Foundation pit side wall gradient self-adaption reinforcing device based on sewage pipe network construction

Abstract

The invention relates to the technical field of foundation pit reinforcement, and discloses a foundation pit side wall gradient self-adaptive reinforcing device based on sewage pipe network construction, which comprises a supporting bottom plate, a position control mechanism is arranged on the upper wall of the supporting bottom plate, and a reinforcing support plate assembly is arranged at one end, far away from the supporting bottom plate, of the position control mechanism. An electric push rod is started, when the output end of the electric push rod stretches out and draws back, a transfer rod is driven to rotate, the transfer rod pulls a sliding connection block to slide in a movable channel of a position control main rod through a side connection rod, the inclination angle of the position control main rod can be changed through sliding of the sliding connection block, and when the electric push rod stretches out, the position control main rod rotates in the direction close to the side wall, and the supporting force is increased; when the electric push rod is shortened, the position control main rod rotates outwards, part of pressure is released to adapt to side wall tiny springback, the design breaks through fixed parameter limitation of traditional static supporting, supporting force is dynamically compensated in real time according to the side wall pressure, and hysteresis of manual temporary reinforcing is avoided.

Description

Technical Field

[0001] This invention relates to the field of foundation pit reinforcement technology, and in particular to an adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction. Background Technology

[0002] In the grand blueprint of urban infrastructure construction, sewage pipe network projects play a crucial role in maintaining the city's "blood circulation," and their smooth operation directly affects the quality of the urban environment and the quality of life for residents. With the continuous advancement of urbanization, the demand for upgrading existing sewage pipe networks and expanding new networks is becoming increasingly urgent. Construction scenarios are also gradually moving from open suburbs into densely built-up urban core areas with crisscrossing underground pipelines, leading to an exponential increase in the complexity of the construction environment. As a core preliminary step in sewage pipe network construction, the stability of the foundation pit excavation is always paramount for project safety management. The burial depth of sewage pipe networks typically needs to meet technical requirements such as anti-freezing and anti-interference, resulting in generally large excavation depths, sometimes exceeding 10 meters in some areas. The stability of the foundation pit sidewalls is highly susceptible to the combined effects of multiple factors: Firstly, the distribution of urban underground soil layers exhibits significant heterogeneity, alternating between miscellaneous fill, silty clay, silty soil, and gravel layers. The shear strength, compression modulus, and other mechanical parameters of different soil layers vary considerably, easily leading to uneven deformation of the sidewall soil during excavation and unloading. Secondly, dynamic disturbances during construction, such as the mechanical vibration of excavators, the reciprocating load of muck trucks, and the additional pressure from earthwork stacking, are transmitted to the sidewalls through the soil medium, further exacerbating the risk of tilting deformation. Traditional foundation pit support technologies are increasingly revealing their significant shortcomings when dealing with such complex scenarios. Conventional methods such as soil nailing walls and pile support often adopt static support modes with preset parameters. The core parameters of the support structure, such as the support force and the spacing of the piles, are fixed before construction. This makes it difficult to respond to the real-time dynamic changes in the inclination of the sidewall during the excavation of the foundation pit. When the inclination of the sidewall exceeds the expectation, it is often necessary to use remedial measures such as manual temporary support or grouting reinforcement. This is not only cumbersome and inefficient, but may also lead to sidewall collapse accidents due to untimely reinforcement, resulting in project delays and economic losses. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing technology mainly adopts a static support mode with preset parameters. The core parameters such as the support force and the spacing of the support structure are fixed before construction, which makes it difficult to respond to the real-time dynamic changes in the inclination of the sidewall during the excavation of the foundation pit. To this end, we propose an adaptive reinforcement device for the inclination of the sidewall of the foundation pit based on the construction of sewage pipe network.

[0004] To achieve the above objectives, this application adopts the following technical solution: an adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction, comprising a supporting base plate, a positioning mechanism provided on the upper wall of the supporting base plate, a reinforcement support plate assembly provided at the end of the positioning mechanism away from the supporting base plate, the positioning mechanism comprising a first connecting block and a second connecting block fixedly connected to the upper wall of the supporting base plate, a positioning main rod axially connected to the inner wall of the first connecting block, an electric push rod axially connected to the inner wall of the second connecting block, movable channels provided on both sides of the positioning main rod, a sliding block slidably connected to the inner wall of the movable channel, a side connecting rod rotatably connected to the outer wall of the sliding block, a central connecting rod rotatably connected to the end of the side connecting rod away from the sliding block, and the outer wall of the central connecting rod axially connected to the output end of the electric push rod.

[0005] Furthermore, the reinforced support plate assembly includes a mounting block with one end fixedly connected to the control main rod, a central support plate axially connected to the end of the mounting block away from the control main rod, a side support plate axially connected to one end of the central support plate, and an adaptive connecting rod assembly axially connected to one end of the mounting block. The end of the adaptive connecting rod assembly away from the mounting block is fixedly connected to the side support plate.

[0006] Furthermore, two sets of both the side support plate and the adaptive connecting rod assembly are provided, and both the side support plate and the adaptive connecting rod assembly are symmetrically distributed about the center of the mounting block.

[0007] Furthermore, the adaptive connecting rod assembly includes an outer frame that is shaft-connected to the mounting block, and an inner rod that is fixedly connected to the side support plate, wherein the inner rod is located inside the cavity of the outer frame.

[0008] Furthermore, one end of the inner connecting rod is fixedly connected to an adapter shaft, and both sides of the adapter shaft are rotatably connected to slider bodies. A sliding groove body is provided on the inner side wall of the outer frame cavity, and the slider body is slidably connected to the inner wall of the sliding groove body.

[0009] Furthermore, an elastic band is fixedly connected to the end of the adapter shaft away from the inner connecting rod, and the end of the elastic band away from the inner connecting rod is fixedly connected to the bottom of the outer frame cavity.

[0010] Furthermore, the outer walls of the central support plate and the side support plate are both fixedly connected with top block assemblies. Multiple sets of top block assemblies are provided, and they are all evenly distributed about the outer walls of the central support plate and the side support plate.

[0011] Furthermore, the top block assembly includes a top block body fixedly connected to the outer wall of the central support plate and the side support plate, and the top block body has an openable groove inside.

[0012] Furthermore, the inner wall of the movable groove is axially connected to a first pull rod and a second pull rod, and an elastic element is fixedly connected between the first pull rod and the second pull rod.

[0013] Furthermore, the main body of the top block has a hemispherical structure, and the main body of the top block, the first tie rod, and the second tie rod are all components made of rubber.

[0014] The technical effects and advantages of this invention are as follows:

[0015] In this invention, when the sidewall of the foundation pit tilts, the electric push rod is activated. As the output end of the electric push rod extends or retracts, it drives the central rotating rod to rotate. The central rotating rod, through the side connecting rod, pulls the sliding block to slide within the movable channel of the control main rod. Since the control main rod is shaft-connected to the first connecting block, the sliding of the sliding block changes the tilt angle of the control main rod. When the electric push rod extends, the control main rod rotates towards the sidewall, increasing the supporting force. When the electric push rod shortens, the control main rod rotates outward, releasing some pressure to accommodate the slight rebound of the sidewall. This design breaks through the fixed parameters of traditional static support. The limitation is that the support force is dynamically compensated in real time according to the side wall pressure, avoiding the lag of manual temporary reinforcement. It solves the problem of the static support mode that mostly uses preset parameters in conventional methods. The core parameters such as the support force and the spacing of the support structure are fixed before construction, which makes it difficult to respond to the real-time dynamic changes in the inclination of the side wall during the excavation of the foundation pit. When the inclination of the side wall exceeds the expectation, it is often necessary to use remedial measures such as manual temporary support or grouting reinforcement. This is not only cumbersome and inefficient, but may also cause side wall collapse accidents due to untimely reinforcement, resulting in project delays and economic losses.

[0016] In this invention, the central support plate is fixedly connected to the control rod as the main force-bearing unit. The side support plates on both sides are rotatable relative to the central support plate through shaft connection, forming a three-section structure with a fixed center and adjustable sides. When there are local protrusions or depressions in the side wall, the adaptive connecting rod assembly will adjust synchronously. The outer frame is shaft-connected to the mounting block, and the inner rod is fixed to the side support plate. When the side support plate rotates with the shape of the side wall, the inner rod slides in the cavity of the outer frame, driving the adapter shaft to move. At this time, the slider body on both sides of the adapter shaft slides smoothly along the slide groove body to ensure that the inner rod is subjected to balanced force. At the same time, the elastic band stretches or contracts according to the rotation direction of the side support plate, providing continuous pre-tightening force through elastic force, so that the side support plate is always tightly attached to the side wall. The two sets of symmetrically distributed side support plates and adaptive connecting rod assemblies can be adjusted independently to adapt to the irregular shapes of the left and right sides of the side wall, avoiding the phenomenon of excessive gap between the traditional integral support plate and the side wall. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0020] Figure 3 This is a schematic diagram of the control mechanism structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the reinforced support plate assembly structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the reinforced support plate assembly of the present invention from another perspective;

[0023] Figure 6 This is a schematic diagram of the adaptive connecting rod assembly structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the top block component structure of the present invention.

[0025] Legend: 1. Support base plate; 2. Positioning mechanism; 21. First connecting block; 22. Second connecting block; 23. Positioning main rod; 24. Electric push rod; 25. Movable channel; 26. Sliding block; 27. Side connecting rod; 28. Central connecting rod; 3. Reinforced support plate assembly; 31. Mounting block; 32. Central support plate; 33. Side connecting support plate; 34. Adaptive connecting rod assembly; 341. Outer frame; 342. Inner connecting rod; 343. Adapter shaft; 344. Slider body; 345. Slide body; 346. Elastic band; 35. Top block assembly; 351. Top block body; 352. Movable groove; 353. First pull rod; 354. Second pull rod; 355. Elastic element. Detailed Implementation

[0026] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0027] Reference Figures 1-7As shown, to address the problem that conventional static support methods often employ preset parameters, where core parameters such as the support structure's bearing capacity and spacing are fixed before construction, making it difficult to respond to real-time dynamic changes in sidewall inclination during excavation, and when sidewall inclination exceeds expectations, remedial measures such as manual temporary support or grouting reinforcement are often required. This process is not only cumbersome and inefficient, but may also lead to sidewall collapse due to untimely reinforcement, causing project delays and economic losses. Therefore, the following preferred technical solution is provided:

[0028] An adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction includes a supporting base plate 1. A positioning mechanism 2 is provided on the upper wall of the supporting base plate 1. A reinforcement support plate assembly 3 is provided at the end of the positioning mechanism 2 away from the supporting base plate 1. The positioning mechanism 2 includes a first connecting block 21 and a second connecting block 22 fixedly connected to the upper wall of the supporting base plate 1. A positioning main rod 23 is axially connected to the inner wall of the first connecting block 21, and an electric push rod 24 is axially connected to the inner wall of the second connecting block 22. Movable channels are provided on both sides of the positioning main rod 23. 25. A sliding block 26 is slidably connected to the inner wall of the active channel 25. A side connecting rod 27 is rotatably connected to the outer wall of the sliding block 26. A central connecting rod 28 is rotatably connected to the end of the side connecting rod 27 away from the sliding block 26. The outer wall of the central connecting rod 28 is connected to the output shaft of the electric push rod 24 to form a linkage structure. When the electric push rod 24 extends, the control rod 23 rotates towards the side wall to increase the support force. When the electric push rod 24 shortens, the control rod 23 rotates outward to release some pressure to adapt to the slight rebound of the side wall.

[0029] Specifically, the control mechanism 2 achieves dynamic adjustment of the support angle and force through a multi-bar linkage structure driven by an electric push rod, thereby responding to real-time tilt changes of the pit sidewall. When the pit sidewall tilts, the electric push rod is activated. When the output end of the electric push rod 24 extends or retracts, it drives the central rotating rod 28 to rotate. The central rotating rod 28 pulls the sliding block 26 through the side connecting rod 27 to slide within the movable channel 25 of the control main rod 23. Since the control main rod 23 is axially connected to the first connecting block 21, the sliding of the sliding block 26 will change the tilt angle of the control main rod 23. When the electric push rod 24 extends, the control main rod 23 rotates towards the sidewall, increasing the support force. When the electric push rod 24 shortens, the control main rod 23 rotates towards the sidewall, increasing the support force. 3. Rotating outwards releases some pressure to accommodate minor rebound of the sidewall. This design breaks through the limitations of fixed parameters in traditional static support. The support force is dynamically compensated in real time according to the sidewall pressure, avoiding the lag of temporary manual reinforcement. It solves the problem of conventional static support modes that mostly use preset parameters. The core parameters of the support structure, such as the support force and the spacing between the supports, are fixed before construction, making it difficult to respond to the real-time dynamic changes in the inclination of the sidewall during the excavation of the foundation pit. When the inclination of the sidewall exceeds the expectation, it is often necessary to use temporary manual support or grouting reinforcement as a remedial measure. This is not only cumbersome and inefficient, but may also cause sidewall collapse accidents due to untimely reinforcement, resulting in project delays and economic losses.

[0030] The reinforced support plate assembly 3 includes a mounting block 31 with one end fixedly connected to the control main rod 23. A central support plate 32 is axially connected to the end of the mounting block 31 away from the control main rod 23. A side support plate 33 is axially connected to one end of the central support plate 32. An adaptive connecting rod assembly 34 is axially connected to one end of the mounting block 31. The end of the adaptive connecting rod assembly 34 away from the mounting block 31 is fixedly connected to the side support plate 33. Both the side support plate 33 and the adaptive connecting rod assembly 34 are provided in two sets. The adaptive connecting rod assemblies 34 are symmetrically distributed about the center of the mounting block 31. The central support plate 32, as the main force-bearing unit, is fixedly connected to the control main rod 23. The side support plates 33 on both sides are rotatable relative to the central support plate 32 through shaft connection, forming a three-section structure with a fixed center and adjustable sides. The adaptive connecting rod assembly 34 includes an outer frame 341 that is axially connected to the mounting block 31, and an inner connecting rod 342 that is fixedly connected to the side support plates 33. The inner connecting rod 342 is located inside the cavity of the outer frame 341. One end of 42 is fixedly connected to a transition shaft 343, and both sides of the transition shaft 343 are rotatably connected to slider bodies 344. A groove body 345 is provided on the inner side wall of the outer frame 341 cavity. The slider body 344 is slidably connected to the inner wall of the groove body 345. An elastic band 346 is fixedly connected to the end of the transition shaft 343 away from the inner rod 342. The end of the elastic band 346 away from the inner rod 342 is fixedly connected to the bottom of the outer frame 341 cavity. The outer walls of the central support plate 32 and the side support plate 33 are both fixedly connected. There is a top block assembly 35, and multiple sets of top block assemblies 35 are provided, all of which are evenly distributed about the outer wall of the central support plate 32 and the side support plate 33. When the side support plate 33 rotates with the shape of the side wall, the inner rod 342 slides in the cavity of the outer frame 341, driving the adapter shaft 343 to move. The slider bodies 344 on both sides of the adapter shaft 343 slide along the slide groove body 345. At the same time, the elastic band 346 stretches or contracts according to the rotation direction of the side support plate 33, so that the side support plate 33 always fits tightly against the side wall.

[0031] Specifically, the reinforced support plate assembly 3 achieves a tight fit to the uneven sidewalls through a multi-segment hinged structure and an elastic adaptive component. The central support plate 32, as the main force-bearing unit, is fixedly connected to the control rod 23. The side support plates 33 on both sides are rotatable relative to the central support plate 32 through shaft connections, forming a three-segment structure with a fixed center and adjustable sides. When there are local protrusions or depressions in the sidewalls, the adaptive connecting rod assembly 34 will adjust synchronously. The outer frame 341 is axially connected to the mounting block 31, and the inner connecting rod 342 is fixed to the side support plates 33. When the side support plates 33 rotate with the shape of the sidewalls, the inner connecting rod... 342 slides within the cavity of the outer frame 341, driving the adapter shaft 343 to move. At this time, the slider bodies 344 on both sides of the adapter shaft 343 slide smoothly along the slide groove body 345, ensuring that the inner rod 342 is subjected to balanced force. Meanwhile, the elastic band 346 stretches or contracts according to the rotation direction of the side support plate 33, providing continuous pre-tightening force through elastic force, so that the side support plate 33 always fits tightly against the side wall. The two sets of symmetrically distributed side support plates 33 and the adaptive rod assembly 34 can be adjusted independently to adapt to the irregular shapes of the left and right sides of the side wall, avoiding the phenomenon of excessive gap between the traditional integral support plate and the side wall.

[0032] The top block assembly 35 includes a top block body 351 fixedly connected to the outer walls of the central support plate 32 and the side support plate 33. The top block body 351 has an internal movable groove 352. The inner wall of the movable groove 352 is axially connected to a first pull rod 353 and a second pull rod 354. An elastic element 355 is fixedly connected between the first pull rod 353 and the second pull rod 354. The top block body 351 has a hemispherical structure. The top block body 351, the first pull rod 353, and the second pull rod 354 are all made of rubber. When the top block body 351 is subjected to local pressure from the side wall, the first pull rod 353 and the second pull rod 354 inside will rotate around the axis in the movable groove 352, absorbing the pressure impact through the change of the included angle. At the same time, the elastic element 355 will deform accordingly according to the pressure. When the pressure increases, it compresses and stores energy; when the pressure decreases, it rebounds and resets, ensuring that the top block body 351 always remains in contact with the side wall.

[0033] Specifically, the top block assembly 35 further optimizes the microscopic fit between the support plate and the sidewall through a flexible buffer and elastic compensation structure. The hemispherical top block body 351 is in direct contact with the sidewall, and its rubber material has good deformation capability, which can adapt to the slight concavity and convexity of the sidewall. When the top block body 351 is subjected to local pressure from the sidewall, the first tie rod 353 and the second tie rod 354 inside will rotate around the axis in the movable groove 352, absorbing the pressure impact through the change of the included angle. At the same time, the elastic element 355 (such as a high-strength spring or elastic rubber column) will deform accordingly according to the pressure. When the pressure increases, it compresses and stores energy, and when the pressure decreases, it rebounds and resets, ensuring that the top block body 351 always keeps in contact with the sidewall. Multiple sets of evenly distributed top block assemblies 35 form a multi-point elastic support system, which not only avoids damage to the sidewall soil caused by excessive force at a single point, but also achieves full fit between the support plate and the sidewall through overall deformation compensation, improving the transmission efficiency of the support force.

[0034] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A self-adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction, characterized in that, The device includes a supporting base plate, and a positioning mechanism is provided on the upper wall of the supporting base plate. A reinforcing support plate assembly is provided at the end of the positioning mechanism away from the supporting base plate. The positioning mechanism includes a first connecting block and a second connecting block fixedly connected to the upper wall of the supporting base plate. A positioning main rod is axially connected to the inner wall of the first connecting block, and an electric push rod is axially connected to the inner wall of the second connecting block. Movable channels are provided on both sides of the positioning main rod. A sliding block is slidably connected to the inner wall of the movable channel. A side connecting rod is rotatably connected to the outer wall of the sliding block. A central connecting rod is rotatably connected to the end of the side connecting rod away from the sliding block. The outer wall of the central connecting rod is axially connected to the output end of the electric push rod.

2. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 1, characterized in that: The reinforced support plate assembly includes a mounting block with one end fixedly connected to the control main rod, a central support plate axially connected to the end of the mounting block away from the control main rod, a side support plate axially connected to one end of the central support plate, and an adaptive connecting rod assembly axially connected to one end of the mounting block. The end of the adaptive connecting rod assembly away from the mounting block is fixedly connected to the side support plate.

3. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 2, characterized in that: Two sets of both the side support plate and the adaptive connecting rod assembly are provided, and both the side support plate and the adaptive connecting rod assembly are symmetrically distributed about the center of the mounting block.

4. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 3, characterized in that: The adaptive connecting rod assembly includes an outer frame that is shaft-connected to the mounting block, and an inner rod that is fixedly connected to the side support plate. The inner rod is located inside the cavity of the outer frame.

5. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 4, characterized in that: One end of the inner connecting rod is fixedly connected to an adapter shaft, and both sides of the adapter shaft are rotatably connected to slider bodies. A sliding groove body is provided on the inner side wall of the outer frame cavity, and the slider body is slidably connected to the inner wall of the sliding groove body.

6. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 5, characterized in that: An elastic band is fixedly connected to the end of the adapter shaft away from the inner connecting rod, and the end of the elastic band away from the inner connecting rod is fixedly connected to the bottom of the outer frame cavity.

7. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 2, characterized in that: The outer walls of the central support plate and the side support plate are both fixedly connected to top block assemblies. Multiple sets of top block assemblies are provided, and they are all evenly distributed about the outer walls of the central support plate and the side support plate.

8. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 7, characterized in that: The top block assembly includes a top block body that is fixedly connected to the outer wall of the central support plate and the side support plate, and the top block body has a movable groove inside.

9. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 8, characterized in that: The inner wall of the movable groove is axially connected to a first pull rod and a second pull rod, and an elastic element is fixedly connected between the first pull rod and the second pull rod.

10. The adaptive reinforcement device for the inclination of the foundation pit sidewall based on sewage pipe network construction according to claim 9, characterized in that: The main body of the top block has a hemispherical structure, and the main body of the top block, the first tie rod, and the second tie rod are all components made of rubber.

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