foundation pit. After a risk node appears, the three-dimensional coordinates of the risk node are synchronously displayed in the three-dimensional coordinate system in real time, visually displaying the risk node and the risk area.

[0116] In this embodiment, if the adjustment force of the stress control unit and the stress control mechanism exceeds the threshold value and the risk node is still not released, diagonal braces can be added as required to increase the passive resistance force of the deep foundation pit side wall.

[0117] Embodiment 2:

[0118] As Figure 6 and Figure 7 shown, this embodiment provides a stress balance control device for a prestressed support system, including:

[0119] a sensing module for performing data monitoring and a control module for performing stress control actions;

[0120] The sensing module includes a pressure sensor group for collecting pressure data inside and outside the soil in the soil body and on the side wall of the deep foundation pit.

[0121] The control module includes stress control units distributed in a dot matrix on the side wall of the deep foundation pit and used to perform stress control actions.

[0122] The pressure sensor group is distributed in a dot matrix and corresponds to the stress control units.

[0123] In this embodiment, the control module further includes a stress adjustment mechanism, and the stress adjustment mechanism is an adjustment motor for driving the cable to retract or release, and the hydraulic unit presses against the cable and the side wall of the deep foundation pit.

[0124] Embodiment 3

[0125] This embodiment provides a stress balance control system for a prestressed support system, including:

[0126] one or more processors;

[0127] a storage unit for storing one or more programs, which, when executed by the one or more processors, enable the one or more processors to implement a stress balance control method for a prestressed support system as described in any one of the above.

[0128] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered within the protection scope of the present invention.

Claims

1. A stress balance regulation method for a prestressed support system, characterized in that, It includes the following steps: S1. Obtain multiple sets of pressure ratios of a pressure sensor group multiple times within a unit time, and construct a pressure ratio matrix with the node coordinates of the pressure sensor group attached multiple times; The pressure ratio is the ratio of the data monitored by the supporting pressure sensor and the soil pressure sensor in the same group; The soil pressure sensors and the supporting pressure sensors in the same group of pressure sensor groups have the same height, and the connecting lines of the soil pressure sensors and the supporting pressure sensors in the same group are perpendicular to the side wall of the deep foundation pit. The force direction of the soil pressure sensor is perpendicular to the side wall of the foundation pit. The supporting pressure sensor is located between the side wall of the deep foundation pit and the supporting structure of the supporting system, and the soil pressure sensor is buried in the soil; S2. Judge whether there is a pressure imbalance risk area according to the pressure ratio matrix constructed multiple times. If so, alarm and go to S3. If not, go to S1; The specific content of S2 includes: S21. Construct a rectangular coordinate system with the abscissa being time and the ordinate being the pressure ratio; S22. Import the pressure ratios obtained multiple times by one node in the pressure ratio matrix within a unit time into the rectangular coordinate system; S23. Connect multiple pressure ratios in the rectangular coordinate system to form a pressure ratio change curve of this node within a unit time; S24. Judge whether this node is a risk node according to the pressure ratio change curve; S25. Repeat the above steps until all nodes are judged; S26. Output whether there is a pressure imbalance risk area according to the judgment results of all nodes; S3. Based on the pressure imbalance risk area, determine the coordinate group of regulation nodes that need to perform stress regulation; S4. Send a control signal to the stress regulation unit of the coordinate group of regulation nodes to perform a stress regulation action; S5. Obtain the pressure ratio of the pressure sensor group corresponding to the pressure imbalance risk area, and construct a temporary pressure ratio matrix after the stress regulation action; S6. Judge whether the pressure imbalance risk area is lifted according to the temporary pressure ratio matrix. If so, output a risk-lifted display and go to S1. If not, go to S3.

2. The stress balance regulation method of a prestressed support system according to claim 1, characterized in that In S3, the stress regulation unit of the coordinate group of regulation nodes includes a core stress regulation node and an auxiliary stress regulation node; The core stress regulation node corresponds to the risk node in S25; The auxiliary stress regulation node corresponds to the node adjacent to the risk node in S25.

3. The stress balance regulation method of a prestressed support system according to claim 1, characterized in that In S21, there is a pressure ratio fluctuation area in the rectangular coordinate system; In S24, it is necessary to jointly judge whether the corresponding node is a risk node according to the slope of the pressure ratio change curve and its ratio in the pressure ratio fluctuation area: Non-risk node: More than 80% of the pressure ratio change curve is located within the pressure ratio fluctuation area, and the slope does not exceed the threshold range; Collapse risk node: More than 80% of the pressure ratio change curve is located outside the pressure ratio fluctuation area, the slope is negative and exceeds the threshold range; Overload risk node: More than 80% of the pressure ratio change curve is located outside the pressure ratio fluctuation area, the slope is positive and exceeds the threshold range.

4. A stress balance regulation method for a prestressed support system according to claim 3, characterized in that In S24, the pressure ratio fluctuation area is: 1 to 3; The threshold range of the slope is: -0.5 to 1.

5. A stress balance regulation method for a prestressed support system according to claim 1, characterized in that, In S1 to S6, the following actions also need to be executed synchronously: S1, obtaining the inclination values ​​of multiple inclination sensors and constructing an inclination value matrix with the inclination sensor node coordinates; S2: Determine whether there is a collapse risk area based on the inclination value matrix. If yes, alarm and go to S3; if no, go to S1; S3. Determine the corresponding stress adjustment mechanism based on the collapse risk area; S4, sending a control signal to the stress adjustment mechanism; S5, obtaining the inclination value of the inclination sensor corresponding to the collapse risk area, and constructing a temporary inclination value matrix after the stress control action; S6. Determine whether the collapse risk area has been lifted based on the temporary inclination value matrix. If so, output the risk lifting display and go to S1. If not, go to S3.

6. The stress balance regulation method of a prestressed support system according to claim 5, characterized in that, In S3, before determining the control node coordinate group and stress adjustment mechanism, it is necessary to determine whether the collapse risk area and the pressure imbalance risk area overlap: If so, in S4, the stress control unit corresponding to the overlapping risk area of ​​the collapse risk area and the pressure imbalance risk area stops executing the stress control action.

7. A stress balance regulation method for a prestressed support system according to claim 5, characterized in that Prior to S1, this also included: S0. Obtain multiple groups of pressure sensor group layout position nodes including soil pressure sensors and support pressure sensors, as well as multiple inclination sensor layout position nodes, and construct pressure node coordinate matrices and inclination node coordinate matrices of the pressure sensor group and the inclination sensor respectively based on the three-dimensional coordinate system.

8. A stress balance regulation system for a prestressed support system, characterized in that, include: one or more processors; A storage unit, used to store one or more programs, which, when executed by the one or more processors, can enable the one or more processors to implement a stress balance control method for a prestressed support system as described in any one of claims 1 to 7.

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