Fabricated support construction method for local deepening part in foundation pit

Abstract

The invention discloses an assembly type support construction method for a local deepening part in a foundation pit and a foundation pit body, a first side wall plate is arranged on the inner wall of the foundation pit body, a second side wall plate is arranged on the side face of the first side wall plate, and a connecting piece assembly is arranged at the joint of the first side wall plate and the second side wall plate. A supporting assembly is arranged at the bottom end of the inner wall of the first side wall plate, the included angle of the connecting piece assembly in the first foundation pit body can be adjusted by controlling a first telescopic rod rotationally connected between the first connecting plate and the second connecting plate to stretch out and draw back, and the supporting assembly can be adjusted by adjusting the length of the first telescopic rod. The included angle between the first connecting plate and one side wall of the foundation pit body and the included angle between the second connecting plate and one side wall of the foundation pit body can be flexibly adjusted, so that soil pressure is more effectively resisted, and the overall stability of the supporting structure is improved; the bolt body can be prevented from loosening due to vibration or external force through clamping of the first arc-shaped block and the second arc-shaped block, and therefore the overall supporting capacity of the supporting structure is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of foundation pit support, and specifically to an assembled support construction method for locally deepened parts in a foundation pit. Background Art

[0002] Foundation pit engineering mainly includes excavation, dewatering, and support, and is a comprehensive systematic project. In the construction of building projects, the foundation and foundation engineering, as an important sub - project, plays a crucial role in the safe use of buildings. Facing diverse geological conditions across the country, it brings variability and challenges to the construction of the foundation and foundation. For foundation pits with large excavation depths and soft soil, the side walls are unstable after excavation in locally deepened parts such as sumps and lift wells, and are prone to landslides and collapses. Conventional methods such as constructing side walls with brick formwork or slope excavation are difficult to ensure the forming quality of the well pit side walls, and are prone to situations such as slope deformation and collapse or sand and soil loss. The engineering quality is not easy to control, and the construction efficiency is low and the cost is high.

[0003] The present invention uses GRC cement side wall support plates and supporting special connection and fixing parts for foundation pit support. There is an axial gap between the fixed component and the rotating component. When the articulated structure bears too much load, the pin shaft drives the bolt to translate or rotate relative to the end cover. The relative movement between the bolt and the end cover causes the bolt to gradually loosen, which will lead to the easy loosening of the end cover bolts of the articulated structure, reducing the product reliability and not meeting the customer's use requirements.

[0004] The tension of urban land use has promoted the continuous expansion of buildings and structures into the underground space, accelerating the development of urban underground space, and leading to the development of urban foundation pit excavation towards larger and deeper directions. Due to various factors, the foundation pit is placed for too long or the conditions around the foundation pit change, resulting in too large horizontal deformation of the foundation pit, far exceeding the limit given by the specification, and easily leading to safety accidents at the construction site. Therefore, emergency rescue equipment needs to be equipped during the foundation pit construction process. Once a warning of large deformation of the foundation pit occurs, there are two existing emergency rescue methods for foundation pits. One is to stack a large amount of rock and soil in the pit. This method requires finding a large amount of soil sources in the city in a short time, and has a large demand for rock and soil. If the stacking height and width are not enough, it cannot prevent the collapse of the foundation pit. The other is to use steel pipe inclined supports. When placing, first select the steel pipe according to the site conditions, and then pour a concrete base on the ground according to the length of the steel pipe. One end of the steel pipe is directly poured into the concrete base, and the other end supports the foundation pit support structure. The steel pipe is set as a whole in an inclined manner to form an inclined support. In the above - mentioned scheme, due to the long concrete casting and solidification time, the overall construction period is long, which cannot meet the requirements of timely rescue; and after the concrete solidifies, it is more difficult to remove later.

[0005] Therefore, it is necessary to provide a new assembled foundation pit construction rapid inclined support device to solve the above problems.

[0006] Therefore, an assembled support construction method for a locally deepened part in a foundation pit is proposed to solve the above problems. Summary of the Invention

[0007] In view of this, the technical problem to be solved by the present invention is to propose an assembled support construction method for a locally deepened part in a foundation pit to solve the problems that when the existing articulated structure bears too much load, the pin shaft drives the relative end of the bolt to translate or rotate relative to the end cover, the relative movement between the bolt and the end cover causes the bolt to gradually loosen, and the concrete pouring and solidification time is long, resulting in a long overall construction period and unable to meet the needs of timely emergency rescue.

[0008] To achieve the above object, the present invention provides the following technical solution: An assembled support construction device for a locally deepened part in a foundation pit, including: a foundation pit body, a side wall plate one is arranged on the inner wall of the foundation pit body, a side wall plate two is arranged on the side surface of the side wall plate one, a connecting piece assembly is arranged at the connection between the side wall plate one and the side wall plate two, and a support assembly is arranged at the bottom end of the inner wall of the side wall plate one.

[0009] As an improvement, the connecting piece assembly includes a connecting plate one, a connecting plate two is hinged on the outer surface of the connecting plate one, a rubber air bag is arranged at the axial gap between the connecting plate one and the connecting plate two, an arc plate one is fixedly connected to the surface of the connecting plate one close to the connecting plate two, an arc plate two is fixedly connected to the surface of the connecting plate two close to the connecting plate one, and a chute is arranged on the outer surface of the arc plate two.

[0010] As an improvement, a telescopic rod one is rotatably connected between the connecting plate one and the arc plate two, a protection assembly is arranged on the outer surfaces of the arc plate one and the arc plate two, the protection assembly includes a protection cover one, the protection cover one is fixedly connected to the surface of the arc plate one away from the arc plate two, a bolt body is slidably connected inside the chute opened on the arc plate two, and a protection cover two is fixedly connected to the end of the bolt body away from the arc plate one.

[0011] As an improvement, a contact point is arranged on the inner wall of the protection cover one, telescopic rods two are fixedly connected to both sides of the inner wall of the protection cover one, an auxiliary plate one is fixedly connected to the end of the telescopic rod two away from the protection cover one, two arc blocks one are rotatably connected to the surface of the auxiliary plate one away from the telescopic rod two, and two arc blocks two are rotatably connected to the surface of the arc block one away from the auxiliary plate one.

[0012] As an improvement, the telescopic rod one is electrically connected to the rubber air bag and controls the air intake and exhaust of the rubber air bag, and the telescopic rod two is electrically connected to the contact point.

[0013] As an improvement, the support assembly includes a third telescopic rod, and the third telescopic rod is rotatably connected to the bottom end of the inner wall of the first side wall plate. One end of the third telescopic rod away from the first side wall plate is rotatably connected to a connecting block. The bottom end of the first side wall plate is rotatably connected to a Y-shaped auxiliary plate, and the third telescopic rod is located above the Y-shaped auxiliary plate.

[0014] As an improvement, the first side wall plate is provided with a biaxial inclinometer. One end of the Y-shaped auxiliary plate away from the first side wall plate is rotatably connected to the connecting block. The bottom end of the connecting block is fixedly connected to a support circular plate, and a conical convex block is arranged on the bottom surface of the support circular plate. A telescopic plate is fixedly connected between the connecting block and the support circular plate. The biaxial inclinometer is electrically connected to the third telescopic rod. The support circular plate is provided with a pressure sensor, and the pressure sensor is electrically connected to the telescopic plate.

[0015] As an improvement, the support construction method includes:

[0016] Step 1: During construction, directly hoist the GRC cement board prefabricated foundation pit side wall plate into the foundation pit body by a crane, and fix it through pre-installed special connectors to form the side wall of the underground well pit.

[0017] Step 2: Since there is an axial gap between the first connecting plate and the second connecting plate, and a rubber airbag is arranged in the axial gap between the first connecting plate and the first arc-shaped plate. When the first telescopic rod expands and contracts, it can drive the first connecting plate and the second connecting plate to fit more closely to the inner wall of the foundation pit body. After the installation is completed, the rubber airbag is inflated to fill the axial gap.

[0018] Step 3: When fixing the angles of the first connecting plate and the second connecting plate through the bolt body, by extending the second telescopic rod, drive the first arc-shaped block and the second arc-shaped block to adaptively clamp the bolt body, ensuring that the first connecting plate and the second connecting plate maintain a stable angle during the force application process.

[0019] Compared with the prior art, the present invention provides an assembled support construction method for local deepening parts in a foundation pit, having the following beneficial effects:

[0020] 1. By controlling the telescopic rod one rotatably connected between the first connecting plate and the second connecting plate to expand and contract, the included angle of the connecting piece assembly in the first foundation pit body can be adjusted. By adjusting the length of the telescopic rod one, the included angles between the first connecting plate and the second connecting plate and the side wall of the first foundation pit body can be flexibly adjusted, so as to more effectively resist the earth pressure, improve the overall stability of the support structure, and the adjustment function of the telescopic rod one enables the first connecting plate and the second connecting plate to fit more closely to the side wall of the first foundation pit body, reducing the gap between the first connecting plate and the second connecting plate and the soil, thereby enhancing the support effect and preventing soil collapse. In addition, the telescopic rod one has the characteristic of being easy to adjust, and the construction personnel can quickly adjust the included angle between the first connecting plate and the second connecting plate according to the actual situation without complex disassembly and reinstallation work, thus saving a large amount of construction time.

[0021] 2. By extending the telescopic rod two and clamping the bolt body by the first arc-shaped block and the second arc-shaped block, the clamping of the first arc-shaped block and the second arc-shaped block can prevent the bolt body from loosening due to vibration or external force, thereby enhancing the overall support ability of the support structure, and can ensure that the first connecting plate and the second connecting plate maintain a stable angle during the force application process, avoiding structural deformation caused by angle change, and due to the rotational connection of the first arc-shaped block and the second arc-shaped block, it can adapt to bolt bodies of different sizes and shapes, thereby improving the applicability of the structure.

[0022] 3. By extending the telescopic rod three, the supporting circular plate is supported on the ground to provide additional supporting force, which can help the first side wall plate and the second side wall plate better resist deformation, which helps to maintain the stability of the structure of the first foundation pit body and prevent the deformation from further expanding, thereby ensuring the safety of the first foundation pit body. If the first foundation pit body deforms and the support structure is damaged, extending the telescopic rod three to provide support for the first side wall plate and the second side wall plate can make the repair work more convenient and fast. The construction personnel can repair the damaged support structure by adjusting the support assembly to restore its original support ability, and when the first side wall plate and the second side wall plate are subjected to greater force, by extending the telescopic plate to provide a larger force-bearing area for the first side wall plate and the second side wall plate, the support is made more stable. Description of the Drawings

[0023] Figure 1 It is a three-dimensional side view of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of the foundation pit of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the connecting piece assembly of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection relationship structure of the telescopic rod one of the present invention;

[0027] Figure 5Schematic diagram of an internal structure of the protective cover of the present invention;

[0028] Figure 6 Schematic diagram of the connection relationship structure of the bolt body of the present invention;

[0029] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at position A in

[0030] Figure 8 Schematic diagram of the support assembly of the present invention.

[0031] In the figure:

[0032] 1. Foundation pit body; 11. First side wall plate; 12. Second side wall plate; 2. Connector assembly; 21. First connecting plate; 22. Second connecting plate; 23. First arc-shaped plate; 24. Second arc-shaped plate; 25. First telescopic rod; 3. Protection assembly; 31. First protective cover; 32. Bolt body; 33. Second protective cover; 34. Second telescopic rod; 35. First auxiliary plate; 36. First arc-shaped block; 37. Second arc-shaped block; 4. Support assembly; 41. Third telescopic rod; 42. Y-shaped auxiliary plate; 43. Connecting block; 44. Support circular plate; 45. Telescopic plate. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0034] Next, the present invention will be further described in detail according to the drawings and embodiments.

[0035] Embodiment 1

[0036] The support construction method includes:

[0037] Step 1: During construction, directly hoist the GRC cement board prefabricated foundation pit side wall plate into the first foundation pit body 1 by a crane, and fix it through a pre-installed special connector to form the side wall of the underground well pit;

[0038] Step 2: Since there is an axial gap between the first connecting plate 21 and the second connecting plate 22, and a rubber airbag is arranged in the axial gap between the first connecting plate 21 and the first arc-shaped plate 23, when the first telescopic rod 25 expands and contracts, it can drive the first connecting plate 21 and the second connecting plate 22 to fit more closely to the inner wall of the first foundation pit body 1, and after the installation is completed, the rubber airbag is inflated to fill the axial gap;

[0039] Step 3: When fixing the angles of the first connecting plate 21 and the second connecting plate 22 through the bolt body 32, the elongation of the second telescopic rod 34 drives the first arc-shaped block 36 and the second arc-shaped block 37 to adaptively clamp the bolt body 32, ensuring that the first connecting plate 21 and the second connecting plate 22 maintain a stable angle during the force application process.

[0040] Embodiment 2

[0041] Please refer to Figures 1 to 8 as shown in

[0042] To solve the problems mentioned in the technical solution, the present application embodiment provides a fabricated support construction method for a locally deepened part in a foundation pit, including: a first foundation pit body 1, a first side wall plate 11 is provided on the inner wall of the first foundation pit body 1, a second side wall plate 12 is provided on the side of the first side wall plate 11, a connecting piece assembly 2 is provided at the connection between the first side wall plate 11 and the second side wall plate 12, and a support assembly 4 is provided at the bottom end of the inner wall of the first side wall plate 11.

[0043] The connecting piece assembly 2 includes a first connecting plate 21, a second connecting plate 22 is hinged on the outer surface of the first connecting plate 21, a rubber airbag is provided at the axial gap between the first connecting plate 21 and the second connecting plate 22, a first arc-shaped plate 23 is fixedly connected to the side of the first connecting plate 21 close to the second connecting plate 22, a second arc-shaped plate 24 is fixedly connected to the side of the second connecting plate 22 close to the first connecting plate 21, and a sliding groove is formed on the outer surface of the second arc-shaped plate 24.

[0044] A first telescopic rod 25 is rotatably connected between the first connecting plate 21 and the second arc-shaped plate 24, a protection assembly 3 is provided on the outer surfaces of the first arc-shaped plate 23 and the second arc-shaped plate 24, the protection assembly 3 includes a first protective cover 31, the first protective cover 31 is fixedly connected to the side of the first arc-shaped plate 23 away from the second arc-shaped plate 24, a bolt body 32 is slidably connected inside the sliding groove formed on the second arc-shaped plate 24, and a second protective cover 33 is fixedly connected to the end of the bolt body 32 away from the first arc-shaped plate 23.

[0045] Contacts are provided on the inner wall of the first protective cover 31, telescopic rods 34 are fixedly connected to both sides of the inner wall of the first protective cover 31, an auxiliary plate 35 is fixedly connected to the end of the telescopic rod 34 away from the first protective cover 31, two first arc-shaped blocks 36 are rotatably connected to the side of the auxiliary plate 35 away from the telescopic rod 34, and two second arc-shaped blocks 37 are rotatably connected to the side of the first arc-shaped block 36 away from the auxiliary plate 35.

[0046] The first telescopic rod 25 is electrically connected to the rubber airbag and controls the intake and exhaust of the rubber airbag, and the telescopic rod 34 is electrically connected to the contacts.

[0047] The support component 4 includes a telescopic rod three 41, and the telescopic rod three 41 is rotatably connected to the bottom end of the inner wall of the side wall plate one 11. One end of the telescopic rod three 41 away from the side wall plate one 11 is rotatably connected to a connecting block 43. The bottom end of the side wall plate one 11 is rotatably connected to a Y-shaped auxiliary plate 42, and the telescopic rod three 41 is located above the Y-shaped auxiliary plate 42.

[0048] The side wall plate one 11 is provided with a biaxial inclinometer. One end of the Y-shaped auxiliary plate 42 away from the side wall plate one 11 is rotatably connected to the connecting block 43. The bottom end of the connecting block 43 is fixedly connected to a support circular plate 44, and a conical protrusion is provided on the bottom surface of the support circular plate 44. A telescopic plate 45 is fixedly connected between the connecting block 43 and the support circular plate 44, and the biaxial inclinometer is electrically connected to the telescopic rod three 41. The support circular plate 44 is provided with a pressure sensor, and this pressure sensor is electrically connected to the telescopic plate 45.

[0049] Among them: The side wall plate one 11 is provided with a biaxial inclinometer. A rubber airbag is provided at the axial gap between the connecting plate one 21 and the connecting plate two 22. A chute is provided on the outer surface of the arc plate two 24. The telescopic rod one 25 is electrically connected to the rubber airbag and controls the intake and exhaust of the rubber airbag. The telescopic rod two 34 is electrically connected to the contact. Contacts are provided on the inner wall of the protective cover one 31. The bolt body 32 is threadedly connected to the arc plate one 23. A conical protrusion is provided on the bottom surface of the support circular plate 44. The biaxial inclinometer is electrically connected to the telescopic rod three 41. The support circular plate 44 is provided with a pressure sensor, and this pressure sensor is electrically connected to the telescopic plate 45. A return spring is fixedly connected between the support circular plate 44 and the Y-shaped auxiliary plate 42.

[0050] Compared with the comparative document, through the implementation of this embodiment, by controlling the telescopic movement of the telescopic rod one 25 rotatably connected between the connecting plate one 21 and the connecting plate two 22, the included angle of the connecting piece assembly 2 in the foundation pit body one 1 can be adjusted. By adjusting the length of the telescopic rod one 25, the included angles between the connecting plate one 21 and the connecting plate two 22 and the side wall of the foundation pit body one 1 can be flexibly adjusted, so as to more effectively resist the earth pressure, improve the overall stability of the support structure, and the adjustment function of the telescopic rod one 25 enables the connecting plate one 21 and the connecting plate two 22 to fit more closely to the side wall of the foundation pit body one 1, reducing the gap between the connecting plate one 21 and the connecting plate two 22 and the soil, thereby enhancing the support effect and preventing soil collapse. In addition, the telescopic rod one 25 has the characteristics of being easy to adjust. Construction workers can quickly adjust the included angle between the connecting plate one 21 and the connecting plate two 22 according to the actual situation without complicated disassembly and reinstallation work, thus saving a large amount of construction time.

[0051] The working principle of all the contents in the above embodiment is as follows:

[0052] During use, the GRC cement board prefabricated foundation pit side wall board is directly hoisted into the foundation pit body 1 by a crane and fixed by pre-installed special connectors to form the side wall of the underground well pit. During installation, a special connector that can freely adjust the angle according to the slope of the slope is used for connection and fixation to form the side wall of the underground well pit. In the prior art, the bolt body 32 is manually rotated, and the angle between the first connecting plate 21 and the second connecting plate 22 is adjusted manually. Since the bolt body 32 is threadedly connected inside the first arc-shaped plate 23, the second arc-shaped plate 24 is provided with a chute, and the bolt body 32 is slidably connected inside the chute. In the present invention, the angle between the first connecting plate 21 and the second connecting plate 22 is adjusted by the telescopic movement of the first telescopic rod 25. When the angle needs to be adjusted, the bolt body 32 is driven to rotate clockwise by a motor, so that the first arc-shaped plate 23 and the second arc-shaped plate 24 are no longer in close contact. Subsequently, the first telescopic rod 25 is driven to expand and contract according to actual needs. When the first side wall board 11 and the second side wall board 12 are in contact with the inner wall of the foundation pit body 1, the bolt body 32 is controlled to rotate counterclockwise, so that the first arc-shaped plate 23 and the second arc-shaped plate 24 are in close contact, thereby adjusting the angle between the first side wall board 11 and the second side wall board 12. By adjusting the length of the first telescopic rod 25, the angles between the first connecting plate 21 and the second connecting plate 22 and the side wall of the foundation pit body 1 can be flexibly adjusted, so as to more effectively resist the earth pressure and improve the overall stability of the support structure. Moreover, the adjustment function of the first telescopic rod 25 enables the first connecting plate 21 and the second connecting plate 22 to fit more closely to the side wall of the foundation pit body 1, reducing the gap between the first connecting plate 21 and the second connecting plate 22 and the soil, thereby enhancing the support effect and preventing soil collapse. In addition, the first telescopic rod 25 has the characteristic of being easy to adjust. Compared with adjusting the angle between the first connecting plate 21 and the second connecting plate 22 manually in the prior art, construction workers can quickly adjust the angle between the first connecting plate 21 and the second connecting plate 22 according to the actual situation without complex disassembly and reinstallation work, thus saving a large amount of construction time. Since protective covers 31 and 33 are provided on the outer surfaces of the first arc-shaped plate 23 and the bolt body 32, the bolt body 32 connected inside can be protected to prevent dust or other sundries generated during the operation in the foundation pit body 1 from affecting the use of the bolt body 32. When the bolt body 32 is tightened counterclockwise, since the inner wall of the protective cover 31 is provided with a contact point, and the contact point will be touched when the bolt body 32 is tightened. Since the second telescopic rod 34 is electrically connected to the contact point, that is, when the bolt body 32 touches the contact point, the second telescopic rod 34 extends, driving the first auxiliary plate 35, the first arc-shaped block 36 and the second arc-shaped block 37 to move towards the bolt body 32, and the bolt body 32 is adaptively clamped by the first arc-shaped block 36 and the second arc-shaped block 37. The clamping of the first arc-shaped block 36 and the second arc-shaped block 37 can prevent the bolt body 32 from loosening due to vibration or external force, thereby enhancing the overall supporting ability of the support structure and ensuring that the first connecting plate 21 and the second connecting plate 22 maintain a stable angle during the force application process.Avoid structural deformation caused by angle changes. Moreover, due to the rotational connection between the first arc-shaped block 36 and the second arc-shaped block 37, it can adapt to bolt bodies 32 of different sizes and shapes, thereby improving the applicability of the structure.

[0053] Since there is an axial gap between the first connecting plate 21 and the connecting piece assembly 2, a rubber airbag is provided at the axial gap between the first connecting plate 21 and the second connecting plate 22, and the first telescopic rod 25 is electrically connected to the rubber airbag. That is, when the first telescopic rod 25 stops telescoping, the rubber airbag inflates to ensure that there is no gap between the first connecting plate 21 and the second connecting plate 22. The flexibility and elasticity of the rubber airbag can well adapt to the axial gap between the first connecting plate 21 and the second connecting plate 22, thus effectively reducing the relative movement caused by the gap. Moreover, by filling the axial gap, the rubber airbag can reduce the structural looseness and damage caused by an excessive gap, thereby improving the stability and durability of the entire support structure. A stable connection structure can better withstand external loads and reduce the risk of safety accidents caused by connection failure. In addition, the installation of the rubber airbag is relatively simple and does not require a complex adjustment or calibration process. In terms of maintenance, the replacement and inspection of the rubber airbag are also relatively easy, reducing the maintenance cost and time.

[0054] Since the side wall plate 11 is provided with a biaxial inclinometer, that is, when the foundation pit body 1 is placed for too long or the surrounding conditions of the foundation pit body 1 change, resulting in the inclination of the side wall plate 11 and the side wall plate 12, because the biaxial inclinometer is electrically connected to the telescopic rod 41, the telescopic rod 41 is then driven to extend. The extension of the telescopic rod 41 drives the connecting block 43 rotatably connected thereto to move towards the ground. The movement of the connecting block 43 drives the supporting circular plate 44 fixedly connected thereto to move downward together. Since the bottom surface of the supporting circular plate 44 is provided with a conical protrusion, the side wall plate 11 and the side wall plate 12 are then supported by the supporting circular plate 44, which can help the side wall plate 11 and the side wall plate 12 better resist deformation, which helps to maintain the stability of the structure of the foundation pit body 1, prevent the deformation from further expanding, and thus ensure the safety of the foundation pit body 1. If the deformation of the foundation pit body 1 causes damage to the support structure, extending the telescopic rod 41 to provide support for the side wall plate 11 and the side wall plate 12 can make the repair work more convenient and fast. The construction workers can repair the damaged support structure by adjusting the support assembly 4 to restore its original support capacity. And when the side wall plate 11 and the side wall plate 12 are subjected to large forces, by extending the telescopic plate 45 to provide a larger force-bearing area for the side wall plate 11 and the side wall plate 12, the support is made more stable. In addition, the supporting circular plate 44 is provided with a pressure sensor, and the pressure sensor is electrically connected to the telescopic plate 45. When the pressure sensor detects that the pressure received by the supporting circular plate 44 is too large, the telescopic plate 45 is extended to increase its force-bearing area, thereby dispersing the pressure and reducing the pressure per unit area. This helps to prevent the supporting circular plate 44 from sinking or being damaged due to excessive pressure, and further ensures the stability of the support structure. And by dispersing the pressure and enhancing the bearing capacity of the foundation, extending the telescopic plate 45 helps to reduce the fatigue damage of the support structure caused by long-term stress, which can improve the durability of the support structure and extend its service life.

[0055] Please refer to the above working process Figures 1 to 8 .

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0057] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The assembled support construction device for the local deepening part in the foundation pit is characterized by: include: A foundation pit body (1), wherein the inner wall of the foundation pit body (1) is provided with a side wall plate 1 (11), the side of the side wall plate 1 (11) is provided with a side wall plate 2 (12), a connecting component assembly (2) is provided at the connection between the side wall plate 1 (11) and the side wall plate 2 (12), and a supporting assembly (4) is provided at the bottom end of the inner wall of the side wall plate 1 (11).

2. The assembled support construction device for local deepening of foundation pit according to claim 1 is characterized in that: The connector assembly (2) comprises a connecting plate 1 (21), the outer surface of the connecting plate 1 (21) is hingedly connected to a connecting plate 2 (22), a rubber airbag is provided at the axial gap between the connecting plate 1 (21) and the connecting plate 2 (22), a curved plate 1 (23) is fixedly connected to a surface of the connecting plate 1 (21) close to the connecting plate 2 (22), a curved plate 2 (24) is fixedly connected to a surface of the connecting plate 1 (21) close to the connecting plate 2 (22), and a sliding groove is provided on the outer surface of the curved plate 2 (24).

3. The assembled support construction device for local deepening of foundation pit according to claim 2 is characterized in that: A telescopic rod (25) is rotatably connected between the connecting plate (21) and the arc plate (24); a protective assembly (3) is provided on the outer surfaces of the arc plate (23) and the arc plate (24); the protective assembly (3) comprises a protective cover (31); the protective cover (31) is fixedly connected to a side of the arc plate (23) away from the arc plate (24); a bolt body (32) is slidably connected inside a slide groove provided in the arc plate (24); and the end of the bolt body (32) away from the arc plate (23) is fixedly connected to the protective cover (33).

4. The assembled support construction device for local deepening of foundation pit according to claim 3 is characterized in that: The inner wall of the protective cover 1 (31) is provided with a contact point, and both sides of the inner wall of the protective cover 1 (31) are fixedly connected with telescopic rods 2 (34), and one end of the telescopic rod 2 (34) away from the protective cover 1 (31) is fixedly connected with an auxiliary plate 1 (35), and a side of the auxiliary plate 1 (35) away from the telescopic rod 2 (34) is rotatably connected to two arc blocks 1 (36), and a side of the arc block 1 (36) away from the auxiliary plate 1 (35) is rotatably connected to two arc blocks 2 (37).

5. The assembled support construction device for local deepening of foundation pit according to claim 4 is characterized in that: The telescopic rod 1 (25) is electrically connected to the rubber airbag and controls the air intake and exhaust of the rubber airbag. The telescopic rod 2 (34) is electrically connected to the contact.

6. The assembled support construction device for local deepening of foundation pit according to claim 1 is characterized in that: The support assembly (4) comprises a telescopic rod three (41), and the telescopic rod three (41) is rotatably connected to the bottom end of the inner wall of the side wall plate one (11), and one end of the telescopic rod three (41) away from the side wall plate one (11) is rotatably connected to a connecting block (43), and the bottom end of the side wall plate one (11) is rotatably connected to a Y-shaped auxiliary plate (42), and the telescopic rod three (41) is located above the Y-shaped auxiliary plate (42).

7. The assembled support construction device for local deepening of foundation pit according to claim 6 is characterized in that: The side wall plate one (11) is provided with a dual-axis inclinometer, one end of the Y-shaped auxiliary plate (42) away from the side wall plate one (11) is rotatably connected to the connecting block (43), the bottom end of the connecting block (43) is fixedly connected to a supporting circular plate (44), and the bottom surface of the supporting circular plate (44) is provided with a conical protrusion, a telescopic plate (45) is fixedly connected between the connecting block (43) and the supporting circular plate (44), and the dual-axis inclinometer is electrically connected to the telescopic rod three (41), and the supporting circular plate (44) is provided with a pressure sensor, and the pressure sensor is electrically connected to the telescopic plate (45).

8. A method for constructing a prefabricated support for a local deepening portion of a foundation pit, applied to the prefabricated support construction device for a local deepening portion of a foundation pit as described in claims 1 to 7, characterized in that: Support construction methods include: Step 1: During construction, the GRC cement board prefabricated foundation pit side wall plate is directly hoisted into the foundation pit body (1) by a crane, and fixed to form the underground pit side wall by pre-installed special connectors; Step 2: Since there is an axial gap between the connecting plate 1 (21) and the connecting plate 2 (22), and a rubber airbag is provided in the axial gap between the connecting plate 1 (21) and the arc-shaped plate 1 (23), when the telescopic rod 1 (25) is extended or retracted, the connecting plate 1 (21) and the connecting plate 2 (22) can be driven to fit more closely to the inner wall of the foundation pit body (1), and after the installation is completed, the rubber airbag is filled with air to fill the axial gap; Step 3: When the angle of the connecting plate 1 (21) and the connecting plate 2 (22) is fixed by the bolt body (32), the arc block 1 (36) and the arc block 2 (37) are driven to adaptively clamp the bolt body (32) by extending the telescopic rod 2 (34), thereby ensuring that the connecting plate 1 (21) and the connecting plate 2 (22) maintain a stable angle during the force-bearing process.

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