Corrugated plate tunnel initial support structure and tunnel

Abstract

The present invention relates to the field of tunnel construction, and specifically to a corrugated plate tunnel initial support structure and a tunnel. The corrugated plate tunnel initial support structure includes channel support, a horse head gate combined ring beam and an end wall; the channel support is cylindrical, and the horse head gate combined ring beam and the end wall are respectively at the two ends of the channel support; the channel support includes a corrugated plate and a first ring beam, and a plurality of corrugated plates are sequentially connected to form an annular support belt ring, and adjacent support belt rings are connected by the first ring beam; the horse head gate combined ring beam includes an I-beam and a steel plate, and the I-beam is welded by a first steel plate and a second steel plate to form a combined beam, and a plurality of combined beams are sequentially connected by a second steel plate to form a frame beam-column system; the end wall includes a first profile and a second profile that are detachably connected, a plurality of first profiles are arranged in parallel, a plurality of second profiles are arranged vertically, and the first profile and the second profile are arranged crosswise to form a main wall frame of a mesh structure. The present invention simplifies the operation process and operation time in the tunnel.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, and in particular to an initial support structure of a corrugated plate tunnel and a tunnel. Background Art

[0002] When constructing tunnels in urban underground projects, in order to close the excavation surface as early as possible and effectively reduce surface settlement, initial support devices with greater rigidity should be erected as soon as possible after soil excavation.

[0003] At present, the initial support method of spraying and anchoring is adopted in the construction of subway section tunnels by mining method, that is, the spraying layer, anchor rods and surrounding rock together form a ring-shaped bearing structure, bear the pressure of the surrounding rock, and form an initial support structure. This type of initial support device is a steel grid formed by welding multiple steel bars or a steel grid structure formed by bending steel sections. In the initial support device of the prior art, each ring of the steel grid steel frame is assembled from several grid units of different shapes. Each frame of the steel grid is welded by main bars, reinforcing bars and connecting angle steels (forming end plates), and high-strength bolts are used to connect the units. In actual application, the steel grid after lofting will be adjusted and connected according to the pre-designed positions of each unit, and the system anchor rods will be driven into the soil to fix the grid position when the grid is erected. When the system anchor rods are not set, the steel grid can also be positioned by locking foot anchor rods. After the above-mentioned grid is erected, concrete is sprayed in layers as soon as possible to form a composite force-bearing structure of steel grid and sprayed concrete.

[0004] However, the initial support device used in the prior art for underground engineering generally takes a long time to install, because the entire construction process of the initial lining structure of the underground engineering includes the transportation, installation, connection, and adjustment of the grid steel frame, as well as the material preparation of concrete, air compression equipment, transportation pipelines, and spraying assembly. Therefore, it is difficult to truly realize the "quick closure" principle of tunnel excavation support. Summary of the invention

[0005] The object of the present invention is to provide a corrugated plate tunnel initial support structure and a tunnel, so as to solve the above-mentioned technical problems.

[0006] The embodiment of the present invention is achieved as follows:

[0007] A corrugated plate tunnel initial support structure, comprising a channel support, a horse head gate combined ring beam and an end-sealing wall;

[0008] The channel support is cylindrical, the horse head door composite ring beam is arranged at one end of the channel support, and is used to strengthen the structure after the channel is opened, and the end-blocking wall is arranged at one end of the channel support, and is used to block one end of the channel support;

[0009] The channel support comprises a corrugated plate and a first annular beam, a plurality of the corrugated plates are sequentially connected to form an annular support belt ring, and adjacent support belt rings are connected by the first annular beam;

[0010] The horse head door composite ring beam comprises an I-beam and a steel plate, the I-beam is welded through a first steel plate and a second steel plate to form a composite beam, and a plurality of composite beams are sequentially connected through the second steel plate to form a frame beam-column system;

[0011] The end-sealed wall includes a first profile and a second profile that are detachably connected, a plurality of the first profiles are arranged in parallel, a plurality of the second profiles are arranged vertically, and the first profiles and the second profiles are arranged crosswise to form a main wall frame with a mesh structure.

[0012] In a preferred embodiment of the present invention, the second profile is arranged through the first profile;

[0013] Alternatively, the second profile is arranged on one side of the first profile.

[0014] In a preferred embodiment of the present invention, the first profile is a channel steel or an I-beam, and the second profile is a steel bar.

[0015] In a preferred embodiment of the present invention, concrete is poured on the main wall frame.

[0016] In a preferred embodiment of the present invention, the surface of the corrugated plate is sprayed with asphalt, hot-dip galvanizing and / or hot-dip aluminum.

[0017] In a preferred embodiment of the present invention, a first mounting end plate and a second mounting end plate are provided on the corrugated plate;

[0018] The first mounting end plates are arranged at a pair of opposite ends of the corrugated plate, and are used to mount the corrugated plate on the first annular beam;

[0019] The second mounting end plates are arranged at the other pair of opposite ends of the corrugated plates and are used to connect adjacent corrugated plates together.

[0020] In a preferred embodiment of the present invention, a hand hole is provided on the first annular beam to facilitate the installation of the first annular beam.

[0021] In a preferred embodiment of the present invention, a waterproof rubber pad is provided between the first mounting end plate and the first annular beam, and between the two second mounting end plates.

[0022] In a preferred embodiment of the present invention, the first annular beam is coaxial with the supporting belt ring.

[0023] A tunnel comprises the corrugated plate tunnel initial support structure described in any one of the above items.

[0024] The beneficial effects of the embodiments of the present invention are:

[0025] The initial support structure system with corrugated plates as the main load-bearing components increases the radial stiffness of the structure; the corrugated plates, the first annular beam, the first profile and the second profile are all prefabricated parts, and their welding and hole-punching operations are all completed in the factory, which is more conducive to product quality control and can effectively reduce problems such as long adjustment time in the hole and difficult splicing of bolt holes caused by component accuracy problems. The main load-bearing components adopt a full splicing process, which simplifies the operation procedures and operation time in the hole, and truly realizes the "quick closure" principle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the structure of the initial support structure of a corrugated plate tunnel provided by an embodiment of the present invention;

[0028] Figure 2 for Figure 1 AA section view;

[0029] Figure 3 for Figure 2 A partial enlarged view of point B;

[0030] Figure 4 A schematic structural diagram of a channel support of a corrugated plate tunnel initial support structure provided by an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the position of the hand hole on the annular beam of the corrugated plate tunnel initial support structure provided by an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the installation of a linear waterproof rubber pad of a corrugated plate tunnel initial support structure provided by an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the installation of a ring-shaped waterproof rubber pad of the initial support structure of a corrugated plate tunnel provided by an embodiment of the present invention;

[0034] Figure 8 A schematic structural diagram of a horse head gate composite ring beam of a corrugated plate tunnel initial support structure provided by an embodiment of the present invention;

[0035] Fig. 9A schematic diagram of the connection of the composite beams of the initial support structure of the corrugated plate tunnel provided by an embodiment of the present invention;

[0036] Fig.10 A schematic diagram of the reinforcement structure of the horse head gate composite ring beam of the corrugated plate tunnel initial support structure provided by an embodiment of the present invention;

[0037] Fig.11 for Fig.10 Side view of

[0038] Fig.12 A schematic structural diagram of a steel support for a corrugated plate tunnel initial support structure provided by an embodiment of the present invention;

[0039] Fig.13 A schematic structural diagram of an adjustment device for a corrugated plate tunnel initial support structure provided by an embodiment of the present invention;

[0040] Fig.14 A reference diagram of the usage status of the steel support of the corrugated plate tunnel initial support structure provided in an embodiment of the present invention.

[0041] In the figure:

[0042] 1: channel support; 2: end wall; 3: first profile; 4: second profile; 5: concrete; 6: corrugated plate; 7: first annular beam; 8: first mounting end plate; 9: second mounting end plate; 10: second annular beam; 11: first mounting hole; 12: fixing hole; 13: second mounting hole; 14: hand hole; 15: waterproof rubber pad; 16: I-beam; 17: first steel plate; 18: second steel plate; 19: connecting hole; 20: third steel plate; 21: rib plate; 22: rubber pad; 23: adjustment device; 24: longitudinal support; 25: transverse support; 26: core soil; 27: upper plate; 28: fixing rod; 29: fixing sleeve; 30: lower plate; 31: lower adjustment rod; 32: adjustment sleeve; 33: upper adjustment rod; 34: rotary hoop; 35: steel support. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] 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, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The following is combined with Figure 1-Figure 5 , some embodiments of the present invention are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0050] A corrugated plate tunnel initial support structure, which includes a channel support 1, a horse head gate combined ring beam and an end wall 2; the channel support 1 is cylindrical, the horse head gate combined ring beam is arranged at one end of the channel support, and is used to strengthen the structure after the channel is opened, and the end wall 2 is arranged at one end of the channel support 1, and is used to block one end of the channel support 1; the channel support 1 includes a corrugated plate 6 and a first ring beam 7, and a plurality of corrugated plates 6 are connected in sequence to form an annular support belt ring, and adjacent support belt rings are connected by the first ring beam 7; the horse head gate combined ring beam includes an I-beam and a steel plate, the I-beam is welded by a first steel plate 17 and a second steel plate 18 to form a combined beam, and a plurality of combined beams are connected in sequence by the second steel plate 18 to form a frame beam-column system; the end wall 2 includes a first profile 3 and a second profile 4 that can be detachably connected, a plurality of first profiles 3 are arranged in parallel, a plurality of second profiles 4 are arranged vertically, and the first profile 3 and the second profile 4 are arranged crosswise to form a main wall frame of a mesh structure.

[0051] Specifically, in this embodiment, the end wall 2 and the channel support 1 are fixedly connected by a second annular beam 10. Specifically, a plurality of second annular beams 10 are arranged side by side, the channel support 1 is fixedly connected to the second annular beam 10 by bolts, and the end wall 2 is fixedly connected to the inner wall of the second annular beam 10.

[0052] In this embodiment, the corrugated plate 6, the first ring beam 7, the first profile 3 and the second profile 4 are prefabricated in the factory and then transported to the construction site. The corrugated plate 6 and the first ring beam 7 are spliced ​​into the channel support 1 by riveting, bolting or welding, and the first profile 3 and the second profile 4 are spliced ​​into a grid-like main wall frame by riveting, bolting or welding, and the end wall 2 is formed by the main wall frame.

[0053] Specifically, in this embodiment, the first annular beam 7 is made of steel. More specifically, the first annular beam 7 is a steel pipe with a square cross section.

[0054] Specifically, the first profile 3 is arranged horizontally, and the second profile 4 is arranged vertically.

[0055] It should be pointed out that in the present embodiment, the first profile 3 and the second profile 4 are respectively arranged horizontally and vertically, but it is not limited to such an arrangement. For example, the first profile 3 and the second profile 4 may both be arranged to be inclined, or one of them may be arranged to be inclined, etc. In other words, as long as the supporting strength of the main wall frame is improved through a cross arrangement, it will suffice.

[0056] In this embodiment, the initial support structure system with the corrugated plate 6 as the main load-bearing member has a unique structural advantage. Its axial and radial bidirectional load-bearing increases the radial stiffness of the structure. The longitudinal corrugations can also play a displacement compensation effect and better adapt to the uneven deformation of the surrounding rock. Especially for underground tunnels, the greater surrounding rock deformation can give play to the advantages of the annular and longitudinal bidirectional load-bearing of the corrugated plate 6, disperse the load effect of the vertical earth pressure, and the overall flexible load-bearing greatly improves the seismic resistance and fatigue performance of the structure, so that the isotropic characteristics of the steel can be fully utilized. When using the above-mentioned corrugated plate 6 initial support structure, it can be adjusted to a cross-sectional type of different cross-sectional forms according to the characteristics of the stratum and the use requirements, such as horseshoe, pear, tubular, box, circular, etc.

[0057] In addition, since the corrugated plate 6, the first annular beam 7, and the channel steel in the present invention are all prefabricated in the factory, and the welding and hole-making operations are all completed in the factory, it is more conducive to product quality control, and can effectively reduce the problems of long adjustment time in the hole and difficult splicing of bolt holes caused by component accuracy problems. The main load-bearing components adopt a full splicing process, which simplifies the operation procedures and operation time in the hole, and truly realizes the "quick closure" principle, thereby reducing the impact on the surrounding buildings and surface settlement, and the splicing work is convenient for later recycling and reuse, thereby reducing the project cost. In addition, the steel structure itself has good water-tightness, and has a strong structural advantage in ensuring water-free operation of the project. Compared with the traditional "steel grille + shotcrete 5" primary support structure, this structure has many advantages and is more suitable for underground tunnel projects.

[0058] The flange plates on both sides of the I-beam 16 are welded through two to three first steel plates 17 and the ends are welded through the second steel plates 18 to form a composite beam. The composite beam is connected by high-strength bolts through the connecting holes 19 at the second steel plates 18 to form a frame beam-column system for structural reinforcement to ensure that the strength of the structure at the composite ring beam of the horse head gate of the cross passage is sufficient to withstand the surrounding rock pressure after the passage is opened.

[0059] In this embodiment, if Fig.10 and Fig.11 As shown, in order to realize layered excavation of the tunnel, angle steels are welded at the first ring beam 7 at the steps on both sides of the tunnel, and ribs 21 are arranged inside the angle steels, so that when excavating by the step method, the tunnel superstructure and covering soil can be supported by the angle steels at the steps.

[0060] The specific force transmission path is: the top plate soil pressure above the tunnel → corrugated plate → first annular beam 7 → angle steel → soil below.

[0061] Specifically, in this embodiment, the angle steel can be an angle steel profile, or it can be formed by welding two third steel plates 20 arranged horizontally and vertically together to form an angle steel structure, and then the two third steel plates 20 are connected together through ribs 21 to form a stable support.

[0062] During the internal construction of the tunnel, the step method was adopted. However, during the step method construction, since the ring beam and the corrugated plate were not ring-shaped, the stress of the structure was poor, and the top plate settlement and side wall convergence of the steel corrugation 6 required additional measures.

[0063] Therefore, in this embodiment, steel supports 35 are provided on both sides and the top of the corrugated plate. Fig.14 shown.

[0064] like Fig.12 As shown, the steel support 35 includes a transverse support 25 and a longitudinal support 24. The transverse support 25 is located on the core soil 26, and the longitudinal support 24 is erected on the transverse support 25. Rubber pads 22 are provided on both sides of the transverse support 25 and the top of the longitudinal support 25. The rubber pads 22 support the corrugated plate 6.

[0065] The steel support 35 is only used when the structure is not looped. To facilitate reuse, an adjustment device 23 is provided between the rubber pad 22 and the steel support to adjust the support length by hand-tightening.

[0066] Specifically, Fig.13 As shown, the adjusting device 23 includes an upper plate 27 , a lower plate 30 , a fixing sleeve 29 , a fixing rod 28 , an upper adjusting rod 33 , a lower adjusting rod 31 and an adjusting sleeve 32 .

[0067] The upper plate 27 and the lower plate 30 are arranged parallel to each other, a plurality of fixing rods 28 are arranged on the upper plate 27, a plurality of fixing sleeves 29 are arranged on the lower plate 30, and the fixing sleeves 29 are sleeved on the fixing rods 28; the upper adjusting rod 33 is fixedly arranged on the upper plate 27, and the lower adjusting rod 31 is fixedly arranged on the lower plate 30. The upper end of the adjusting sleeve 32 is threadedly connected to the upper adjusting rod 33, and the lower end of the adjusting sleeve 32 is rotatably connected to the lower adjusting rod 31. The spacing between the upper plate 27 and the lower plate 30 is adjusted by means of a threaded screw, so that the disassembly and fixation of the steel support can be facilitated, and reusability can be achieved.

[0068] More specifically, a rotary hoop 34 is provided on the lower adjusting rod 31 . The rotary hoop 34 is protruding on the outside and a steel ball is provided on the rotary hoop 34 , which not only ensures the rotation effect of the adjusting sleeve 32 , but also enables axial positioning of the adjusting sleeve 32 .

[0069] In a preferred embodiment of the present invention, the second profile 4 is disposed through the first profile 3 .

[0070] Specifically, in this embodiment, when the cross-sectional area of ​​the second profile 4 is smaller than the cross-sectional area of ​​the first profile 3, a hole is opened on the first profile 3 so that the second profile 4 passes through the hole on the first profile 3, so that only one second profile 4 can be used on the same vertical line, thereby ensuring the strength of the second profile 4.

[0071] More specifically, in this embodiment, after the second profile 4 passes through the opening of the first profile 3, welding is performed at the connection position between the first profile 3 and the second profile 4 to ensure the connection strength and connection stability between the first profile 3 and the second profile 4.

[0072] In another preferred embodiment of the present invention, the second profile 4 is arranged on one side of the first profile 3 .

[0073] That is, in this embodiment, multiple first profiles 3 are arranged in parallel to form a plane, multiple second profiles 4 are arranged vertically to form a plane, and the second profile 4 is arranged on one side of the first profile 3 and fixedly connected on one side of the first profile 3.

[0074] In this embodiment, there are many ways to fix the connection between the first profile 3 and the second profile 4, such as welding, riveting, bolt connection, binding, etc., as long as the fixed connection between the first profile 3 and the second profile 4 can be achieved.

[0075] Specifically, in a preferred embodiment of the present invention, the first profile 3 is a channel steel or an I-beam, and the second profile 4 is a steel bar.

[0076] More specifically, in this embodiment, the first profile 3 is an I-beam, wherein the left and right ends of the I-beam are welded to the inner wall of the first annular beam 7 and then abutted, and steel bars are fixed on the inner and outer sides of the I-beam by welding or the like.

[0077] It should be noted that the first profile 3 can be channel steel or I-beam, but it is not limited to channel steel or I-beam, and it can be other profiles, such as angle steel, etc. Similarly, the second profile 4 can be steel bar, but it is not limited to steel bar, and it can also be other profiles such as channel steel or angle steel. In other words, as long as it is a profile, it can be mass-produced, easy to prefabricate, and can ensure the strength of the main frame of the wall.

[0078] In a preferred embodiment of the present invention, concrete 5 is poured on the main wall frame.

[0079] In this embodiment, after pouring concrete 5 on the main frame of the wall by spraying, a complete end-capping wall 2 is formed, thereby improving the supporting effect on the tunnel and ensuring the supporting function.

[0080] In a preferred embodiment of the present invention, the surface of the corrugated plate 6 is sprayed with asphalt, hot-dip galvanizing and / or hot-dip aluminum.

[0081] Specifically, in the present embodiment, the corrugated plate 6 is formed by cold bending of a low-carbon steel plate, and its surface is sprayed with asphalt and hot-dip galvanized or hot-dip aluminum to improve the structural toughness and corrosion resistance of the corrugated plate 6 and ensure the supporting function of the corrugated plate 6 for the tunnel.

[0082] In a preferred embodiment of the present invention, a first mounting end plate 8 and a second mounting end plate 9 are provided on the corrugated plate 6; the first mounting end plate 8 is provided at a pair of opposite ends of the corrugated plate 6, and is used to mount the corrugated plate 6 on the first annular beam 7; the second mounting end plate 9 is provided at another pair of opposite ends of the corrugated plate 6, and is used to connect adjacent corrugated plates 6 together.

[0083] Specifically, in this embodiment, the corrugated plate 6 is a square plate, which is surrounded by mounting end plates for connecting to other components, wherein two first mounting end plates 8 are arranged opposite to each other and are used to fix the corrugated plate 6 to the first annular beam 7, and two second mounting end plates 9 are arranged on the other two end surfaces of the corrugated plate 6 and are used to connect adjacent corrugated plates 6.

[0084] More specifically, in the present embodiment, at least one first mounting hole 11 is provided on the first mounting end plate 8, and at least one fixing hole 12 is also provided on the first annular beam 7. The positions and numbers of the first mounting hole 11 and the fixing hole 12 are correspondingly provided. After the fixing bolts pass through the first mounting hole 11 and the fixing hole 12, the fixing nuts are used for tightening, thereby realizing the fixed connection between the first mounting end plate 8 and the first annular beam 7, and further realizing the purpose of installing the corrugated plate 6 on the first annular beam 7.

[0085] In this embodiment, at least one second mounting hole 13 is set on the second mounting end plate 9. After the side of the second mounting end plate 9 of the corrugated plate 6 abuts against the side of the second mounting end plate 9 on the adjacent corrugated plate 6, the second mounting hole 13 is set correspondingly, and the second mounting holes 13 on the two second mounting end plates 9 are passed through by fixing bolts, and then tightened with fixing nuts, thereby achieving the purpose of fixing the two adjacent corrugated plates 6.

[0086] More specifically, in this embodiment, the first mounting end plate 8 and the second mounting end plate 9 are both fixedly connected to the corrugated plate 6 by welding.

[0087] It should be pointed out that the fixed connection method of the first mounting end plate 8 on the corrugated plate 6, and the fixed connection method of the second mounting end plate 9 on the corrugated plate 6 can be the above-mentioned welding, or other fixed connection methods. The fixed connection methods can be the same or different, as long as the first mounting end plate 8 and the second mounting end plate 9 can be fixedly set on the corrugated plate 6.

[0088] In this embodiment, waterproof rubber pads 15 are provided between the first mounting end plate 8 and the first annular beam 7 and between the two second mounting end plates 9, which can ensure the sealing of the connection and further ensure that no water seepage or the like occurs in the tunnel.

[0089] The waterproof rubber pad 15 may be arranged in the following ways:

[0090] Straight line: Figure 6 As shown, it is arranged along the length direction of the first mounting end plate 8 or the second mounting end plate 9, and the length of the waterproof rubber pad 15 is the same as the length of the first mounting end plate 8 or the second mounting end plate 9, thereby isolating the opposite sides of the corrugated plate 6.

[0091] The setting position of the linear waterproof rubber pad 15 can be one end of the first mounting end plate 8 or the second mounting end plate 9 close to the corrugated plate 6, or one end away from the corrugated plate 6, or other positions, as long as it can bypass the positions of the first mounting hole 11 and the second mounting hole 13 to avoid covering the first mounting hole 11 and the second mounting hole 13.

[0092] Preferably, the waterproof rubber pad 15 is arranged on the side of the first mounting hole 11 or the second mounting hole 13 close to the corrugated plate 6 to prevent the concrete or mortar sealed by the corrugated plate 6 from leaking out of the first mounting hole 11 or the second mounting hole 13, thereby ensuring the waterproof performance.

[0093] Ring type: Figure 7 As shown, the waterproof rubber pad 15 is arranged around the outer edge of the first mounting end plate 8 or the second mounting end plate 9 to form a ring, which can be closed from all directions to ensure the waterproof effect.

[0094] In a preferred embodiment of the present invention, a hand hole 14 is provided on the first annular beam 7 to facilitate the installation of the first annular beam 7 .

[0095] In this embodiment, since the first annular beam 7 is tubular, a hand hole 14 is provided on the first annular beam 7 to facilitate passing the fixing bolt through the fixing hole 12 and achieving the purpose of tightening by the fixing nut. The setting of the hand hole 14 ensures that the fixing bolt can be inserted into the interior of the first annular beam 7.

[0096] Specifically, in this embodiment, during installation, the fixing bolt enters the interior of the first ring beam 7 from the hand hole 14, passes through the fixing hole 12 and the first installation hole 11 in turn, and then a fixing nut is used on the outside to facilitate operation. This is not only convenient for operation, but also can reduce the area of ​​the hand hole 14, thereby ensuring the strength of the first ring beam 7.

[0097] Specifically, each ring of the first annular beam 7 is provided with no less than three hand holes 14 of the first annular beam 7 , and the splicing operation of the longitudinal corrugated plate 6 bolts and the channel steel bolts is carried out in the hand holes 14 .

[0098] In a preferred embodiment of the present invention, the hand hole 14 is a circular hole or a square hole.

[0099] Specifically, in the present embodiment, the shape of the hand hole 14 is a square hole, more specifically, a rectangular hole, so as to ensure that the fixing bolt can enter the first annular beam 7 and be installed correspondingly to the fixing hole 12 .

[0100] In a preferred embodiment of the present invention, the first annular beam 7 is coaxial with the supporting belt ring.

[0101] The coaxial arrangement of the first annular beam 7 and the supporting belt ring can ensure the supporting strength of the first annular beam 7 on the supporting belt ring, thereby ensuring the supporting function of the supporting belt ring.

[0102] A tunnel comprises the corrugated plate tunnel initial support structure described in any one of the above items.

[0103] The beneficial effects of the embodiments of the present invention are:

[0104] The initial support structure system with the corrugated plate 6 as the main load-bearing component increases the radial stiffness of the structure; the corrugated plate 6, the first annular beam 7, the first profile 3 and the second profile 4 are all prefabricated parts, and their welding and hole-punching operations are all completed in the factory, which is more conducive to product quality control and can effectively reduce the problems of long adjustment time in the hole and difficult splicing of bolt holes caused by component accuracy problems. The main load-bearing components adopt a full splicing process, which simplifies the operation process and operation time in the hole, and truly realizes the "quick closure" principle.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A corrugated plate tunnel initial support structure, characterized in that: It includes channel support, horse head gate composite ring beam and end wall; The channel support is cylindrical, the horse head door composite ring beam is arranged at one end of the channel support, and is used to strengthen the structure after the channel is opened, and the end-blocking wall is arranged at the other end of the channel support, and is used to block one end of the channel support; The channel support comprises a corrugated plate and a first annular beam, a plurality of the corrugated plates are sequentially connected to form an annular support belt ring, and adjacent support belt rings are connected by the first annular beam; The first annular beam is coaxial with the support belt ring; Angle steels are welded to the first annular beams at the steps on both sides of the tunnel, and ribs are arranged inside the angle steels, so that when the step method is used for excavation, the tunnel superstructure and the covering soil can be supported by the angle steels at the steps; Steel supports are provided on both sides and the arch of the corrugated plate; The steel support includes a transverse support and a longitudinal support, wherein the transverse support is located on the core soil, and the longitudinal support is erected on the transverse support. Rubber pads are arranged on both sides of the transverse support and on the top of the longitudinal support, and the rubber pads play a supporting role for the corrugated plate; The horse head door composite ring beam comprises an I-beam and a steel plate, the I-beam is welded by a first steel plate and a second steel plate to form a composite beam, and a plurality of composite beams are sequentially connected by the second steel plate to form a frame beam-column system; The end-sealed wall comprises a first profile and a second profile that are detachably connected, a plurality of the first profiles are arranged in parallel, a plurality of the second profiles are arranged vertically, and the first profiles and the second profiles are arranged crosswise to form a main wall frame of a mesh structure; The channel support is fixedly connected to the second annular beam, and the end-sealing wall is fixedly connected to the inner wall of the second annular beam; The corrugated plate is provided with a first mounting end plate and a second mounting end plate; The first mounting end plates are arranged at a pair of opposite ends of the corrugated plate, and are used to mount the corrugated plate on the first annular beam; The second mounting end plates are arranged at the other pair of opposite ends of the corrugated plates and are used to connect adjacent corrugated plates together.

2. The corrugated plate tunnel initial support structure according to claim 1, characterized in that: The second profile is arranged through the first profile; Alternatively, the second profile is arranged on one side of the first profile.

3. The corrugated plate tunnel initial support structure according to claim 1, characterized in that: The first profile is a channel steel or an I-beam, and the second profile is a steel bar.

4. The corrugated plate tunnel initial support structure according to claim 1, characterized in that: Concrete is poured on the main wall frame.

5. The corrugated plate tunnel initial support structure according to claim 1, characterized in that: The surface of the corrugated plate is sprayed with asphalt, hot-dip galvanizing and / or hot-dip aluminum.

6. The corrugated plate tunnel initial support structure according to claim 1, characterized in that: The first annular beam is provided with a hand hole for facilitating the installation of the first annular beam.

7. The corrugated plate tunnel initial support structure according to claim 1, characterized in that: A waterproof rubber pad is provided between the first mounting end plate and the first annular beam, and between the two second mounting end plates.

8. A tunnel, characterized in that: The invention comprises the corrugated plate initial support structure for tunnel according to any one of claims 1 to 7.

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