Supporting structure for weak surrounding rock tunnel

Abstract

The invention provides a supporting structure for a weak surrounding rock tunnel, and belongs to the technical field of tunnel engineering. The supporting structure for the weak surrounding rock tunnel comprises a ground fixing mechanism and a top supporting mechanism. The ground fixing mechanism comprises a bottom plate, an anchor rod and a lateral protection assembly. The top supporting mechanism comprises a telescopic part, a first sleeve, a first spring, a first sliding rod and a first top plate, the first sleeve is fixed to the top of the telescopic part, and the bottom end of the first sliding rod is fixedly connected with the bottom of an inner cavity of the first sleeve through the first spring. When the device is used, the telescopic piece drives the first sleeve to move, the height of the first sleeve is adjusted, so that the first spring in the first sleeve is in a compressed state, and a certain supporting buffer space is reserved for the top supporting mechanism; and the compressed first spring can enable the first top plate to always support and protect the rock mass.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering, in particular to a supporting structure for a soft surrounding rock tunnel. Background Art

[0002] For tunnel engineering, the most concerning issue is the stability of the stratum after it is dug into the tunnel, because stable stratum means that the deformation of the stratum into the tunnel caused by tunnel excavation is very small and can be basically stopped in a relatively short period of time.

[0003] Existing support structures generally only have basic supporting functions and can only prevent rocks from rolling down. They cannot automatically adapt to the deformation caused by tunnel excavation and have poor protection capabilities. Summary of the Invention

[0004] In order to make up for the above shortcomings, the present invention provides a support structure for soft surrounding rock tunnels, aiming to improve the problem that the existing support structure generally only has basic supporting functions, can only prevent rocks from rolling, cannot automatically adapt to the deformation caused by tunnel excavation, and has poor protection capabilities.

[0005] The present invention is achieved in that:

[0006] The invention provides a supporting structure for a soft surrounding rock tunnel, comprising a ground fixing mechanism and a top supporting mechanism.

[0007] The ground fixing mechanism includes a base plate, an anchor rod and a lateral protection assembly. The anchor rod is arranged through the base plate, and the lateral protection assembly is arranged on the base plate.

[0008] The top support mechanism includes a telescopic member, a first sleeve, a first spring, a first slide bar, and a first top plate. The telescopic member is disposed in the middle of the upper surface of the bottom plate, the first sleeve is fixed to the top of the telescopic member, the bottom end of the first slide bar is fixedly connected to the bottom of the first sleeve's inner cavity via the first spring, and the first top plate is fixed to the top of the first slide bar. The height of the first sleeve is adjusted by the telescopic member to keep the first spring in the first sleeve in a compressed state, reserving a certain support buffer space. When the rock mass experiences slight shaking or displacement, the compressed first spring enables the first top plate to maintain support and protection for the rock mass.

[0009] In one embodiment of the present invention, at least two anchor rods are provided, and the at least two anchor rods are symmetrically arranged on the base plate. The symmetrically arranged anchor rods are used to firmly fix the base plate on the ground.

[0010] In one embodiment of the present invention, the lateral protection assembly includes a first fixed frame, a first threaded rod, a first rotating member, a first threaded sleeve, a first connecting rod, a third sleeve, a second spring, a second slide bar and a side plate, wherein the first fixed frame is fixed to the middle portion of the upper surface of the base plate, the first threaded rod is rotatably arranged in the first fixed frame, one end of the first threaded rod passes through the end of the first fixed frame and is fixedly connected to the first rotating member, the first threaded sleeve is threadedly connected to the first threaded rod, the top of the first threaded sleeve is fixedly connected to the outer end of the third sleeve via the first connecting rod, one end of the second slide bar is fixedly connected to the inner end of the third sleeve via the second spring, and the other end of the second slide bar is fixedly connected to one side of the side plate. It is used to support and protect the side walls of the tunnel.

[0011] In one embodiment of the present invention, the first rotating member includes a first knob and a first anti-slip sleeve, wherein the first knob is fixed to one end of the first threaded rod, and the first anti-slip sleeve is mounted on the first knob, thereby increasing grip friction and facilitating rotation of the first rotating member.

[0012] In one embodiment of the present invention, the ground fixing mechanism further includes a hand piece, and two hand pieces are symmetrically fixed on the upper surface of the base plate, so as to facilitate the grasping of the device during transfer and the fixing to the lifting equipment.

[0013] In one embodiment of the present invention, the handpiece includes a handle and a second anti-slip sleeve, wherein the handle is fixed to the upper surface of the base plate, and the second anti-slip sleeve is sleeved on the handle. The provision of the second anti-slip sleeve increases gripping friction.

[0014] In one embodiment of the present invention, the telescopic member includes a second sleeve, a threaded sleeve, a slider, a third threaded rod, a driven bevel gear and an active bevel gear, the bottom end of the second sleeve is fixed to the middle portion of the upper surface of the base plate, the threaded sleeve is slidably arranged in the second sleeve, the slider is fixed to the side portion of the outer wall of the threaded sleeve, a sliding groove is provided through the side wall of the second sleeve, the slider and the sliding groove are clearance-matched, the third threaded rod is rotatably penetrated and arranged on the second sleeve, the threaded sleeve is threadedly sleeved on the third threaded rod, the bottom end of the third threaded rod passes through the bottom of the second sleeve and the top of the first fixed frame and is keyed to the driven bevel gear, the active bevel gear is keyed to the first threaded rod, and the active bevel gear is meshed with the driven bevel gear.

[0015] In one embodiment of the present invention, the first top plate includes a first plate body and a second connecting rod, and the lower surface of the first plate body is fixedly connected to the top end of the first sliding rod through the second connecting rod.

[0016] In one embodiment of the present invention, the top support mechanism further includes an auxiliary limiting member, which is provided on the second sleeve and plays a guiding and limiting role for the threaded sleeve to a certain extent.

[0017] In one embodiment of the present invention, the auxiliary limiting member includes a third connecting rod and a limiting ring, the side of the limiting ring is fixedly connected to the side of the second sleeve through the third connecting rod, and the limiting ring is slidably mounted on the threaded sleeve.

[0018] In the existing support structure, those with a large support area also occupy a large space, which is inconvenient to transfer within the tunnel. Those with a small support area have relatively poor protection capabilities for the tunnel. To solve the above problems, the present invention also provides the following technical solutions:

[0019] In one embodiment of the present invention, the top support mechanism further includes an extended support assembly, which includes a second top plate, a driving member, a connecting block, and a fourth connecting rod. The second top plate is hinged on the first plate body, the driving member is arranged on the side of the second connecting rod, the two connecting blocks are respectively fixed to the lower surface of the second top plate and the end of the piston rod of the driving member, and the two ends of the fourth connecting rod are respectively rotatably connected to the two connecting blocks. The piston rod of the driving member is extended, and the second top plate is driven to rotate through the fourth connecting rod and the two connecting blocks, thereby increasing the support and protection area of the top support mechanism. When the piston rod of the driving member is retracted, the space occupied by the top support mechanism can be reduced, which facilitates the transfer of the device.

[0020] In one embodiment of the present invention, the second top plate includes a second plate body and a hinge, and one side of the lower surface of the second plate body is rotatably connected to one side of the lower surface of the second plate body through the hinge.

[0021] In one embodiment of the present invention, the driving member includes a fixing plate and a driving member body, the fixing plate is fixed to a side portion of the second connecting rod, and the driving member body is fixed to the fixing plate.

[0022] The existing segmented support structure lacks connection between adjacent components, and the impact resistance of individual components is poor. The integral support structure is too large and inconvenient to move. To solve the above problems, the present invention also provides the following technical solutions:

[0023] The supporting structure for a soft surrounding rock tunnel provided by the present invention further includes a bottom connecting mechanism.

[0024] The bottom connection mechanism includes a second fixed frame, a second threaded rod, a second rotating member, a second threaded sleeve, a fifth connecting rod, a connecting plate, and a second locking member. The second threaded rod is rotatably arranged in the second fixed frame. One end of the second threaded rod passes through the end of the second fixed frame and is fixedly connected to the second rotating member. Two second threaded sleeves are threadedly connected to the second threaded rod. The bottom of the second threaded sleeve is fixedly connected to the upper surface of the connecting plate through the fifth connecting rod. Grooves are provided on both sides of the upper surface of the bottom plate. The connecting plate is fixed in the grooves by the second locking member. Rotating the second rotating member drives the second threaded rod to rotate, so that the two second threaded sleeves respectively drive the two connecting plates away from each other through the two fifth connecting rods, so that the spacing between the two connecting plates meets the fixing requirements. The two connecting plates are respectively fixed to the grooves at the ends of the two bottom plates by the second locking member. The two adjacent ground fixing mechanisms are connected by the bottom connection mechanism, thereby enhancing the impact resistance of the ground fixing mechanisms and thus improving the protection capability of the entire device. At the same time, after removing the bottom connection mechanism, the space occupied by the device is reduced, making it convenient to separate and transfer the various components.

[0025] In one embodiment of the present invention, the second rotating member includes a second knob and a third anti-slip sleeve, the second knob is fixed to one end of the second threaded rod, and the third anti-slip sleeve is sleeved on the second knob.

[0026] The beneficial effect of the present invention is that: the support structure for soft surrounding rock tunnels obtained by the present invention through the above design, when in use, drives the first sleeve to move through the telescopic member, adjusts the height of the first sleeve, and puts the first spring in the first sleeve in a compressed state, reserving a certain support buffer space for the top support mechanism. When the rock mass shakes or displaces slightly, the compressed first spring can enable the first top plate to always maintain support and protection for the rock mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of the three-dimensional structure of a support structure for a soft surrounding rock tunnel provided by an embodiment of the present invention;

[0029] Figure 2 A three-dimensional diagram of a ground fixing mechanism provided in an embodiment of the present invention;

[0030] Figure 3A front view of a lateral protection assembly and a telescopic member provided in an embodiment of the present invention;

[0031] Figure 4 A front view of the telescopic member and the auxiliary limiting member provided in an embodiment of the present invention;

[0032] Figure 5 A front view of a top support mechanism provided in accordance with an embodiment of the present invention;

[0033] Figure 6 A front view of an extended support assembly provided for an embodiment of the present invention;

[0034] Figure 7 A three-dimensional diagram of a bottom connection mechanism provided in an embodiment of the present invention;

[0035] Figure 8 A cross-sectional view of a second fixing frame provided in an embodiment of the present invention.

[0036] In the figure: 100-ground fixing mechanism; 110-bottom plate; 111-groove; 120-anchor rod; 130-lateral protection assembly; 131-first fixing frame; 132-first threaded rod; 133-first rotating member; 1331-first knob; 1332-first anti-slip sleeve; 134-first threaded sleeve; 135-first connecting rod; 136-side plate; 137-third sleeve; 138-second spring; 139-second slide rod; 140-handpiece; 141-handle; 142-second anti-slip sleeve; 200-top support mechanism; 210-telescopic member; 211-second sleeve; 212-threaded sleeve; 213-third threaded rod; 214-driven bevel gear; 215-driving bevel gear; 216-slider; 217-slide groove; 22 0-first sleeve; 230-first spring; 240-first sliding rod; 250-first top plate; 251-first plate body; 252-second connecting rod; 260-auxiliary limiting member; 261-third connecting rod; 262-limiting ring; 270-extension support assembly; 271-second top plate; 2711-second plate body; 2712-hinge; 272-driving member; 2721-fixing plate; 2722-driving member body; 273-connecting block; 274-fourth connecting rod; 300-bottom connecting mechanism; 310-second fixed frame; 320-second threaded rod; 330-second rotating member; 331-second knob; 332-third anti-slip sleeve; 340-second threaded sleeve; 350-fifth connecting rod; 360-connecting plate; 370-second locking member. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] Example

[0045] See also Figure 1-8 The present invention provides a technical solution: a support structure for a soft rock tunnel includes a ground fixing mechanism 100, a top supporting mechanism 200 and a bottom connecting mechanism 300.

[0046] The top support mechanism 200 is fixed on the top support mechanism 200, and the ground fixing mechanism 100 is used to fix the top support mechanism 200 to the tunnel ground. The top support mechanism 200 is used to support and protect the top of the tunnel. The bottom connecting mechanism 300 is arranged between two adjacent ground fixing mechanisms 100 and is used to connect two adjacent ground fixing mechanisms 100, thereby enhancing the impact resistance of the ground fixing mechanism 100, thereby improving the protection capability of the entire structure.

[0047] See also Figure 2 and Figure 3The ground fixing mechanism 100 includes a base plate 110, an anchor rod 120 and a lateral protection assembly 130. The anchor rod 120 is arranged on the base plate 110. There are at least two anchor rods 120, and at least two anchor rods 120 are symmetrically arranged on the base plate 110 for firmly fixing the base plate 110 on the ground. The lateral protection assembly 130 is arranged on the base plate 110 for supporting and protecting the side wall of the tunnel. The lateral protection assembly 130 includes a first fixing frame 131, a first threaded rod 132, a first rotating member 133, a first threaded sleeve 134, a first connecting rod 135, a third sleeve 137, a second spring 138, a second sliding rod 139 and a side plate 136. The first fixing frame 131 is fixed to the middle part of the upper surface of the base plate 110, the first threaded rod 132 is rotatably arranged in the first fixing frame 131, one end of the first threaded rod 132 passes through the end of the first fixing frame 131 and is fixedly connected to the first rotating member 133, the first rotating member 133 The first anti-slip sleeve 1332 is a rubber sleeve. The first knob 1331 is fixed to one end of the first threaded rod 132. The first anti-slip sleeve 1332 is sleeved on the first knob 1331, which increases the gripping friction and facilitates the rotation of the first knob 1331. The first threaded sleeve 134 is threadedly connected to the first threaded rod 132. The top of the first threaded sleeve 134 is fixedly connected to the outer end of the third sleeve 137 through the first connecting rod 135. One end of the second sliding rod 139 is fixedly connected to the inner cavity end of the third sleeve 137 through the second spring 138. The other end of the second sliding rod 139 is fixedly connected to one side of the side plate 136. Rotating the first rotating member 133 drives the first threaded rod 132 to rotate, so that the first threaded sleeve 134 indirectly drives the side plate 136 to move toward the wall through the first connecting rod 135, and then cooperates with the second spring 138 compressed in the third sleeve 137 to complete the support and protection of the tunnel side wall.

[0048] In some specific embodiments of the present application, the ground fixing mechanism 100 also includes a handpiece 140, and two handpieces 140 are symmetrically fixed on the upper surface of the base plate 110 to facilitate the transportation of the device. The handpiece 140 includes a handle 141 and a second anti-slip cover 142. The second anti-slip cover 142 is a rubber cover. The handle 141 is fixed on the upper surface of the base plate 110, and the second anti-slip cover 142 is mounted on the handle 141 to increase the gripping friction.

[0049] See also Figure 4-6The top support mechanism 200 includes a telescopic member 210, a first sleeve 220, a first spring 230, a first slide bar 240 and a first top plate 250. The telescopic member 210 is arranged in the middle of the upper surface of the bottom plate 110. The first sleeve 220 is fixed to the top of the telescopic member 210. The bottom end of the first slide bar 240 is fixedly connected to the bottom of the inner cavity of the first sleeve 220 through the first spring 230. The first top plate 250 is fixed to the top of the first slide bar 240. The first top plate 250 includes a first plate body 251 and The second connecting rod 252 and the lower surface of the first plate 251 are fixedly connected to the top of the first sliding rod 240 through the second connecting rod 252. The height of the first sleeve 220 is adjusted by the telescopic member 210, so that the first spring 230 in the first sleeve 220 is in a compressed state, so that the upper surface of the first plate 251 maintains close contact with the top of the tunnel. When the rock mass shakes or displaces slightly, the compressed first spring 230 can enable the first plate 251 to always maintain its supporting and protective effect on the rock mass.

[0050] The third threaded rod 213 is threadedly sleeved on the third threaded rod 213, and the third threaded rod 213 is threadedly sleeved on the third threaded rod 213. .... The third threaded rod 213 is threadedly sleeved on the third threaded rod 213. The third threaded rod 213 is threadedly sleeved on the third threaded rod 213. The third threaded rod 213 is threadedly sleeved on the third threaded rod 213. The third threaded rod 213 is threadedly sleeved on the third threaded rod 213. The third threaded rod 213 is threadedly sleeved on the third threaded rod 213. The third threaded rod 213 is threadedly sleeved on the third threaded rod 213. The third threaded rod 213 is thread The gear 215 is keyed to the first threaded rod 132, and the active bevel gear 215 is meshed with the driven bevel gear 214. When the first threaded rod 132 rotates, the third threaded rod 213 can be driven to rotate through the transmission action of the active bevel gear 215 and the driven bevel gear 214, reducing driving components and simplifying the operation process. The threaded sleeve 212 then slides up in the second sleeve 211 under the limiting action of the slider 216, thereby adjusting the height of the first plate body 251. The top support mechanism 200 also includes an auxiliary limiting member 260, which is arranged on the second sleeve 211 and plays a guiding and limiting role for the threaded sleeve 212, thereby enhancing the supporting stability of the telescopic member 210; the auxiliary limiting member 260 includes a third connecting rod 261 and a limiting ring 262, the side of the limiting ring 262 is fixedly connected to the side of the second sleeve 211 through the third connecting rod 261, and the limiting ring 262 is slidably sleeved on the threaded sleeve 212.

[0051] In the existing support structure, those with a large support area also occupy a large space, which is inconvenient to transfer within the tunnel. Those with a small support area have relatively poor protection capabilities for the tunnel. To solve the above problems, the present invention also provides the following technical solutions:

[0052] The top support mechanism 200 also includes an extended support assembly 270, which includes a second top plate 271, a driving member 272, a connecting block 273 and a fourth connecting rod 274. The second top plate 271 is hinged on the first plate body 251. The second top plate 271 includes a second plate body 2711 and a hinge 2712. One side of the lower surface of the second plate body 2711 is rotatably connected to one side of the lower surface of the second plate body 2711 through the hinge 2712. The driving member 272 is arranged on the side of the second connecting rod 252. The driving member 272 includes a fixed plate 2721 and a driving member body 2722. The driving member body 2722 can be an electric push rod or an electric cylinder. The fixed plate 2721 is fixed to the second connecting rod 25 2 side, the driver body 2722 is fixed to the fixed plate 2721, and the two connecting blocks 273 are respectively fixed to the lower surface of the second top plate 271 and the end of the piston rod of the driver 272. The two ends of the fourth connecting rod 274 are rotatably connected to the two connecting blocks 273. When the height adjustment of the first sleeve 220 is completed, the driver body 2722 is started, the piston rod of the driver body 2722 is extended, and the second plate body 2711 is driven to rotate through the fourth connecting rod 274 and the two connecting blocks 273, thereby increasing the support and protection area of the top support mechanism 200. When the piston rod of the driver body 2722 is retracted, the space occupied by the top support mechanism 200 can be reduced, making it easier to move the device.

[0053] The existing segmented support structure lacks connection between adjacent components, and the impact resistance of individual components is poor. The integral support structure is too large and inconvenient to move. To solve the above problems, the present invention also provides the following technical solutions:

[0054] See also Figure 7 and Figure 8The bottom connection mechanism 300 includes a second fixed frame 310, a second threaded rod 320, a second rotating member 330, a second threaded sleeve 340, a fifth connecting rod 350, a connecting plate 360 and a second locking member 370. The second threaded rod 320 is rotatably arranged in the second fixed frame 310. One end of the second threaded rod 320 passes through the end of the second fixed frame 310 and is fixedly connected to the second rotating member 330. The second rotating member 330 includes a second knob 331 and a third anti-slip sleeve 332. The third anti-slip sleeve 333 32 is a rubber sleeve, the second knob 331 is fixed to one end of the second threaded rod 320, and the third anti-slip sleeve 332 is sleeved on the second knob 331 to increase the grip friction and facilitate the rotation of the second knob 331. The two second threaded sleeves 340 are both threadedly connected to the second threaded rod 320. The second threaded rod 320 is provided with two sections of external threads with opposite thread directions. The two second threaded sleeves 340 are respectively threadedly connected to the two sections of external threads. The bottom of the second threaded sleeve 340 is connected to the fifth connecting rod 350 through the fifth connecting rod 350. The upper surface of the connecting plate 360 is fixedly connected, and grooves 111 are opened on both sides of the upper surface of the bottom plate 110. The connecting plate 360 is fixed in the groove 111 by the second locking piece 370. The thickness of the connecting plate 360 is not greater than the depth of the groove 111. After the two adjacent ground fixing mechanisms 100 are selected and fixed, the second rotating member 330 drives the second threaded rod 320 to rotate, so that the two second threaded sleeves 340 respectively drive the two connecting plates 360 away from each other through the two fifth connecting rods 350, so that the spacing between the two connecting plates 360 meets the fixing requirements, and the two connecting plates 360 are respectively fixed to the grooves 111 at the ends of the two bottom plates 110 through the second locking piece 370, and the two adjacent ground fixing mechanisms 100 are connected through the bottom connecting mechanism 300, thereby enhancing the impact resistance of the ground fixing mechanism 100, thereby improving the protection capability of the entire device. At the same time, after removing the bottom connecting mechanism 300, the space occupied by the device is reduced, and it is convenient to separate and transfer the components.

[0055] Specifically, the working principle of the support structure for soft rock tunnels is as follows: when in use, the bottom plate 110 is fixed to the ground through the anchor rod 120, and the first rotating member 133 is rotated to drive the first threaded rod 132 to rotate, so that the first threaded sleeve 134 indirectly drives the side plate 136 to move toward the wall through the first connecting rod 135, and then cooperates with the second spring 138 compressed in the third sleeve 137 to complete the support and protection of the tunnel side wall. When the first threaded rod 132 rotates, it can drive the third threaded rod 213 to rotate through the transmission action of the active bevel gear 215 and the driven bevel gear 214, and the threaded sleeve 212 then slides up in the second sleeve 211 under the limiting action of the slider 216, so that the first spring 230 in the first sleeve 220 remains in a compressed state, reserving a certain support buffer space for the top support mechanism 200, so that the surface of the first plate body 251 The surface always keeps in close contact with the top of the tunnel, and the driving member body 2722 is started. The piston rod of the driving member body 2722 is extended, and the second plate body 2711 is driven to rotate through the fourth connecting rod 274 and the two connecting blocks 273, thereby increasing the support and protection area of the top support mechanism 200. After the two adjacent ground fixing mechanisms 100 are fixed, the second rotating member 330 is rotated to drive the second threaded rod 320 to rotate, so that the two second threaded sleeves 340 respectively drive the two connecting plates 360 away from each other through the two fifth connecting rods 350, and the two connecting plates 360 are respectively fixed to the grooves 111 at the ends of the two bottom plates 110 through the second locking members 370. The two adjacent ground fixing mechanisms 100 are connected through the bottom connecting mechanism 300, thereby enhancing the impact resistance of the ground fixing mechanism 100, thereby improving the protection capability of the entire device.

[0056] It should be noted that the specific model and specifications of the driving member body 2722 need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0057] The power supply and principle of the driving member body 2722 are clear to those skilled in the art and will not be described in detail here.

[0058] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0059] The foregoing is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0060] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A support structure for a tunnel with soft surrounding rock, characterized in that: include A ground fixing mechanism (100), the ground fixing mechanism (100) comprising a base plate (110), an anchor rod (120) and a lateral protection assembly (130), the anchor rod (120) being arranged through the base plate (110), and the lateral protection assembly (130) being arranged on the base plate (110); A top support mechanism (200), the top support mechanism (200) includes a telescopic member (210), a first sleeve (220), a first spring (230), a first slide bar (240) and a first top plate (250), the telescopic member (210) is arranged in the middle of the upper surface of the bottom plate (110), the first sleeve (220) is fixed to the top of the telescopic member (210), the bottom end of the first slide bar (240) is fixedly connected to the bottom of the inner cavity of the first sleeve (220) through the first spring (230), and the first top plate (250) is fixed to the top of the first slide bar (240).

2. The supporting structure for a soft rock tunnel according to claim 1, characterized in that: At least two anchor rods (120) are provided, and at least two anchor rods (120) are symmetrically arranged on the bottom plate (110).

3. The supporting structure for a soft rock tunnel according to claim 1, characterized in that: The lateral protection assembly (130) includes a first fixed frame (131), a first threaded rod (132), a first rotating member (133), a first threaded sleeve (134), a first connecting rod (135), a third sleeve (137), a second spring (138), a second sliding rod (139) and a side plate (136), wherein the first fixed frame (131) is fixed to the middle of the upper surface of the bottom plate (110), the first threaded rod (132) is rotatably arranged in the first fixed frame (131), and one end of the first threaded rod (132) passes through the The end of the first fixed frame (131) is fixedly connected to the first rotating member (133), the first threaded sleeve (134) is threadedly connected to the first threaded rod (132), the top of the first threaded sleeve (134) is fixedly connected to the outer end of the third sleeve (137) through the first connecting rod (135), one end of the second sliding rod (139) is fixedly connected to the inner end of the third sleeve (137) through the second spring (138), and the other end of the second sliding rod (139) is fixedly connected to one side of the side plate (136).

4. The supporting structure for a soft rock tunnel according to claim 3, characterized in that: The first rotating member (133) includes a first knob (1331) and a first anti-slip sleeve (1332), wherein the first knob (1331) is fixed to one end of the first threaded rod (132), and the first anti-slip sleeve (1332) is sleeved on the first knob (1331).

5. The supporting structure for a soft rock tunnel according to claim 1, characterized in that: The ground fixing mechanism (100) further comprises a handheld piece (140), wherein two handheld pieces (140) are symmetrically fixed on the upper surface of the base plate (110).

6. The supporting structure for a soft rock tunnel according to claim 5, characterized in that: The hand piece (140) comprises a handle (141) and a second anti-slip cover (142), wherein the handle (141) is fixed on the upper surface of the base plate (110), and the second anti-slip cover (142) is sleeved on the handle (141).

7. The supporting structure for a soft rock tunnel according to claim 3, characterized in that: The telescopic member (210) comprises a second sleeve (211), a threaded sleeve (212), a slider (216), a third threaded rod (213), a driven bevel gear (214) and a driving bevel gear (215); the bottom end of the second sleeve (211) is fixed to the middle of the upper surface of the base plate (110); the threaded sleeve (212) is slidably arranged in the second sleeve (211); the slider (216) is fixed to the side of the outer wall of the threaded sleeve (212); a sliding groove (217) is provided through the side wall of the second sleeve (211); the slider (216) is connected to the driven bevel gear (214) and the driving bevel gear (215); The sliding groove (217) is clearance-fitted, the third threaded rod (213) is rotatably penetrated and arranged on the second sleeve (211), the threaded sleeve (212) is threadedly sleeved on the third threaded rod (213), the bottom end of the third threaded rod (213) penetrates the bottom of the second sleeve (211), the top of the first fixed frame (131) and is key-connected with the driven bevel gear (214), the driving bevel gear (215) is key-connected to the first threaded rod (132), and the driving bevel gear (215) is meshedly connected with the driven bevel gear (214).

8. The supporting structure for a soft rock tunnel according to claim 1, characterized in that: The first top plate (250) comprises a first plate body (251) and a second connecting rod (252); the lower surface of the first plate body (251) is fixedly connected to the top end of the first sliding rod (240) via the second connecting rod (252).

9. The supporting structure for a soft rock tunnel according to claim 7, characterized in that: The top support mechanism (200) further comprises an auxiliary limiting member (260), and the auxiliary limiting member (260) is arranged on the second sleeve (211).

10. The supporting structure for a soft rock tunnel according to claim 9, characterized in that: The auxiliary limiting member (260) comprises a third connecting rod (261) and a limiting ring (262); the side of the limiting ring (262) is fixedly connected to the side of the second sleeve (211) via the third connecting rod (261); and the limiting ring (262) is slidably sleeved on the threaded sleeve (212).

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