Anti-floating anchor rod construction control method based on distributed displacement monitoring

Abstract

The application discloses a construction control method of anti-floating anchor rod based on distributed displacement monitoring, and the control method comprises arrangement of an anti-floating anchor rod system, distributed displacement monitoring, visual analysis, intelligent decision of electro-osmosis and control of electro-osmosis; the electro-osmosis equipment is integrated on the anti-floating anchor rod and a drainage pipe, so that the uniformity of an electric field distribution, the efficiency of drainage and the ability of resisting groundwater buoyancy are improved; linkage of the anti-floating anchor rod system based on the electro-osmosis principle and distributed displacement monitoring data realizes dynamic regulation and control and closed-loop control; according to the floating or subsidence state of a stratum, the drainage rate and range are accurately controlled, so that the anti-floating anchor rod system adapts to the change of temporary load of an underground engineering structure during construction and the influence of rainfall on the groundwater level, and the possibility of stratum compression settlement caused by excessive drainage is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of control systems and relates to an anti-floating anchor construction control method based on distributed displacement monitoring. BACKGROUND

[0002] Underground engineering structures such as basements, underground tunnels and underground pipe galleries need to resist the buoyancy of groundwater for a long time during construction and operation to ensure the anti-floating stability of the structures. As a commonly used anti-floating structure, the anti-floating anchor provides anti-floating stability for the structure through the adhesion between the anchor rod body and the surrounding soil and the self-lifting force of the anchor rod.

[0003] The existing anti-floating anchor mainly improves the lifting capacity by increasing the length and diameter of the anchor rod or improving the strength of the grouting body, which belongs to passive anti-floating. Moreover, the design of the anti-floating anchor is based on the assumption of static load and static water level, and it is difficult to adapt to the changes of the temporary load of the underground engineering structure and the influence of rainfall on the underground water level during construction. When short-term heavy rain causes the phreatic water level to rise sharply or long-term rain causes the confined water to rise slowly, if the main body of the underground engineering structure is not completed, the dead load will be insufficient, and the underground engineering structure is prone to overall floating under the action of the groundwater buoyancy, which seriously threatens the safety of the underground engineering structure and the construction progress. To cope with extreme situations during construction, the anti-floating capacity of the anchor rod is improved at any cost, which will significantly affect the economic rationality of the engineering construction.

[0004] The electro-osmosis technology is based on the principle of electrochemistry, and the pore water is made to migrate directionally by applying an electric field in the soil. The electro-osmosis technology has been applied in the fields of soft foundation drainage and foundation pit seepage prevention. The existing technology gap of the electro-osmosis technology applied to the anti-floating of underground engineering structures includes: 1) Lack of integrated design: the existing electro-osmosis equipment represented by the electro-osmosis well point is an external device independent of the underground engineering structure, which is not integrated with the anchor structure, resulting in uneven distribution of the electric field and low drainage efficiency; 2) Lack of dynamic control mechanism: the traditional electro-osmosis system relies on manual start and stop, and is not linked with the construction monitoring data, making it difficult to realize the closed-loop control between real-time monitoring and intelligent response; 3) Lack of control mechanism for groundwater loss and settlement risk: if the electro-osmosis method is over-drained, it may cause the effective stress of the soil around the anchor to increase, leading to ground compression settlement. However, the existing technology does not establish the correlation between settlement and drainage volume, and cannot accurately control the drainage rate and range, which may cause the risk of uneven settlement due to local dewatering.

[0005] Therefore, there is an urgent need for an electro-osmosis anti-floating anchor construction control method based on distributed displacement monitoring, which realizes the deep integration of the anti-floating structure and the active drainage technology, establishes a correlation control method for settlement and drainage volume, and ensures the intelligence, anti-floating safety and economic efficiency of the underground engineering structure during construction. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides an anti-floating anchor construction control method based on distributed displacement monitoring, which is suitable for anti-floating anchor monitoring and control during underground engineering structure construction, and is conducive to improving the intelligence, anti-floating safety and economic efficiency of underground engineering structures during construction.

[0007] The anti-floating anchor construction control method based on distributed displacement monitoring comprises the following steps:

[0008] S1, arrangement of an anti-floating anchor system:

[0009] The anti-floating anchor system comprises an electro-osmosis anode anti-floating anchor, an electro-osmosis cathode drainage pipe and a water pumping device; the electro-osmosis anode anti-floating anchor is a titanium wire mesh spirally wound on the outer surface of the free section of a conventional anti-floating anchor, the titanium wire mesh is insulated and fixed with the anchor rod body, and serves as an electro-osmosis anode connected with a positive pole of an external power supply; the electro-osmosis cathode drainage pipe has a double-layer structure, the inner layer is a pure titanium conductive core, the outer layer is wrapped with a graphite conductive layer, and a plurality of water permeable holes and water permeable screens are arranged on the pipe wall; the electro-osmosis cathode drainage pipe serves as an electro-osmosis cathode connected with a negative pole of the external power supply; the water pumping device is a water pump installed at the top end of the electro-osmosis cathode drainage pipe, and is used for pumping water in the electro-osmosis cathode drainage pipe to above the ground;

[0010] When the anti-floating anchor system is arranged, the electro-osmosis anode anti-floating anchors and the electro-osmosis cathode drainage pipes are alternately pre-buried into the stratum at a designed interval, so as to ensure that the electro-osmosis anode anti-floating anchors and the electro-osmosis cathode drainage pipes cooperate with each other and form a closed loop, thereby driving water in the stratum to migrate from the electro-osmosis anode anti-floating anchors to the electro-osmosis cathode drainage pipes;

[0011] S2, distributed displacement monitoring:

[0012] The displacement sensors are arranged in a grid layout to cover the construction area; for a vertical displacement sensitive area of the stratum, the arrangement interval of the displacement sensors is locally reduced; the displacement sensors collect vertical displacement data of the stratum in real time, and simultaneously record coordinate data and time data of the displacement sensors, so as to mark the vertical displacement data of the stratum as S ( x, y, z, t );Before the anti-floating anchor construction, the reference vertical displacement data of the stratum obtained by monitoring are marked as S 0 ( x, y, z, t 0 );After the anti-floating anchor construction, the vertical displacement data of the stratum obtained by the first i time monitoring are marked as S i ( x, y, z, t i );relative to the reference vertical displacement of the stratum, the vertical displacement data of the stratum obtained by the firsti The vertical displacement change value Δ of the formation in the nth monitoring S i ( x, y, z, t i ) satisfies the following expression:

[0013] Δ S i ( x, y, z, t i )= S i ( x, y, z, t i )- S 0 ( x, y, z, t 0 )

[0014] Wherein, when the value of the vertical displacement change value Δ of the formation in the nth monitoring i S i ( x, y, z, t i ) is positive, it indicates that the formation is floating up, and when it is negative, it indicates that the formation is sinking;

[0015] The vertical displacement change rate of the formation in the nth monitoring i -1 monitoring is relative to the vertical displacement of the formation in the nth monitoring i V i ( x, x, y, z, t i ) satisfies the following expression:

[0016]

[0017] Wherein, when the value of the vertical displacement change rate of the formation in the nth monitoring i V i ( y, z, t i ) is positive, it indicates that the formation is floating up, and when it is negative, it indicates that the formation is sinking;

[0018] S3, data visualization analysis:

[0019] The vertical displacement of the formation in the nth monitoring i S i ( x, y, z, t i ), the vertical displacement change value Δ of the formation in the nth monitoring i S i ( x, y, z, t i ) and the vertical displacement change rate of the formation in the nth monitoring i ​​​​​Subsidence rate of vertical displacement of the monitored stratum V i ( x, y, z, t i ) into a visualized heat map for intuitive display S i ( x, y, z, t i ), Δ S i ( x, y, z, t i ) and V i ( x, y, z, t i ) of the spatial distribution characteristics

[0020] S4, intelligent decision of electro-osmosis:

[0021] The microcomputer control module adopts a deep convolutional neural network technology to establish a mapping relationship between image features of the visualized heat map and electro-osmosis control quantities, and to identify displacement abnormal areas; the electro-osmosis control quantities include voltage values applied to each of the electro-osmosis anode anti-floating anchor rod and the electro-osmosis cathode drainage pipe; the decision logic of the microcomputer control module includes: if the visualized heat map shows that Δ S i ( x, y, z, t i ) exceeds its allowable value [Δ S u ] or V i ( x, y, z, t t i ) exceeds its allowable value [Δ V u ], it is determined as a displacement abnormal area, and the voltage applied to the anti-floating anchor rod system in the area is increased; if the visualized heat map shows that Δ S u ( x, y, z, i ) exceeds its allowable value [Δ S u ] or V i ( x, y, z, t x, y, i ) exceeds the allowable value [Δ V s ], it is determined as a displacement abnormal area, and the voltage applied to the anti-floating anchor rod system in the area is decreased;

[0022] S5, control of electro-osmosis: according to the electro-osmosis control amount, a voltage is applied to each of the electro-osmosis anode anti-floating anchor and the electro-osmosis cathode drainage pipe, so as to control the rate of water migration in the stratum from the electro-osmosis anode anti-floating anchor to the electro-osmosis cathode drainage pipe, and further to accurately control the drainage rate and range.

[0023] Preferably, in step S1, the designed spacing between the electro-osmosis anode anti-floating anchor and the electro-osmosis cathode drainage pipe d satisfies the following expression:

[0024]

[0025] wherein, z, t w is the specific weight of water, N·m -3 ; k e is the electro-osmotic coefficient of the soil, m 2 ·V -1 ·s -1 ; h is the length of the electro-osmosis cathode drainage pipe, m; U is the applied voltage, V; t is the duration of electro-osmotic drainage, s;[ S is the allowable value of the vertical displacement of the stratum when floating occurs, m; E s is the compressive modulus of the stratum, Pa.

[0026] Preferably, in step S3, the generation of the visualized heat map is through an interpolation algorithm to convert discrete data into continuous data, and the color of each pixel on the visualized heat map is determined according to the values of S i , γ i , S i , x, y, z, t i and V i . x, y, z, t i

[0027] ​Preferably, in step S4, the convolutional neural network model comprises an image input layer, a convolutional layer, a pooling layer and a fully connected layer; the image input layer is the first layer of the convolutional neural network model and is used for receiving the visualized heat map; the convolutional layer is located behind the image input layer and is used for extracting local features in the visualized heat map; the pooling layer is located behind the convolutional layer and is used for reducing the spatial dimension of the feature map and retaining important feature information; the fully connected layer is located at the end of the convolutional neural network model and is used for comprehensive and classification of the feature information; and the training data of the convolutional neural network model comes from historical engineering data under similar geological conditions.

[0028] Compared with the prior art, the beneficial effects of the present application are: for the anti-floating anchor rod monitoring and control during the construction of underground engineering structure, an anti-floating anchor rod construction control method based on distributed displacement monitoring is proposed, which comprises: arrangement of the anti-floating anchor rod system, distributed displacement monitoring, visualized analysis, intelligent decision of electro-osmosis and control of electro-osmosis; by integrating the electro-osmosis equipment on the anti-floating anchor rod and the drainage pipe, the uniformity of the electric field distribution, the efficiency of drainage and the ability to resist the groundwater uplift force are improved; the linkage of the anti-floating anchor rod system based on the principle of electro-osmosis and the distributed displacement monitoring data realizes dynamic regulation and closed-loop control, and the drainage rate and range are accurately controlled according to the floating or subsidence state of the stratum, so that the anti-floating anchor rod system adapts to the changes of the temporary load of the underground engineering structure during the construction and the influence of rainfall on the groundwater level, and the possibility of excessive drainage causing stratum compression settlement is avoided; the visualized heat map generated based on the distributed displacement monitoring is beneficial to intuitively display the spatial distribution characteristics of the vertical displacement and its change rate, so as to intuitively identify the displacement abnormal area; the correlation control between the visualized heat map and the applied voltage of electro-osmosis is established through the convolutional neural network model, which improves the intelligence, anti-floating safety and economic efficiency of the underground engineering structure during the construction. BRIEF DESCRIPTION OF DRAWINGS

[0029] x, y, z, t Flowchart of the anti-floating anchor rod construction control method based on distributed displacement monitoring of the present application;

[0030] Figure 1 Schematic diagram of the anti-floating anchor rod system shown in the embodiment of the present application;

[0031] The figure shows: 1-electro-osmosis anode anti-floating anchor rod, 11-titanium wire mesh, 2-electro-osmosis cathode drainage pipe, 21-water permeable hole, 22-water permeable filter screen, 3-pumping device, 4-water migration direction. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in more detail with reference to the drawings and specific embodiments, so that those skilled in the art can implement the present application after reading the specification. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0033] The application discloses a construction control method for anti-floating anchor based on distributed displacement monitoring, which comprises the following steps: Figure 2 The application discloses a construction control method for anti-floating anchor based on distributed displacement monitoring, which comprises the following steps:

[0034] S1, arrangement of the anti-floating anchor system: the anti-floating anchor system comprises an electro-osmosis anode anti-floating anchor 1, an electro-osmosis cathode drainage pipe 2 and a water pumping device 3; the electro-osmosis anode anti-floating anchor 1 is a titanium wire mesh 11 spirally wound on the outer surface of the free section of a traditional anti-floating anchor, the titanium wire mesh 11 is fixedly connected with the anchor rod body in an insulating manner and connected with a positive pole of an external power supply as an electro-osmosis anode; the drainage pipe wall of the electro-osmosis cathode drainage pipe 2 has a double-layer structure, the inner layer is a pure titanium conductive core and the outer layer is wrapped with a graphite conductive layer, and a plurality of water permeable holes 21 and a water permeable filter screen 22 are arranged on the pipe wall; the electro-osmosis cathode drainage pipe 2 is connected with a negative pole of the external power supply as an electro-osmosis cathode; the water pumping device 3 is a water pump installed at the top end of the electro-osmosis cathode drainage pipe 2 and used for pumping water in the electro-osmosis cathode drainage pipe 2 to above the ground; when the anti-floating anchor system is arranged, the electro-osmosis anode anti-floating anchor 1 and the electro-osmosis cathode drainage pipe 2 are alternately pre-buried into the stratum at a designed interval, so that the electro-osmosis anode anti-floating anchor 1 and the electro-osmosis cathode drainage pipe 2 are matched with each other and form a closed loop, thereby driving water in the stratum to migrate, and the water migration direction 4 is from the electro-osmosis anode anti-floating anchor 1 to the electro-osmosis cathode drainage pipe 2;

[0035] In the specific implementation, the designed interval between the electro-osmosis anode anti-floating anchor 1 and the electro-osmosis cathode drainage pipe 2 d satisfies the following expression:

[0036] (1)

[0037] wherein, Figures 1-2 w is the specific weight of water, N·m -3 ; k e is the electro-osmosis coefficient of the soil, m 2 ·V -1 ·s -1 ; h is the length of the electro-osmosis cathode drainage pipe, m; U is the applied voltage, V; t is the duration of the electro-osmosis drainage, s;[ S ]is the allowable value of the vertical displacement of the stratum when floating occurs, m; Es is the formation compression modulus, Pa;

[0038] is the water density under typical conditions γ w is 9800 N·m -3 ; the soil body electro-osmotic coefficient k e is 1.3×10 -7 m 2 ·V -1 ·s -1 ; the length of the electro-osmosis cathode drainage pipe h is 4.5 m; the applied voltage U is 300 V; the duration t is 600 s; the allowable value of the formation vertical displacement when floating occurs S is 0.003 m; the formation compression modulus E s is 1.5×10 6 Pa; then the design spacing between the electro-osmosis anode anti-floating anchor 1 and the electro-osmosis cathode drainage pipe 2 d is calculated according to formula (1) as shown in the following formula:

[0039] (2)

[0040] In practice, the design spacing d is 1 m;

[0041] S2, distributed displacement monitoring: the displacement sensors are arranged in a grid layout to cover the construction area; for steep terrain, weak geological belts and the vicinity of the construction excavation face and other sensitive areas of the formation vertical displacement, the arrangement spacing of the displacement sensors is locally reduced; the displacement sensors collect real-time formation vertical displacement data, and simultaneously record the coordinate data and time data where the displacement sensors are located, so as to mark the formation vertical displacement data as S ( γ ); before the construction of the anti-floating anchor, the baseline formation vertical displacement data obtained by monitoring are marked as S 0 ( x, y, z, t 0 ); after the construction of the anti-floating anchor, the formation vertical displacement data obtained by the first i monitoring are marked as S i ( x, y, z, t i ); relative to the baseline formation vertical displacement, the formation vertical displacement change value Δ i of the first S i ( x, y, z, t i ) monitoring satisfies the following expression:

[0042] Δ S i ( x, y, z, t i )= S i ( x, y, z, t i )- S 0 ( x, y, z, t 0 )(3)

[0043] wherein, when the value of the vertical displacement change value Δ i S i ( x, y, z, t i ) of the formation is a positive value, it indicates that the formation is floating up, and when it is a negative value, it indicates that the formation is sinking;

[0044] relative to the vertical displacement of the formation monitored for the first time, the vertical displacement of the formation monitored for the second time i i V i ( x, x, y, z, t i ) satisfies the following expression:

[0045] (4)

[0046] wherein, when the value of the vertical displacement change rate i V i ( y, z, t i ) of the formation monitored for the second time is a positive value, it indicates that the formation is floating up, and when it is a negative value, it indicates that the formation is sinking;

[0047] S3, visual analysis: converting the vertical displacement of the formation monitored for the second time i S i ( x, y, z, t i ), the vertical displacement change value Δ i S i ( x, y, z, t i ) and the vertical displacement change rate i V i ( x, y, z, t t i ) of the formation monitored for the second time into a visual heat map, and intuitively displaying S ​​​​​​​i x, y, z, i S i x, y, z, t i V i x, y, z, t i

[0048] In a specific implementation, the color marking rule of the visualization heat map is as follows:

[0049] (5)

[0050] S i x, y, z, t i V i x, y, z, t i S i x, y, z, t i V i x, y, z, t i

[0051] S4, intelligent decision of electro-osmosis: the microcomputer control module adopts a deep convolutional neural network technology to establish a mapping relationship between the image features of the visualization heat map and the electro-osmosis control quantity, and to identify the displacement abnormal area; the electro-osmosis control quantity includes the voltage applied to each electro-osmosis anode anti-floating anchor rod and the electro-osmosis cathode drainage pipe; the decision logic of the microcomputer control module includes: if the visualization heat map shows that Δ S i x, y, z, t i S u V i x, y, z, t i V u S u x, y, z, t ​​​​​​​​​​​​​​​​​​​​​​i ) exceeds its allowable value [Delta S u ] or V i x, y, z, t x, y, z, t i ) exceeds its allowable value [Delta V s ] is determined as a displacement abnormal area, and the voltage applied to the anti-floating anchor system in the area is reduced;

[0052] In specific implementation, the convolutional neural network model comprises an image input layer, a convolutional layer, a pooling layer and a fully connected layer; the image input layer is the first layer of the convolutional neural network model and is configured to receive the visualized heat map; the convolutional layer is located behind the image input layer and is configured to extract local features in the visualized heat map; the pooling layer is located behind the convolutional layer and is configured to reduce the spatial dimension of the feature map and retain important feature information; the fully connected layer is located at the end of the convolutional neural network model and is configured to synthesize and classify the feature information; the training data of the convolutional neural network model comes from historical engineering data under similar geological conditions;

[0053] S5, electro-osmosis control: according to the electro-osmosis control amount, a voltage is applied to each of the electro-osmosis anode anti-floating anchor and the electro-osmosis cathode drainage pipe, so as to control the rate of water migration in the stratum from the electro-osmosis anode anti-floating anchor to the electro-osmosis cathode drainage pipe, and further accurately control the drainage rate and range.

[0054] It can be seen that by integrating the electro-osmosis equipment on the anti-floating anchor and the drainage pipe, the uniformity of the electric field distribution, the efficiency of drainage and the ability to resist the groundwater uplift force are improved; the linkage of the anti-floating anchor system based on the electro-osmosis principle and the distributed displacement monitoring data realizes dynamic regulation and closed-loop control, accurately controls the drainage rate and range according to the uplift or subsidence condition of the stratum, makes the anti-floating anchor system adapt to the change of the temporary load of the underground engineering structure during construction and the influence of rainfall on the groundwater level, and avoids the possibility of excessive drainage causing stratum compression settlement; the visualized heat map generated based on the distributed displacement monitoring is beneficial to dynamically display the spatial distribution characteristics of the vertical displacement and its change rate, so as to intuitively identify the displacement abnormal area; the correlation control between the visualized heat map and the applied voltage of the electro-osmosis is established through the convolutional neural network model, which improves the intelligence, anti-floating safety and economic efficiency of the underground engineering structure during construction.

[0055] ​The above is one or more embodiments of the present application, which is described more specifically and in detail, but can not be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A construction control method of anti-floating anchor based on distributed displacement monitoring, characterized in that, Comprising the following steps: S1, arrangement of the anti-floating anchor system: the anti-floating anchor system comprises electro-osmosis anode anti-floating anchor, electro-osmosis cathode drainage pipe and water pumping device; when arranging the anti-floating anchor system, the electro-osmosis anode anti-floating anchor and the electro-osmosis cathode drainage pipe are alternately pre-buried into the stratum according to the design interval, so as to ensure that the electro-osmosis anode anti-floating anchor and the electro-osmosis cathode drainage pipe cooperate with each other and form a closed loop, thereby driving the water in the stratum to migrate from the electro-osmosis anode anti-floating anchor to the electro-osmosis cathode drainage pipe; the design interval between the electro-osmosis anode anti-floating anchor and the electro-osmosis cathode drainage pipe d satisfies the following expression: wherein, γ w N•m -3 ; k e m 2 • V -1 • s -1 ; h m U V t s S m E s Pa S2, distributed displacement monitoring: covering the construction area with displacement sensors in a grid layout; the displacement sensors collect vertical displacement data of the stratum in real time, and synchronously record coordinate data and time data where the displacement sensors are located, so as to mark the vertical displacement data of the stratum as S ( x, y, z, t ); the datum vertical displacement data of the stratum obtained by monitoring before the anti-floating anchor construction is marked as S 0 ( x, y, z, t 0 ); the vertical displacement data of the stratum obtained by monitoring for the first time after the anti-floating anchor construction is marked as i S i ( x, y, z, t i ), and the vertical displacement change value Δ i S i ( x, y, z, t i ) of the stratum obtained by monitoring for the first time after the anti-floating anchor construction and the vertical displacement change rate i V i ( x, y, z, t i ) are calculated.​​​ S3, visual analysis: converting the values of S i ( x, y, z, t i ), delta S i ( x, y, z, t i ) and V i ( x, y, z, t i ) into a visual heat map; S4, intelligent decision of electro-osmosis: the microcomputer control module adopts deep convolutional neural network technology to establish the mapping relationship between the image features of the visual heat map and the electro-osmosis control quantity, and to identify the displacement abnormal area; the electro-osmosis control quantity includes the voltage value applied to each electro-osmosis anode anti-floating anchor rod and electro-osmosis cathode drainage pipe; S5, control of electro-osmosis: according to the electro-osmosis control quantity, voltage is applied to each electro-osmosis anode anti-floating anchor rod and electro-osmosis cathode drainage pipe.

2. The construction control method of anti-floating anchor based on distributed displacement monitoring according to claim 1, characterized in that, In the anti-floating anchor rod system, the electro-osmosis anode anti-floating anchor rod is a titanium wire mesh spirally wound on the outer surface of the free section of the traditional anti-floating anchor rod, which is insulated and fixed with the anchor rod body and connected with the positive pole of the external power supply as the electro-osmosis anode; the wall of the electro-osmosis cathode drainage pipe adopts a double-layer structure, the inner layer is a pure titanium conductive core, the outer layer is wrapped with a graphite conductive layer, and a plurality of water permeable holes and water permeable screens are arranged on the wall; the electro-osmosis cathode drainage pipe is connected with the negative pole of the external power supply as the electro-osmosis cathode; the water pumping device adopts a water pump installed at the top end of the electro-osmosis cathode drainage pipe for pumping water entering the electro-osmosis cathode drainage pipe to above the ground.

3. The construction control method of anti-floating anchor based on distributed displacement monitoring according to claim 1, characterized in that, In step S2, the first i vertical displacement change value Δ S i x, y, z, t i satisfies the following expression:​ Δ S i ( x, y, z, t i )= S i ( x, y, z, t i )- S 0 ( x, y, z, t 0 ) wherein, when the vertical displacement change value Δ i of the formation monitored for the second time is positive, it indicates that the formation is floating up, and when the vertical displacement change value Δ S of the formation monitored for the second time is negative, it indicates that the formation is sinking down. i x, y, z, t i the value of the vertical displacement change value Δ of the formation monitored for the second time is positive, it indicates that the formation is floating up, and when the vertical displacement change value Δ of the formation monitored for the second time is negative, it indicates that The first i -1 times the monitored formation vertical displacement, the i times the monitored formation vertical displacement rate of change V i ( x, y, z, t i ) satisfies the following expression: wherein, when the vertical displacement rate of change of the formation monitored for the first time i is positive, it indicates that the formation is floating up, and when it is negative, it indicates that the formation is sinking. V i ( x, y, z, t i ) is positive, it indicates that the formation is floating up, and when it is negative, it indicates that the formation is sinking.

4. The construction control method of anti-floating anchor based on distributed displacement monitoring according to claim 1, characterized in that, In step S3, the generation of the visualization heat map is by an interpolation algorithm to convert discrete data into continuous data, and according to the values of the parameters S i ( x, y, z, t i ), Δ S i ( x, y, z, t i ) and V i ( x, y, z, t i ) determines the color of each pixel on the visualization heat map.

5. The construction control method of anti-floating anchor based on distributed displacement monitoring according to claim 1, characterized in that, In step S4, the convolutional neural network model includes an image input layer, a convolutional layer, a pooling layer and a fully connected layer; the image input layer is the first layer of the convolutional neural network model, used to receive the visual heat map; the convolutional layer is located after the image input layer, used to extract local features in the visual heat map; the pooling layer is located after the convolutional layer, used to reduce the spatial dimension of the feature map and retain important feature information; the fully connected layer is located at the end of the convolutional neural network model, used for comprehensive and classification of feature information; the training data of the convolutional neural network model comes from historical engineering data under similar geological conditions.

6. The construction control method of anti-floating anchor based on distributed displacement monitoring according to claim 1, characterized in that, In step S4, the decision logic of the microcomputer control module includes: if Δ S i ( x, y, z, t i ) exceeds its allowable value [Δ S u ] or V i ( x, y, z, t i ) exceeds its allowable value [Δ V u ], it is determined as a displacement abnormal area, and the voltage applied to the anti-floating anchor system in the area is increased; if Δ S u ( x, y, z, t i ) exceeds its allowable value [Δ S u ] or V i ( x, y, z, t i ) exceeds the allowable value [Δ V s ], it is determined as a displacement abnormal area, and the voltage applied to the anti-floating anchor system in the area is reduced.

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