Novel steel support supporting structure capable of intelligently controlling supporting position

Abstract

The invention provides a novel steel support supporting structure capable of intelligently controlling the supporting position, which comprises an enclosure structure, the inner wall of the enclosure structure is in sliding connection with multiple layers of two-way #-shaped steel supports arranged at intervals, the multiple layers of two-way #-shaped steel supports realize longitudinal connection and longitudinal movement through a position adjusting device, and the outer wall of the enclosure structure is provided with a displacement sensor. The displacement sensor is connected with the control system and used for obtaining lateral displacement data of the enclosure structure, the length of the position adjusting device is controlled according to the lateral displacement data of the enclosure structure, and then the depth of the two-way #-shaped steel support is adjusted. The arrangement position of the internal horizontal support can be intelligently adjusted according to the lateral deformation of the support enclosure structure, so that the lateral deformation of the enclosure structure is intelligently optimized, and the safety of a foundation pit support system is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a novel steel support structure with intelligently controlled support positions. Background Art

[0002] In recent years, with the acceleration of urbanization and the continuous advancement of large-scale infrastructure projects, the development and utilization of urban underground space has become increasingly extensive and in-depth. In this context, the requirements for foundation pit support technology have also increased. As the size and depth of foundation pits continue to increase, ensuring the overall safety and stability of foundation pits has become a major challenge, and the importance of support structures in the foundation pit excavation process has become increasingly prominent.

[0003] In foundation pit engineering, the internal force state of the surrounding soil, support and retaining structures will continue to change as the excavation progresses, and the maximum position of stress and deformation in the foundation pit will also be dynamically adjusted. Therefore, during the construction process, it is necessary to flexibly adjust the layout of the support structure to prevent excessive deformation of the foundation pit, thereby avoiding the occurrence of safety accidents.

[0004] The foundation pit support structure usually consists of two parts: the retaining structure and the support system. Steel support, as the key part of the support structure, has excellent bearing capacity and stability. However, during the excavation and support of deep foundation pits, due to the large depth of the foundation pit, the stress and deformation of the retaining structure will continue to change with the increase of excavation depth and the layer-by-layer setting of internal supports. The traditional internal support position is fixed and cannot be adjusted according to the deformation of the retaining structure, which brings great limitations in actual engineering.

[0005] In addition, if the design of the support system is unreasonable, it may also lead to the problem of local stress concentration in the foundation pit support system, resulting in a large difference between the actual deformation during the construction process and the design value, and may even cause construction safety hazards, ultimately leading to major engineering accidents caused by excessive deformation of the support structure. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a new type of steel support structure with intelligent control of support position, which can intelligently adjust the layout position of internal horizontal supports according to the lateral deformation of the supporting enclosure structure, thereby intelligently optimizing the lateral deformation of the enclosure structure and ensuring the safety of the foundation pit support system.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new type of steel support structure with intelligent control of support position, including a retaining structure, wherein the inner wall of the retaining structure is slidably connected with multiple layers of spaced-apart bidirectional tic-tac-toe steel supports, the multiple layers of bidirectional tic-tac-toe steel supports are longitudinally connected and longitudinally moved through a position adjustment device, a displacement sensor is arranged on the outer wall of the retaining structure, the displacement sensor is connected to the control system for obtaining lateral displacement data of the retaining structure, the length of the position adjustment device is controlled according to the lateral displacement data of the retaining structure, and then the depth of the bidirectional tic-tac-toe steel supports is adjusted.

[0008] Furthermore, the bidirectional cross-shaped steel support includes four cross-shaped support rods, and connecting ends are arranged at both ends of each support rod, and the connecting ends are slidably connected to the enclosure structure.

[0009] Furthermore, guide rails are longitudinally arranged on the inner wall of the enclosure structure, the number and position of the guide rails match the number and position of the support rods, and multiple groups of reserved holes are opened on both sides of the guide rails; position fixing devices are arranged on both sides of the connecting end, and the position fixing devices are clamped with the reserved holes of the guide rails.

[0010] Furthermore, the position fixing device is two limit balls connected by springs, and the two limit balls are correspondingly engaged with the reserved holes on both sides of the guide rail. The diameter of the limit balls is smaller than half of the inner diameter of a single support rod of the bidirectional cross steel support.

[0011] Furthermore, the position adjustment device includes a support frame and a support position adjuster. The support frame is supported on the top of the enclosure structure. The support frame and the top bidirectional cross-shaped steel support and the multiple internal top bidirectional cross-shaped steel supports are connected through the support position adjuster. The pressure sensor is arranged on the support position adjuster. The pressure sensor is connected to the control system for monitoring the axial force of the support position adjuster.

[0012] Furthermore, the support position regulator is also provided with a drive motor, a length adjustment device and a screw seat. The drive motor is connected to the screw seat through the length adjustment device. The control system adjusts the extension length of the screw seat by controlling the length adjustment device through the opening and closing of the drive motor.

[0013] Furthermore, the length adjustment device includes a force transmission screw and a screw nut. The driving motor is connected to one end of the force transmission screw through a coupling. The force transmission screw is fixed in the support position adjuster through a bearing seat. The other end of the force transmission screw is connected to the screw seat through a screw nut. The pressure sensor is arranged between the screw seat and the screw nut.

[0014] Furthermore, the control system includes an axial force control panel, a displacement collector and control software. The displacement sensor is connected to the displacement collector via a wire to measure the lateral displacement of the enclosure structure; the pressure sensor is connected to the axial force control panel via a wire to obtain the axial force of the position adjustment device; the axial force control panel and the displacement collector are connected to the control software via a wire. The control software is used to obtain the lateral displacement data of the enclosure structure and the axial force data of the position adjustment device. When the measured value of the lateral displacement data is greater than the design value, the axial force control panel controls the position adjustment device to adjust the longitudinal position of one or more layers of bidirectional cross-shaped steel supports.

[0015] The present invention also provides a foundation pit support method, which adopts the above-mentioned new steel support structure with intelligent control of support position for support, and the specific steps are as follows: Step 1: The displacement sensor measures the lateral displacement data of the enclosure structure, and the control system obtains the lateral displacement data of each depth of the enclosure structure; Step 2: The control system compares the measured values ​​of the lateral displacement data at each depth of the enclosure structure with the design values, adjusts the axial force of the position adjustment device according to the comparison result, and then changes the support length of the position adjustment device to achieve the change of the longitudinal position of the bidirectional cross steel support 5.

[0016] Furthermore, 1) when the measured value of the lateral displacement data of the retaining structure at a certain depth is greater than the design value: The control system adjusts the axial force of the position adjustment device. When the length of the position adjustment device increases, the distance between the multiple bidirectional cross supports increases or the height of the bidirectional cross steel support decreases; when the length of the position adjustment device decreases, the distance between the multiple bidirectional cross supports decreases or the height of the bidirectional cross steel support increases. When the measured value of the lateral displacement data of the corresponding depth obtained by the control system is less than or equal to the design value, it means that the position adjustment of the bidirectional cross steel support is appropriate, and the control system closes the position adjustment device; 2) When the measured value of the lateral displacement data of the retaining structure at a certain depth obtained by the control system is less than or equal to the design value, the control system and the position adjustment device will not operate.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention proposes a new type of steel support structure with intelligent control of support position, which improves the traditional foundation pit support structure and realizes real-time monitoring and intelligent response to the lateral deformation of the enclosure structure by integrating displacement sensors, pressure sensors, control systems and position adjustment devices. The control system can automatically adjust the axial force and length of the position adjustment device according to the data provided by the displacement sensor, thereby intelligently adjusting the longitudinal position of the bidirectional cross steel support to adapt to the deformation requirements of the enclosure structure.

[0018] The bidirectional cross-shaped steel support of the present invention adopts a cross-shaped support rod design, which enhances the overall stability and bearing capacity of the support structure. The connecting ends of the support rods are slidably connected to the surrounding structure, which is convenient for position adjustment as needed.

[0019] The position adjustment device of the present invention includes components such as a support frame, a support position regulator, a drive motor, a length adjustment device and a screw seat, which can realize precise adjustment of the bidirectional cross-shaped steel support position; the pressure sensor integrated inside the support position regulator can monitor the axial force changes in real time to ensure the accuracy and safety of the adjustment process.

[0020] The setting of the guide rail in the present invention enables the bidirectional cross-shaped steel support to slide and adjust its position along a predetermined trajectory, and the position fixing device (such as a limit ball connected by a spring) is engaged with the reserved hole of the guide rail, thereby fixing and locking the position of the bidirectional cross-shaped steel support and improving the stability and reliability of the support structure.

[0021] The control system of the present invention includes components such as an axial force control panel, a displacement acquisition instrument and control software, which realize comprehensive monitoring and intelligent control of the support structure status. The control software can simultaneously read the axial force of the support position adjuster and the lateral deformation data of the surrounding structure. By comparing the measured value with the design value, the intelligent control axial force control panel adjusts the axial force and length of the support position adjuster.

[0022] When the steel support structure of the present invention is used for foundation pit support, the lateral displacement data of the retaining structure is monitored in real time by a displacement sensor, and the data is transmitted to the control system in real time. The control system intelligently adjusts the axial force and length of the position adjustment device according to the monitoring data to realize intelligent control of the position of the bidirectional cross steel support. During the support process, the support structure can actively adjust the support position according to the deformation of the retaining structure to realize intelligent control. At the same time, the support structure also has passive adaptability, and can withstand the deformation pressure of the retaining structure to a certain extent, ensuring the safety of the foundation pit support system. Through the intelligent control system and the precise position adjustment device, the refined management and efficient construction of the support structure are realized, and the construction risk and cost are reduced; the support structure and support method of the present invention are suitable for different types of foundation pit support projects, have strong adaptability and flexibility, and can meet the requirements of different engineering needs and geological conditions by adjusting the parameters and configuration of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of an embodiment of the present invention; Figure 3 This is a cross-sectional structural diagram of a support position adjuster according to an embodiment of the present invention; Figure 4 This is a vertical view of a limiting ball according to an embodiment of the present invention; Figure 5 This is a top view of the limiting ball structure of the embodiment of the present invention; In the attached figure: 1. Enclosure structure; 2. Guide rail; 3. Limit ball; 4. Displacement sensor; 5. Bidirectional cross steel support; 6. Support position adjuster; 7. Support frame; 8. Pulley; 9. Wire; 10. Axial force control panel; 11. Displacement collector; 12. Control software; 13. Drive motor; 14. Coupling; 15. Bearing seat; 16. Force transmission screw; 17. Screw nut; 18. Pressure sensor; 19. Screw seat; 20. External steel pipe; 21. Spring. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1 , 2 As shown, the present invention provides a new type of steel support structure with intelligent control of support position, including a protective structure 1, a guide rail 2, a limit ball 3, a displacement sensor 4, a bidirectional cross-shaped steel support 5, a support position adjuster 6, a support frame 7, a pulley 8, a wire 9, an axial force control panel 10, a displacement collector 11, a control software 12, a drive motor 13, a coupling 14, a bearing seat 15, a force transmission screw 16, a screw nut 17, a pressure sensor 18, a screw seat 19, an external steel pipe 20 and a spring 21.

[0026] Among them, the retaining structure 1 is used to support the soil around the foundation pit; multiple groups of reserved holes are set on both sides of the guide rail 2, and the guide rail 2 is longitudinally installed on the inner wall of the retaining structure 1. The number and position of the guide rail 2 match the number and position of the connecting ends of the two-way cross-shaped steel support 5; multiple two-way cross-shaped steel supports 5 are placed horizontally at intervals in the retaining structure 1, and the two-way cross-shaped steel support 5 includes 4 cross-shaped support rods, and connecting ends are set at both ends of each support rod. The connecting ends extend into the guide rail 2 so that the two-way cross-shaped steel support 5 can move up and down along the guide rail 2, and position fixing devices are set on both sides of the connecting end. The position fixing device can be clamped in the reserved holes of the guide rail 2 to achieve the position fixation of the two-way cross-shaped steel support 5, and a pulley 8 is set on the top of the connecting end to reduce the friction between the connecting end of the two-way cross-shaped steel support 5 and the inner wall of the guide rail 2; the displacement sensor 4 is set on the outer wall of the retaining structure 1 and is connected to the displacement collector 11 through a wire 9, which is used to measure the lateral displacement of the retaining structure 1; like Figure 4 , 5As shown, the position fixing device is two limit balls 3 connected by springs 21, and the springs 21 provide elastic support for the limit balls 3. When reaching the adjusted longitudinal position, the two limit balls 3 are inserted into the reserved holes on both sides of the guide rail 2 to fix the position of the bidirectional cross steel support 5; Preferably, the diameter of the limiting ball 3 is smaller than half of the inner diameter of a single support rod of the bidirectional cross steel support 5 .

[0027] like Figure 3 As shown, the support frame 7 is supported on the top of the enclosure structure 1, and the support frame 7 is used to provide a reaction force for the top support position adjuster 6; the support frame 7 is connected to the top bidirectional cross-shaped steel support 5 through the support position adjuster 6, and multiple bidirectional cross-shaped steel supports 5 are connected through the support position adjuster 6. The two ends of the support position adjuster 6 are welded to the support frame 7 or the bidirectional cross-shaped steel support 5, and the support frame 7 always remains fixed. The height of all the bidirectional cross-shaped steel supports 5 can be changed by telescoping the support position adjuster 6 between the support frame 7 and the top bidirectional cross-shaped steel support 5; after the top support position adjuster 6 is adjusted, the height of the bottom bidirectional cross-shaped steel support 5 can be adjusted by telescoping the support position adjuster 6 between two bidirectional cross-shaped steel supports 5. The horizontal spacing arrangement of multiple bidirectional cross-shaped steel supports 5 and the adjustment of the height of multiple bidirectional cross-shaped steel supports 5 are achieved by adjusting the support position adjuster 6; Preferably, the cross-sectional shape of the foundation pit excavation is generally a quadrilateral. The bidirectional cross-shaped support 5 used in the present invention can not only realize synchronous support in two directions and maintain the integrity of the support structure, but also reduce the workload of internal support construction and installation.

[0028] The support position regulator 6 includes an external steel pipe 20, in which a drive motor 13, a coupling 14, a bearing seat 15, a force transmission screw 16, a screw nut 17, a pressure sensor 18, and a screw seat 19 are arranged, wherein the drive motor 13 is used to provide torque to the force transmission screw 16; the coupling 14 is used to connect the drive motor 13 and the force transmission screw 16; the bearing seat 15 is used to fix the force transmission screw 16 and the external steel pipe 20; the force transmission screw 16 provides an axial thrust to the screw seat 19 through its own rotation; the screw nut 17 is used to connect the force transmission screw 16 and the screw seat 19; the pressure sensor 18 is arranged between the screw seat 19 and the screw nut 17 to measure the magnitude of the axial force of the support position regulator 6, and the pressure sensor 18 is connected to the axial force control panel 10 through the wire 9; the screw seat 19 changes the length of the support displacement regulator 6 through its own axial movement, thereby adjusting the position of the bidirectional well steel support 5; the external steel pipe 20 fixes and protects the support position regulator 6; When the support position adjuster 6 is working, the drive motor 13 is started, the drive motor 13 rotates and applies torque to the force transmission screw 16 through the coupling 14. Since the position of the screw nut 17 is fixed, the rotation of the force transmission screw 16 will change its length on the other side of the screw nut 17. The increase in length pushes the screw seat 19 to extend longitudinally, that is, the length of the support position adjuster 6 is extended, the bidirectional cross-shaped steel support 5 moves longitudinally, the position of the bidirectional cross-shaped steel support 5 is lowered, or the distance between multiple bidirectional cross-shaped steel supports is increased; the decrease in length pushes the screw seat 19 to retract longitudinally, that is, the length of the support position adjuster 6 is shortened, that is, the length of the support position adjuster 6 is reduced, the position of the bidirectional cross-shaped steel support 5 is raised, or the distance between multiple bidirectional cross-shaped steel supports is reduced.

[0029] Among them, the displacement collector 11 is used to collect the lateral displacement data of the enclosure structure 1 measured by the displacement sensor 4; the axial force control panel 10 is used to control the axial force and length of the support displacement regulator 6; the axial force control panel 10 and the displacement collector 11 are connected to the control software 12 through the wire 9, the control software 12 obtains the lateral displacement data of the enclosure structure 1 and the axial force data of the support displacement regulator 6, and compares the measured value and the design value of the lateral displacement data, the axial force control panel 10 adjusts the axial force of the support displacement regulator 6, and changing the axial force will change the support length at the same time.

[0030] Specifically, if the measured value of the lateral displacement data of the retaining structure 1 at a certain depth position is greater than the design value, the control software 12 controls the axial force control panel 10 to start the drive motor 13 to drive the screw seat 19 to produce longitudinal movement, and through the telescopic support position adjuster 6, the horizontal bidirectional cross-shaped steel support 5 is moved to the deformation depth position, and the lateral displacement data of the retaining structure 1 is measured in real time. When the measured value of the lateral displacement data is less than the design value, it means that the support position adjuster 6 has been adjusted to the optimal position, and the adjustment is stopped at this time; if the measured values ​​of the lateral displacement data of the retaining structure 1 do not exceed the design value, the position of the bidirectional cross-shaped steel support 5 is kept unchanged.

[0031] The support position adjuster 6 of the present invention is installed in the middle between multiple internal bidirectional cross-shaped steel supports 5 and the bidirectional cross-shaped steel supports 5. By combining the drive motor 13, force transmission screw 16, screw seat 19 and pressure sensor 18 inside the support position adjuster 6, the active adjustment of the length of the support position adjuster 6 is completed, thereby realizing the intelligent control of the position of the bidirectional cross-shaped steel support 5.

[0032] The bidirectional cross-shaped steel support 5 of the present invention is embedded in the reserved hole of the guide rail 2 through the limiting ball 3, and the limiting balls 3 are connected by springs 21. When the height of the bidirectional cross-shaped steel support 5 coincides with the height of the reserved hole of the guide rail 2, the limiting ball 3 pops out and extends into the reserved hole to fix the position of the bidirectional cross-shaped steel support 5. The diameter of the limiting ball 3 is smaller than half of the inner diameter of a single support rod of the bidirectional cross-shaped steel support 5, ensuring that when the bidirectional cross-shaped steel support 5 moves up and down, the limiting ball 3 will be completely compressed into the inside of the support rod, so that the bidirectional cross-shaped steel support 5 can move up and down.

[0033] The present invention utilizes control software to simultaneously read the axial force of the support position adjuster 6 and the lateral deformation data of the enclosure structure 1. By comparing the measured value of the lateral displacement data with the design value, the control software controls the axial force control panel to adjust the axial force and length of the support position adjuster 6, thereby realizing intelligent adjustment of the bidirectional cross steel support position.

[0034] When a new type of steel support structure with intelligent support position control of the present invention is used for foundation pit support, the specific steps are as follows: Step 1: The displacement collector 11 continuously collects the lateral displacement data of the enclosure structure 1 measured by the displacement sensor 4, and the displacement collector 11 transmits the lateral displacement data to the control software 12 in real time; Step 2: The control software 12 compares the measured values ​​of the lateral displacement data at each depth of the enclosure structure 1 with the design values, specifically the following situations: 1) When the measured value of the lateral displacement data of the enclosure structure 1 at a certain depth position is greater than the design value, the control software 12 sends an electrical signal to control the axial force control panel 10 to start, and the axial force control panel 10 controls the drive motor 13 to start. The drive motor 13 applies torque to the force transmission screw 16 through the coupling 14 to drive the force transmission screw 16 to rotate. However, since the position of the screw nut 17 is fixed, the rotation of the force transmission screw 16 will change its length on the other side of the screw nut 17. When the length increases, the screw seat 19 is pushed to control the longitudinal movement between the multiple bidirectional cross-shaped steel supports 5, and the distance between the multiple bidirectional cross-shaped steel supports 5 increases or the height of the bidirectional cross-shaped steel supports 5 decreases; when the length decreases, the screw seat 19 is pushed to control the longitudinal movement between the multiple bidirectional cross-shaped steel supports 5, that is, the distance between the multiple bidirectional cross-shaped steel supports 5 decreases or the height of the bidirectional cross-shaped steel supports 5 increases.

[0035] The bidirectional cross-shaped steel support 5 moves toward the position where the lateral displacement of the retaining structure 1 is greater than its design value. When the actual value of the lateral displacement data of the corresponding depth obtained by the control software 12 is less than the design value, it means that the position adjustment of the bidirectional cross-shaped steel support 5 is appropriate, and the control software 12 controls the axial force control panel 10 to control the drive motor 13 to turn off.

[0036] 2) When the measured value of the lateral displacement data of the enclosure structure 1 at a certain depth position is less than or equal to the design value, the control software 12, the control axial force control panel 10, and the drive motor 13 do not operate.

[0037] The present invention can intelligently control the position of the bidirectional cross steel support, continuously optimize the support position of the foundation pit in the actual project, thereby finding the best support solution and solving complex foundation pit excavation and support problems.

Claims

1. A new type of steel support structure with intelligent control of support position, characterized in that: The invention comprises a protective structure (1), wherein the inner wall of the protective structure (1) is connected with multiple layers of bidirectional cross-shaped steel supports (5) arranged at intervals, wherein the multiple layers of bidirectional cross-shaped steel supports (5) are longitudinally connected and longitudinally moved by means of a position adjustment device, and a displacement sensor (4) is arranged on the outer wall of the protective structure (1), wherein the displacement sensor (4) is connected to a control system for obtaining lateral displacement data of the protective structure (1), and the length of the position adjustment device is controlled according to the lateral displacement data of the protective structure (1), thereby adjusting the depth of the bidirectional cross-shaped steel supports (5).

2. According to the novel steel support structure with intelligent control of support position according to claim 1, it is characterized in that: The bidirectional cross-shaped steel support (5) comprises four cross-shaped support rods, and each support rod is provided with connecting ends at both ends, and the connecting ends are slidably connected to the enclosure structure (1).

3. According to the novel steel support structure with intelligent control of support position as described in claim 2, it is characterized in that: A guide rail (2) is longitudinally arranged on the inner wall of the enclosure structure (1); the number and position of the guide rail (2) match the number and position of the support rods; a plurality of groups of reserved holes are opened on both sides of the guide rail (2); and position fixing devices are arranged on both sides of the connection end, and the position fixing devices are engaged with the reserved holes of the guide rail (2).

4. According to the novel steel support structure with intelligent control of support position according to claim 3, it is characterized in that: The position fixing device is two limit balls (3) connected by a spring (21), the two limit balls (3) are correspondingly engaged with the reserved holes on both sides of the guide rail (2), and the diameter of the limit balls (3) is less than half of the inner diameter of a single support rod of the bidirectional cross steel support (5).

5. According to the novel steel support structure with intelligent control of support position as claimed in claim 1, it is characterized in that: The position adjustment device comprises a support frame (7) and a support position adjuster (6); the support frame (7) is supported on the top of the enclosure structure (1); the support frame (7) and the top bidirectional cross-shaped steel support (5) and the internal top bidirectional cross-shaped steel supports (5) are connected via the support position adjuster (6); a pressure sensor (18) is arranged on the support position adjuster (6); and the pressure sensor (18) is connected to a control system for monitoring the axial force of the support position adjuster (6).

6. According to the novel steel support structure with intelligent control of support position according to claim 5, it is characterized in that: The support position regulator (6) is further provided with a drive motor (13), a length adjustment device, and a screw seat (19); the drive motor (13) is connected to the screw seat (19) via the length adjustment device, and the control system adjusts the extension length of the screw seat (19) by controlling the length adjustment device through the opening and closing of the drive motor (13).

7. According to the novel steel support structure with intelligent control of support position as claimed in claim 6, it is characterized in that: The length adjustment device comprises a force transmission screw (16) and a screw nut (17); a drive motor (13) is connected to one end of the force transmission screw (16) via a coupling (14); the force transmission screw (16) is fixed in a support position adjuster (6) via a bearing seat (15); the other end of the force transmission screw (16) is connected to a screw seat (19) via a screw nut (17); and a pressure sensor (18) is arranged between the screw seat (19) and the screw nut (17).

8. According to the novel steel support structure with intelligent control of support position as claimed in claim 7, it is characterized in that: The control system comprises an axial force control panel (10), a displacement acquisition instrument (11) and control software (12); the displacement sensor (4) is connected to the displacement acquisition instrument (11) via a wire (9) for measuring the lateral displacement of the enclosure structure (1); the pressure sensor (18) is connected to the axial force control panel (10) via a wire (9) for obtaining the axial force of the position adjustment device; the axial force control panel (10) and the displacement acquisition instrument (11) are connected to the control software (12) via a wire (9); the control software (12) is used to obtain lateral displacement data of the enclosure structure (1) and axial force data of the position adjustment device; when the measured value of the lateral displacement data is greater than the design value, the axial force control panel (10) controls the position adjustment device to adjust the longitudinal position of one or more layers of bidirectional cross steel supports (5).

9. A foundation pit support method, characterized in that: The steel support structure with a novel intelligent control support position as described in any one of claims 1 to 8 is used for support, and the specific steps are as follows: Step 1: The displacement sensor (4) measures the lateral displacement data of the enclosure structure (1), and the control system obtains the lateral displacement data of each depth of the enclosure structure (1); Step 2: The control system compares the measured values ​​of the lateral displacement data of the enclosure structure (1) at each depth with the designed values, and adjusts the axial force of the position adjustment device according to the comparison result, thereby changing the support length of the position adjustment device to achieve the change of the longitudinal position of the bidirectional cross steel support 5.

10. A foundation pit supporting method according to claim 9, characterized in that: 1) When the measured value of the lateral displacement data of the retaining structure (1) at a certain depth is greater than the design value: The control system adjusts the axial force of the position adjustment device. When the length of the position adjustment device increases, the distance between the plurality of bidirectional cross supports (5) increases or the height of the bidirectional cross steel support (5) decreases; when the length of the position adjustment device decreases, the distance between the plurality of bidirectional cross supports (5) decreases or the height of the bidirectional cross steel support (5) increases; When the measured value of the lateral displacement data of the corresponding depth obtained by the control system is less than or equal to the design value, it means that the position adjustment of the bidirectional cross steel support (5) is appropriate, and the control system closes the position adjustment device; 2) When the measured value of the lateral displacement data of the retaining structure (1) at a certain depth position obtained by the control system is less than or equal to the design value, the control system and the position adjustment device will not operate.

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