Groove excavation tool type temporary supporting structure and rapid construction method

Abstract

The invention relates to the technical field of building construction, in particular to a groove excavation tool type temporary supporting structure and a rapid construction method. The groove excavation tool type temporary supporting structure comprises two protection plates and two abutting assemblies, and each abutting assembly is connected with the two protection plates; each set of abutting assembly comprises two C-shaped plates, two connecting bases, a force application piece, a bidirectional screw, two displacement pieces and a collapse early warning unit, the two C-shaped plates are fixedly connected with the corresponding protective plates, the two connecting bases are arranged in the corresponding C-shaped plates, the force application pieces are fixedly connected with the bidirectional screws, and the two displacement pieces are fixedly connected with the collapse early warning unit. The two displacement parts are matched with the threads at the two ends of the two-way screw correspondingly, and the two displacement parts are hinged to the corresponding connecting bases correspondingly, so that the problems that in the prior art, a protection plate adopted in a supporting mode is simple in structure, deformation is prone to being caused by impact or uneven pressure bearing, the collapse early warning function is not achieved, and the supporting effect is poor are solved. And timely and effective safety early warning information is difficult to provide for construction personnel.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a trench excavation tool-type temporary support structure and a rapid construction method. Background Technology

[0002] In the field of municipal engineering, trench excavation is a common and critical construction operation in various scenarios, including the widening and renovation of urban roads, the construction of underground utility tunnels, pipeline laying (including water supply, drainage, gas, electricity, and communication pipelines), and foundation construction (such as trench preparation before deep foundation pit excavation). During trench excavation, the natural stress balance of the soil is disrupted, generating inward earth pressure on the trench sidewalls. Without timely and effective support measures, the sidewalls are prone to collapse, posing a direct threat to construction workers and machinery within the trench. This can also lead to serious problems such as ground subsidence, building tilting and cracking, and underground pipeline rupture, severely impacting construction safety and the stability of the surrounding environment. Therefore, to ensure the safe and orderly progress of construction and protect surrounding buildings, underground pipelines, and roads from damage, temporary support structures are typically used to reinforce the trench sidewalls.

[0003] However, the existing support methods use simple protective plate structures, which are prone to deformation due to impact or uneven pressure, and lack collapse early warning functions, making it difficult to provide timely and effective safety warning information for construction workers. Summary of the Invention

[0004] The purpose of this invention is to provide a tool-type temporary support structure for trench excavation and a rapid construction method, which aims to solve the technical problems of the simple support plate structure used in the existing support methods, which is prone to deformation due to impact or uneven pressure, and lacks collapse early warning function, making it difficult to provide timely and effective safety early warning information for construction personnel.

[0005] To achieve the above objectives, the present invention employs a trench excavation tool-type temporary support structure, comprising two protective plates and two sets of abutment components. Each set of abutment components is connected to the two protective plates, and the two sets of abutment components are symmetrically arranged.

[0006] Each set of the supporting components includes two C-shaped plates, two connecting seats, a force-applying component, a bidirectional screw, two displacement components, and a collapse warning unit. The two C-shaped plates are respectively fixedly connected to the corresponding protective plates. The two connecting seats are respectively disposed in the corresponding C-shaped plates. The force-applying component is fixedly connected to the bidirectional screw. The two displacement components are respectively threaded to both ends of the bidirectional screw, and the two displacement components are respectively hinged to the corresponding connecting seats.

[0007] The collapse early warning unit includes a stress sensor, a data acquisition layer, an edge computing layer, an analysis and processing layer, and an early warning module.

[0008] Multiple stress sensors are evenly distributed and installed inside the protective plate. The data acquisition layer is connected to the stress sensors, the edge computing layer is connected to the data acquisition layer, the analysis and processing layer is connected to the edge computing layer, and the early warning module is connected to the analysis and processing layer.

[0009] The protective plate includes an impact-resistant layer, a sensing layer, and a pressure-bearing layer, with the sensing layer disposed between the impact-resistant layer and the pressure-bearing layer.

[0010] The impact-resistant layer is a basalt fiber reinforced engineering plastic with a thickness of 3-5 mm and a basalt fiber content of 15-20 wt%.

[0011] The sensing layer uses a silicone carrier mesh into which the stress sensor is embedded, with a mesh spacing of 120-150mm, and the surface of the stress sensor is covered with a flame-retardant polyurethane sealing layer.

[0012] The pressure-bearing layer is a hot-pressed composite of corrugated steel plate and carbon fiber / epoxy resin prepreg.

[0013] An acoustic emission sensor array is installed on the inner side of the pressure-bearing layer, with a sampling frequency of 1.2MHz;

[0014] The analysis and processing layer is configured with a multi-source fusion algorithm.

[0015] The displacement component includes a wedge rod, a round shaft, and a support block. The round shaft is fixedly connected to the connecting seat, the support block is rotatably connected to the round shaft, the wedge rod is threadedly engaged with the bidirectional screw, and the wedge rod is fixedly connected to the support block.

[0016] The force-applying component includes a force-applying rod and an anti-slip strip. The force-applying rod is fixedly connected to the bidirectional screw, and the anti-slip strip is fixedly connected to the force-applying rod.

[0017] The trench excavation tool-type temporary support structure also includes fasteners and nuts. The C-shaped plate has multiple through holes. The connecting seat is slidably connected to the C-shaped plate. The fasteners, nuts, and through holes cooperate to limit the position of the connecting seat.

[0018] This invention also provides a rapid construction method for trench excavation tool-type temporary support, applicable to the trench excavation tool-type temporary support structure described above.

[0019] Includes the following steps:

[0020] A 3D point cloud model of the trench wall is generated by laser scanning, and the optimal tilt angle of the guard plate is generated.

[0021] The two protective plates are placed parallel to each other on both sides of the groove. The position of the connecting seat is adjusted, and the connecting seat is limited by the fasteners, nuts and through holes.

[0022] Based on the calculated optimal tilt angle, the force-applying component is rotated to drive the bidirectional screw to rotate, causing the two displacement components to move synchronously in opposite directions, pushing the connecting seat to drive the guard plate to press against the trench wall;

[0023] When the stress sensor displays a pressure value that reaches a preset threshold, the support is complete.

[0024] After the support is completed, the data acquisition layer acquires the stress sensor data at a frequency of 100Hz. The edge computing layer performs wavelet noise reduction and short-term trend analysis. If the stress fluctuation is greater than 15% within 5 seconds, and the acoustic emission energy in the same area increases by 300% within 0.1 seconds and lasts for more than 0.5 seconds, the analysis and processing layer is triggered to start the calculation of the improved Drucker-Prager model.

[0025] When the model predicts a collapse risk probability greater than 5%, the early warning module issues an audible and visual alarm and locates the high-risk area of ​​the protective panel.

[0026] When the data acquisition layer acquires stress sensor data at a frequency of 100Hz, it divides the protective plate into 6×6 grid independent monitoring areas.

[0027] The edge computing layer uses an LSTM neural network to predict the stress change trend in the next 30 seconds. The input parameters include soil type, water content, and historical stress change rate characteristics.

[0028] This invention discloses a tool-type temporary support structure and rapid construction method for trench excavation. In practical use, this invention employs a structure containing two aforementioned protective plates and two sets of symmetrical abutment components. The abutment components precisely adjust and stabilize the protective plates, enhancing overall stability, effectively resisting impact, evenly distributing pressure, and reducing the risk of protective plate deformation. In the collapse early warning unit, the stress sensors evenly distributed within the protective plates, in conjunction with the data acquisition layer, the edge computing layer, the analysis and processing layer, and the early warning module, achieve real-time monitoring and timely early warning, overcoming the deficiency of existing support systems lacking early warning functionality. Furthermore, the protective plates feature a layered design, with the impact-resistant layer, the sensing layer, and the pressure-bearing layer working synergistically to optimize performance, extend service life, and comprehensively ensure construction safety and smooth progress. Moreover, this tool-type temporary support structure for trench excavation can be used for trenches with different slopes. This approach solves the technical problems of existing support methods, which use simple protective plate structures that are prone to deformation due to impact or uneven pressure, and lack collapse early warning functionality, making it difficult to provide timely and effective safety warning information to construction personnel. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a perspective view of the trench excavation tool-type temporary support structure of the present invention.

[0031] Figure 2 This is a side view of the trench excavation tool-type temporary support structure of the present invention.

[0032] Figure 3 This is the invention Figure 1 Enlarged view of the local structure at point A.

[0033] Figure 4 This is a cross-sectional view of the protective plate of the present invention.

[0034] Figure 5 This is a schematic diagram of the collapse early warning unit of the present invention.

[0035] 1-Guard plate, 2-C-shaped plate, 3-Connecting seat, 4-Bidirectional screw, 5-Impact layer, 6-Sensing layer, 7-Pressure-bearing layer, 8-Matching rod, 9-Round shaft, 10-Support block, 11-Force application rod, 12-Anti-slip strip, 13-Fastener, 14-Nut, 15-Through hole, 16-Stress sensor, 17-Data acquisition layer, 18-Edge computing layer, 19-Analysis and processing layer, 20-Early warning module, 21-AR safety helmet, 22-Algorithm optimization layer. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0037] Please see Figures 1 to 5 , Figure 1 This is a perspective view of the trench excavation tool-type temporary support structure of the present invention. Figure 2 This is a side view of the trench excavation tool-type temporary support structure of the present invention. Figure 3 This is the invention Figure 1 Enlarged view of the local structure at point A. Figure 4 This is a cross-sectional view of the protective plate of the present invention. Figure 5 This is a schematic diagram of the collapse early warning unit of the present invention.

[0038] The present invention provides a trench excavation tool-type temporary support structure, including two protective plates 1 and two sets of abutment components. Each set of abutment components is connected to the two protective plates 1, and the two sets of abutment components are symmetrically arranged.

[0039] Each set of the supporting components includes two C-shaped plates 2, two connecting seats 3, a force-applying component, a bidirectional screw 4, two displacement components, and a collapse warning unit. The two C-shaped plates 2 are respectively fixedly connected to the corresponding guard plate 1. The two connecting seats 3 are respectively disposed in the corresponding C-shaped plates 2. The force-applying component is fixedly connected to the bidirectional screw 4. The two displacement components are respectively threaded to both ends of the bidirectional screw 4, and the two displacement components are respectively hinged to the corresponding connecting seats 3.

[0040] The collapse early warning unit includes a stress sensor 16, a data acquisition layer 17, an edge computing layer 18, an analysis and processing layer 19, and an early warning module 20. Multiple stress sensors 16 are evenly distributed and installed inside the protective plate 1. The data acquisition layer 17 is connected to the stress sensor 16, the edge computing layer 18 is connected to the data acquisition layer 17, the analysis and processing layer 19 is connected to the edge computing layer 18, and the early warning module 20 is connected to the analysis and processing layer 19.

[0041] The protective plate 1 includes an impact-resistant layer 5, a sensing layer 6, and a pressure-bearing layer 7, with the sensing layer 6 disposed between the impact-resistant layer 5 and the pressure-bearing layer 7.

[0042] The impact-resistant layer 5 is a basalt fiber reinforced engineering plastic with a thickness of 3-5 mm and a basalt fiber content of 15-20 wt%.

[0043] The sensing layer 6 uses a silicone carrier mesh into which the stress sensor 16 is implanted, with a mesh spacing of 120-150mm. The surface of the stress sensor 16 is covered with a flame-retardant polyurethane sealing layer.

[0044] The pressure-bearing layer 7 is a hot-pressed composite of corrugated steel plate and carbon fiber / epoxy resin prepreg.

[0045] An acoustic emission sensor array is arranged on the inner side of the pressure-bearing layer 7, with a sampling frequency of 1.2MHz;

[0046] The analysis and processing layer 19 is configured with a multi-source fusion algorithm.

[0047] In this specific embodiment, the present invention employs a structure comprising two aforementioned protective plates 1 and two sets of symmetrical abutment components. The abutment components precisely adjust and stabilize the protective plates 1, enhancing overall stability, effectively resisting impact, uniformly distributing pressure, and reducing the risk of deformation of the protective plates 1. In the collapse early warning unit, the stress sensors 16 uniformly distributed within the protective plates 1, in conjunction with the data acquisition layer 17, the edge computing layer 18, the analysis and processing layer 19, and the early warning module 20, achieve real-time monitoring and timely early warning, compensating for the lack of early warning functionality in existing supports. Furthermore, the layered design of the protective plates 1, with the impact-resistant layer 5, the sensing layer 6, and the pressure-bearing layer 7 working synergistically, optimizes performance, extends service life, and comprehensively ensures construction safety and smooth progress. Moreover, the trench excavation tool-type temporary support structure can be used for trenches with different slopes. This addresses the technical problems of existing support methods where the protective plate 1 structure is simple, easily deformed due to impact or uneven pressure, and lacks collapse early warning functionality, making it difficult to provide timely and effective safety warning information to construction personnel.

[0048] The displacement component includes a wedge rod 8, a round shaft 9, and a support block 10. The round shaft 9 is fixedly connected to the connecting seat 3, the support block 10 is rotatably connected to the round shaft 9, the wedge rod 8 is threadedly engaged with the bidirectional screw 4, and the wedge rod 8 is fixedly connected to the support block 10.

[0049] In this specific embodiment, by rotating the force-applying component, the force-applying component drives the screw to rotate, and the screw drives the engaging rod 8 to move. The engaging rod 8 then drives the round shaft 9 to move through the support block 10, and the round shaft 9 can then drive the corresponding guard plate 1 to move.

[0050] Secondly, the force-applying component includes a force-applying rod 11 and an anti-slip strip 12. The force-applying rod 11 is fixedly connected to the bidirectional screw 4, and the anti-slip strip 12 is fixedly connected to the force-applying rod 11.

[0051] In this specific embodiment, the force-applying rod 11 can more easily rotate the screw, and the anti-slip strip 12 is used to improve the anti-slip effect.

[0052] Meanwhile, the trench excavation tool-type temporary support structure also includes fasteners 13 and nuts 14. The C-shaped plate 2 has multiple through holes 15. The connecting seat 3 is slidably connected to the C-shaped plate 2. The fasteners 13, nuts 14 and through holes 15 cooperate to limit the position of the connecting seat 3.

[0053] In this specific embodiment, by setting the fastener 13 and the nut 14, the connecting seat 3 can slide to a designated position within the C-shaped plate 2, and then the fastener 13, the nut 14, and the through hole 15 cooperate to limit the position of the connecting seat 3.

[0054] Furthermore, the collapse early warning unit also includes an AR safety helmet 21, which is connected to the early warning module 20.

[0055] In this specific embodiment, the early warning module 20 is linked with the AR safety helmet 21 to mark the high-risk areas of the protective plate 1 (highlighted red grid) in the worker's field of vision in real time and display the escape route plan.

[0056] Furthermore, the collapse early warning unit also includes an algorithm optimization layer 22, which is connected to the analysis and processing layer 19.

[0057] In this specific implementation, the algorithm optimization layer 22 can dynamically adjust the analysis threshold in the risk analysis and processing layer 19 based on the excavation depth and soil type (preset database) (e.g., the threshold for sandy soil is reduced from 5% to 3%).

[0058] In the trench excavation tool-type temporary support structure of the present invention, in specific use, the present invention adopts a structure containing two aforementioned protective plates 1 and two sets of symmetrical abutment components. The abutment components precisely adjust and stabilize the protective plates 1, enhancing overall stability, effectively resisting impact, evenly distributing pressure, and reducing the risk of deformation of the protective plates 1. In the collapse early warning unit, the stress sensors 16 evenly distributed within the protective plates 1, in conjunction with the data acquisition layer 17, the edge computing layer 18, the analysis and processing layer 19, and the early warning module 20, realize real-time monitoring and timely early warning. This design overcomes the shortcomings of existing support systems that lack early warning functionality. Furthermore, the layered design of the protective plate 1, with its impact-resistant layer 5, sensing layer 6, and pressure-bearing layer 7 working synergistically, optimizes performance, extends service life, and comprehensively ensures construction safety and smooth progress. Moreover, the trench excavation tool-type temporary support structure can be used for trenches with varying slopes. This addresses the technical problems of existing support methods where the protective plate 1 structure is simple, easily deformed due to impact or uneven pressure, and lacks collapse early warning functionality, making it difficult to provide timely and effective safety warning information to construction personnel.

[0059] This invention also provides a rapid construction method for trench excavation tool-type temporary support, applicable to the trench excavation tool-type temporary support structure described above.

[0060] Includes the following steps:

[0061] A three-dimensional point cloud model of the trench wall is generated by laser scanning, and the optimal tilt angle of the guard plate 1 is generated.

[0062] The two guard plates 1 are placed parallel to each other on both sides of the groove. The position of the connecting seat 3 is adjusted, and the connecting seat 3 is limited by the fastener 13, the nut 14 and the through hole 15.

[0063] Based on the calculated optimal tilt angle, the force-applying component is rotated to drive the bidirectional screw 4 to rotate, causing the two displacement components to move synchronously in opposite directions, pushing the connecting seat 3 to drive the guard plate 1 to press against the trench wall;

[0064] When the stress sensor 16 displays a pressure value that reaches a preset threshold, the support is complete.

[0065] After the support is completed, the data acquisition layer 17 acquires the data of the stress sensor 16 at a frequency of 100Hz. The edge computing layer 18 performs wavelet noise reduction and short-term trend analysis. If the stress fluctuation is greater than 15% within 5 seconds, and the acoustic emission energy in the same area increases by 300% within 0.1 seconds and lasts for more than 0.5 seconds, the analysis and processing layer 19 is triggered to start the calculation of the improved Drucker-Prager model.

[0066] When the model predicts a collapse risk probability greater than 5%, the early warning module 20 issues an audible and visual alarm and locates the high-risk area of ​​the protective plate 1.

[0067] When the data acquisition layer 17 acquires data from the stress sensor 16 at a frequency of 100Hz, it divides the protective plate 1 into a 6×6 grid of independent monitoring areas.

[0068] The edge computing layer 18 uses an LSTM neural network to predict the stress change trend in the next 30 seconds. The input parameters include soil type, water content, and historical stress change rate characteristics.

[0069] During the excavation process, the trench wall is scanned with ground-penetrating radar every 30 minutes, and the soil fracture data is input into the analysis and processing layer 19 to correct the soil stability model parameters in real time.

[0070] Using the trench excavation tool-type temporary support structure and rapid construction method of the present invention, in specific use, the present invention adopts a structure containing two aforementioned protective plates 1 and two sets of symmetrical abutment components. The abutment components precisely adjust and stabilize the protective plates 1, enhancing overall stability, effectively resisting impact, uniformly distributing pressure, and reducing the risk of deformation of the protective plates 1. In the collapse early warning unit, the stress sensors 16 uniformly distributed within the protective plates 1, in conjunction with the data acquisition layer 17, the edge computing layer 18, the analysis and processing layer 19, and the early warning module 20, achieve real-time monitoring and... Timely early warning compensates for the lack of early warning function in existing support systems; moreover, the layered design of the protective plate 1, with the impact-resistant layer 5, the sensing layer 6, and the pressure-bearing layer 7 working together, optimizes performance, extends service life, and comprehensively ensures construction safety and smooth progress. Furthermore, the trench excavation tool-type temporary support structure can be used for trenches with different slopes. In this way, it solves the technical problems of existing support methods where the protective plate 1 structure is simple, easily deformed due to impact or uneven pressure, and lacks collapse early warning function, making it difficult to provide timely and effective safety early warning information to construction personnel.

[0071] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A tool-type temporary support structure for trench excavation, characterized in that, It includes two protective plates and two sets of abutment components, each set of abutment components is connected to the two protective plates, and the two sets of abutment components are arranged symmetrically; Each set of the supporting components includes two C-shaped plates, two connecting seats, a force-applying component, a bidirectional screw, two displacement components, and a collapse warning unit. The two C-shaped plates are respectively fixedly connected to the corresponding protective plates. The two connecting seats are respectively disposed in the corresponding C-shaped plates. The force-applying component is fixedly connected to the bidirectional screw. The two displacement components are respectively threaded to both ends of the bidirectional screw, and the two displacement components are respectively hinged to the corresponding connecting seats. The collapse early warning unit includes a stress sensor, a data acquisition layer, an edge computing layer, an analysis and processing layer, and an early warning module. Multiple stress sensors are evenly distributed and installed inside the protective plate. The data acquisition layer is connected to the stress sensor, the edge computing layer is connected to the data acquisition layer, the analysis and processing layer is connected to the edge computing layer, and the early warning module is connected to the analysis and processing layer. The protective plate includes an impact-resistant layer, a sensing layer, and a pressure-bearing layer, with the sensing layer disposed between the impact-resistant layer and the pressure-bearing layer.

2. The trench excavation tool-type temporary support structure as described in claim 1, characterized in that, The impact-resistant layer is a basalt fiber reinforced engineering plastic with a thickness of 3-5 mm and a basalt fiber content of 15-20 wt%. The sensing layer uses a silicone carrier mesh into which the stress sensor is embedded, with a mesh spacing of 120-150mm, and the surface of the stress sensor is covered with a flame-retardant polyurethane sealing layer. The pressure-bearing layer is a hot-pressed composite of corrugated steel plate and carbon fiber / epoxy resin prepreg.

3. The trench excavation tool-type temporary support structure as described in claim 2, characterized in that, An array of acoustic emission sensors is installed on the inner side of the pressure-bearing layer, with a sampling frequency of 1.2MHz; The analysis and processing layer is configured with a multi-source fusion algorithm.

4. The trench excavation tool-type temporary support structure as described in claim 3, characterized in that, The displacement component includes a wedge rod, a round shaft, and a support block. The round shaft is fixedly connected to the connecting seat, the support block is rotatably connected to the round shaft, the wedge rod is threadedly engaged with the bidirectional screw, and the wedge rod is fixedly connected to the support block.

5. The trench excavation tool-type temporary support structure as described in claim 4, characterized in that, The force-applying component includes a force-applying rod and an anti-slip strip. The force-applying rod is fixedly connected to the bidirectional screw, and the anti-slip strip is fixedly connected to the force-applying rod.

6. The trench excavation tool-type temporary support structure as described in claim 5, characterized in that, The trench excavation tool-type temporary support structure also includes fasteners and nuts. The C-shaped plate has multiple through holes. The connecting seat is slidably connected to the C-shaped plate. The fasteners, nuts, and through holes cooperate to limit the position of the connecting seat.

7. A rapid construction method for trench excavation tool-type temporary support, applied to the trench excavation tool-type temporary support structure as described in claim 6, characterized in that, Includes the following steps: A 3D point cloud model of the trench wall is generated by laser scanning, and the optimal tilt angle of the guard plate is generated. The two protective plates are placed parallel to each other on both sides of the groove. The position of the connecting seat is adjusted, and the connecting seat is limited by the fasteners, nuts and through holes. Based on the calculated optimal tilt angle, the force-applying component is rotated to drive the bidirectional screw to rotate, causing the two displacement components to move synchronously in opposite directions, pushing the connecting seat to drive the guard plate to press against the trench wall; When the stress sensor displays a pressure value that reaches a preset threshold, the support is complete. After the support is completed, the data acquisition layer acquires the stress sensor data at a frequency of 100Hz. The edge computing layer performs wavelet noise reduction and short-term trend analysis. If the stress fluctuation is greater than 15% within 5 seconds, and the acoustic emission energy in the same area increases by 300% within 0.1 seconds and lasts for more than 0.5 seconds, the analysis and processing layer is triggered to start the calculation of the improved Drucker-Prager model. When the model predicts a collapse risk probability greater than 5%, the early warning module issues an audible and visual alarm and locates the high-risk area of ​​the protective panel.

8. The rapid construction method for trench excavation tool-type temporary support as described in claim 7, characterized in that, When the data acquisition layer acquires stress sensor data at a frequency of 100Hz, it divides the protective plate into 6×6 grid independent monitoring areas.

9. The rapid construction method for trench excavation tool-type temporary support as described in claim 7, characterized in that, The edge computing layer uses an LSTM neural network to predict the stress change trend in the next 30 seconds. The input parameters include soil type, water content, and historical stress change rate characteristics.

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