Movable steel structure supporting system and construction collaboration method

Abstract

The invention relates to the technical field of foundation pit construction protection, in particular to a movable steel structure supporting system and a construction cooperation method. The supporting system comprises a plurality of supporting devices, a video monitoring device and an upper computer, the multiple supporting devices are supported on a surrounding purlin of a foundation pit in a grouped mode, the supporting devices in the same group are arranged in the vertical direction, and each supporting device comprises a supporting beam, supporting feet, an electric jack, a lifting device, a controller, a power supply device and a communication device. The supporting feet are located at the two ends of the supporting beam respectively and slidably connected with the supporting beam, the supporting feet are supported on the enclosing purlin, the two electric jacks are installed in the supporting beam and drive the two supporting feet to stretch out and draw back relative to the supporting beam respectively, the lifting device is installed in the middle of the supporting beam, and the controller, the power supply device and the communication device are installed in the supporting beam. The electric jack, the lifting device and the communication device are connected with the control device, the power supply device supplies power to other devices, the video monitoring device obtains video monitoring in the foundation pit, and the upper computer is connected with the communication device and the video monitoring device of the supporting device.

Description

Technical Field

[0001] This application relates to the field of foundation pit construction protection technology, specifically to a mobile steel structure support system and a construction collaboration method. Background Technology

[0002] In some deep foundation pits, such as those containing foundation caps or elevator shafts, where the pit structure is thick and the soil conditions are poor, secondary support is required to ensure the safety of excavation and foundation work. When the support uses a combination of piles and bracing, to avoid horizontal construction joints caused by pouring the foundation structure all at once, the bracing needs to be cast into the foundation structure, forming a special embedded bracing support structure. Improper surface treatment of the embedded bracing and weak bonding with the cast-in-place structure often lead to water leakage and corrosion of the internal reinforcing steel. Furthermore, embedded bracing can affect the binding of reinforcing steel and concrete pouring. Fixed embedded bracing is also inconvenient for controlling foundation pit deformation; too close spacing can lead to waste, while too large spacing can cause excessive deformation, damaging surrounding high-level engineering piles, buildings, or municipal roads (pipelines). Therefore, there is an urgent need to research new adjustable embedded bracing foundation pit support technology. Summary of the Invention

[0003] This specification describes a mobile steel structure support system and a construction collaboration method through several embodiments.

[0004] In one aspect, embodiments of this specification provide a mobile steel structure support system, including multiple support devices, a video monitoring device, and a host computer. Multiple support devices are grouped and supported on the walers of the foundation pit, with each group arranged vertically. Each support device includes a support beam, legs, electric jacks, a lifting device, a controller, a power supply device, and a communication device. The legs are located at both ends of the support beam and are slidably connected to it. The legs support the walers. Two electric jacks are installed inside the support beam, each driving the two legs to extend and retract relative to the support beam. The lifting device is installed in the middle of the support beam. The controller, power supply device, and communication device are installed inside the support beam. The electric jacks, lifting device, and communication device are connected to the controller. The power supply device supplies power to the other devices. The video monitoring device acquires video monitoring data within the foundation pit. The host computer connects to the communication device and the video monitoring device of the support devices.

[0005] Secondly, the embodiments of this specification provide a construction collaboration method using the aforementioned mobile steel structure support system, including the following steps:

[0006] Excavate the foundation pit to the first predetermined depth, install the waler, and install several sets of support devices according to the preset horizontal spacing. Each set of support devices is arranged vertically, and the electric jacks of the support devices extend to support the legs on the waler.

[0007] Continue excavating the foundation pit without stopping work and install walers at the predetermined time. As the depth increases, gradually increase the spacing of the support devices in the same group until the maximum spacing is reached or the foundation pit reaches the target depth.

[0008] The beneficial effects of the technical solutions provided in some embodiments of this specification include at least the following:

[0009] In several embodiments of this specification, a mobile steel structure support system and construction coordination method are provided. By setting multiple sets of vertically adjustable support devices on the foundation pit waler and combining them with the coordinated control of electric jacks and lifting devices, the support structure achieves dynamic adaptive adjustment in the depth direction of the foundation pit. It can automatically increase the spacing between supports in the same group as the excavation depth increases without stopping construction, or gradually decrease the spacing during backfilling, effectively matching the construction rhythm and improving construction continuity. The support devices can be easily installed and dismantled without needing to be poured into the foundation structure, thus not affecting the backfilling construction of the foundation pit. It supports dynamic adjustment of the local support height according to the position of construction equipment to achieve collision avoidance. During large machinery operations, it automatically raises adjacent supports to avoid collisions, and resets them after the work is completed, increasing the available construction space within the foundation pit and improving construction efficiency.

[0010] Other features and advantages of various embodiments of this specification will be further revealed in the following detailed description and accompanying drawings. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this specification, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the movable steel structure support system provided in this manual.

[0013] Figure 2 This is a schematic diagram of the support device provided in this manual.

[0014] Figure 3 This is a schematic diagram of the end of the support device provided in this specification.

[0015] Figure 4 This is a schematic diagram of the lifting device provided in this manual.

[0016] Figure 5 This is a schematic diagram of the connector provided in this manual.

[0017] Figure 6 This is a schematic diagram illustrating the coordination of foundation pit excavation depth provided in this manual.

[0018] Figure 7 This is another schematic diagram illustrating the coordination of foundation pit excavation depth provided in this specification.

[0019] Figure 8 This is a schematic diagram of the method for controlling the change of spacing provided in this specification.

[0020] Figure 9 This is a construction coordination diagram provided in this manual.

[0021] Figure 10 This is yet another construction coordination diagram provided in this manual.

[0022] Among them: 11. Excavation pit, 12. Waler, 13. Soil layer to be excavated, 20. Support device, 21. Support leg, 22. Electric jack, 23. Cylinder, 24. Support beam, 25. Connecting hole, 26. Connector, 27. Mounting base, 28. Motor, 261. Movable pin, 262. Connecting ring, 263. Rotating pin. Detailed Implementation

[0023] The technical solutions of the embodiments of this specification will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of this specification and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this specification.

[0024] The terms "first," "second," "third," etc., in the description, claims, and accompanying drawings are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0025] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification.

[0026] All data involved in this application are information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0027] Before introducing the technical solutions described in this manual, the application scenarios and related technologies of the technical solutions will be introduced.

[0028] Deep foundation pit 11 projects are widely used in urban construction fields such as basements of high-rise buildings, underground rail transit, underground commercial complexes, and municipal infrastructure. As urban land resources become increasingly scarce and building space continues to extend underground, the excavation depth and scale of deep foundation pit 11 projects continue to increase, typically exceeding 10 meters in depth, with some projects even reaching over 30 meters, forming a typical "deep and large foundation pit 11" scenario.

[0029] In the construction of deep foundation pits, diaphragm walls or bored piles are typically used as retaining structures, with multi-layered internal support systems installed at different depths to resist external earth and water pressures and prevent instability or excessive deformation of the retaining structure that could lead to settlement in the surrounding area. Traditionally, a layer of fixed steel or concrete support is installed after each layer of excavation reaches a certain depth, and then removed layer by layer after the main structure has been constructed and has achieved sufficient strength. This process is not only time-consuming and material-intensive, but the support structure also occupies a significant portion of the foundation pit's internal space, severely restricting the operational efficiency of large excavators, concrete pump trucks, and other equipment, thus impacting the construction progress. Deep foundation pit construction is highly sequential and dynamic; the excavation sequence, support timing, dewatering measures, and changes in external loads can all affect structural safety. Especially in multi-stage, overlapping work environments, achieving efficient coordination between the support system and earthwork excavation, structural construction, and equipment operation becomes a key challenge in ensuring project quality and construction safety. Therefore, a support system that can adapt to the complex construction environment of deep foundation pits, possesses dynamic adjustment capabilities, and supports intelligent monitoring and collaborative operations is urgently needed.

[0030] This specification provides a movable steel structure support system. Several sets of support devices 20 are distributed at preset horizontal intervals between the walers 12. The support devices 20 within the same set are aligned vertically to provide multi-point support for the walers 12. Each set of support devices 20 can move vertically, automatically adjusting the spacing between adjacent support devices 20 according to the construction progress during the excavation or backfilling of the foundation pit 11, thereby achieving dynamic adjustment of the support position. For details, please refer to the appendix. Figure 1 The mobile steel structure support system includes multiple support devices 20, a video monitoring device, and a host computer. The multiple support devices 20 are grouped together and supported on the walers 12 of the foundation pit 11. The support devices 20 in the same group are arranged vertically. Please refer to the appendix. Figure 2 and appendix Figure 3The support device 20 includes a support beam 24, support legs 21, electric jacks 22, a lifting device, a controller, a power supply device, and a communication device. The support legs 21 are located at both ends of the support beam 24 and are slidably connected to it. The support legs 21 are supported on the waler 12. Two electric jacks 22 are installed inside the support beam 24, driving the two support legs 21 to extend and retract relative to the support beam 24. The lifting device is installed in the middle of the support beam 24. The controller, power supply device, and communication device are installed inside the support beam 24. The electric jacks 22, lifting device, and communication device are connected to the controller. The power supply device supplies power to the other devices. The video monitoring device acquires video monitoring of the pit 11. The host computer connects to the communication device and video monitoring device of the support device 20. The waler 12 is provided with a boss that mates with the support legs 21, and the boss extends vertically to cover the area of ​​the pit 11.

[0031] The horizontal grouping and vertical column layout ensures the density of the support within the plane of the foundation pit 11. As the foundation pit 11 is excavated or backfilled layer by layer, the support devices 20 in the same group can automatically adjust the vertical spacing between each other, realizing flexible movement of the support position and avoiding the problem of repeated disassembly and assembly required by traditional supports.

[0032] The support beam 24, serving as the main load-bearing structure of the entire support device 20, is preferably made of high-strength steel, possessing sufficient bending and compressive resistance. It connects the two side legs 21 and transmits the internal support force. The legs 21 are located at both ends of the support beam 24 and are slidably connected to it via slide rails or guide grooves, allowing them to extend and retract along the length of the support beam 24. The bottom of the legs 21 engages with the bosses on the waler 12. An electric jack 22 is built into the support beam 24, its piston rod connected to the corresponding leg 21. It drives the legs 21 to slide along the support beam 24 via electrical control, extending or retracting the legs 21. When the legs 21 extend and press firmly against the bosses on the waler 12, the support device 20 provides rigid support to the waler 12. When adjustment is needed, the jack can control the legs 21 to retract, releasing the support. The controller, power supply, and communication devices are all integrated and installed inside the support beam 24.

[0033] Video monitoring devices are distributed at key locations around the foundation pit 11, capturing real-time construction footage within the pit and transmitting the video stream to a host computer. The host computer analyzes the data using image recognition algorithms to determine the construction status of the foundation pit 11. It also obtains the alignment status of the connector 26 and connection hole 25 of the support device 20, assisting in determining whether the lifting action is in place and improving the accuracy and safety of automated operations.

[0034] Please see the appendix Figure 4The lifting device includes a mounting base 27, which is rotatably mounted on the support beam 24, a cylinder 23 mounted on the mounting base 27, a connector 26 located at the output end of the cylinder 23, and a motor 28 that drives the rotating base. The support beam 24 is provided with a connecting hole 25 that connects to the connector 26 of the lifting device of the adjacent support device 20. The cylinder 23, the motor 28, and the connector 26 are connected to the controller.

[0035] The mounting base 27 is rotatably mounted on the support beam 24 via a rotating shaft or bearing, forming a tilting and swinging structure. This allows the lifting device to have a certain spatial orientation adjustment capability. It is recommended that the motor 28 be a servo motor 28 or a stepper motor 28. The motor 28 is fixed to the support beam 24 or the mounting base 27, and its output shaft is connected to the mounting base 27, driving the mounting base 27 to rotate around the rotating shaft, thereby adjusting the direction of the cylinder 23. When a lifting operation is required, the controller first calculates the optimal docking angle based on the target position and starts the motor 28 to drive the mounting base 27 to rotate to the predetermined posture, aligning the connector 26 with the connection hole 25 of the adjacent support device 20 above or below. Subsequently, the cylinder 23 extends, pushing the connector 26 into the corresponding connection hole 25. The support beam 24 is provided with one or more connection holes 25 that match the adjacent support device 20. After the connector 26 is successfully inserted and locked, the cylinder 23 continues to extend and retract, thereby driving the entire support device 20 to rise or fall, achieving position transfer.

[0036] Please see the appendix Figure 5 The connector 26 includes a connecting ring 262, two movable pins 261 movably mounted on the connecting ring 262, the two movable pins 261 being able to slide radially along the connecting ring 262, a rotating pin 263 mounted between the two movable pins 261, the rotating pin 263 being driven by a geared motor 28, the two movable pins 261 being connected by a spring, and the geared motor 28 being connected to a controller.

[0037] The connecting ring 262 is a ring-shaped metal part with a through hole in the center to facilitate the insertion of a positioning pin or guide rod for alignment. Two movable pins 261 are symmetrically arranged on both sides of the connecting ring 262. These two movable pins 261 are slidably installed radially along the connecting ring 262 and can extend or retract from the side of the connecting ring 262 under external force. When the connector 26 is inserted into the connecting hole 25 of the adjacent support device 20, the two movable pins 261 are in a retracted state. Once fully inserted into the connecting hole 25, the controller starts the reduction motor 28, driving the rotating pin 263 to rotate. The rotating pin 263 is an eccentric wheel or cam structure, installed between the two movable pins 261, with one end connected to the output shaft of the reduction motor 28. When the reduction motor 28 is working, the rotating pin 263 rotates, and its non-circular contour gradually presses against the two movable pins 261, overcoming the spring force and causing them to pop out radially until they are engaged in the locking groove on the side wall of the connecting hole 25, thus achieving a mechanical connection.

[0038] On the other hand, this specification provides a construction collaboration method using the aforementioned mobile steel structure support system, including the following steps:

[0039] Excavate the foundation pit 11 to the first predetermined depth, install the waler 12, and install several sets of support devices 20 according to the preset horizontal spacing. Each set of support devices 20 is arranged vertically, and the electric jacks 22 of the support devices 20 extend to support the legs 21 on the waler 12.

[0040] Continue excavating the soil layer 13 to be excavated in the foundation pit 11 without stopping work and install the walers 12 at the predetermined time. As the depth increases, gradually increase the spacing of the support devices 20 in the same group until the maximum spacing is reached or the foundation pit 11 is excavated to the target depth.

[0041] After excavating the foundation pit 11 to a first predetermined depth, such as 3-5 meters underground, first-layer walers 12 are installed on the retaining structures on both sides of the foundation pit 11, such as diaphragm walls, with pre-set vertically extending boss structures on the walers 12. Subsequently, according to the pre-set lateral spacing required by the design, for example, one set every 6-8 meters, several sets of support devices 20 are hoisted and positioned in their corresponding locations. Please refer to the appendix. Figure 6 Each set of support devices 20 consists of multiple units arranged vertically. Initially, the support devices 20 are closely distributed, maintaining the minimum designed spacing. After installation, the electric jacks 22 inside each support device 20 are activated, driving the legs 21 at both ends to extend outward along the support beam 24 to achieve support. As the depth of the foundation pit 11 increases, the vertical spacing of the support devices 20 gradually increases.

[0042] Unlike existing construction methods, this method continues excavation downwards without stopping after the initial support is completed. As the depth of the foundation pit 11 gradually increases, the system determines whether a new waler layer 12 needs to be added based on the preset construction plan and real-time monitoring data, and simultaneously activates the support spacing adjustment mechanism.

[0043] Specifically, please refer to the appendix. Figure 7 When excavation reaches the installation elevation of the next waler 12, construction workers install the new waler 12 and protruding structure at that depth. Simultaneously, the control system initiates the automatic lifting and lowering program of the support devices 20 within the same group. Multiple support devices 20 within the same group move sequentially or synchronously, gradually increasing the vertical spacing between them. For example, the initial spacing is 2 meters, which can be gradually increased to 4-6 meters, thus providing support for the entire excavation pit 11. This process can be repeated, adjusting the support layout with each layer of excavation until the maximum allowable spacing of the support system is reached, or the excavation pit 11 has been excavated to the target depth, such as 25 meters underground. During this process, there is no need to dismantle the support devices 20, improving construction efficiency and reducing manual intervention and safety risks.

[0044] On the other hand, this specification provides a method for controlling the spacing variation of the support devices 20 in the same group; please refer to the appendix. Figure 8 ,include:

[0045] Step S1) Control the motor 28 to rotate to drive the cylinder 23 to swing, and control the cylinder 23 to extend until the connector 26 is aligned with the connection hole 25 of the support device 20 located above. The alignment is determined by analyzing the video monitoring.

[0046] Step S2) Control the rotating pin 263 to rotate, push out the movable pin 261 and lock it into the connecting hole 25;

[0047] Step S3) Control the two electric jacks 22 to shorten the preset length, control the cylinder 23 to extend to lower the support device 20, and control the cylinder 23 to shorten to raise the support device 20.

[0048] Step S4) After lowering or raising the target height, control the two electric jacks 22 to extend by a preset length, and then control the rotating pin 263 to reset so that the movable pin 261 exits from the connecting hole 25.

[0049] Step S5) Control the motor 28 to rotate to drive the cylinder 23 to swing, and control the cylinder 23 to shorten, so that the lifting device is reset.

[0050] The controller first starts motor 28, driving mounting base 27 to rotate, which in turn adjusts the orientation of cylinder 23 and its end connector 26, aligning their axes with the connection hole 25 of the support device 20 above. Cylinder 23 slowly extends, pushing connector 26 closer to connection hole 25. The host computer uses a video monitoring device to capture real-time images of the connection area and analyzes the relative positional deviation between connector 26 and connection hole 25 using a built-in image recognition algorithm. After alignment, the controller starts the geared motor 28 inside connector 26, driving rotating pin 263 to rotate. The eccentric structure of rotating pin 263 gradually presses against two spring-connected movable pins 261, causing them to slide radially outward along connecting ring 262 until they are engaged in connection hole 25.

[0051] After locking is complete, the controller instructs the two electric jacks 22 to simultaneously shorten by a preset length, for example, 50-100mm, so that the support leg 21 disengages from the current waler 12 boss and releases the original support state. Subsequently, the control cylinder 23 continues to extend, pushing the entire support device 20 downward. If it needs to rise, the cylinder 23 shortens to achieve the upward movement.

[0052] Once the support device 20 reaches the target height, the controller drives the two electric jacks 22 to extend their preset lengths again, allowing the support legs 21 to firmly support the waler 12 protrusion at the new elevation, restoring its load-bearing capacity. After the support force stabilizes, the controller reverses the drive of the reduction motor 28, causing the rotating pin 263 to return to its original position. The movable pin 261 automatically retracts under the spring tension, disengaging from the connecting hole 25. The controller then controls the motor 28 to rotate in the opposite direction, resetting the mounting base 27 to its initial horizontal position. Simultaneously, the cylinder 23 retracts to its initial stroke, restoring the lifting device to its original state.

[0053] On the other hand, the construction coordination method also includes the following steps:

[0054] When construction equipment is working in the foundation pit 11, the support device 20 is raised to a height that is controlled within a preset distance from the construction equipment until the height exceeds the top of the construction equipment.

[0055] When the distance to the construction equipment exceeds a preset distance value, the already raised support device 20 is controlled to descend to the height before coordination.

[0056] To improve the working space for large construction equipment such as excavators and concrete pump trucks inside the foundation pit 11, this manual provides an avoidance mechanism to achieve dynamic spatial coordination between the support device 20 and the construction equipment.

[0057] When construction equipment is detected operating within the foundation pit 11, any support devices 20 within a preset distance (e.g., 10 meters) are marked as needing to be avoided. These needing-avoidance support devices 20 are then controlled to rise. They are raised to a height exceeding the top of the construction equipment by a certain safety margin, such as 0.5 meters or more, thus creating an unobstructed passage space. Please refer to the appendix. Figure 9 and attached Figure 10 During continuous operation of the construction equipment, its movement trajectory is tracked in real time, and the range of support devices 20 that need to be avoided is dynamically updated. When the construction equipment moves out of the preset influence area, that is, when the distance to it exceeds the preset distance value, the system automatically controls the raised support device 20 to perform a lowering and reset operation, restoring the support state. This avoids the problems of frequent work stoppages and dismantling caused by support obstruction in traditional construction, and greatly improves the operating efficiency and safety of heavy equipment.

[0058] On the other hand, when the foundation pit 11 is backfilled, the spacing of the support devices 20 in the same group is gradually reduced until the minimum spacing is reached or the foundation pit 11 is backfilled to the first predetermined depth.

[0059] Continue backfilling the foundation pit 11, control all the support devices 20 to support the legs 21 on the waler 12, and remove the support devices 20 from top to bottom in sequence, controlling the legs 21 to detach from the waler 12 during removal.

[0060] As the earth is backfilled from bottom to top, the lateral pressure on the retaining structure gradually decreases, and the spacing of the supporting devices 20 in the same group begins to adjust in the opposite direction. The vertical spacing of each supporting device 20 is gradually reduced to restore the initial dense arrangement until the minimum distance allowed by the structure is reached, or the backfill is completed to the first predetermined depth.

[0061] At this point, the electric jack 22 controlling the uppermost support device 20 retracts, causing the support leg 21 to detach from the waler 12 protrusion. After the support leg 21 detaches, hoisting equipment is used to remove the entire support device 20 from the foundation pit 11. Following a top-to-bottom sequence, the above dismantling process is repeated, dismantling all support devices 20 layer by layer. The dismantling process avoids the high-risk operation modes of traditional "overall blasting demolition" or "high-altitude cutting," achieving safe, controllable, and non-destructive dismantling of the support system, while allowing the support device 20 to be reused.

[0062] The embodiments described above are merely preferred embodiments of this specification and are not intended to limit the scope of this specification. Any modifications and improvements made by those skilled in the art to the technical solutions of this specification without departing from the spirit of this specification should fall within the protection scope defined by the claims of this specification.

Claims

1. A mobile steel structure support system, characterized in that, It includes multiple support devices, video monitoring devices, and a host computer. The multiple support devices are grouped together and supported on the walers of the foundation pit, with the support devices in the same group arranged vertically. The support device includes a support beam, support legs, electric jacks, a lifting device, a controller, a power supply device, and a communication device. The support legs are located at both ends of the support beam and are slidably connected to it. The support legs support the waler. Two electric jacks are installed inside the support beam, each driving one of the support legs to extend or retract relative to the beam. The lifting device is installed in the middle of the support beam. The controller, power supply device, and communication device are installed inside the support beam. The electric jacks, lifting device, and communication device are connected to the controller. The power supply device supplies power to the other components. The video surveillance device acquires video surveillance footage of the area inside the foundation pit. The host computer connects to the communication device and video monitoring device of the support device.

2. The mobile steel structure support system according to claim 1, characterized in that, The waler is provided with a boss that cooperates with the support leg, and the boss extends vertically to cover the area of ​​the foundation pit.

3. A mobile steel structure support system according to claim 1 or 2, characterized in that, The lifting device includes a mounting base rotatably mounted on the support beam, a cylinder mounted on the mounting base, a connector located at the output end of the cylinder, and a motor driving the rotating base. The support beam is provided with a connection hole for connecting to the connector of the lifting device of an adjacent support device. The cylinder, motor, and connector are connected to the controller.

4. A mobile steel structure support system according to claim 3, characterized in that, The connector includes a connecting ring, two movable pins movably mounted on the connecting ring, the two movable pins being able to slide radially along the connecting ring, a rotating pin mounted between the two movable pins, the rotating pin being driven by a geared motor, the two movable pins being connected by a spring, and the geared motor being connected to a controller.

5. A construction coordination method, using the mobile steel structure support system as described in claim 4, characterized in that, Includes the following steps: Excavate the foundation pit to the first predetermined depth, install the waler, and install several sets of support devices according to the preset horizontal spacing. Each set of support devices is arranged vertically, and the electric jacks of the support devices extend to support the legs on the waler. Continue excavating the foundation pit without stopping work and install walers at the predetermined time. As the depth increases, gradually increase the spacing of the support devices in the same group until the maximum spacing is reached or the foundation pit reaches the target depth.

6. The construction coordination method according to claim 5, characterized in that, Methods for controlling the spacing changes of support devices in the same group include: The motor is controlled to rotate, which drives the cylinder to swing, and the cylinder is controlled to extend until the connector is aligned with the connection hole of the support device above. The alignment is determined by analyzing the video monitoring. Control the rotation of the rotating ejector pin to push out the movable pin and engage it with the connecting hole; Control the two electric jacks to shorten the preset length, control the cylinder to extend to lower the support device, and control the cylinder to shorten to raise the support device. After lowering or raising the target height, control the two electric jacks to extend by a preset length, and then control the rotating pin to reset so that the movable pin exits the connecting hole; The motor is controlled to rotate, causing the cylinder to swing, and the cylinder is controlled to shorten, so that the lifting device is reset.

7. The construction coordination method according to claim 5 or 6, characterized in that, The construction collaboration method also includes the following steps: When construction equipment is working inside the foundation pit, the support device is raised to a height that is controlled within a preset distance from the construction equipment until it exceeds the top of the construction equipment. When the distance to the construction equipment exceeds a preset distance value, the already raised support device is controlled to descend to the height before coordination.

8. The construction coordination method according to claim 5 or 6, characterized in that, When backfilling the foundation pit, gradually control the spacing of the support devices in the same group to reduce until the minimum spacing is reached or the foundation pit is backfilled to the first predetermined depth; Continue backfilling the foundation pit, ensuring that the legs of all support devices are supported on the walers, and dismantle the support devices sequentially from top to bottom, controlling the legs to detach from the walers during dismantling.

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