Digital intelligent type full-recovery multi-cycle deep foundation pit supporting structure and monitoring method

Abstract

The invention provides a digital intelligent type full-recovery multi-cycle deep foundation pit supporting structure and a monitoring method, and belongs to the technical field of foundation pits. A one-to-one correspondence relationship between each component and respective monitoring data is established through an RFID electronic tag, and the perpendicularity of the supporting structure is monitored by using a tilt angle sensor; an unmanned aerial vehicle is used for carrying a three-dimensional laser scanner and a ground three-dimensional laser scanner to monitor the flatness change and deformation and displacement conditions of a supporting structure, monitoring data obtained through monitoring are sent to a data processing center, and the data processing center monitors the monitoring data of each component in real time and carries out early warning. Through multi-technology fusion, digital identification, data association, real-time monitoring, three-dimensional deformation analysis and intelligent early warning of supporting structural members are realized, the safety and stability of foundation pit construction are ensured, the cyclic utilization rate of the members is improved, and compared with the problem that data cannot be associated and integrated in a traditional monitoring method, the method has the advantage that the monitoring accuracy is improved. The monitoring method fills the blank.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pits, and specifically relates to a digital and intelligent fully recyclable multi-cycle deep foundation pit support structure and monitoring method. Background Technique

[0002] The concept of fully recyclable multi-cycle requires that the design and construction of the support structure must consider the recyclability of materials and the reusability of the structure. Traditional support structures are usually discarded after the project is completed, resulting in high carbon emissions and a large amount of waste treatment costs. The fully recyclable multi-cycle foundation pit support steel structure has gradually become one of the mainstream technologies for foundation pit support due to its high efficiency, environmental protection and economy. In the fully recyclable multi-cycle foundation pit support structure, steel sheet piles and H-shaped steel are commonly used support components, and the stability of the support steel structure is crucial. During the construction process, the steel sheet piles and H-shaped steel are driven into the soil by a pile driver. Due to uneven soil layers or changes in soil layer properties, such as density, strength, compressibility, etc., it may cause the steel sheet piles to be subjected to uneven resistance during driving, resulting in inclination, or the verticality may change due to the influence of pile driving equipment and pile driving methods; similarly, when the construction process is affected by external forces or uneven settlement of the foundation, it will also cause the flatness of the H-shaped steel to change. Therefore, it is necessary to monitor and adjust the verticality and flatness. However, traditional monitoring methods mostly rely on manual inspections or single sensors, and there are the following problems: 1. Data island: The monitoring data is not associated with the component information, that is, there is a problem that data cannot be associated and integrated among components, monitoring instruments, and monitoring systems, and it is difficult to trace the deformation history of specific components; 2. Low efficiency: The manual measurement period is long and real-time feedback is not possible; 3. Incomplete coverage: It is difficult to obtain the overall deformation trend of the top and side of the foundation pit through ground monitoring; 4. Difficult to recycle: The lack of a unique identifier for components affects the recycling efficiency.

[0003] Therefore, there is an urgent need for an intelligent and high-precision monitoring method in the fully recyclable multi-cycle foundation pit support structure to timely grasp the deformation of each component of the support structure and truly implement the concept of component recycling. Thus, we propose a digital and intelligent fully recyclable multi-cycle deep foundation pit support structure and monitoring method. Summary of the Invention

[0004] The purpose of the present invention is to provide a digital and intelligent fully recyclable multi-cycle deep foundation pit support structure and monitoring method to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: The present invention provides a digital and intelligent fully recyclable multi-cycle deep foundation pit support structure, which includes a steel plate support row pile, a first row of steel section support row piles, and a second row of steel section support row piles. The first row of steel section support row piles is arranged on one side of the steel plate support row pile, and the second row of steel section support row piles is arranged on the side of the first row of steel section support row piles away from the steel plate support row pile. A plurality of waist beams are fixedly arranged between the first row of steel section support row piles and the second row of steel section support row piles. One side of the plurality of waist beams is fixedly connected to the first row of steel section support row piles, and the side of the plurality of waist beams away from the first row of steel section support row piles is fixedly connected to the second row of steel section support row piles.

[0006] Furthermore, the steel plate support row pile includes a plurality of steel sheet piles, and the steel sheet piles are sequentially connected end to end in a bite manner. The first row of steel section support row piles includes a plurality of first H-shaped steels arranged at intervals, and the second row of steel section support row piles includes a plurality of second H-shaped steels arranged at intervals. The first H-shaped steels are arranged inside the steel sheet piles, and each second H-shaped steel is arranged opposite to the corresponding first H-shaped steel.

[0007] The present invention also provides a monitoring method for a digital and intelligent fully recyclable multi-cycle deep foundation pit support structure. The method is used to monitor the digital and intelligent fully recyclable multi-cycle deep foundation pit support structure as described above, and includes the following steps: S1: Install RFID electronic tags on each component of the digital and intelligent fully recyclable multi-cycle deep foundation pit support structure, and use the RFID electronic tags to establish a one-to-one correspondence between each component and its respective monitoring data for tracking and analyzing the deformation of each component. S2: Determine the monitoring items of the digital and intelligent fully recyclable multi-cycle deep foundation pit support structure. The monitoring items include flatness, verticality, and the deformation and displacement of the support structure. S3: Use inclination sensors to monitor the verticality of the steel sheet piles, the first H-shaped steels, and the second H-shaped steels, and use an unmanned aerial vehicle equipped with a three-dimensional laser scanner and a ground three-dimensional laser scanner to monitor the change in flatness and the deformation and displacement of the support structure. S4: Send the monitored data to the data processing center, and the data processing center monitors the monitoring data of each component in real time and issues early warnings.

[0008] Furthermore, the specific content of step S3 includes: Inclinometers are fixedly installed at the top and bottom of the steel sheet piles, and inclinometers are fixedly installed on the inner sides of the flanges on both sides of the first H-shaped steel and the second H-shaped steel. The perpendicularity deviations of the steel sheet piles, the first H-shaped steel, and the second H-shaped steel are obtained through the inclinometers. A three-dimensional laser scanner is carried by a drone to obtain three-dimensional data of the top and sides of the foundation pit, and a ground three-dimensional laser scanner is used to scan the three-dimensional data of the bottom of the foundation pit. A three-dimensional model of the foundation pit is generated through the three-dimensional data, and the three-dimensional models of different periods are compared and analyzed to obtain the flatness change, deformation, and displacement conditions of the support structure.

[0009] Further, the inclinometers collect data every 30 minutes at set time intervals and record the perpendicularity deviations of the steel sheet piles, the first H-shaped steel, and the second H-shaped steel.

[0010] Further, in step S4, a perpendicularity deviation warning threshold is set in the data processing center, and the perpendicularity deviation is set to be less than or equal to 0.5%. If the monitoring data of the perpendicularity deviation exceeds the preset threshold, the data processing center issues an alarm signal to remind the staff to take measures.

[0011] Further, in step S4, a flatness deviation warning threshold is set in the data processing center, and the flatness deviation is set to be less than or equal to 5 mm. If the monitoring data of the flatness exceeds the preset threshold, the data processing center issues an alarm signal to remind the staff to take measures.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. Each component of the digital intelligent fully recyclable multi-cycle deep foundation pit support structure is uniquely identified by using RFID electronic tags to establish a unique digital identity for each component, and a one-to-one correspondence between each component and its respective monitoring data is established through the RFID electronic tags, realizing the "one thing, one code" full-life cycle management. The staff can track and analyze the deformation conditions of each component, achieving intelligent data management. When the digital intelligent fully recyclable multi-cycle deep foundation pit support structure completes its support function, each component with an RFID electronic tag is removed. The staff queries the deformation conditions of the components through the RFID electronic tags, identifies and classifies the components that can be recycled, and uses the selected components in new projects. By recycling the components with RFID electronic tags, it helps to improve the construction efficiency, reduce the production demand for new steel, and reduce the carbon footprint of the entire project.

[0013] 2. The inclinometer can monitor the verticality deviation of the deep foundation pit support structure. The unmanned aerial vehicle equipped with a three-dimensional laser scanner combined with the ground three-dimensional laser scanner can quickly obtain the three-dimensional data of the top, side, and bottom of the foundation pit. By comparing and analyzing the three-dimensional models in different periods, the flatness change, deformation, and displacement of the support structure can be obtained. Through the combination of the inclinometer and the three-dimensional laser scanner, the two complement each other to ensure the comprehensiveness and accuracy of the monitoring data. Compared with the traditional monitoring method, the monitoring efficiency is greatly improved, and the monitoring cycle is shortened.

[0014] 3. When the data processing center detects abnormal data, it automatically sends out an alarm signal to timely remind the staff to take measures, which can effectively avoid safety accidents caused by human negligence and ensure the safety of the foundation pit construction.

[0015] 4. Generally speaking, the monitoring method provided by the present invention integrates an inclinometer, an RFID electronic tag, an unmanned aerial vehicle equipped with a three-dimensional laser scanner, a ground three-dimensional laser scanner, and a data processing center. Through multi-technology integration, it realizes the digital identification, data association, real-time monitoring, three-dimensional deformation analysis, and intelligent early warning of the components of the digital intelligent fully recovered multi-cycle deep foundation pit support structure, ensuring the safety and stability of the foundation pit construction, improving the component recycling rate. Compared with the traditional monitoring method where the data between components, monitoring instruments, and monitoring systems cannot be associated and integrated, this monitoring method fills this gap. Description of the Drawings

[0016] Figure 1 It is a flowchart of the monitoring method according to the embodiment of the present invention; Figure 2 It is a schematic structural diagram of the deep foundation pit support structure according to the embodiment of the present invention; Figure 3 It is a top view schematic diagram of the deep foundation pit support structure according to the embodiment of the present invention; Figure 4 It is a schematic structural diagram of the steel sheet pile and the first H-shaped steel according to the embodiment of the present invention; Figure 5 It is a top view schematic diagram of the steel sheet pile and the first H-shaped steel according to the embodiment of the present invention; Figure 6 It is a schematic diagram of installing an RFID electronic tag on the waist beam according to the embodiment of the present invention.

[0017] In the figure: 1. Steel plate support row piles, 11. Steel sheet piles, 2. First row of section steel support row piles, 21. First H-shaped steel, 3. Second row of section steel support row piles, 31. Second H-shaped steel, 4. Waist beam, 5. RFID electronic tag, 6. Inclinometer. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. In this article, terms such as "left, right, up, down, front, and back" are established based on the positional relationship shown in the accompanying drawings. Depending on the different accompanying drawings, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as an absolute limitation of the protection scope.

[0019] Please refer to Figures 1 to 6 , this embodiment provides a digital and intelligent fully recyclable multi-cycle deep foundation pit support structure, which includes a steel plate support row pile 1, a first row of steel section support row piles 2, a second row of steel section support row piles 3, and a plurality of waist beams 4. The first row of steel section support row piles 2 is arranged on one side of the steel plate support row pile 1, and the second row of steel section support row piles 3 is arranged on the side of the first row of steel section support row piles 2 away from the steel plate support row pile 1. A plurality of waist beams 4 are fixedly installed between the first row of steel section support row piles 2 and the second row of steel section support row piles 3. One side of the plurality of waist beams 4 is fixedly connected to the first row of steel section support row piles 2, and the side of the plurality of waist beams 4 away from the first row of steel section support row piles 2 is fixedly connected to the second row of steel section support row piles 3. The steel plate support row pile 1, the first row of steel section support row piles 2, the second row of steel section support row piles 3, and the plurality of waist beams 4 form a multi-layer frame structure after construction.

[0020] Specifically, the steel plate support row pile 1 includes a plurality of steel sheet piles 11 vertically driven into the soil body, and the steel sheet piles 11 are sequentially connected end to end in a bite manner. The first row of steel section support row piles 2 includes a plurality of first H-shaped steels 21 vertically driven into the soil body. The first H-shaped steels 21 are arranged inside the steel sheet piles 11 and are spaced apart. During construction, the method of driving one and inserting one is adopted. The second row of steel section support row piles 3 includes a plurality of second H-shaped steels 31 vertically driven into the soil body. The second H-shaped steels 31 are spaced apart, and each second H-shaped steel 31 is arranged opposite to the corresponding first H-shaped steel 21. During construction, the method of driving one and inserting one is adopted. The waist beam 4 is an H-shaped steel and is horizontally installed during construction. The flange on one side of the waist beam 4 is fixedly connected to the flange on the side of the first H-shaped steel 21 away from the steel plate support row pile 1, and the flange on the other side of the waist beam 4 is fixedly connected to the flange on one side of the second H-shaped steel 31.

[0021] This embodiment also provides a monitoring method for a digital and intelligent fully recyclable multi-cycle deep foundation pit support structure. The method is used to monitor the above-mentioned digital and intelligent fully recyclable multi-cycle deep foundation pit support structure, and includes the following steps: S1: Install RFID electronic tags 5 on each component of the digital intelligent fully recycled multi-cycle deep foundation pit support structure, and use the RFID electronic tags 5 to establish a one-to-one correspondence between each component and its respective monitoring data for tracking and analyzing the deformation of each component.

[0022] Specifically, the RFID electronic tags 5 installed on each component are ultra-thin flexible anti-metal RFID electronic tags 5. The RFID electronic tags 5 can store information such as the specification model, installation location, and design parameters of each component for uniquely identifying the corresponding component. Specifically, the ultra-thin flexible anti-metal RFID electronic tags 5 are embedded in the steel sheet piles 11 to form prefabricated steel sheet piles 11 containing RFID electronic tags 5. During the production process of the steel sheet piles 11, holes with dimensions of 120×15×8 mm are reserved. The holes are located at the inner edge of the locking buckle of the steel sheet piles 11. The ultra-thin flexible anti-metal RFID electronic tags 5 are embedded in the reserved holes, and then the holes are sealed with corrosion-resistant sealant to ensure that the tags are not affected by environmental factors. The ultra-thin flexible anti-metal RFID electronic tags 5 are embedded in the first H-shaped steel 21 and the second H-shaped steel 31 to form prefabricated first H-shaped steel 21 and second H-shaped steel 31 containing RFID electronic tags 5. During the production process of the first H-shaped steel 21 and the second H-shaped steel 31, holes with dimensions of 120×15×8 mm are reserved. The holes are located at the flange edges of the first H-shaped steel 21 and the second H-shaped steel 31. The ultra-thin flexible anti-metal RFID electronic tags 5 are embedded in the reserved holes, and then the holes are sealed with corrosion-resistant sealant to ensure that the tags are not affected by environmental factors. The ultra-thin flexible anti-metal RFID electronic tags 5 are embedded in the crossbeam 4 to form a prefabricated crossbeam 4 containing RFID electronic tags 5. During the production process of the crossbeam 4, holes with dimensions of 120×15×8 mm are reserved. The holes are located at the center positions of the two flanges of the crossbeam 4. The ultra-thin flexible anti-metal RFID electronic tags 5 are embedded in the reserved holes, and then the holes are sealed with corrosion-resistant sealant to ensure that the tags are not affected by environmental factors.

[0023] Specifically, the ultra-thin flexible anti-metal RFID electronic tags 5 have the advantages of good anti-metal property, excellent performance, good directivity, long reading distance, etc. They are equipped with high-frequency RFID readers and antennas and are not restricted or affected by the number of tags in the working area. They do not require a battery, the memory can be erased and rewritten more than 10,000 times, the effective service life reaches more than ten years, and the cost performance is high. Each RFID electronic tag 5 has a unique identifier (ID), and this ID is programmed into the chip of the tag during tag production to ensure the uniqueness of each tag.

[0024] Specifically, before each component of the support structure is inserted into the soil, information such as the size, shape, material, and initial position of the component is programmed into its respective RFID electronic tag 5 to uniquely identify each component. Then, the information of each component is entered into the database to establish a component information file, and the component information is associated with the monitoring data to establish a one-to-one correspondence between each component and its respective monitoring data, facilitating accurate tracking and analysis of the deformation of each component by the staff. After the support structure is driven into the soil, high-frequency RFID readers are installed at the center position of the web of the girt 4. During the construction of the foundation pit, the RFID readers read the information in the RFID electronic tags 5 installed on the sheet piles 11, the first H-shaped steel 21, the second H-shaped steel 31, and the girt 4 through wireless signals, and the RFID readers transmit the read information to the data processing center for archiving and storage. When the support structure completes its support function, the prefabricated components containing RFID electronic tags 5 are removed, and the staff can quickly identify and classify the components that can be recycled according to the RFID electronic tags 5, and then recycle them in new projects.

[0025] Specifically, by using the RFID electronic tag 5 to uniquely identify each component of the digital intelligent fully recyclable multi-cycle deep foundation pit support structure, establishing the unique digital identity of each component, and establishing a one-to-one correspondence between each component and its respective monitoring data through the RFID electronic tag 5, the "one thing, one code" full-life cycle management is realized. The staff can track and analyze the deformation of each component, realizing intelligent data management. When the digital intelligent fully recyclable multi-cycle deep foundation pit support structure completes its support function, each component installed with the RFID electronic tag 5 is removed. The staff queries the deformation of the component through the RFID electronic tag 5, identifies and classifies the components that can be recycled, and uses the selected components in new projects. By recycling the components with RFID electronic tags 5, it helps to improve the construction efficiency, reduce the production demand for new steel, and reduce the carbon footprint of the entire project.

[0026] S2: Determine the monitoring items of the digital intelligent fully recyclable multi-cycle deep foundation pit support structure. The monitoring items include flatness, verticality, and the deformation and displacement of the support structure.

[0027] S3: Use the inclination sensor 6 to monitor the verticality of the sheet piles 11, the first H-shaped steel 21, and the second H-shaped steel 31, and use the drone-mounted three-dimensional laser scanner and the ground three-dimensional laser scanner to monitor the change in flatness and the deformation and displacement of the support structure.

[0028] Specifically, the step S3 specifically includes: Inclinometers 6 are fixedly installed at the top and bottom of the steel sheet pile 11, and inclinometers 6 are fixedly installed on the inner sides of the flanges on both sides of the first H-beam 21 and the second H-beam 31. The inclination angles (i.e., perpendicularity deviations) of the top and bottom of the steel sheet pile 11, the first H-beam 21, and the second H-beam 31 relative to the horizontal plane are obtained through the inclinometers 6 to ensure that the steel sheet pile 11, the first H-beam 21, and the second H-beam 31 are in a vertical state. In this embodiment, the inclinometers 6 are fixedly installed on the surfaces of the steel sheet pile 11, the first H-beam 21, and the second H-beam 31 by welding to ensure that the inclinometers 6 are in close contact with the surface of the member to obtain accurate measurement results. The inclinometers 6 automatically collect data every 30 minutes at a predetermined time interval to record the perpendicularity of the steel sheet pile 11, the first H-beam 21, and the second H-beam 31. The inclinometers 6 transmit the data to the data processing center in real time via wireless signals. The data processing center associates the component ID information with the monitoring data of the inclinometers 6 to facilitate the staff to query and analyze the perpendicularity changes of each component.

[0029] A drone is used to carry a three-dimensional laser scanner to quickly obtain the three-dimensional data of the top and sides of the foundation pit according to the preset flight route and height, and a ground three-dimensional laser scanner is used to obtain the three-dimensional data of the bottom of the foundation pit to ensure full coverage. The airborne three-dimensional laser scanner and the ground three-dimensional laser scanner transmit the three-dimensional data to the data processing center. The data processing center processes the received three-dimensional data to generate three-dimensional models of the foundation pit at different times. By comparing and analyzing the three-dimensional models at different times, the flatness changes, deformations, and displacements of the supporting structure can be visually observed. The data processing center associates the component ID information with the monitoring data of the three-dimensional laser scanner to facilitate the staff to query and analyze the flatness changes, deformations, and displacements of each component.

[0030] Specifically, the inclinometers 6 can monitor the perpendicularity deviation of the deep foundation pit supporting structure. The drone carrying a three-dimensional laser scanner combined with the ground three-dimensional laser scanner can quickly obtain the three-dimensional data of the top, sides, and bottom of the foundation pit. By comparing and analyzing the three-dimensional models at different times, the flatness changes, deformations, and displacements of the supporting structure can be obtained. Through the combination of the inclinometers 6 and the three-dimensional laser scanner, the two complement each other to ensure the comprehensiveness and accuracy of the monitoring data. Compared with the traditional monitoring methods, the monitoring efficiency is greatly improved and the monitoring cycle is shortened.

[0031] S4: Send the monitored data to the data processing center, and the data processing center monitors the monitored data of each component in real time and gives early warnings.

[0032] Specifically, a verticality deviation warning threshold is set in the data processing center, with the verticality deviation set to be less than or equal to 0.5%. If the monitored data of the verticality deviation exceeds the preset threshold, the data processing center sends an alarm signal through the PC terminal to remind the on-site staff of the abnormal information of the foundation pit. The staff takes corresponding measures according to the alarm signal and feeds back the processing results to the data processing center so that the data processing center can update the database and continue monitoring. A flatness deviation warning threshold is set in the data processing center, with the flatness deviation set to be less than or equal to 5 mm. If the monitored data of the flatness exceeds the preset threshold, the data processing center sends an alarm signal through the PC terminal to remind the on-site staff of the abnormal information of the foundation pit. The staff takes corresponding measures according to the alarm signal and feeds back the processing results to the data processing center so that the data processing center can update the database and continue monitoring. When the data processing center detects abnormal data, it automatically sends an alarm signal to promptly remind the staff to take measures, which can effectively avoid safety accidents caused by human negligence and ensure the safety of the foundation pit construction.

[0033] Specifically, generally speaking, the monitoring method provided by the present invention integrates an inclination sensor 6, an RFID electronic tag 5, a drone-mounted three-dimensional laser scanner, a ground three-dimensional laser scanner, and a data processing center. Through multi-technology integration, it realizes the digital identification, data association, real-time monitoring, three-dimensional deformation analysis, and intelligent warning of the components of the digital full-recovery multi-cycle deep foundation pit support structure, ensuring the safety and stability of the foundation pit construction, improving the recycling rate of the components, and filling the gap in the problem that data cannot be associated and integrated among components, monitoring instruments, and monitoring systems in the traditional monitoring method.

[0034] The above embodiments only illustrate the basic principles and characteristics of the present invention, but are not limited by the above embodiments. It should be understood that for those of ordinary skill in the art, various changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital intelligent fully recycled multi-cycle deep foundation pit support structure, characterized in that, It includes a steel sheet pile retaining row (1), a first row of steel section pile retaining row (2) and a second row of steel section pile retaining row (3). The first row of steel section pile retaining row (2) is arranged on one side of the steel sheet pile retaining row (1), and the second row of steel section pile retaining row (3) is arranged on the side of the first row of steel section pile retaining row (2) away from the steel sheet pile retaining row (1). A number of waist beams (4) are fixedly arranged between the first row of steel section pile retaining row (2) and the second row of steel section pile retaining row (3). One side of the number of waist beams (4) is fixedly connected to the first row of steel section pile retaining row (2), and the side of the number of waist beams (4) away from the first row of steel section pile retaining row (2) is fixedly connected to the second row of steel section pile retaining row (3).

2. The digital and intelligent fully recycled multi-cycle deep foundation pit support structure according to claim 1, characterized in that, The steel sheet pile retaining row (1) includes a number of steel sheet piles (11), and the steel sheet piles (11) are sequentially connected end to end in a bite. The first row of steel section pile retaining row (2) includes a number of first H-shaped steels (21) arranged at intervals, and the second row of steel section pile retaining row (3) includes a number of second H-shaped steels (31) arranged at intervals. The first H-shaped steels (21) are arranged inside the steel sheet piles (11), and each second H-shaped steel (31) is arranged opposite to the corresponding first H-shaped steel (21).

3. A monitoring method for the digital and intelligent fully recycled multi-cycle deep foundation pit support structure described in any one of claims 1-2, characterized in that, It includes the following steps: S1: Install RFID electronic tags (5) on each component of the digital intelligent fully recycled multi-cycle deep foundation pit retaining structure, and use the RFID electronic tags (5) to establish a one-to-one correspondence between each component and its respective monitoring data for tracking and analyzing the deformation of each component; S2: Determine the monitoring items of the digital intelligent fully recycled multi-cycle deep foundation pit retaining structure. The monitoring items include flatness, verticality, and the deformation and displacement of the retaining structure; S3: Use inclinometers (6) to monitor the verticality of the steel sheet piles (11), the first H-shaped steels (21) and the second H-shaped steels (31), and use an unmanned aerial vehicle equipped with a three-dimensional laser scanner and a ground three-dimensional laser scanner to monitor the change in flatness and the deformation and displacement of the retaining structure; S4: Send the monitored data to the data processing center, and the data processing center monitors the monitoring data of each component in real time and issues early warnings.

4. The monitoring method of the digital and intelligent fully recycled multi-cycle deep foundation pit support structure according to claim 3, characterized in that, The specific content of step S3 includes: Fix and install inclinometers (6) at the top and bottom of the steel sheet piles (11), and fix and install inclinometers (6) on the inner sides of the flanges on both sides of the first H-shaped steels (21) and the second H-shaped steels (31). Obtain the verticality deviation of the steel sheet piles (11), the first H-shaped steels (21) and the second H-shaped steels (31) through the inclinometers (6); use an unmanned aerial vehicle equipped with a three-dimensional laser scanner to obtain the three-dimensional data of the top and sides of the foundation pit, use a ground three-dimensional laser scanner to scan the three-dimensional data of the bottom of the foundation pit, generate a three-dimensional model of the foundation pit through the three-dimensional data, and compare and analyze the three-dimensional models of different periods to obtain the change in flatness and the deformation and displacement of the retaining structure.

5. The monitoring method of the digital intelligent fully recycled multi-cycle deep foundation pit support structure according to claim 4, characterized in that, The inclinometers (6) collect data every 30 minutes at a set time interval and record the verticality deviation of the steel sheet piles (11), the first H-shaped steels (21) and the second H-shaped steels (31).

6. The monitoring method of the digital and intelligent fully recycled multi-cycle deep foundation pit support structure according to claim 3, characterized in that, In step S4, a warning threshold for perpendicularity deviation is set in the data processing center, with the perpendicularity deviation set to be less than or equal to 0.5%. If the monitored data of the perpendicularity deviation exceeds the preset threshold, the data processing center issues an alarm signal to remind the staff to take measures.

7. The monitoring method of the digital and intelligent fully recycled multi-cycle deep foundation pit support structure according to claim 6, characterized in that, In step S4, a warning threshold for flatness deviation is set in the data processing center, with the flatness deviation set to be less than or equal to 5 mm. If the monitored data of the flatness exceeds the preset threshold, the data processing center issues an alarm signal to remind the staff to take measures.

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