Steel support servo supporting system capable of intelligently controlling axial force and deformation of inner support

Abstract

The invention provides a steel support servo supporting system capable of intelligently controlling inner support axial force and deformation, which comprises an enclosure structure, a plurality of layers of bidirectional #-shaped steel supports are fixed on the inner side of the enclosure structure at intervals, and steel support axial force servo devices are arranged in the bidirectional #-shaped steel supports. The steel support axial force servo device is used for adjusting the radial supporting force of the bidirectional #-shaped steel support; the plurality of displacement sensors are arranged on the outer wall of the enclosure structure and are used for measuring the lateral deformation of the enclosure structure; and the displacement sensor and the steel support axial force servo device are connected with a control system. Active adjustment of the axial force of the inner support is achieved, and the internal force and deformation of a supporting system are controlled in real time so as to meet the construction requirements of different construction stages.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a steel support servo support system for intelligently controlling the axial force and deformation of inner supports. Background Art

[0002] With the rapid development of modernization and the continuous advancement of urbanization, the urban population has grown rapidly. While the huge population has brought about rapid economic development, it has also brought huge challenges to the construction of urban infrastructure. Therefore, the comprehensive development and utilization of underground three-dimensional space has gradually become a breakthrough in urban infrastructure construction. However, the excavation of underground space in a crowded urban environment will inevitably affect nearby buildings. Therefore, the safety and effectiveness of the support structure during the foundation pit excavation process plays an important role in the safety of the foundation pit project.

[0003] With the continuous increase in the depth of foundation pit excavation and the gradual installation of horizontal internal supports, the stress and deformation of the foundation pit support system are constantly changing. However, after the construction is completed, the traditional foundation pit support system can only passively bear the surrounding soil pressure and cannot make any active adjustments. It has obvious limitations in dealing with real-time changes in soil pressure. In addition, when there is a difference between the stress of the support system and the design value, the system cannot be adjusted, which poses a safety hazard to the service of the support system.

[0004] As the foundation pit continues to get deeper and larger, the overall safety and stability of the foundation pit face huge challenges, and the safety of the support structure becomes increasingly important during the foundation pit excavation process. Therefore, during the construction process, the support structure during the foundation pit excavation process should be adjusted in real time to prevent the deformation of the foundation pit and the occurrence of foundation pit support accidents. Therefore, an internal support servo device that can realize active adjustment of the foundation pit support axial force needs to be studied and proposed. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a steel support servo support system that intelligently controls the internal support axial force and deformation, realizes active adjustment of the internal support axial force, and controls the internal force and deformation of the support system in real time to meet the construction requirements of different construction stages.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel support servo support system for intelligently controlling the axial force and deformation of the inner support, including a protective structure, multiple layers of bidirectional cross-shaped steel supports fixed at intervals on the inner side of the protective structure, and a steel support axial force servo device arranged inside the bidirectional cross-shaped steel support, the steel support axial force servo device being used to adjust the radial support force of the bidirectional cross-shaped steel support; a plurality of displacement sensors being arranged on the outer wall of the protective structure for measuring the lateral deformation of the protective structure; the displacement sensors and the steel support axial force servo device being connected to the control system.

[0007] Furthermore, the bidirectional cross-shaped steel support includes four cross-shaped support rods, each support rod is provided with connecting ends at both ends, and a steel support axial force servo device is provided in each connecting end.

[0008] Furthermore, guide rails are longitudinally installed on the inner wall of the enclosure structure, and the number and position of the guide rails match the number and position of the connection ends of the bidirectional cross-shaped steel supports, and the connection ends are horizontally embedded in the guide rails. Furthermore, the bidirectional cross-shaped steel support connection ends are fixed in the guide rails by bolts.

[0009] Furthermore, a pulley is provided at the top of the connecting end.

[0010] Furthermore, the steel support axial force servo device includes a drive motor, a position adjustment device, and a screw seat. The drive motor is electrically connected to the control system, the drive motor output shaft is connected to the position adjustment device, and the position adjustment device is connected to the screw seat for adjusting the position of the screw seat by driving the position adjustment device through the drive motor.

[0011] Furthermore, the position adjustment device includes a force transmission screw, which is fixed in the bidirectional cross-shaped steel support connection end through a bearing seat, the force transmission screw is connected to the output shaft of the driving motor through a coupling, and the force transmission screw is connected to the screw seat through a screw nut; a pressure sensor is arranged on the screw seat, and the pressure sensor is connected to the control system.

[0012] Furthermore, the control system includes a displacement collector, an axial force control panel and control software, the displacement sensor is connected to the displacement collector, and the displacement collector is connected to the control software; the steel support axial force servo device is connected to the axial force control panel, and the axial force control panel is connected to the control software.

[0013] The present invention also provides a foundation pit supporting method. When the above-mentioned steel support servo support system for intelligently controlling the axial force and deformation of the inner support is used for foundation pit supporting, the displacement sensor obtains the lateral deformation data of the enclosure structure in real time and transmits it to the control system. The control system compares the actual measured value of the lateral deformation data of the enclosure structure with the design value. When the actual measured value of the lateral deformation data is greater than the design value, the control system controls the steel support axial force servo device to start adjusting the radial support force of the bidirectional cross steel support at the position corresponding to the displacement sensor, until the control system obtains that the actual measured value of the lateral deformation data of the enclosure structure is less than the design value, and the steel support axial force servo device is closed.

[0014] Furthermore, when supporting the foundation pit, the displacement sensor obtains the lateral deformation data of the retaining structure in real time and transmits it to the control system. The control system compares the actual measured value of the lateral deformation data of the retaining structure with the design value. If the actual measured value of the lateral deformation data is less than or equal to the design value, the control system and the steel support axial force servo device will not operate.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention proposes a steel support servo support system that intelligently controls the internal support axial force and deformation. The bidirectional cross-shaped steel support design enhances the overall stability and bearing capacity of the support structure, and improves the rigidity and anti-deformation ability of the structure. By integrating displacement sensors, steel support axial force servo devices and control systems, real-time monitoring and intelligent control of the support axial force and deformation in the foundation pit support system are realized. The steel support axial force servo device can adjust the force of the support shaft in real time according to the instructions of the control system to meet the needs of different construction stages, thereby improving the adaptability and flexibility of the support system. The displacement sensor can accurately measure the lateral deformation of the enclosure structure and provide accurate data support for the decision-making of the control system.

[0016] Furthermore, the fixing method of the guide rails and bolts ensures the stability and accuracy of the bidirectional cross-shaped steel support during the support process, preventing the deviation and deformation of the support structure.

[0017] Furthermore, the steel support shaft force servo device integrates components such as a drive motor, a position adjustment device, a screw seat and a pressure sensor, has a compact structure, and is easy to install and maintain.

[0018] When the present invention performs foundation pit support, the displacement sensor can monitor the lateral deformation of the retaining structure in real time to ensure the safety of the support system during the construction process. The control system can actively adjust the steel support axial force servo device according to the data of the displacement sensor to realize the intelligent control of the support axial force in the support system. Through intelligent control, the deformation problem of the support system can be discovered and corrected in time, avoiding the safety hazards caused by excessive deformation and improving the construction efficiency. The support method can adapt to the needs of different construction stages, optimize the support effect by adjusting the internal support axial force, and ensure the stability and safety of the foundation pit support system. The control software realizes the intelligent optimization of the support system by reading and analyzing the internal support axial force and the lateral deformation data of the retaining structure, improves the scientificity and rationality of the support system, and provides strong technical support for the safe construction of foundation pit projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention; Figure 2 It is a cross-sectional view of an embodiment of the present invention; Figure 3 This is a cross-sectional view of the internal axial force servo device of the bidirectional cross steel support according to the embodiment of the present invention; In the attached figure: 1. Enclosure structure; 2. Guide rail; 3. Bolt; 4. Displacement sensor; 5. Bidirectional cross steel support; 6. Axial force control panel; 7. Displacement collector; 8. Control software; 9. Wire; 10. Drive motor; 11. Coupling; 12. Bearing seat; 13. Force transmission screw; 14. Screw nut; 15. Screw seat; 16. Pressure sensor; 17. Pulley. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1 , 2 As shown, the present invention provides a steel support servo support system for intelligently controlling the axial force and deformation of the inner support, including a protective structure 1, a guide rail 2, a bolt 3, a displacement sensor 4, a bidirectional cross-shaped steel support 5, an axial force control panel 6, a displacement collector 7, a control software 8, and a wire 9; a steel support axial force servo device is provided in the bidirectional cross-shaped steel support 5, and the steel support axial force servo device includes a driving motor 10, a coupling 11, a bearing seat 12, a force transmission screw 13, a screw nut 14, a screw seat 15, a pressure sensor 16 and a pulley 17.

[0022] Among them, the retaining structure 1 is used to support the surrounding soil after the foundation pit is excavated; the guide rail 2 is longitudinally installed on the inner wall of the retaining structure 1, and 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 supports 5; the multi-layer two-way cross-shaped steel supports 5 are fixed at intervals on the inner side of the retaining structure 1, and the two-way cross-shaped steel supports 5 include four cross-shaped support rods, and connecting ends are set at both ends of each support rod, and the connecting ends are horizontally embedded and installed in the guide rail 2; the bolts 3 pass through the bolt holes reserved on the guide rail 2 to fix the connecting ends of the two-way cross-shaped steel supports 5 in the guide rail 2, and provide vertical support for the two-way cross-shaped steel supports 5; a steel support is set inside the connecting end of the two-way cross-shaped steel support 5 A support axial force servo device, the steel support axial force servo device is used to adjust the radial support force of the bidirectional cross-shaped steel support 5; a plurality of displacement sensors 4 are arranged on the outer wall of the enclosure structure 1, and are used to measure the lateral deformation of the enclosure structure 1; the plurality of displacement sensors 4 are connected to the displacement acquisition instrument 7 through the wire 9, and the displacement acquisition instrument 7 is used to collect the lateral deformation data of the enclosure structure 1 measured by the displacement sensor 4; the displacement acquisition instrument 7 is connected to the control software 8; the plurality of steel support axial force servo devices are connected to the axial force control panel 6 through the wire 9, and are used to increase the radial support force of the bidirectional cross-shaped steel support 5 by adjusting the axial force of the steel support axial force servo device; the axial force control panel 6 is connected to the control software 8; Preferably, the excavation section of the foundation pit is generally a quadrilateral, and all four excavation surfaces in both directions need support. The bidirectional cross-shaped support 5 can not only realize the synchronous support of the bidirectional excavation surface under the premise of ensuring the integrity of the support structure, but also reduce the workload of the internal support construction and installation.

[0023] Preferably, a pulley 17 is provided at one end of the bidirectional cross-shaped steel support 5 connected to the retaining structure 1. The use of the pulley 17 can reduce the tangential friction between the bidirectional cross-shaped steel support 5 and the retaining structure 1, and the contact between the bidirectional cross-shaped steel support 5 and the retaining structure 1 is more flexible. The adjustment of the support length can be more effectively fed back to the retaining structure, thereby changing the deformation of the retaining structure.

[0024] Preferably, Figure 3 As shown, the steel support axial force servo device includes a driving motor 10, a coupling 11, a bearing seat 12, a force transmission screw 13, a screw nut 14, and a screw seat 15. The control software 8 controls the axial force control panel 6 to start, and the axial force control panel 6 starts the driving motor 10. The driving motor 10 provides torque for the force transmission screw 13 by rotating itself and combining with the coupling 11; the coupling 11 is used to connect the driving motor 10 and the force transmission screw 13; the bearing seat 12 is used to connect the fixed force transmission screw 13 to the inside of the connecting end of the bidirectional cross steel support 5; the force transmission screw 13 is connected to the screw seat 15 through the screw nut 14, and the driving motor 10 drives the force transmission screw 13 to rotate, and the force transmission screw 13 provides an axial thrust to the screw seat 15 through its own rotation. Under the action of this axial thrust, the screw seat 15 will move along the axial direction of the force transmission screw 13, and the lateral support force of the steel support axial force servo device on the enclosure structure 1 is increased by changing the movement of the screw seat 15; a pressure sensor 16 is set on the screw seat 15 to measure the size of the support axial force, and the pressure sensor 16 is connected to the axial force control panel 6 through a wire. The axial force control panel 6 is used to monitor and adjust the support axial force of the steel support axial force servo device inside the connection end of the two-way well steel support 5; The displacement sensor 4 obtains the lateral deformation data of the enclosure structure 1 and transmits it to the displacement acquisition instrument 7. The displacement acquisition instrument 7 transmits the lateral deformation data of the enclosure structure 1 to the control software 8. The control software 8 compares the measured value of the lateral deformation data of the enclosure structure 1 with the design value. If the measured value of the lateral deformation data is greater than the design value, the drive motor 10 is started through the axial force control panel 6. The drive motor 10 rotates and applies torque to the force transmission screw 13 in conjunction with the coupling 11. Since the position of the screw nut 14 is fixed, the rotation of the force transmission screw 13 will increase its length on the other side of the screw nut 14, causing the screw seat 15 to extend radially outward, thereby increasing the support length and reducing the lateral deformation of the enclosure structure 1, until the measured value of the lateral deformation data is less than or equal to the design value. If the measured value of the lateral deformation data is less than the designed value, the axial force control panel 6 and the drive motor 10 will not act; When the steel support servo support system for intelligently controlling the internal support axial force and deformation of the present invention is used for foundation pit support, the specific steps are as follows: Step 1: according to the size of the foundation pit, the size, quantity and inter-layer spacing of the retaining structure 1 and the bidirectional cross steel support 5 are set; the retaining structure 1 is set in the foundation pit and multiple layers of bidirectional cross steel support 5 are fixed in parallel and spaced therein; multiple displacement sensors 4 are installed on the outside of the retaining structure 1; the displacement sensors 4 are connected to the displacement collector 7 through the wire 9; the steel support axial force servo device in the bidirectional cross steel support 5 is connected to the axial force control panel 6 through the wire 9; the displacement collector 7 and the axial force control panel 6 are connected to the control software 8; Step 2: The displacement sensor 4 acquires the lateral deformation data of the enclosure structure 1 in real time and transmits it to the control software 8 through the displacement acquisition device 7. The control software 8 compares the measured value of the lateral deformation data of the enclosure structure 1 with the design value. When the measured value of the lateral deformation data is greater than the design value, the control software 8 controls the steel support axial force servo device to start adjusting and increase the radial support force of the bidirectional cross steel support 5 at the position corresponding to the displacement sensor 4, until the control software 8 obtains that the measured value of the lateral deformation data of the enclosure structure 1 is less than the design value, and the steel support axial force servo device is turned off.

[0025] Step three, the displacement sensor 4 acquires the lateral deformation data of the enclosure structure 1 in real time and transmits it to the control software 8 through the displacement acquisition device 7. The control software 8 compares the measured value of the lateral deformation data of the enclosure structure 1 with the design value. If the measured value of the lateral deformation data is less than or equal to the design value, the control software 8 and the steel support axial force servo device will not take any action.

[0026] The steel support servo support system proposed in the present invention is based on the real-time monitoring of the internal support axial force and the lateral deformation of the enclosure structure, thereby realizing the active control of the support axial force and deformation of the foundation pit support system, and improving the effectiveness and safety of the foundation pit support system. Further, the bidirectional cross steel support 5 is embedded and installed in the guide rail 2, and the bolt 3 is inserted into the reserved bolt hole of the guide rail 2 at the bottom of the bidirectional cross steel support 5 to provide vertical support for the bidirectional cross steel support 5, so as to achieve the fixation and constraint of the bidirectional cross steel support 5. Further, the steel support axial force servo device is installed inside the bidirectional cross steel support 5, which not only ensures the integrity of the support structure, but also can be combined with the drive motor 10, the force transmission screw 13, the screw seat 15 and the pressure sensor 16 to realize the intelligent monitoring and adjustment of the internal support axial force. The present invention simultaneously reads the internal support axial force and the lateral deformation data of the enclosure structure through the control software 8, and realizes the intelligent control of the internal support axial force through the axial force control panel by comparing the measured deformation value with the design value, and further realizes the intelligent optimization of the deformation of the enclosure structure.

[0027] In summary, the present invention obtains the lateral deformation data of the enclosure structure 1 through the displacement sensor 4, and transmits it to the control software 8 through simple data transmission. Through simple data processing, the purpose of controlling the opening and closing of the drive motor 10 is achieved, and the simple mechanical structure composed of the force transmission screw 13, the screw nut 14, and the screw seat 15 of the drive motor 10 is used to realize the intelligent control of the internal support axial force. The present invention combines the internal support axial force servo device with the internal support axial force and deformation optimization system to realize the monitoring and intelligent control of the support axial force and deformation of the support system, so that the proposed new support system can intelligently monitor and control the force and deformation of the entire process of foundation pit excavation, and can implement complex support schemes to solve difficult foundation pit support problems.

Claims

1. A steel support servo support system for intelligently controlling the internal support axial force and deformation, characterized in that: The invention comprises a protective structure (1), a plurality of bidirectional cross-shaped steel supports (5) fixed at intervals on the inner side of the protective structure (1), a steel support axial force servo device arranged inside the bidirectional cross-shaped steel supports (5), and the steel support axial force servo device is used to adjust the radial support force of the bidirectional cross-shaped steel supports (5); a plurality of displacement sensors (4) are arranged on the outer wall of the protective structure (1) for measuring the lateral deformation of the protective structure (1); and the displacement sensors (4) and the steel support axial force servo device are connected to a control system.

2. The steel support servo support system for intelligently controlling the internal support axial force and deformation according to claim 1 is characterized in that: The bidirectional cross-shaped steel support (5) comprises four cross-shaped support rods, each support rod is provided with connecting ends at both ends, and each connecting end is provided with a steel support axial force servo device.

3. The steel support servo support system for intelligently controlling the internal support axial force and deformation according to claim 2 is characterized in that: A guide rail (2) is longitudinally mounted on the inner wall of the enclosure structure (1); the number and position of the guide rails (2) match the number and position of the connection ends of the bidirectional cross steel supports (5); the connection ends are horizontally embedded in the guide rails (2).

4. The steel support servo support system for intelligently controlling the internal support axial force and deformation according to claim 3 is characterized in that: The connection end of the bidirectional cross steel support (5) is fixed in the guide rail (2) by means of bolts (3).

5. The steel support servo support system for intelligently controlling the axial force and deformation of the inner support according to claim 2 is characterized in that: A pulley (17) is provided at the top of the connection end.

6. The steel support servo support system for intelligently controlling the internal support axial force and deformation according to claim 1 is characterized in that: The steel support shaft force servo device comprises a drive motor (10), a position adjustment device, and a screw seat (15); the drive motor (10) is electrically connected to a control system; an output shaft of the drive motor (10) is connected to the position adjustment device; and the position adjustment device is connected to the screw seat (15) for adjusting the position of the screw seat (15) by driving the position adjustment device through the drive motor (10).

7. The steel support servo support system for intelligently controlling the inner support axial force and deformation according to claim 6 is characterized in that: The position adjustment device comprises a force transmission screw (13), the force transmission screw (13) being fixed in the connection end of the bidirectional cross steel support (5) through a bearing seat (12), the force transmission screw (13) being connected to the output shaft of the drive motor (10) through a coupling (11), and the force transmission screw (13) being connected to a screw seat (15) through a screw nut (14); a pressure sensor (16) being arranged on the screw seat (15), and the pressure sensor (16) being connected to a control system.

8. The steel support servo support system for intelligently controlling the internal support axial force and deformation according to claim 1 is characterized in that: The control system comprises a displacement acquisition instrument (7), an axial force control panel (6) and control software (8); the displacement sensor (4) is connected to the displacement acquisition instrument (7), and the displacement acquisition instrument (7) is connected to the control software (8); the steel support axial force servo device is connected to the axial force control panel (6), and the axial force control panel (6) is connected to the control software (8).

9. A foundation pit support method, characterized in that: When a steel support servo support system for intelligently controlling the axial force and deformation of the inner support as described in any one of claims 1 to 8 is used for foundation pit support, the displacement sensor (4) obtains the lateral deformation data of the retaining structure (1) in real time and transmits it to the control system. The control system compares the measured value of the lateral deformation data of the retaining structure (1) with the design value. When the measured value of the lateral deformation data is greater than the design value, the control system controls the steel support axial force servo device to start adjusting the radial support force of the bidirectional cross steel support (5) at the position where the corresponding displacement sensor (4) is located, until the control system obtains that the measured value of the lateral deformation data of the retaining structure (1) is less than the design value, and the steel support axial force servo device is closed.

10. A foundation pit supporting method according to claim 9, characterized in that: When supporting the foundation pit, the displacement sensor (4) acquires the lateral deformation data of the retaining structure (1) in real time and transmits it to the control system. The control system compares the measured value of the lateral deformation data of the retaining structure (1) with the design value. If the measured value of the lateral deformation data is less than or equal to the design value, the control system and the steel support axial force servo device will not operate.

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