Supporting device suitable for local soil retaining and supporting method thereof

Abstract

The device comprises a first supporting plate, one end of the first supporting plate is rotationally connected with a second supporting plate, an adjusting mechanism is arranged between the wall faces of the two supporting plates, and a limiting mechanism is arranged in the middle of the adjusting mechanism; the first adjusting rod and the second adjusting rod are rotationally connected to the wall faces of the two supporting plates, the auxiliary assembly and the pulling assembly are fixed to the ends of the adjusting rods, the pulling assembly comprises a limiting rod and a pull rod fixed to the periphery of the limiting rod, the auxiliary assembly comprises a limiting wheel provided with a plurality of limiting grooves, and the limiting rod is separated from the limiting grooves by pulling the pull rod; the included angle of the supporting plate is adjusted by adjusting the position between the first adjusting rod and the second adjusting rod, limitation on the pull rod is relieved, the limiting rod is inserted into the corresponding limiting groove, the adjusted or folded device is fixed, flexible adjustment and reliable locking of the angle of the supporting device are achieved, and the supporting device is convenient to use. The applicability of the device is improved, and the stability of the folded state of the device can be guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of foundation pit support, and more specifically, relates to a support device suitable for local retaining and a support method thereof. Background Art

[0002] In geotechnical engineering and foundation pit construction, local retaining support is a crucial technical measure to ensure construction safety and prevent slope instability and soil collapse. In particular, in projects such as urban underground space development, road slope regulation, and pipeline trench excavation, temporary support for loose or unstable soil in localized areas is often necessary to ensure the safety of construction personnel and equipment, and to prevent surface subsidence or damage to surrounding buildings caused by soil displacement. In such scenarios, traditional retaining support methods often rely on rigid support structures such as steel pipe bracing, steel sheet pile support, or anchor bolts. However, these traditional support methods often suffer from complex installation, long construction cycles, and inconvenient disassembly. Furthermore, their effectiveness is highly dependent on ground conditions and anchoring quality. For example, in soft soil or environments with active groundwater, anchor bolts cannot maintain sufficient anchoring force, resulting in insufficient support system stability. Furthermore, large support equipment is difficult to deploy in confined working spaces, limiting construction efficiency. In recent years, with the continuous advancement of support technology, relevant studies have proposed foldable support structures, but there are the following problems: 1. The deployment angle of the device cannot be adjusted, making it difficult to adapt to different application scenarios; 2. The folded device cannot be fixed, and the device may unfold during movement and transportation, posing a safety hazard. Summary of the Invention

[0003] In response to the above defects or improvement needs of the prior art, the present invention provides a support device and a support method suitable for local soil retaining. Through the rotational connection between the first support plate and the second support plate, combined with the plug-in cooperation of the limiting rod and different limiting grooves in the adjustment mechanism, flexible adjustment and reliable locking of the angle of the support device are achieved, and after the device is folded, it can also be restricted by the limiting rod and the limiting groove to avoid accidental unfolding of the first support plate and the second support plate after folding, thereby improving the applicability of the device and ensuring the stability of the folded state of the device.

[0004] According to one aspect of the present invention, the present invention provides a support device suitable for local retaining, comprising a first support plate, one end of which is rotatably connected to a second support plate, an adjustment mechanism is provided between the wall surfaces of the first support plate and the second support plate, and a limiting mechanism is provided in the middle position of the adjustment mechanism, wherein: The adjustment mechanism includes a first adjustment rod rotatably connected to the wall surface of the first support plate, a second adjustment rod rotatably connected to the wall surface of the second support plate, an auxiliary component fixed to the end of the first adjustment rod, and a pulling component fixed to the end of the second adjustment rod; the first adjustment rod and the second adjustment rod are connected by the auxiliary component and the pulling component, and the relative position between the two rods is adjusted with the cooperation of the limiting mechanism, thereby adjusting the angle between the first support plate and the second support plate.

[0005] Furthermore, the pulling assembly includes a fixed shell fixed at the end of the second adjusting rod away from the second support plate, two rotating blocks are fixed on both sides of the end of the fixed shell away from the second adjusting rod, and a limiting rod that can slide inside the fixed shell is provided in the middle, and the limiting rod is fixedly connected to a limiting spring at one end located inside the fixed shell, and the limiting spring is fixedly connected to the inner wall of the fixed shell at one end away from the limiting rod.

[0006] Furthermore, a pull rod is fixedly connected to the circumferential outer wall of the limiting rod, and the pull rod is slidably connected to the inner wall of the fixed shell and extends to the outside of the fixed shell.

[0007] Furthermore, the auxiliary component includes a fixed shaft with both ends fixed on the inner walls of both sides of the first adjusting rod, and a limiting wheel is fixedly connected to the outer wall of the fixed shaft near the middle position, and the limiting wheel is provided with a plurality of limiting grooves for inserting the limiting rod.

[0008] Furthermore, the two ends of the outer circumferential wall of the fixed shaft are rotatably connected to the two rotating blocks.

[0009] Furthermore, the limiting mechanism includes a supporting shell fixed to the outer wall of the fixed shell, a limiting block slidably connected to the inner wall of the supporting shell, and a sliding rod passing through the interior of the supporting shell.

[0010] Furthermore, one end of the sliding rod located inside the supporting shell is fixedly connected to the outer wall of the limiting block, and the other end away from the limiting block is fixedly connected to a pull ring.

[0011] Furthermore, it also includes a plurality of fixed cones fixed on the bottom of the first support plate.

[0012] Furthermore, it also includes a fixed handle fixedly connected to the first support plate and the second support plate on sides away from each other.

[0013] According to another aspect of the present invention, a support method for local retaining walls is provided, which is implemented using the support device for local retaining walls as described above, and includes the following specific steps: S100: transporting the folded support device to the work site, and placing the support device on the ground at a predetermined position using a fixed handle, inserting multiple fixing cones at the bottom of the first support plate into the ground to fix the device; S200: Pulling the pull ring on the limiting mechanism drives the sliding rod to slide inside the support shell, thereby driving the limiting block to retract into the support shell; pulling the rod past the position of the limiting block, then releasing the pull ring to extend the limiting block, restricting the position of the rod, so that the limiting rod is disengaged from the limiting groove, thereby opening the first support plate and the second support plate; S300: Keeping the limiting rod out of the limiting groove, the rotating block is rotated and adjusted relative to the fixed axis, so that the position between the first adjustment rod and the second adjustment rod changes accordingly, thereby adjusting the angle between the first support plate and the second support plate, and finally fitting the second support plate to the slope to be supported; S400: Pull the pull ring, and the pull rod pushes the limiting rod under the elastic force of the limiting spring to automatically insert into the corresponding limiting groove, thereby fixing the adjusted angle and forming a stable retaining support structure; S500: After the operation is completed, step S200 is repeated to release the restriction of the restraining mechanism on the pull rod, so that the restraining rod remains out of the restraining groove. The rotating block is rotated and adjusted relative to the fixed axis to gradually reduce the angle between the first support plate and the second support plate until the device is folded. The pull ring is pulled, and the pull rod rebounds and pushes the restraining rod into the restraining groove corresponding to the folded state, thereby fixing the folded device. S600: Pull the fixed cone out of the ground to complete the folding of the support device, and carry the support device by the fixed handle to the next area that needs support.

[0014] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art: 1. The support device suitable for local soil retaining of the present invention is realized by the rotation connection between the first support plate and the second support plate, and combined with the plug-in cooperation of the limiting rod and different limiting grooves in the adjustment mechanism, the flexible adjustment and reliable locking of the support device angle are realized, thereby avoiding the problems of relying on the rock and soil anchoring effect of traditional anchor rod assemblies, resulting in complex construction and stability being restricted by rock and soil conditions, and the traditional soil retaining support device having a fixed angle, which is difficult to adapt to scenarios with different terrains and soil retaining requirements. The device of the present invention realizes adjustable support angle, controllable stability and reduces dependence on rock and soil, and can adapt to a variety of different application scenarios, such as slope retaining with different slopes, foundation pit support of different shapes, etc., which greatly improves the versatility and practicality of the device.

[0015] 2. The supporting device for local retaining of the present invention is rotatably connected to the second supporting plate at one end of the first supporting plate, which is adjusted to a folded state through an adjusting mechanism and the limiting rod is inserted into the limiting groove through cooperation with the limiting mechanism, thereby avoiding accidental unfolding of the device after folding, reducing the size of the device for easy carrying and transportation, and ensuring the stability of the device after folding, thereby improving safety.

[0016] 3. The support device suitable for local retaining walls of the present invention adopts an elastic mechanical locking structure (limiting rod + limiting groove + spring), which compensates for installation deviations through the elastic deformation of the spring to achieve adaptive locking. The elastic deformation of the spring can absorb dimensional errors and avoid the adaptability problems of traditional rigid plug-in. Even if the side walls of the foundation pit are uneven or there is local deformation, the limiting rod and the limiting groove can still be closely matched. The elastic locking mechanism reduces the risk of loosening and ensures the overall stability of the support structure, thereby reducing dependence on processing accuracy, improving assembly reliability and the long-term stability of the support structure.

[0017] 4. The support device suitable for local retaining walls of the present invention is inserted into the ground through a bottom fixed cone to enhance the anchoring force, and is combined with a mechanical locking structure support plate to expand the contact surface and achieve rigid locking, effectively adapting to different stratum pressures, maintaining the stability of the support structure, and solving the problems of slippage or hinge point damage caused by unclear contact pressure in traditional inclined supports, thereby significantly improving the safety and anti-destruction ability of the overall support system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a supporting device suitable for local retaining walls according to an embodiment of the present invention; Figure 2 It is a schematic diagram of a partially enlarged structure of a supporting device suitable for local retaining according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic structural diagram of an adjustment mechanism of a support device applicable to local retaining walls according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of a fixed shell of a supporting device suitable for local retaining walls according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of a support shell of a support device suitable for local retaining walls according to an embodiment of the present invention; Figure 6 This is a working state diagram of a supporting device for local retaining in a foundation pit slope according to an embodiment of the present invention; Figure 7 This is a flow chart of a support method for a support device suitable for local retaining walls according to an embodiment of the present invention.

[0020] In all the drawings, the same figure marks represent the same technical features, specifically: 1-first support plate, 2-second support plate, 3-fixed handle, 4-fixed cone, 5-adjustment mechanism, 51-first adjusting rod, 52-second adjusting rod, 53-pulling assembly, 531-fixed shell, 532-rotating block, 533-limiting rod, 534-limiting spring, 535-pull rod, 54-auxiliary assembly, 541-fixed shaft, 542-limiting wheel, 543-limiting groove, 6-limiting mechanism, 61-support shell, 62-limiting block, 63-sliding rod, 64-pull ring, 65-reset spring. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, inside, outside, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] In the present invention, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0025] Example 1 like Figure 1-2 As shown, an embodiment of the present invention provides a support device suitable for local soil retaining, including a first support plate 1, a second support plate 2, a fixed handle 3, a fixed cone 4, an adjustment mechanism 5 and a limiting mechanism 6, one end of the first support plate 1 is rotatably connected to the second support plate 2, the first support plate 1 and the second support plate 2 are fixedly connected to the fixed handle 3 on the side away from each other, a plurality of the fixed cones 4 are fixedly connected to the bottom of the first support plate 1, the adjustment mechanism 5 is provided between the panels of the first support plate 1 and the second support plate 2, and the limiting mechanism 6 is provided on the adjustment mechanism 5; the opening and closing degree between the first support plate 1 and the second support plate 2 is adjusted by the adjustment mechanism 5, thereby adjusting the angle between the two to adapt to a variety of adaptation scenarios, and the limiting mechanism 6 is used to limit the adjustment mechanism 5 after adjusting to a suitable angle to prevent the first support plate 1 and the second support plate 2 from accidentally unfolding, thereby improving the stability of the device, wherein, like Figure 3-4 As shown, the adjustment mechanism 5 includes a first adjustment rod 51, a second adjustment rod 52, a pulling assembly 53, and an auxiliary assembly 54. The first adjustment rod 51 is rotatably connected to the wall surface of the first support plate 1, and the second adjustment rod 52 is rotatably connected to the wall surface of the second support plate 2. The auxiliary assembly 54 is fixed to the end of the first adjustment rod 51 away from the first support plate 1, and the pulling assembly 53 is fixed to the end of the second adjustment rod 52 away from the second support plate 2. The first adjustment rod 51 and the second adjustment rod 52 are connected by the auxiliary assembly 54 and the pulling assembly 53 to adjust the relative position between the two rods. Specifically, The pulling assembly 53 includes a fixed shell 531, a rotating block 532, a limiting rod 533, a limiting spring 534 and a pulling rod 535, and the end of the second adjusting rod 52 away from the second supporting plate 2 is fixedly connected to the fixed shell 531, and the two rotating blocks 532 are fixedly connected to the two side edges of the end of the fixed shell 531 away from the second adjusting rod 52, and the limiting rod 533 is arranged in the middle. The limiting rod 533 can slide inside the fixed shell 531, and the limiting rod 533 is fixedly connected to the limiting spring 534 at one end inside the fixed shell 531. The limiting spring 15 is always in a compressed state in the device. The limiting spring 534 is fixedly connected to the inner wall of the fixed shell 531 at one end away from the limiting rod 533, and the circumferential outer wall of the limiting rod 533 is fixedly connected to the pulling rod 535. The pulling rod 535 is slidably connected to the inner wall of the fixed shell 531 and extends to the outside of the fixed shell 531. It can move along the inner wall of the fixed shell 531 under the action of external force.

[0026] The auxiliary component 54 includes a fixed shaft 541, a limiting wheel 542 and a limiting groove 543. The inner walls on both sides of the first adjusting rod 51 are fixedly connected to the fixed shaft 541, and the circumferential outer wall of the fixed shaft 541 is fixedly connected to the limiting wheel 542 near the middle position, and the two ends of the circumferential outer wall are rotatably connected to the two rotating blocks 532; a plurality of limiting grooves 543 are opened on the limiting wheel 542, and the limiting rod 533 is inserted into different limiting grooves 543. The cooperation between the limiting groove 12 and the limiting rod 14 can limit the rotation angle between the first adjusting rod 51 and the second adjusting rod 52, and thus can adjust the angle between the first support plate 1 and the second support plate 2 to adapt to different application scenarios, and limit the first support plate 1 and the second support plate 2 after folding to ensure the stability between the first support plate 1 and the second support plate 2 after folding.

[0027] During use, pulling the pull rod 535 can make the limiting rod 533 disengage from the limiting groove 543. During this process, the limiting spring 534 is compressed under force. At this time, the rotating block 532 is appropriately rotated and adjusted relative to the fixed shaft 541, thereby changing the position between the first adjusting rod 51 and the second adjusting rod 52, and at the same time, changing the angle between the first support plate 1 and the second support plate 2. After the position is adjusted to an appropriate degree, the restriction on the pull rod 535 can be released, and then under the action of the elastic force of the limiting spring 534, the limiting rod 533 is inserted into the corresponding limiting groove 543 again. During this process, according to the degree of adjustment of the angle between the first support plate 1 and the second support plate 2, the device can be applied to a variety of usage scenarios or the first support plate 1 and the second support plate 2 can be folded.

[0028] like Figure 5 As shown, the limiting mechanism 6 includes a support shell 61, a limiting block 62, a sliding rod 63, a pull ring 64 and a return spring 65. The outer wall of the fixed shell 531 is fixedly connected to the support shell 61, and the inner wall of the support shell 61 is slidably connected to the limiting block 62 for blocking the pull rod 535. The sliding rod 63 passes through the inside of the support shell 61 and can slide inside the fixed shell 531. The end of the sliding rod 63 located inside the support shell 61 is fixedly connected to the outer wall of the limiting block 62, and the end of the sliding rod 63 away from the limiting block 62 is fixedly connected to the pull ring 64. The pull ring 64 facilitates the operator to pull the sliding rod 63; the outer periphery of the sliding rod 63 and the inner periphery of the support shell 61 are provided with the return spring 65, and the two ends of the return spring 65 are respectively fixedly connected to the outer wall of the limiting block 62 and the inner wall of the support shell 61.

[0029] When in use, pulling the pull ring 64 can drive the limiting block 62 to move into the support shell 61, so that the pull rod 535 can pass through the limiting block 62 when sliding inside the fixed shell 535, and then release the pull ring 64. Under the action of the elastic force of the return spring 65, the limiting block 62 extends a certain distance, thereby limiting the position of the pull rod 535, so that the limiting rod 533 remains out of the limiting groove 543, and then the operator can release the restrictions between the two groups of first adjustment rods 51 and second adjustment rods 52 one by one, and then adjust the angle between the first support plate 1 and the second support plate 2, and then pull the pull ring 64 one by one, so that the pull rod 535 returns to its original position under the action of the elastic force of the limiting spring 534, completing the restriction between the first adjustment rod 51 and the second adjustment rod 52.

[0030] Example 2 like Figure 7 As shown, based on the above-mentioned supporting device suitable for local retaining, an embodiment of the present invention provides a supporting method suitable for local retaining. S100: transporting the folded support device to the work site, and placing the support device on the ground at a predetermined position using the fixed handle 3, inserting the multiple fixing cones 4 at the bottom of the first support plate 1 into the ground to fix the device; S200: Pull the pull ring 64 on the limiting mechanism 6 to drive the sliding rod 63 to slide inside the support shell 61, thereby driving the limiting block 62 to retract into the support shell 61; pull the pull rod 535, the limiting spring 534 is compressed, and the pull rod 535 passes the position of the limiting block 62, then release the pull ring 64, and the limiting block 62 extends under the elastic force of the return spring 65, thereby limiting the position of the pull rod 535, so that the limiting rod 533 disengages from the limiting groove 543, thereby opening the first support plate 1 and the second support plate 2; S300: Keeping the limiting rod 533 out of the limiting groove 543, the rotating block 532 is appropriately rotated and adjusted relative to the fixed shaft 541, so that the position between the first adjusting rod 51 and the second adjusting rod 52 changes accordingly, thereby adjusting the angle between the first support plate 1 and the second support plate 2, and finally making the second support plate 2 fit the slope to be supported; S400: When the angle between the first support plate 1 and the second support plate 2 is adjusted to a suitable degree, the pull ring 64 is pulled to remove the restriction on the pull rod 535. The pull rod 535 rebounds under the elastic force of the restriction spring 534, pushing the restriction rod 533 to automatically insert into the corresponding restriction groove 543, thereby fixing the adjusted angle and forming a stable retaining support structure. The pull ring 64 is released to restrict the position of the pull rod 535 to prevent the pull rod 535 from being accidentally pulled during the use of the device, causing the restriction rod 533 to disengage from the restriction groove 543; Figure 6 Schematic diagram of the support status in the foundation pit; S500: After the operation is completed, step S200 is repeated to release the restriction of the limiting mechanism 6 on the pull rod 535, so that the limiting rod 533 remains in a state of being separated from the limiting groove 543, and the rotating block 532 is rotated and adjusted relative to the fixed axis 541 to gradually reduce the angle between the first support plate 1 and the second support plate 2 until the device is folded to a suitable state. The pull ring 64 is pulled to release the pull rod 535, so that the limiting rod 533 is inserted into the limiting groove 543 corresponding to the folded state, thereby fixing the folded device; S600: Pull out the fixed cone 4 from the ground to complete the folding of the support device, carry the support device through the fixed handle 3, transfer it to the next area that needs support, and reuse it.

[0031] The device in the above embodiment can disengage the limiting rod from the limiting groove by pulling the pull rod, thereby allowing the rotating block to be appropriately rotated and adjusted relative to the fixed axis, thereby causing the position between the first adjustment rod and the second adjustment rod to change accordingly, and after the position is adjusted to an appropriate degree, the restriction on the pull rod can be released, thereby allowing the limiting rod to be inserted into the corresponding limiting groove again, so that after the device is folded, the first adjustment rod and the second adjustment rod are restricted by the limiting rod and the limiting groove, thereby avoiding the situation where the first support plate and the second support plate are accidentally unfolded after being folded, thereby improving the stability of the device after folding, and by inserting the limiting rod into different limiting grooves, the angle between the first support plate and the second support plate can be adjusted, thereby adapting to a variety of usage scenarios, improving the scope of application of the device, and thereby improving the practicality of the device. The device of the present invention has a simple structure, is easy to operate, and improves the adaptability, stability, and safety of the support structure.

[0032] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A support device suitable for local retaining, characterized in that: It comprises a first support plate (1), one end of which is rotatably connected to a second support plate (2), an adjustment mechanism (5) is provided between the walls of the first support plate (1) and the second support plate (2), and a limiting mechanism (6) is provided in the middle of the adjustment mechanism (5), wherein: The adjustment mechanism (5) comprises a first adjustment rod (51) rotatably connected to the wall surface of the first support plate (1), a second adjustment rod (52) rotatably connected to the wall surface of the second support plate (2), an auxiliary component (54) fixed to the end of the first adjustment rod (51), and a pulling component (53) fixed to the end of the second adjustment rod (52); the first adjustment rod (51) and the second adjustment rod (52) are connected by the auxiliary component (54) and the pulling component (53), and the relative position between the two rods is adjusted under the cooperation of the limiting mechanism (6), thereby adjusting the angle between the first support plate (1) and the second support plate (2).

2. A supporting device suitable for local retaining according to claim 1, characterized in that: The pulling assembly (53) includes a fixed shell (531) fixed to one end of the second adjusting rod (52) away from the second support plate (2), two rotating blocks (532) are fixed on both sides of the end of the fixed shell (531) away from the second adjusting rod (52), and a limiting rod (533) that can slide inside the fixed shell (531) is provided in the middle, and a limiting spring (534) is fixedly connected to one end of the limiting rod (533) located inside the fixed shell (531), and the limiting spring (534) is fixedly connected to the inner wall of the fixed shell (531) at one end away from the limiting rod (533).

3. A supporting device suitable for local retaining according to claim 2, characterized in that: A pull rod (535) is fixedly connected to the circumferential outer wall of the limiting rod (533), and the pull rod (535) is slidably connected to the inner wall of the fixed shell (531) and extends to the outside of the fixed shell (531).

4. A support device suitable for local retaining according to any one of claims 1 to 3, characterized in that: The auxiliary component (54) comprises a fixed shaft (541) whose two ends are fixed to the inner walls of both sides of the first adjusting rod (51), a limiting wheel (542) is fixedly connected to the outer wall of the circumference of the fixed shaft (541) and located near the middle, and a plurality of limiting grooves (543) for inserting the limiting rods (533) are formed on the limiting wheel (542).

5. A supporting device suitable for local retaining according to claim 4, characterized in that: The two ends of the circumferential outer wall of the fixed shaft (541) are rotatably connected to the two rotating blocks (532).

6. A supporting device suitable for local retaining according to any one of claims 1 to 3, characterized in that: The limiting mechanism (6) comprises a supporting shell (61) fixed to the outer wall of the fixed shell (531), a limiting block (62) slidably connected to the inner wall of the supporting shell (61), and a sliding rod (63) passing through the interior of the supporting shell (61).

7. A supporting device suitable for local retaining according to claim 6, characterized in that: One end of the sliding rod (63) located inside the support shell (61) is fixedly connected to the outer wall of the limiting block (62), and the other end away from the limiting block (62) is fixedly connected to a pull ring (64).

8. The supporting device suitable for local retaining according to claim 1, characterized in that: It also includes a plurality of fixed cones (4) fixed to the bottom of the first support plate (1).

9. The supporting device suitable for local retaining according to claim 1, characterized in that: It also includes a fixed handle (3) fixedly connected to the first support plate (1) and the second support plate (2) on the sides away from each other.

10. A supporting method for local retaining, implemented by a supporting device for local retaining according to any one of claims 1 to 9, characterized in that: The specific steps include: S100: transporting the folded support device to the work site, and placing the support device on the ground at a predetermined position using a fixed handle, inserting a plurality of fixed cones (4) at the bottom of the first support plate (1) into the ground to fix the device; S200: Pull the pull ring (64) on the limiting mechanism (6) to drive the sliding rod (63) to slide inside the support shell (61), thereby driving the limiting block (62) to retract into the support shell (61); pull the pull rod (535) to pass the position of the limiting block (62), and then release the pull ring (64) to extend the limiting block (62), thereby limiting the position of the pull rod (62) and making the limiting rod (533) disengage from the limiting groove (543), thereby opening the first support plate (1) and the second support plate (2); S300: Keeping the limiting rod (533) out of the limiting groove (543), the rotating block (532) is rotated and adjusted relative to the fixed shaft (541), so that the position between the first adjusting rod (51) and the second adjusting rod (52) changes accordingly, thereby adjusting the angle between the first support plate (1) and the second support plate (2), and finally fitting the second support plate (2) to the slope surface to be supported; S400: Pull the pull ring (64), and the pull rod (64) pushes the limiting rod (533) under the elastic force of the limiting spring (534) to automatically insert into the corresponding limiting groove (543), thereby fixing the adjusted angle and forming a stable retaining support structure; S500: After the operation is completed, repeat step S200, release the restriction of the limiting mechanism (6) on the pull rod (535), so that the limiting rod (533) remains in a state of being out of the limiting groove (543), (532) is rotated and adjusted relative to the fixed axis (541), and the angle between the first support plate (1) and the second support plate (2) is gradually reduced until the device is folded, and the pull ring (64) is pulled, and the pull rod (64) rebounds and pushes the limiting rod (533) into the limiting groove (543) corresponding to the folded state, thereby fixing the folded device; S600: Pull out the fixed cone (4) from the ground to complete the folding of the support device, and carry the support device through the fixed handle (3) to transfer it to the next area that needs support.

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