Advanced pipe shed support

Abstract

The utility model relates to an advanced pipe shed support, which comprises a plurality of segmented arch frames, a plurality of pipe sheds and a plurality of pipe sheds, a plurality of pipe shed pipes are arranged along the radian direction of the segmented arch frame; one end of each segmented arch frame is fixedly connected with a clamping block, an elastic limiting mechanism matched with the clamping block is installed at the corresponding position of the other segmented arch frame, when the segmented arch frames are in butt joint, the clamping blocks are pushed to be inserted into the elastic limiting mechanisms, in the insertion process, the elastic limiting mechanisms are extruded by the clamping blocks to generate elastic deformation, and an insertion path is provided for the clamping blocks. After the clamping blocks are completely inserted, the elastic limiting mechanisms gradually restore deformation by means of elasticity of the elastic limiting mechanisms, limit constraint is formed on the clamping blocks, and the clamping blocks are prevented from being disengaged, so that the segmented arch frames connected end to end are clamped and fixed, and the segmented arch frames are connected into a stable arch frame whole. According to the connection mode, bolts or pin shafts do not need to penetrate one by one like a traditional flange bolt or pin connection mode, operation steps are reduced, the tedious installation process is avoided, and the installation speed of the segmented arch frame is effectively increased.

Description

Technical Field

[0001] This utility model relates to the field of mine shaft and tunnel engineering technology, and in particular to an advanced pipe roof support. Background Technology

[0002] When a tunnel traverses weak and fractured surrounding rock, excavation disturbance can cause significant rock deformation. If initial support is not implemented promptly, the rock deformation may exceed its allowable range, potentially leading to face instability and tunnel collapse, resulting in substantial economic losses. In such cases, advanced support measures are necessary to control rock deformation and ensure safe tunnel construction. Pipe roof grouting can effectively suppress deformation of weak and fractured surrounding rock, improve the stress distribution of the tunnel support structure, and prevent collapses during construction.

[0003] Advanced pipe roof support typically includes components such as arch frames and pipe roofs. Traditional advanced pipe roof support arch frames are usually split arch frames, with each section of the arch frame connected by flange bolts or pins to form a single structure. However, the above connection structure requires inserting multiple bolts or pins one by one, which is cumbersome and slows down the installation speed. Utility Model Content

[0004] To solve or partially solve the problems existing in related technologies, this utility model provides an advanced pipe roof support system.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] An advanced pipe roof support system, comprising:

[0007] Segmented arch frames, with several sections;

[0008] The pipes of the pipe shed are arranged in several directions along the arc of the segmented arch frame;

[0009] One end of the segmented arch frame is equipped with a locking block, and the corresponding position of the other segmented arch frame is equipped with an elastic limiting mechanism, so that after the locking block is inserted, the elastic deformation of the elastic limiting mechanism is used to limit and constrain it, thereby fixing the segmented arch frames connected end to end.

[0010] Optionally, the elastic limiting mechanism includes:

[0011] The upper guide groove and the lower guide groove are set opposite to each other inside the segmented arch frame. An upper telescopic spring is installed in the upper guide groove and a lower telescopic spring is installed in the lower guide groove. An upper limit block is connected to the end of the upper telescopic spring away from the upper guide groove, and a lower limit block is connected to the end of the lower telescopic spring away from the lower guide groove.

[0012] Optionally, the end of the locking block away from the elastic limiting mechanism is connected to a fixing block via a connecting rod, and one end of the fixing block is fixed inside the segmented arch frame.

[0013] Optionally, the card block, upper limit block, and lower limit block are all wedge-shaped structures.

[0014] Optionally, the segmented arch frame has several elastic connecting rings arranged in an equally spaced circular array on its radially inner side, and one end of the pipe shed is inserted into the elastic connecting ring.

[0015] Optionally, the end of the elastic connecting ring away from the segmented arch frame has a notch.

[0016] Optionally, the pipe roof has several grouting holes, and adjacent pipe roofs are connected by threaded sleeves.

[0017] Optionally, the card block is an elastic card block.

[0018] The beneficial effects of this utility model are as follows: A locking block is fixedly connected to one end of the segmented arch frame, and an elastic limiting mechanism that cooperates with the locking block is installed at the corresponding position of the other segmented arch frame. When the segmented arch frames are joined, the locking block is pushed into the elastic limiting mechanism. During insertion, the elastic limiting mechanism undergoes elastic deformation due to the pressure of the locking block, providing an insertion path for the locking block. After the locking block is fully inserted, the elastic limiting mechanism gradually recovers its deformation due to its own elasticity, forming a limiting constraint on the locking block and preventing it from coming out. This achieves the locking and fixing of the segmented arch frames connected end to end, making each segmented arch frame connected into a stable arch frame whole. This connection method eliminates the need to insert bolts or pins one by one as required by traditional flange bolt or pin connections, reducing operation steps, avoiding a cumbersome installation process, and effectively speeding up the installation of the segmented arch frames.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0021] Figure 1 This is a schematic diagram of the advanced pipe roof support structure shown in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the arch frame snap-fit ​​structure shown in an embodiment of the present utility model;

[0023] Figure 3 This is a side view of the advanced pipe roof support shown in an embodiment of the present invention;

[0024] Figure 4This is a front view of the grouting drill hole layout shown in Embodiment 4 of this utility model;

[0025] Figure 5 This is a side view of the grouting drilling layout shown in Embodiment 4 of the present invention;

[0026] Figure 6 This is a front view of the advanced pipe shed hole in Embodiment 4 of this utility model;

[0027] Figure 7 This is a side view of the advanced tube shed hole shown in Embodiment 4 of this utility model.

[0028] Attached reference numerals: 1. Segmented arch frame, 2. Pipe shed, 3. Clamping block, 4. Elastic limiting mechanism, 5. Upper guide groove, 6. Lower guide groove, 7. Upper telescopic spring, 8. Lower telescopic spring, 9. Upper limit block, 10. Lower limit block, 11. Connecting rod, 12. Fixing block, 13. Connecting ring, 14. Notch, 15. Grouting hole, 16. Threaded sleeve. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0035] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0036] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate understanding by those skilled in the art.

[0037] Example 1:

[0038] See Figure 1 and Figure 2 An advanced pipe roof support system, wherein the advanced pipe roof support system comprises:

[0039] Segmented arch frame 1, with several sections;

[0040] Pipe 2, several of which are arranged along the arc direction of segmented arch frame 1;

[0041] One end of the segmented arch frame 1 is provided with a locking block 3, and the corresponding position of the other segmented arch frame 1 is provided with an elastic limiting mechanism 4, so that after the locking block 3 is inserted, the elastic deformation of the elastic limiting mechanism 4 is used to limit and constrain it, thereby fixing the segmented arch frames 1 connected end to end.

[0042] Specifically, several segmented arch frames 1 are connected to form an arch frame as a whole, which is used to provide temporary support for the surrounding rock, prevent the surrounding rock from collapsing due to stress release instability, ensure the safety of construction personnel and equipment, limit the deformation of the surrounding rock caused by stress redistribution, and maintain the stability of the tunnel structure. Several pipe roof pipes 2 are provided and are arranged circumferentially along the perimeter of the tunnel cross-section at a certain interval to form longitudinal support.

[0043] One end of the segmented arch frame 1 is fixedly connected to a locking block 3. At the corresponding position on the other segmented arch frame 1, an elastic limiting mechanism 4 that cooperates with the locking block 3 is installed. When the segmented arch frames 1 are joined, the locking block 3 is pushed into the elastic limiting mechanism 4. During insertion, the elastic limiting mechanism 4 undergoes elastic deformation due to the pressure of the locking block 3, providing an insertion path for the locking block 3. After the locking block 3 is fully inserted, the elastic limiting mechanism 4 gradually recovers its deformation due to its own elasticity, forming a limiting constraint on the locking block 3 and preventing it from coming out. This achieves the locking and fixing of the segmented arch frames 1 connected end to end, making each segmented arch frame 1 connected into a stable arch frame whole. This connection method eliminates the need to insert bolts or pins one by one as in traditional flange bolt or pin connections, reducing operation steps, avoiding cumbersome installation processes, and effectively speeding up the installation of the segmented arch frames 1.

[0044] Example 2:

[0045] See Figure 2 Based on Embodiment 1, optionally, the elastic limiting mechanism 4 includes:

[0046] The upper guide groove 5 and the lower guide groove 6 are arranged opposite to each other inside the segmented arch frame 1. An upper telescopic spring 7 is installed in the upper guide groove 5, and a lower telescopic spring 8 is installed in the lower guide groove 6. An upper limit block 9 is connected to the end of the upper telescopic spring 7 away from the upper guide groove 5, and a lower limit block 10 is connected to the end of the lower telescopic spring 8 away from the lower guide groove 6.

[0047] Specifically, the upper guide groove 5 is fixed to the top plate inside the segmented arch frame 1, and the lower guide groove 6 is fixed to the bottom plate inside the segmented arch frame 1. An upper telescopic spring 7 and a lower telescopic spring 8 are installed in the two guide grooves respectively. The guide grooves guide and restrict the extension and retraction paths of the two telescopic springs, while simultaneously improving their resistance to lateral bending. The end of the upper telescopic spring 7 away from the upper guide groove 5 and the end of the lower telescopic spring 8 away from the lower guide groove 6 are respectively fixedly connected to the upper limit block 9 and the lower limit block 10. When the locking block is inserted, the upper limit block 9 and the lower limit block 10 are compressed to compress the upper telescopic spring 7 and the lower telescopic spring 8, providing a path for the locking block 3. When the locking block 3 is fully inserted, the compressive force disappears, and the elasticity of the upper telescopic spring 7 and the lower telescopic spring 8 gradually recovers its deformation, thus forming a limiting constraint on the locking block 3 and preventing it from detaching. In this way, the complexity of connecting the segmented arch frame 1 is greatly reduced.

[0048] To improve the lateral bending resistance of the upper telescopic spring 7 and the lower telescopic spring 8, guide posts can be embedded inside the two telescopic springs, high-strength alloy steel springs can be used, multiple telescopic springs can be connected in parallel, and disc springs or conical springs can be used.

[0049] Optionally, the end of the locking block 3 away from the elastic limiting mechanism 4 is connected to a fixing block 12 via a connecting rod 11, and one end of the fixing block 12 is fixed inside the segmented arch frame 1.

[0050] Specifically, the two ends of the connecting rod 11 are fixedly connected to the locking block 3 and the fixing block 12 respectively. The fixing block 12 is fixed inside the hollow part of the segmented arch frame 1. After the locking is completed, the locking block 3, the connecting rod 11 and the fixing block 12 are completely embedded inside the corresponding segmented arch frame 1.

[0051] Optionally, the card block 3, the upper limit block 9, and the lower limit block 10 are all wedge-shaped structures.

[0052] Specifically, the inclined surface of the wedge structure can guide the locking block 3 when it is engaged with the upper limit block 9 and the lower limit block 10, so that the locking block 3 can be smoothly inserted into the corresponding position, reducing the difficulty of installation.

[0053] Example 3:

[0054] See Figure 1 and Figure 3 Based on the above embodiments, optionally, the radially inner side of the segmented arch frame 1 has a plurality of elastic connecting rings 13 arranged in an equally spaced circular array, and one end of the pipe shed pipe 2 is inserted into the elastic connecting ring 13.

[0055] Specifically, the pipe roof pipe 2 is clamped and fixed by the elastic connecting ring 13 to prevent the pipe roof pipe 2 from shifting or loosening, maintain its designed position, ensure the structural stability of the advanced support system, and effectively play its role in bearing the surrounding rock load.

[0056] Optionally, the elastic connecting ring 13 has a notch 14 at the end away from the segmented arch frame 1.

[0057] Specifically, through the design of elastic materials and notches 14, the elastic connecting ring 13 can adapt to pipe shed pipes 2 of different sizes, thereby improving its applicability.

[0058] Optionally, the pipe shed 2 is provided with a plurality of grouting holes 15, and adjacent pipe shed 2 are connected by threaded sleeves 16.

[0059] Specifically, cement grout, chemical grout, etc., are injected into the surrounding rock through grouting holes 15 to fill the fissures and pores in the surrounding rock, cement the loose rock mass, improve the integrity, strength, and stability of the surrounding rock, and reduce the risk of collapse during tunnel excavation. The threaded sleeve 16 connection eliminates the need for on-site welding; adjacent pipe roof pipes 2 can be connected simply by rotating and tightening, shortening construction time, improving efficiency, and meeting the needs of rapid tunnel construction. The threaded sleeve 16 provides sufficient connection strength to ensure that the pipe roof pipes 2 form a continuous and stable support structure along the longitudinal direction, effectively transferring axial loads (such as surrounding rock pressure), preventing connection failure, and maintaining the overall support function. The threaded connection allows for a certain degree of axial and radial deviation adjustment, and can still be successfully connected even with minor errors in construction positioning, enhancing construction adaptability.

[0060] Optionally, the card block 3 is an elastic card block.

[0061] Specifically, the elastic block can deform when squeezed, easily inserting into the corresponding mating structure (such as the elastic limiting mechanism 4), and after insertion, it returns to its original shape to achieve locking, reducing the difficulty of installation.

[0062] Example 4:

[0063] A construction method applicable to the above structure:

[0064] Grouting construction sequence: hole preparation → hole inlet pipe installation → water pressure test → grout preparation → grouting → site cleanup.

[0065] Construction sequence of advanced pipe roof process: pouring concrete for the bottom slab of the facing section (for drilling rig installation) → drilling layout → drilling construction → cleaning of accumulated slag.

[0066] The construction process in this embodiment is as follows: material preparation → on-site work environment inspection and treatment → shotcrete support at the working face → side grouting → advanced pipe roof construction → roof grouting → non-blasting excavation support (5.5 meters) → advanced pipe roof or grouting → blasting excavation.

[0067] Figure 4 This refers to the arrangement of grouting boreholes. Figure 4Middle: Side walls, spacing 0.5m, hole diameter 40mm, hole depth 3200mm, grouting pipe depth 3000mm. Holes in both the top and side walls are drilled using a 42mm diameter drill bit.

[0068]

[0069] Figure 5 The grouting holes are arranged in a planar configuration on the top edge of the wall. Figure 5 Middle: Top and side: Hole diameter 40mm, hole depth 3800mm, grouting pipe length 3800mm, the distance between the middle hole and the adjacent hole is 600mm, and the distance between the two side holes and the adjacent holes is 800mm.

[0070]

[0071] Figure 6 and Figure 7 It is an advanced pipe shed hole layout method. Figure 6 In the middle: the hole diameter is φ50mm, the hole depth is 8500mm, the inclination angle of the first cycle grouting is 20˚, the inclination angle of the second cycle grouting is 10˚, the hole is opened from the loose slag in the face section to the 2m position after the surrounding rock is stabilized, and after the single hole is completed, the drill rod is pre-embedded and used as an advanced pipe roof support. The drill rod diameter is 42mm.

[0072] Figure 7 In the first cycle, the distance from the pipe roof support to the top slab is 2862mm, and the pipe roof inclination angle is 20˚. In the second cycle, the distance from the pipe roof support to the top slab is 1431mm, the drilling inclination angle is 10˚, and the pipe roof support plane distance is 7923mm. The advanced pipe roof eye is selected for construction between the first and third arch frames, and the exposed length of the pipe roof is required to be no less than 20cm.

[0073] It should be noted that the structures and / or installation methods not detailed in this utility model are those that can be known by those skilled in the art in combination with common knowledge and / or existing technology, and are not the focus of this utility model. They will not be described further here.

[0074] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model; the dimensions of the drawings are not related to the specific physical object, and the physical object dimensions can be arbitrarily changed.

Claims

1. An advanced pipe roof support system, characterized in that, The aforementioned advanced pipe roof support includes: Segmented arch frame (1), with several sections; The pipes (2) of the pipe shed are arranged in several directions along the arc of the segmented arch frame (1); One end of the segmented arch frame (1) is provided with a locking block (3), and the corresponding position of the other segmented arch frame (1) is provided with an elastic limiting mechanism (4), so that after the locking block (3) is inserted, the elastic deformation of the elastic limiting mechanism (4) is used to limit and constrain it, thereby fixing the segmented arch frames (1) connected end to end.

2. The advanced pipe roof support as described in claim 1, characterized in that, The elastic limiting mechanism (4) includes: An upper guide groove (5) and a lower guide groove (6) are set opposite to each other inside the segmented arch frame (1). An upper telescopic spring (7) is installed in the upper guide groove (5), and a lower telescopic spring (8) is installed in the lower guide groove (6). An upper limit block (9) is connected to the end of the upper telescopic spring (7) away from the upper guide groove (5), and a lower limit block (10) is connected to the end of the lower telescopic spring (8) away from the lower guide groove (6).

3. The advanced pipe roof support as described in claim 1, characterized in that, The end of the card block (3) away from the elastic limiting mechanism (4) is connected to a fixing block (12) via a connecting rod (11), and one end of the fixing block (12) is fixed inside the segmented arch frame (1).

4. The advanced pipe roof support as described in claim 2, characterized in that, The card block (3), upper limit block (9) and lower limit block (10) are all wedge-shaped structures.

5. The advanced pipe roof support as described in claim 1, characterized in that, The segmented arch frame (1) has several elastic connecting rings (13) arranged in an equally spaced circular array on the radial inner side, and one end of the pipe shed pipe (2) is inserted into the elastic connecting ring (13).

6. The advanced pipe roof support as described in claim 5, characterized in that, The elastic connecting ring (13) has a notch (14) at the end away from the segmented arch frame (1).

7. The advanced pipe roof support as described in claim 1, characterized in that, The pipe shed (2) is provided with several grouting holes (15), and adjacent pipe sheds (2) are connected by threaded sleeves (16).

8. The advanced pipe roof support as described in any one of claims 1 or 3, characterized in that, The card block (3) is an elastic card block.

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