Method of rapid support in bulk material

Abstract

The present application relates to a kind of method for quick support in bulk layer, to solve the construction method of existing support, it is difficult to ensure the accurate alignment of screw hole when connecting adjacent support plate body, resulting in the problem of slow construction progress, comprising: S1, pre-positioning: using bolt to pre-connect each support plate body, and adjacent support plate body is also achieved by rotating connecting piece Rotating connection;S2, remove screw connection;S3, erect support: excavate upper and lower bench face, and support plate body is used to support surrounding rock.The present application simultaneously uses screw connection and rotating connection between adjacent support plate body, the pre-positioning of screw hole between adjacent support plate body is realized by first screwing, after removing screw connection, adjacent support plate body is still connected by rotating connecting piece, and due to the existence of pre-positioning operation, when rotating support plate body, its screw hole can be accurately aligned with the screw hole of top support plate body, speed up construction progress, surrounding rock is supported in time.

Description

Technical Field

[0001] This invention relates to the field of tunnel support, and more specifically, to a method for rapid support in loosely packed layers. Background Technology

[0002] In tunnel construction, operations in shallowly buried loose rock formations are relatively challenging. The surrounding rock has a loose structure with irregular internal composition, poor mechanical properties and stability, and is easily affected by excavation disturbances. This can lead to large-scale arch collapses during construction, impacting tunnel safety. To prevent arch settlement and collapse, support plates are often used to reinforce and support the surrounding rock.

[0003] Support plates are often constructed by bolting together multiple support plates. However, due to limitations in tunnel construction sites and equipment, it is difficult to precisely align the bolt holes of adjacent support plates. For example, during the connection of adjacent support plates, a complete row of bolting operations is required. If any one of them deviates, subsequent bolts may be unable to be installed. Similarly, lifting the support plates to the upper part of the tunnel is difficult to do precisely, resulting in misalignment between the bolt holes and those of adjacent support plates. Regardless of the factors affecting the alignment of bolt holes of adjacent support plates, it will seriously impact the project progress and the timely support of the surrounding rock. In loose rock formations, the tendency for deformation of the surrounding rock increases before the support is erected. Summary of the Invention

[0004] The purpose of this invention is to provide a method for rapid support in loosely packed layers, which solves the problem that existing support construction methods are difficult to ensure the precise alignment of bolt holes when connecting adjacent support plates, resulting in slow construction progress and failure to provide timely support for the surrounding rock.

[0005] The embodiments of the present invention are achieved through the following technical solutions: A method for rapid support in loosely packed layers includes: S1. Pre-positioning: Before excavation, bolts are used to pre-connect each support plate on the ground, and adjacent support plates are also rotatably connected by rotatable connectors. S2. Loosen the bolts: Remove the bolts used to connect adjacent support plates; S3. Erecting support: Excavate the upper and lower bench faces in sequence, and use support plates to support the surrounding rock. During the support process, use bolts to connect adjacent support plates again.

[0006] Preferably, S1 includes: dividing a plurality of support plates into an upper arch group and a temporary invert arch group. The upper arch group is used to support the top and side walls of the tunnel when excavating the upper bench. The temporary invert arch group is used as a temporary invert arch for the bottom wall of the tunnel when excavating the working face of the upper bench. After the support plates in the upper arch group are pre-positioned, they are pre-positioned with the support plates in the temporary invert arch group. No pre-positioning operation is performed between the two support plates located in the middle of the temporary invert arch group.

[0007] Preferably, the support plate in the temporary invert arch group and the support plate in the upper arch group are connected secondary by a reinforcing plate.

[0008] Preferably, the number of support plates in the upper arch assembly is odd.

[0009] Preferably, S3 includes: when excavating the lower bench face, rotating the support plate of the temporary invert arch group to the tunnel sidewall as a side support to support the surrounding rock of the sidewall.

[0010] Preferably, it also includes: S4, constructing a lower arch, with both ends of the lower arch connected to the side supports on the left and right sides of the tunnel, respectively.

[0011] Preferably, the rotating connector includes: a first blade with a first screw hole; an blade shaft, the first blade being rotatably connected to the blade shaft; and a second blade, the second blade being rotatably connected to the blade shaft, the second blade including: a second transition section, one end of the second transition section being rotatably connected to the blade shaft; and a second connecting section, the other end of the second transition section being connected to the second connecting section, the angle between the axis of the second transition section along its length and the axis of the second connecting section along its length being less than 180 degrees.

[0012] Preferably, the first blade includes: a first transition section, one end of which is rotatably connected to the blade shaft; and a first connecting section, the other end of which is connected to the first connecting section, wherein the angle between the axis of the first transition section along its length and the axis of the first connecting section along its length is less than 180 degrees, and the first connecting section is provided with the first screw hole.

[0013] Preferably, the reinforcing plate is provided with a second screw hole and a third screw hole with mutually perpendicular axes. The reinforcing plate can be screwed to the upper arch assembly through the second screw hole, and the reinforcing plate can be screwed to the first blade and the temporary inverted arch assembly in sequence through the third screw hole.

[0014] Preferably, the rotating connector further includes a reinforcing rib, and the second transition section and the second connecting section are connected by the reinforcing rib.

[0015] The present invention has at least the following beneficial effects: This invention pre-positions the support plates before tunnel excavation. Adjacent support plates are connected by both bolted and rotatable connections. The first bolting connection pre-positions the bolt holes of adjacent support plates. After the bolting is released, adjacent support plates remain connected by rotatable connectors. After excavation, the support plate installed at the center of the tunnel top is lifted to the corresponding position and fixed. The adjacent support plates connected to it by the rotatable connectors can reach the pre-position by rotation. Due to the pre-positioning operation, after rotating the support plate, its bolt holes are precisely aligned with the bolt holes of the top support plate, which speeds up the installation of tunnel support and reduces the possibility and degree of deformation of the surrounding rock in loose deposit environments before support installation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the support structure during the excavation of the upper step; Figure 2 A schematic diagram illustrating the conversion from temporary support to lateral support; Figure 3 A schematic diagram of the overall support structure; Figure 4 A schematic diagram of the support plate body after pre-positioning and connection; Figure 5 This is a structural diagram of the support plate during transportation. Figure 6 Schematic diagram a shows the connection between the rotating connector and the support plate. Figure 7 Schematic diagram b shows the connection between the rotating connector and the support plate. Figure 8 Schematic diagram a shows the connection between the rotating connector and the overlapping plate; Figure 9 Schematic diagram b shows the connection between the rotating connector and the overlapping plate; Figure 10 Schematic diagram c shows the connection between the rotating connector and the overlapping plate; Figure 11 d is a schematic diagram of the connection between the rotating connector and the overlapping plate; Figure 12 Schematic diagram a of the rotating connector and the overlapping plate after the improvement of the first blade; Figure 13Schematic diagram b showing the rotating connector and overlapping plate after the improvement of the first blade; Figure 14 Diagram a showing the connection of the reinforcing plates; Figure 15 Diagram b shows the connection of the reinforcing plate; Icons: 1-Support plate body, 11-Plate body, 12-Overlap plate, 2-Rotating connector, 21-First blade, 211-First transition section, 212-First connecting section, 2121-First bolt hole, 22-Blade shaft, 23-Second blade, 231-Second transition section, 232-Second connecting section, 24-Reinforcing rib, 3-Upper arch assembly, 4-Temporary invert arch assembly, 5-Reinforcing plate, 51-Second bolt hole, 52-Third bolt hole, 6-Lower arch, 8-Side support, 9-Anchor bolt. Detailed Implementation

[0018] To make the objectives, methods, and advantages of the embodiments of the present invention clearer, the method solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Example 1 A method for rapid support in loosely packed layers includes: S1. Pre-positioning: Before excavation, bolts are used to pre-connect each support plate 1 on the ground, and adjacent support plates 1 are also rotatably connected by rotatable connectors 2; support plates 1 can be made of steel plates.

[0020] S2. Loosen the bolts: Remove the bolts used to connect the adjacent support plate 1; S3. Erecting support: Excavate the upper and lower bench faces in sequence, and use support plates 1 to support the surrounding rock. During the support process, use bolts to connect adjacent support plates 1 again.

[0021] In the specific implementation process, both bolted and rotating connections are used between adjacent support plates 1. During the first bolted connection, the bolt holes of adjacent support plates 1 are pre-positioned. After the bolted connection is released, the support plates 1 are still connected by rotating connectors 2. When the support is erected, it is only necessary to rotate the support plate 1 to achieve precise alignment of its bolt holes with the bolt holes of the adjacent support plate 1. Since the pre-positioning operation is performed before excavation, the support will not be delayed due to the pre-positioning operation after excavation. At the same time, since the precise alignment of the bolt holes is ensured, the erection speed of the support is greatly improved.

[0022] Example 2 To ensure the smooth transport of the support plate 1 into the tunnel after pre-positioning, improvements were made based on Embodiment 1. In this embodiment, S1 includes: dividing several support plates 1 into an upper arch group 3 and a temporary invert arch group 4. The upper arch group 3 is used to support the top and side walls of the tunnel when excavating the upper bench. The temporary invert arch group 4 is used as a temporary invert arch for the bottom wall of the tunnel when excavating the working face of the upper bench. After the support plate 1 in the upper arch group 3 is pre-positioned, it is pre-positioned with the support plate 1 in the temporary invert arch group 4. No pre-positioning operation is performed between the two support plates 1 located in the middle of the temporary invert arch group 4.

[0023] In the specific implementation process, such as Figure 1 As shown, the upper arch group 3 is connected to the surrounding rock of the tunnel top and side walls by anchor bolts 9, and the temporary invert arch group 4 is connected to the tunnel bottom wall. Figure 4 As shown, if during pre-positioning, each support plate 1 is connected into a ring shape via rotating connector 2, since the support plates 1 are all prefabricated according to the tunnel, the size of the ring shape is almost the same as the tunnel size, making it difficult to transport into the tunnel. In this embodiment, the connection point in the middle of the temporary invert arch assembly 4 is disconnected, as shown... Figure 5 As shown, by rotating the connector 2 and rotating each support plate 1, the space occupied by the pre-positioned support can be reduced, making it easier to transport to the tunnel. After the upper arch group 3 and the temporary invert arch group 4 are erected, the disconnected connection point in the middle of the temporary invert arch group 4 can be reconnected or left unconnected.

[0024] Example 3 In order to reduce the stress on the rotating connector 2 and avoid its damage, an improvement was made based on embodiment 2. In this embodiment, the support plate 1 in the temporary invert arch group 4 and the support plate 1 in the upper arch group 3 are connected secondary by the reinforcing plate 5.

[0025] In the specific implementation process, if as follows Figure 4 As shown, the temporary invert arch group 4 is connected to the upper arch group 3 only through the rotating connector 2. The pressure of the upper arch group 3 is directly transmitted to the temporary invert arch group 4 through the rotating connector 2. The rotating connector 2 is subjected to excessive force. Therefore, in this embodiment, a reinforcing plate 5 is added to reduce the force on the rotating connector 2.

[0026] Example 4 In order to ensure that the lifting device is subjected to uniform force, an improvement was made based on Embodiment 2. In this embodiment, the number of support plates 1 in the upper arch group 3 is odd.

[0027] In the specific implementation process, if the number of support plates 1 in the upper arch group 3 is even, then there will be two support plates 1 that are pre-connected to the middle of the tunnel top wall. When one of the support plates 1 is lifted by the lifting device, the number of support plates 1 connected to its two sides is inconsistent, and the weight of a support plate 1 may be as high as several hundred kilograms. The lifting device is prone to uneven stress and is easily damaged during long-term use. Therefore, in this embodiment, the number of support plates 1 in the upper arch group 3 is set to an odd number. At this time, there is only one support plate 1 that is pre-connected to the middle of the tunnel top wall. When this support plate 1 is lifted, the number of support plates 1 connected to its two sides is the same, and the lifting device is subjected to uniform stress.

[0028] Example 5 like Figure 6 As shown, in this embodiment, the rotating connector 2 includes: a first blade 21, the first blade 21 having a first screw hole 2121; a blade shaft 22, the first blade 21 being rotatably connected to the blade shaft 22; and a second blade 23, the second blade 23 being rotatably connected to the blade shaft 22, the second blade 23 including: a second transition section 231, one end of the second transition section 231 being rotatably connected to the blade shaft 22; and a second connecting section 232, the other end of the second transition section 231 being connected to the second connecting section 232, the angle between the axis of the second transition section 231 in the length direction and the axis of the second connecting section 232 in the length direction being less than 180 degrees.

[0029] In specific implementation, the support plate body 1 can be composed of a main plate body 11 and overlapping plates 12, with screw holes provided on the overlapping plates 12. The specifications of the support plate body 1, such as length, width, and curvature, are designed according to the tunnel conditions. First, the overlapping plates 12 of adjacent main plate bodies 11 are connected as follows... Figure 6 The pre-installation process is as shown, specifically including: connecting the overlapping plate 12 and the first blade 21 with bolts, and then connecting the second blade 23 to the overlapping plate 12. The connection between the second blade 23 and the overlapping plate 12 can be welded or screwed. To ensure the stability of the connection, welding is preferred. Then, the first blade 21 is welded to the overlapping plate 12, and the bolts are removed. At this point, the overlapping plates 12 of adjacent plate bodies 11 are rotatably connected via the blade shaft 22. All of the above operations can be performed on the ground, making the operation convenient. Finally, the support plate 1 is lifted to the top of the tunnel using a lifting device, and the support plate 1, pre-positioned at the center of the tunnel top, is fixed to the surrounding rock at the tunnel top. At this point, as... Figure 7 As shown, the overlapping plate 12 of the adjacent support plate 1 does not abut against the overlapping plate 12 of the central support plate 1 at the top of the tunnel under the action of gravity. The support plate 1 can be rotated by rotating the rotating connector so that its overlapping plate 12 is as shown. Figure 8The overlapping plate 12 of the tunnel support plate 1 shown abuts against the tunnel. Due to the previous pre-installation operation, after rotating and abutting, the screw holes of the two adjacent abutting plates and the first screw hole 2121 on the first blade 21 can be precisely aligned. At this time, bolts are used to fix the two abutting plates and the first blade 21. The operation is simple and quick.

[0030] Exemplary, such as Figure 9 As shown, the first blade 21 can also be directly fixedly connected to the overlapping plate 12, or even be integrally formed.

[0031] It should be noted that since the second blade 23 needs to come into contact with the overlapping plate 12 through rotation, in order to avoid a gap between the second connecting section 232 and the overlapping plate 12 when the second transition section 231 comes into contact with the overlapping plate 12 during the rotation process, the end of the second transition section 231 away from the first blade 21 cannot extend in the direction of the first blade 21.

[0032] If the angle between the second connecting segment 232 and the second transition segment 231 is an obtuse angle, such as Figure 7 As shown in the diagram, the shaded area (black part) represents the second transition section 231. Under the weight of the lower support plate 1, the stress is not entirely along the length of the second transition section 231, making it prone to damage. As an example, a method such as... Figure 10 The structure shown makes the angle between the second connecting segment 232 and the second transition segment 231 90 degrees. At this angle, the force on the second transition segment 231 is along its length, compared to... Figure 7 It is less prone to damage.

[0033] As an example, besides setting the angle between the second connecting segment 232 and the second transition segment 231 to 90 degrees, it can also be as follows: Figure 11 As shown, the second transition section 231 and the second connecting section 232 are connected by reinforcing rib 24, forming a more stable triangular structure compared to... Figure 7 The second transition section 231 is also not easily damaged.

[0034] Example 6 To ensure the flatness of the inner and outer walls of the support after the support plates 1 are connected, an improvement has been made based on embodiment 5. In this embodiment, the first blade 21 includes: a first transition section 211, one end of which is rotatably connected to the blade shaft 22; and a first connecting section 212, the other end of which is connected to the first connecting section 212. The angle between the axis of the first transition section 211 in the length direction and the axis of the first connecting section 212 in the length direction is less than 180 degrees. The first connecting section 212 is provided with the first screw hole 2121.

[0035] In the specific implementation process, such as Figure 1As shown, if the first blade 21 has only a horizontal section, in order to ensure the smoothness of the inner and outer surfaces of the support structure formed after the steel plates are connected, the positions of the overlapping plates 12 in adjacent steel plate assemblies are different, such as... Figure 1 As shown, when the overlapping plate 12 of the intermediate support plate 1 is set on the upper side, the overlapping plates 12 of the two side support plates 8 are set in the middle of the ends of the support plate 1. Therefore, the structures of the support plates 1 forming the support are not entirely the same, increasing the difficulty and cost of prefabricating the support plates 1. This embodiment adopts the following... Figure 12-13 After the first blade 21 structure shown, the overlapping plates 12 of adjacent support plates 1 are connected to the support plates 1 at the same position. The two adjacent support plates 1 are only inverted. Therefore, the support plates 1 that make up the support structure are completely identical, and the upper and lower surfaces of the final support structure can maintain good flatness. Maintaining flatness allows for better subsequent processes. For example, when laying waterproof membrane on the support surface composed of support plates 1, it can ensure the flatness and stability of the waterproof membrane.

[0036] The first transition section 211 and the first connecting section 212 can also be connected to each other by reinforcing ribs 24 to improve the strength of the first blade 21.

[0037] Example 7 To prevent the rotating connector 2 at the connection between the temporary invert arch assembly 4 and the upper arch assembly 3 from being damaged due to excessive force, an improvement was made based on embodiment 5, such as... Figure 14 As shown, in this embodiment, the reinforcing plate 5 is provided with a second screw hole 51 and a third screw hole 52 with mutually perpendicular axes. The reinforcing plate 5 can be screwed to the upper arch group 3 through the second screw hole 51, and the reinforcing plate 5 can be screwed to the first blade 21 and the temporary inverted arch group 4 in sequence through the third screw hole 52.

[0038] In the specific implementation process, if the reinforcing plate 5 is not installed, the pressure of the upper arch assembly on the temporary invert arch assembly 4 is directly transmitted by the rotating connector 2, which is prone to damage. Therefore, in this embodiment, a reinforcing plate 5 is installed. Its second screw hole 51 is connected to the overlapping plate 12 of the tunnel sidewall support plate 1, and its third screw hole 52 is connected to the overlapping plate 12 of the temporary invert arch assembly 4 and the first blade 21. At this time, the reinforcing plate 5 also serves as a component for transmitting the pressure of the upper arch assembly, reducing the stress on the rotating connector 2. In addition, the connection method of the reinforcing plate 5 is detachable. After removing the reinforcing plate 5, it will not affect the temporary invert arch assembly 4 from the... Figures 1 to 2 The conversion process.

[0039] To simplify the construction process, it is also possible to... Figure 15 As shown, this results in the thickness difference between the support plate 1 and the overlapping plate 12 being greater than the thickness of the reinforcing plate 5. For example... Figure 14As shown, if the thickness of the reinforcing plate 5 is too large, a space to accommodate the reinforcing plate 5 needs to be excavated from the bottom rock layer; otherwise, there will be a gap between the temporary invert arch assembly 4 and the bottom rock layer. The thickness of the reinforcing plate 5 is set to be less than the thickness difference between the support plate 1 and the overlapping plate 12, as follows: Figure 15 As shown, without excavating the bottom rock layer, the temporary invert arch group 4 is laid. Optimally, the thickness difference between the support plate 1 and the overlapping plate 12 is exactly equal to the sum of the thicknesses of the reinforcing plate 5 and the first blade 21.

[0040] In summary, the bench excavation method can be adopted for construction. First, the upper bench face is excavated, and then the surrounding rock is supported. Figure 1 As shown, after the support plate 1 is pre-connected, it is first fixed to the top and sidewalls of the tunnel. Since adjacent support plates 1 can rotate, the remaining support plates 1 can be connected to the tunnel floor after rotation, forming a temporary invert arch assembly 4. Then, the lower bench face is excavated, and the surrounding rock is supported. During support, the temporary invert arch assembly 4 constructed on the upper bench can be... Figure 2 As shown, it rotates to the tunnel sidewall and then connects to it. The temporary invert arch assembly 4 is directly converted into the side support 8, which is convenient and accelerates the construction progress. Finally, as shown... Figure 3 As shown, the lower arch 6 is constructed to form a complete ring structure for the tunnel support. The connection surface between the lower arch 6 and the side support 8 can be set as an inclined surface. When the side support 8 is under pressure, the side support 8 applies pressure towards the tunnel interior to the lower arch 6. Since the lower arch 6 is arc-shaped, it also applies an upward pressure towards the tunnel exterior to the side support 8, thereby improving the overall bearing capacity of the support.

[0041] The support plate 1 is mainly connected to the surrounding rock through anchor bolts 9. The anchor bolts 9 can be grouted anchor bolts 9. As a tension member that penetrates deep into the stratum, one end of the grouted anchor bolt 9 is connected to the engineering structure, and the other end penetrates into the stratum. The entire anchor bolt 9 is divided into a free section and an anchored section. The free section refers to the section where the tension at the head of the anchor bolt 9 is transmitted to the anchored section. Its function is to apply prestress to the anchor bolt 9. The anchored section refers to the area where the cement grout bonds the prestressed tendons to the soil layer. Its function is to increase the bonding friction between the anchored section and the soil layer, increase the bearing capacity of the anchored section, and transmit the tension of the free section to the depth of the soil.

[0042] Before laying the waterproof membrane, the steel plate assembly must be cleaned and sanded to ensure cleanliness and flatness. Then, precise measurements are taken based on the actual situation to determine and cut the waterproof membrane, and finally, the membrane is laid. The waterproof membrane can be laid using either nails or nail-free methods. During installation, a pressure roller can be used to ensure flatness and stability.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for rapid support in loosely packed layers, characterized in that, include: S1. Pre-positioning: Before excavation, bolts are used to pre-connect each support plate on the ground, and adjacent support plates are also rotatably connected by rotatable connectors. S2. Loosen the bolts: Remove the bolts used to connect adjacent support plates; S3. Erecting support: Excavate the upper and lower bench faces in sequence and use support plates to support the surrounding rock. During the support process, use bolts to connect adjacent support plates again. S1 includes: dividing several support plate bodies into an upper arch group and a temporary inverted arch group; The temporary invert arch group and the upper arch group are connected in a secondary manner by a reinforcing plate. The rotating connector includes: The first blade has a first screw hole; The blade shaft is rotatably connected to the first blade. A second blade, rotatably connected to the blade shaft, the second blade comprising: The second transition section, one end of which is rotatably connected to the blade shaft; The second connecting segment, the other end of the second transition segment is connected to the second connecting segment, and the angle between the axis of the second transition segment in the length direction and the axis of the second connecting segment in the length direction is less than 180 degrees; The reinforcing plate is provided with a second screw hole and a third screw hole with mutually perpendicular axes. The reinforcing plate can be screwed to the upper arch assembly through the second screw hole, and the reinforcing plate can be screwed to the first blade and the temporary inverted arch assembly through the third screw hole in sequence.

2. The method for rapid support in loosely packed layers according to claim 1, characterized in that, The upper arch group is used to support the top and side walls of the tunnel when excavating the upper bench. The temporary invert arch group is used as a temporary invert arch for the bottom wall of the tunnel when excavating the working face of the upper bench. After the support plates in the upper arch group are pre-positioned, they are pre-positioned with the support plates in the temporary invert arch group. The two support plates in the middle of the temporary invert arch group are not pre-positioned.

3. The method for rapid support in loosely packed layers according to claim 1, characterized in that, The number of support plates in the upper arch group is odd.

4. The method for rapid support in loosely packed layers according to claim 1, characterized in that, The S3 includes: when excavating the lower bench face, rotating the support plate of the temporary invert arch group to the tunnel sidewall as a side support to support the surrounding rock of the sidewall.

5. The method for rapid support in loosely packed layers according to claim 3, characterized in that, Also includes: S4. Construct the lower arch, with both ends of the lower arch connected to the side supports on the left and right sides of the tunnel, respectively.

6. The method for rapid support in loosely packed layers according to claim 1, characterized in that, The first blade includes: A first transition section, one end of which is rotatably connected to the blade shaft; The first connecting segment, the other end of the first transition segment is connected to the first connecting segment, the angle between the axis of the first transition segment in the length direction and the axis of the first connecting segment in the length direction is less than 180 degrees, and the first connecting segment is provided with the first screw hole.

7. The method for rapid support in loosely packed layers according to claim 1, characterized in that, The rotating connector further includes: The second transition section and the second connecting section are connected by the reinforcing rib.

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