A press-in pipe roof support structure

Abstract

The application discloses a press-in pipe shed supporting structure, and relates to the technical field of underground engineering construction. The supporting structure comprises a steel arch, an adjusting support and a plurality of supporting steel pipes. The steel arch has an arch part capable of forming a circular arc support. A plurality of sliding blocks are arranged on the arch part in a sliding mode. The sliding blocks can slide towards each other or separate from each other along the arc of the arch. Each supporting steel pipe is detachably connected with the sliding blocks, and the axial direction of the supporting steel pipe and the sliding plane of the sliding block form an included angle. The adjusting support has a support part and an extension part which are connected with each other. The extension part is connected with the two ends of the arch part, and is used for adjusting the relative height of the end of the arch part alone or simultaneously. The supporting structure can form concentrated or dispersed supporting effects on the inner sidewall of the tunnel by arranging the plurality of supporting steel pipes in a sliding mode. The whole steel arch can be lifted with a deviation by adjusting the adjusting support, so as to support the situation that the relative height of one side of the tunnel is relatively high. The adjusting mode is more flexible, and the supporting effect is more sufficient.

Description

Technical Field

[0001] This invention relates to the field of underground engineering construction technology, and more specifically, to a press-in pipe roof support structure. Background Technology

[0002] Pipe roof support, as an auxiliary method in tunnel excavation, plays an important role in preventing tunnel collapse, suppressing ground displacement, and controlling surface settlement. Seamless steel pipes are typically used for the pipe roof support, with multiple pipes arranged in an arch shape to adapt to the arched support form on the inner surface of the tunnel. After the pipe roof support is installed, it is used as a grouting pipe, allowing grout to be injected directly into the pipe roof.

[0003] However, during tunnel support construction, the inner surface of the tunnel does not collapse or press down uniformly. This necessitates adjusting the concentrated position of the support to address the side with more severe subsidence. Traditional pipe roof support systems mostly use fixed pipe roofs, lacking the ability to flexibly adjust the support position. Even if simple sliding adjustments are possible, the support strength and methods for the inner surface of the tunnel are limited, making it difficult to meet the requirements of actual working conditions.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The purpose of this invention is to provide a pressurized pipe roof support structure. This support structure, by configuring multiple support steel pipes in a sliding manner, can form a concentrated or dispersed support effect on the inner wall of the tunnel. Furthermore, by adjusting the support, the entire steel arch frame can be offset and raised to support the side with the more severe collapse. This not only makes the adjustment method more flexible but also provides more comprehensive support.

[0006] The embodiments of the present invention are implemented as follows:

[0007] A press-fit pipe roof support structure includes a steel arch frame, an adjusting bracket, and multiple supporting steel pipes. The steel arch frame has an arch portion capable of forming an arc support. Multiple sliders are slidably disposed on the arch portion, and the sliders can slide towards or separate from each other along the arc direction of the arch portion. Each supporting steel pipe is detachably connected to a slider, and the axial direction of the supporting steel pipe is at an angle to the sliding plane of the slider. The adjusting bracket has an interconnected support portion and a telescopic portion, and the telescopic portion is connected to both ends of the arch portion for adjusting the relative height of the ends of the arch portion individually or simultaneously. The adjustment direction of the ends of the arch portion is coplanar with the sliding plane of the slider.

[0008] In an optional embodiment, the axial direction of the support steel pipe is perpendicular to the sliding plane of the slider, and the adjustment direction of the arch end is perpendicular to the axial direction of the support steel pipe.

[0009] In an optional embodiment, the adjusting bracket includes a support frame and a lifting mechanism mounted on the support frame. The bottom of the support frame forms a mounting portion, the positioning end of the lifting mechanism is connected to the support frame, and the telescopic end of the lifting mechanism forms a hinge with a limit with the end of the arch.

[0010] In an optional embodiment, the lifting mechanism includes a lead screw, a threaded sleeve, and a support column. The lead screw is rotatably connected to the support frame, the threaded sleeve is threaded to the lead screw, and the support column is connected to the threaded sleeve. Rotating the lead screw causes the support column to extend or retract via the threaded sleeve. The support column is formed with a positioning column, and the arched end is formed with a positioning groove. The groove wall of the positioning groove forms a gap with the outer wall of the positioning column, so that the positioning column can rotate or tilt relative to the positioning groove.

[0011] In an optional embodiment, one end of the support column is hinged to a threaded sleeve, and the other end of the support column is hinged to a support rod. The support rod, when the hinge is opened, can support the support column when the hinge is opened. The support frame is provided with a locking element for keeping the support column in a hinged closed state.

[0012] In an optional embodiment, the support rod includes a telescopically connected rod body and a sliding sleeve, the rod body being hinged to the support column, and the sliding sleeve being provided with a first limiting member for locking the relative sliding position of the rod body.

[0013] In an optional embodiment, a receiving groove for accommodating a support rod is provided on one side of the support column, and a second limiting member is provided on the side of the receiving groove away from the hinged end of the support rod. The second limiting member is used to movably engage the free end of the support rod.

[0014] In an alternative embodiment, the support pipe is slidably connected to the slider so that the support pipe can slide relative to the slider along its axial direction, and the slider is provided with fasteners for locking the sliding position of the support pipe.

[0015] In an alternative embodiment, the support steel pipe includes a first pipe body and a second pipe body that are telescopically connected.

[0016] In an optional embodiment, a grouting channel is formed in the inner cavity of the support steel pipe, and a reinforcing pipe is arranged along its axial direction in the inner hole of the support steel pipe. The reinforcing pipe divides the grouting channel into at least a central grouting channel and an edge grouting channel. The central grouting channel connects the grouting end and the grout outlet end of the support steel pipe, and the edge grouting channel connects the grouting end and the overflow hole of the support steel pipe.

[0017] The beneficial effects of the embodiments of the present invention are:

[0018] The press-fit pipe roof support structure provided in this embodiment of the invention uses multiple sliders slidably arranged on a steel arch frame with an arched section. Each slider is equipped with a support steel pipe, which allows all the support steel pipes to be relatively concentrated or relatively dispersed. This can be used to deal with the situation where the inner surface of the tunnel is severely or uniformly subsided. When one side of the inner surface of the tunnel is pressed down or is relatively severely subsided, the support can be adjusted to lift one end of the steel arch frame, thereby achieving the purpose of more concentrated support on the severely subsided side and thus forming a sufficient support effect.

[0019] Overall, the press-fit pipe roof support structure provided by the embodiments of the present invention is relatively flexible in adjustment and has sufficient support force. It can also cope with uniform or non-uniform subsidence and is suitable for a wider range of scenarios. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the press-fit pipe roof support structure provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection between the steel arch frame and the adjusting bracket provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the steel arch frame provided in an embodiment of the present invention;

[0024] Figure 4 This is a structural schematic diagram of the cross-section of the support steel pipe provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the support steel pipe provided in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the first tube and the second tube provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the reinforcing tube provided in an embodiment of the present invention;

[0028] Figure 8 A perspective view of the reinforcing tube provided in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the connection component provided in an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the adjustment bracket provided in an embodiment of the present invention;

[0031] Figure 11 This is a cross-sectional structural diagram of the adjustment bracket provided in an embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of the lifting mechanism in its deployed state according to an embodiment of the present invention. Figure 1 ;

[0033] Figure 13 This is a schematic diagram of the lifting mechanism in its deployed state according to an embodiment of the present invention. Figure 2 ;

[0034] Figure 14 This is a cross-sectional structural diagram of the lifting mechanism in its unfolded state according to an embodiment of the present invention;

[0035] Figure 15 This is a schematic diagram of the support frame provided in an embodiment of the present invention;

[0036] Figure 16 This is a schematic diagram of the structure of the support column provided in an embodiment of the present invention;

[0037] Figure 17 This is a schematic diagram of the structure of the first limiting member provided in an embodiment of the present invention;

[0038] Figure 18 This is a schematic diagram of the support rod provided in an embodiment of the present invention;

[0039] Figure 19 This is a schematic diagram of the cross-section of the rod provided in an embodiment of the present invention;

[0040] Figure 20 A perspective view of the support column provided in an embodiment of the present invention;

[0041] Figure 21 for Figure 11 An enlarged schematic diagram of point A on the adjustment bracket shown.

[0042] Icons: 100-Pipe roof structure; 110-Steel arch frame; 111-Slide rail; 113-Positioning groove; 130-Support steel pipe; 131-Overflow hole; 133-Grouting end; 135-Conical block; 137-First pipe body; 139-Second pipe body; 150-Reinforcing pipe; 151-Retaining ring; 300-Connecting assembly; 310-Slider; 311-Fastening screw; 330-Guide pipe; 331-Positioning screw; 500-Support frame; 501- Installation part; 503-Locking part; 700-Lifting mechanism; 710-Screw rod; 711-Handwheel; 713-Threaded sleeve; 730-Support column; 731-Limiting groove; 733-Compression spring; 735-Positioning column; 750-Support rod; 751-Rod body; 753-Sliding sleeve; 755-Card groove; 770-First limiting part; 771-Gear part; 773-First spring; 790-Second limiting part; 791-Card block; 793-Second spring. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0044] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Furthermore, the terms "parallel" and "perpendicular" do not imply that components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be perfectly parallel, but that it can be slightly tilted.

[0048] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Example

[0051] Please see Figures 1-3 This embodiment provides a press-fit pipe roof support structure including a steel arch frame 110, an adjusting bracket, and multiple support steel pipes 130. The steel arch frame 110 has an arched portion capable of forming an arc support, meaning that part of the steel arch frame 110 forms an arched portion to adapt to the arc shape of the tunnel inner wall. Multiple sliders 310 are slidably disposed on this arched portion. These sliders 310 can slide close together or separate along the arc direction of the arch, meaning that each slider 310 can slide back and forth along the arc direction of the arch, thereby forming a concentrated approach or spaced separation between them to cope with support situations where the tunnel inner surface sags uniformly or concentrates on a certain side.

[0052] Each support steel pipe 130 is detachably connected to the slider 310, and the axial direction of the support steel pipe 130 is at an angle to the sliding plane of the slider 310. This means that the sliding plane is formed by the reciprocating sliding range of the slider 310, and the axial direction of the support steel pipe 130 is not located in the sliding plane, but forms a certain angle, so that the support steel pipe 130 can cope with the axial support of the tunnel. That is, the steel arch frame 110 and multiple support steel pipes 130 form a pipe roof structure 100 to provide support between the inner surface of the tunnel and the foundation surface. The steel arch frame 110 forms vertical support, and the support steel pipes 130 form horizontal support, so as to facilitate the formation of a stable grouting structure in the later stage.

[0053] The adjusting bracket has an interconnected support portion and a telescopic portion. The telescopic portion is connected to both ends of the arch and is used to adjust the relative height of the ends of the arch individually or simultaneously. The adjustment direction of the ends of the arch is coplanar with the sliding plane of the slider, indicating that the adjusting bracket is used to at least adjust the height of the steel arch 110 in the vertical direction. When the adjusting bracket adjusts both ends of the arch simultaneously, the steel arch 110 rises or falls synchronously, which can cope with uniform sag to form a shape-matched and fully supported form. When the adjusting bracket adjusts only one end of the arch, the adjusted end of the steel arch 110 rises or falls at an angle to cope with relatively severe sag on one side, thus forming an angled concentrated support form.

[0054] The above technical solutions are more flexible than fixed pipe roof structures and can cope with concentrated support on one side; compared with simple sliding pipe roof structures, the support is more comprehensive. By adjusting the support height vertically or tilting, it can form a more comprehensive and concentrated support with the support at the landing point.

[0055] In some embodiments, the support steel pipe 130 is slidably connected to the slider 310, allowing the support steel pipe 130 to slide relative to the slider 310 along its axial direction, thereby achieving adjustment of the horizontal support length and position. The slider 310 is equipped with fasteners for locking the sliding position of the support steel pipe 130. Specifically, the support steel pipe 130 and the slider 310 are slidably connected, for example, through a connecting assembly 300. See also... Figure 9 The connecting assembly 300 forms a guide tube 330 and a slider 310. The guide tube 330 and the slider 310 are fixedly connected. A slide rail 111 (the shape of the slide rail 111 is similar to the shape of the arch) is provided on one side of the steel arch frame 110. The slider 310 is slidably engaged with the surface of the slide rail 111. A fastening screw 311 is threaded onto the surface of the slider 310. The fastening end of the fastening screw 311 passes through the slider 310 and can lock itself onto the surface of the slide rail 111. The support steel pipe 130 is slidably inserted into the guide tube 330, restricting the radial movement of the support steel pipe 130 and increasing the stability during the support process. A positioning screw 331 is provided on the surface of the guide tube 330 as a fastener. The fastening end of the positioning screw 331 passes through the guide tube 330 and can lock itself onto the surface of the support steel pipe 130, thereby achieving the purpose of adjusting and determining the horizontal relative position of the support steel pipe 130.

[0056] In some embodiments, in order to further adjust the horizontal posture of the support steel pipe 130 to facilitate grouting operations, the support steel pipe 130 includes a first pipe body 137 and a second pipe body 139 that are telescopically connected. The purpose of adjusting the telescopically is to achieve different horizontal postures of the support steel pipe 130. The telescopic connection here is, for example, a sliding connection or a threaded connection. Taking the threaded connection as an example, one end of the first pipe body 137 is provided with an external thread, and the inner wall of one end of the second pipe body 139 is provided with an internal thread that matches the external thread.

[0057] In some implementations, please refer to Figures 4-8 The inner cavity of the support steel pipe 130 forms a grouting channel. A reinforcing pipe 150 is arranged axially within the inner hole of the support steel pipe 130. The reinforcing pipe 150 is located within the grouting channel. Due to the limited structural strength of the support steel pipe 130, the maximum load it can withstand has an upper limit. However, the pressure exerted by the surrounding mountain on the pipe roof structure 100 is significant, easily causing the support steel pipe 130 to bend, deform, or even break, affecting the safety of tunnel excavation. Therefore, a reinforcing pipe 150 is installed inside the support steel pipe 130. The reinforcing pipe 150 is arranged axially (lengthwise) along the support steel pipe 130, and its side is connected to the inner wall of the support steel pipe 130 (e.g., by fixed welding). Through this technical solution, the axially arranged reinforcing pipe 150 inside the support steel pipe 130 serves as a reinforcing structure, improving the structural strength of the support steel pipe 130 and thus increasing its maximum load. This makes the pipe roof support less prone to deformation under pressure, thereby increasing the structural stability of the support.

[0058] Based on the above scheme, the reinforcing pipe 150 divides the grouting channel into at least a central grouting channel and an edge grouting channel. The central grouting channel connects the grouting end 133 (e.g., made of stainless steel or plastic such as PC, ABS, PP, PET, or polyethylene terephthalate) and the grout outlet end of the support steel pipe 130. The edge grouting channel connects the overflow hole 131 of the grouting end 133 of the support steel pipe 130. Specifically, the reinforcing pipe 150 is prismatic, with its edges connected to the inner wall of the supporting steel pipe 130, thereby forming multiple edge grouting channels. Its center is a cavity, forming a central grouting channel. One end of both the edge grouting channel and the central grouting channel is connected to the grouting end 133. The other end of the edge grouting channel is an overflow hole 131 formed on the wall of the supporting steel pipe 130. In this embodiment, several overflow holes 131 are spaced apart on the surface of the supporting steel pipe 130, and the several overflow holes 131 are arranged in an array, thereby creating multiple edge grouting channels. External grout is injected into the edge grouting channels through the grouting end 133, and the grout is discharged from the overflow hole 131 through the edge grouting channels. The grout fills the gaps and improves the strength of the support structure.

[0059] The other end of the central grouting channel is formed at the end of the conical block 135 (used for embedding into the tunnel structural layer) of the support steel pipe 130. During pressurized grouting into the support steel pipe 130, the position of the support steel pipe 130 remains stable. External grout is injected into the central grouting channel through the grouting end 133. The grout is discharged from the outlet end through the central grouting channel, filling gaps and improving the strength of the support structure. Through this technical solution, the independent division of different grouting channels is achieved (generally, the central grouting channel has a larger grouting volume), while also enabling the support steel pipe 130 to have a higher strength support effect and greater applicability.

[0060] In a specific embodiment, the reinforcing pipe 150 is, for example, a hollow triangular prism. The reinforcing pipe 150 is welded from at least three plate-shaped reinforcing steel plates. The surface of the supporting steel pipe 130 is coated with a chrome layer, and the surface of the reinforcing pipe 150 is also coated with a chrome layer. Furthermore, a retaining ring 151 is fixed to the surface of the reinforcing pipe 150. The retaining ring 151 is located at one end near the grouting end 133. The inner wall of the retaining ring 151 is sealed to the outer wall of the reinforcing pipe 150, and the outer wall of the retaining ring 151 is sealed to the inner wall of the supporting steel pipe 130. Vent holes are provided on the surface of the retaining ring 151 to prevent grout backflow while ensuring a relatively balanced air pressure.

[0061] In one specific embodiment, the outer diameter of the support steel pipe 130 is 114 mm, the wall thickness is 6 mm, and the overflow holes 131 on the outer wall of the support steel pipe 130 are distributed in a quincunx pattern; the diameter of the overflow holes 131 is 6 mm. Furthermore, the length of the first pipe body 137 is different from the length of the second pipe body 139, and the first pipe body 137 and the second pipe body 139 used for splicing adjacent support steel pipes 130 are staggered, so that the joints on adjacent support steel pipes 130 are arranged in an alternating manner to accommodate more horizontal position adjustment scenarios. In other embodiments, a reinforcing cage may also be provided inside the support steel pipe 130. The reinforcing cage includes a reinforcing ring composed of 2-6 reinforcing bars (18 mm in diameter) and several fixing rings (short sections 3-5 cm in length, with a spacing of 1.5 m between the fixing rings). The reinforcing ring is placed on the inner wall of the support steel pipe 130, and the fixing rings are welded to the inner ring of the reinforcing ring.

[0062] It should be noted that, in order to ensure adaptation to the tunnel inner surface described in this embodiment, in this embodiment, the axial direction of the support steel pipe 130 is perpendicular to the sliding plane of the slider 310, and the adjustment direction of the arch end is perpendicular to the axial direction of the support steel pipe 130, so as to cope with tunnel support scenarios under normal circumstances and achieve a sufficient and matching support form.

[0063] In some implementations, please refer to Figure 10 and Figure 11The adjusting bracket includes a support frame 500 and a lifting mechanism 700 mounted on the support frame 500. The bottom of the support frame 500 forms a mounting part 501 (e.g., a mounting hole for a mounting base, intended to provide stable support to the foundation). The positioning end of the lifting mechanism 700 is connected to the support frame 500 to provide stable support for the lifting mechanism 700. The telescopic end of the lifting mechanism 700 forms a hinge with a limit with the end of the arch. Here, the hinge with a limit means that a certain angle is formed in the hinge direction to prevent excessive rotation of the hinge. For example, a flat hinge can be used, and the hinge angle can be within ±60°.

[0064] By configuring lifting mechanisms 700 at both ends of the arch, selective or simultaneous lifting control at both ends can be achieved, thus realizing the aforementioned centralized support with inclined lifting or uniform support with overall synchronous lifting. In this embodiment, to ensure convenient adjustment of the lifting mechanism 700 and stable support, please refer to [reference needed]. Figures 10-14 The lifting mechanism 700 includes a lead screw 710, a threaded sleeve 713, and a support column 730. The lead screw 710 is rotatably connected to the support frame 500, for example, by means of a bearing assembly, which connects its upper and lower ends to the support frame 500. The threaded sleeve 713 is threaded onto the lead screw 710, meaning that the threaded sleeve 713 is fitted onto the lead screw 710 and forms a threaded connection, allowing relative rotation between the two.

[0065] Please see Figure 15 and Figure 16The support column 730 is connected to the threaded sleeve 713, allowing the support column 730 to move with the threaded sleeve 713. By rotating the lead screw 710 through the handwheel 711 fixed to one end of the lead screw 710, the threaded sleeve 713 reciprocates along the axial direction of the lead screw 710 (vertical direction) (the locking nut screwed to one end of the lead screw 710 can lock the lead screw 710 to prevent misoperation or radial rotation due to external force), thereby driving the support column 730 to extend and retract via the threaded sleeve 713. Furthermore, the support column 730 is formed with a positioning column 735, for example, formed at the top of the support column 730; the arch end is formed with a positioning groove 113, the groove wall of the positioning groove 113 and the outer wall of the positioning column 735 forming a gap, so that the positioning column 735 can rotate or tilt relative to the positioning groove 113. That is, the gap allows the positioning column 735 to rotate axially within the positioning groove 113, thereby better realizing the adjustment function of the support frame 500. At the same time, the gap allows the positioning column 735 to deviate from its axial direction within the positioning groove 113, thereby allowing the steel arch frame 110 to deflect relative to the support frame 500 to adapt to the situation of concentrated and offset support, that is, to realize the above-mentioned hinged form with limit. It should be noted that, in this embodiment, the gap allows the positioning column 735 to deflect within 60° relative to the axial direction of the positioning groove 113, which can not only cope with most offset support situations, but also ensure the support effect.

[0066] In some implementations, considering that the inner surface of the tunnel is not perfectly parallel to the foundation surface, especially when the foundation surface is uneven or the inner surface of the tunnel is uneven or inclined, the entire support structure needs to be raised or lowered in both the radial and axial directions of the tunnel to accommodate the different unevenness of the foundation surface or the inner surface of the tunnel. Please refer again. Figures 12-14 One end of the support column 730 is hinged to the threaded sleeve 713, and the other end of the support column 730 is hinged to the support rod 750. The support rod 750, when hinged open, can support the support column 730 when hinged open. That is, the support rod 750 and the support column 730 form a "V" shaped support, thereby using the form of triangular support to form stable support. For example, the lower end of the support rod 750 forms support with the foundation surface, and the lower end of the support column 730 is supported on the support frame 500 via the threaded sleeve 713. At this time, the upper end of the support column 730 and the upper end of the support rod 750 form an angle, so that the steel arch frame 110 on the positioning column 735 can be offset relative to the support frame 500 in the tunnel axial direction to form support for different concave and convex forms of the foundation surface or the inner surface of the tunnel.

[0067] The support frame 500 is equipped with a locking member 503 for keeping the support column 730 in a hinged closed state. This means the locking member 503 is used to lock the support column 730 when it is hinged closed, and unlocks it when the support column 730 needs to be hinged open. Specifically, a limiting groove 731 is formed on the side wall of the support column 730, arranged along the length of the support column 730. The locking member 503 (e.g., a limiting screw) passes through the support frame 500 and can slide within the limiting groove 731 (in the initial state). Thus, in the initial hinged closed state, the limiting screw prevents the support column 730 from hinged open and allows the support column 730 to slide relative to the support frame 500. When the limiting screw is released and disengaged from the limiting groove 731, the support column 730 rotates in the tunnel axial direction, thereby forming a V-shaped support using the support rod 750. Through the above technical solutions, the support frame 500 can be easily adjusted to adjust the support angle, providing the necessary conditions for the steel arch frame 110 that needs to be installed at an angle or at an inclination. By hinged support rod 750 at the upper end of support column 730, support column 730 is achieved, further enhancing stability, reducing safety hazards, and greatly improving the applicability to uneven foundations.

[0068] Based on the above scheme, in order to achieve a more sufficient supporting effect between the support rod 750 and the foundation surface, please refer to... Figures 17-19 The support rod 750 includes a telescopically connected rod body 751 and a sliding sleeve 753. The rod body 751 is hinged to the support column 730, and the sliding sleeve 753 is used to form support with the foundation surface. The telescopic connection can be a sliding connection, a threaded connection, an elastic connection, etc., to adjust the relative distance between the rod body 751 and the sliding sleeve 753, thereby obtaining a suitable length for sufficient support. In this embodiment, a sliding connection is used as an example. The sliding sleeve 753 is provided with a first limiting member 770 for locking the relative sliding position of the rod body 751, so as to achieve a stable connection after the relative movement of the rod body 751 and the sliding sleeve 753.

[0069] The first limiting member 770 includes a tooth 771 and a first spring 773. The tooth 771 is slidably engaged in a groove on the surface of the rod 751. By pressing the tooth 771 to slide, the tooth 771 is separated from the groove of the sliding sleeve 753, which can push the sliding sleeve 753 to slide on the surface of the rod 751 for extension and retraction adjustment. After releasing, the tooth 771 slides under the elastic force of the first spring 773 and engages with the groove, thereby achieving the purpose of fixing and locking the sliding sleeve 753 on the surface of the rod 751.

[0070] To ensure a stable fit between the support rod 750 and the support column 730, especially when the support rod 750 is not used for foundation support, please refer to [the relevant documentation]. Figure 11 , Figure 14 , Figure 18 , Figure 20 as well as Figure 21 The support column 730 has a receiving groove on one side for accommodating the support rod 750. A second limiting member 790 is provided on the side of the receiving groove away from the hinged end of the support rod 750. The second limiting member 790 is used to movably engage the free end of the support rod 750, facilitating folding and storage of the support rod 750, as well as easy carrying and storage. Specifically, a compression spring 733 is fixed at the bottom of the receiving groove. When the support rod 750 is folded and stored, it compresses the compression spring 733, and simultaneously, the second limiting member 790 engages with the support rod 750 to form a stable storage arrangement. Furthermore, by controlling the second limiting member 790 to release the engagement with the support rod 750, the support rod 750 automatically pops out under the elastic force of the compression spring 733, facilitating operation and use.

[0071] The second limiting member 790 includes a locking block 791 and a second spring 793. A stepped groove is provided at the bottom of the support column 730. The locking block 791 slides and engages within the stepped groove, and the second spring 793 is fixed between the locking block 791 and the bottom wall of the stepped groove. A push plate is provided on the outer surface of the support column 730. Pushing the push plate moves the locking block 791, separating the lower end of the locking block 791 from the slot 755 at the lower end of the support rod 750. After release, the locking block 791 resets under the elastic force of the second spring 793 and can re-engage with the slot 755, thus achieving the purpose of flexibly locking and unlocking the sliding sleeve 753 of the support rod 750.

[0072] In summary, the press-fit pipe roof support structure provided by the embodiments of the present invention has an ingenious structural design, flexible application methods, and a wider range of applicable scenarios. It can cope with different settlement or subsidence conditions and different foundation flatness conditions to carry out stable, sufficient and concentrated support operations.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes have been omitted to avoid unnecessarily limiting the invention.

Claims

1. A press-fit pipe roof support structure, characterized in that, include: A steel arch frame, wherein the steel arch frame has an arch portion capable of forming an arc support, and a plurality of sliders are slidably disposed on the arch portion, the plurality of sliders being able to slide close together or separate from each other along the arc direction of the arch portion; Multiple support steel pipes, each of which is detachably connected to the slider, and the axial direction of the support steel pipe is at an angle to the sliding plane of the slider; An adjusting bracket has a support part and a telescopic part that are connected to each other. The telescopic part is connected to both ends of the arch and is used to adjust the relative height of the ends of the arch individually or simultaneously. The adjustment direction of the end of the arch is coplanar with the sliding plane of the slider; The adjusting bracket includes a support frame and a lifting mechanism mounted on the support frame. The bottom of the support frame forms a mounting part. The positioning end of the lifting mechanism is connected to the support frame. The telescopic end of the lifting mechanism forms a hinge with a limit with the end of the arch. The lifting mechanism includes a lead screw, a threaded sleeve, and a support column. The lead screw is rotatably connected to the support frame, and the threaded sleeve is threaded onto the lead screw. One end of the support column is hinged to the threaded sleeve. Rotating the lead screw causes the support column to extend and retract via the threaded sleeve; the support column is formed with a positioning column, and the end of the arch is formed with a positioning groove. The groove wall of the positioning groove and the outer wall of the positioning column form a gap, so that the positioning column can rotate or tilt relative to the positioning groove.

2. The press-fit pipe roof support structure according to claim 1, characterized in that, The axial direction of the support steel pipe is perpendicular to the sliding plane of the slider, and the adjustment direction of the arch end is perpendicular to the axial direction of the support steel pipe.

3. The press-fit pipe roof support structure according to claim 1, characterized in that, The other end of the support column is hinged to a support rod, which, when the hinge is open, can support the support column; the support frame is provided with a locking element for keeping the support column in a hinged closed state.

4. The press-fit pipe roof support structure according to claim 3, characterized in that, The support rod includes a telescopically connected rod body and a sliding sleeve. The rod body is hinged to the support column, and the sliding sleeve is provided with a first limiting member for locking the relative sliding position of the rod body.

5. The press-fit pipe roof support structure according to claim 3, characterized in that, The support column has a receiving groove on one side for accommodating the support rod. A second limiting member is provided on the side of the receiving groove away from the hinge end of the support rod. The second limiting member is used to movably engage the free end of the support rod.

6. The press-fit pipe roof support structure according to claim 1, characterized in that, The support steel pipe is slidably connected to the slider so that the support steel pipe can slide relative to the slider along its axial direction. The slider is provided with fasteners for locking the sliding position of the support steel pipe.

7. The press-fit pipe roof support structure according to claim 6, characterized in that, The support steel pipe includes a first pipe body and a second pipe body that are telescopically connected.

8. The press-fit pipe roof support structure according to claim 6, characterized in that, The inner cavity of the support steel pipe forms a grouting channel, and the inner hole of the support steel pipe is equipped with a reinforcing pipe arranged along its axial direction. The reinforcing pipe divides the grouting channel into at least a central grouting channel and an edge grouting channel. The central grouting channel connects the grouting end and the grout outlet end of the support steel pipe, and the edge grouting channel connects the grouting end of the support steel pipe with the overflow hole.

Images