Drainage blind pipe structure for tunnel construction

Abstract

The invention particularly relates to a drainage blind pipe structure for tunnel construction, and belongs to the technical field of tunnel drainage. The drainage blind pipe structure for tunnel construction comprises a drainage blind pipe and a fixing assembly. The fixing assembly comprises a sleeve body, a nail body, an elastic wing cavity and a connecting part. The sleeve body is inserted into a mounting hole in the inner wall of a tunnel, a notch through groove is formed in the peripheral wall of the sleeve body in the axial direction of the sleeve body, and a first through hole is formed in the inner wall of the notch through groove. The nail body penetrates through the sleeve body, the nail body is hollow, a discharging opening is formed in the side wall face of the nail body and comprises a first side and a second side, and the first side is close to the head of the nail body. The elastic wing cavity comprises a first elastic wall and a second elastic wall, the first elastic wall is connected to the first side, the second elastic wall comprises a first section and a second section, the first section and the second section are detachably connected, the first section is connected to the second side, the second section is connected to the side, away from the nail body, of the first elastic wall, and the elastic wing cavity penetrates through the first through hole. The connecting part is connected with the nail body and the drainage blind pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel drainage, and in particular relates to a blind pipe structure for tunnel construction drainage. Background Art

[0002] In water-rich areas, a large amount of groundwater will be encountered during tunnel construction. If this groundwater cannot be discharged in time, it will have a serious impact on the construction safety and structural stability of the tunnel. The common drainage method is to set up drainage blind pipes on the primary support surface of the tunnel. The side wall of the drainage blind pipe is equipped with multiple permeable holes, so that groundwater can enter the drainage blind pipe, and finally be guided to the tunnel side ditch, transverse drainage pipe or central ditch through the drainage blind pipe, and discharged to the outside of the tunnel through the drainage system.

[0003] The traditional method of fixing drainage blind pipes is to put a clamp ring on the outer wall of the drainage blind pipe, and then fix the clamp ring to the primary support surface by nails or bolts. However, in water-rich areas, due to the effect of environmental moisture, the concrete mortar on the primary support surface is relatively soft, which will cause the traditional fixing method to reduce the reliability of the drainage blind pipe and increase the risk of the drainage blind pipe falling off. Summary of the invention

[0004] The purpose of the present invention is to provide a drainage blind pipe structure for tunnel construction, which can increase the fixing reliability of the drainage blind pipe.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: the embodiment of the present application provides a drainage blind pipe structure for tunnel construction, including a drainage blind pipe, and also including a fixing assembly, the fixing assembly is used to fix the drainage blind pipe to the inner wall of the tunnel, and the fixing assembly includes a sleeve, a nail body, an elastic wing cavity and a connecting component. The sleeve is inserted into the mounting hole of the inner wall of the tunnel, along the axial direction of the sleeve, the outer peripheral wall of the sleeve is provided with a notch through groove, the inner wall of the notch through groove is provided with a first through hole, and the first through hole is connected to the inside of the sleeve. The nail body is penetrated through the sleeve for inserting into the inner wall of the tunnel, the interior of the nail body is hollow, and the side wall of the nail body is provided with a discharge port, along the axial direction of the nail body, the discharge port includes a first side and a second side, and the first side is close to the head of the nail body. The elastic wing cavity includes a first elastic wall and a second elastic wall, the first elastic wall is connected to the first side, the second elastic wall includes a first segment and a second segment, the first segment and the second segment are detachably connected, the first segment is connected to the second side, the second segment is connected to the side of the first elastic wall away from the nail body, the elastic wing cavity is penetrated by the first through hole, the width of the first elastic wall and the width of the second elastic wall are respectively equal to the spacing between the two opposite side wall surfaces of the notch through groove, and the axis angle between the first elastic wall and the nail body is less than 90°. The connecting component connects the nail body and the drainage blind pipe.

[0006] In some embodiments, the connecting component includes a clamping ring, which is sleeved outside the peripheral wall of the drainage blind pipe and connected to the nail body.

[0007] In some embodiments, the connecting component further comprises a threaded column, which is rotatably connected to the clamping ring, and the threaded column is inserted into the nail body and threadedly connected to the nail body.

[0008] In some embodiments, the snap ring is in an incomplete arc shape.

[0009] In some embodiments, the first segment is provided with a first curved portion, and the second segment is provided with a second curved portion. The bending directions of the first curved portion and the second curved portion are opposite, and the first curved portion and the second curved portion are buckled.

[0010] In some embodiments, the second curved portion is curved toward the inside of the elastic wing cavity.

[0011] In some embodiments, a plurality of second through holes are disposed on the side wall surface of the nail body, and along the axial direction of the nail body, the second through holes extend to the tip of the nail body to separate the tip of the nail body into a multi-petal structure.

[0012] In some embodiments, the outer wall surface of the tip of the nail body is provided with a plurality of pointed protrusions.

[0013] In some embodiments, a third through hole is provided on the inner wall of the notched through hole, and the fixing assembly also includes a clamping tube, which is passed through the third through hole and the second through hole. The clamping tube is flat and includes two oppositely arranged long axis ends and an arc-shaped wall connecting the two long axis ends. One of the two long axis ends is against the side of the second through hole close to the head of the nail body. A pop-up portion is provided on the end of the clamping tube close to the notched through hole, the elastic portion is connected to the arc-shaped wall, and the pop-up portion is bent and inserted in the clamping tube.

[0014] In some embodiments, the third through hole is provided with a recessed portion, and the outer wall surface of the long axis end is provided with a positioning portion, and the positioning portion is accommodated in the recessed portion.

[0015] The present invention has the following beneficial effects:

[0016] 1. When the nail body is nailed into the inner wall of the tunnel, the end of the first elastic wall away from the nail body abuts against the inner wall of the mounting hole and is in a bent state. The first elastic wall can prevent the nail body from moving in the direction of exiting the mounting hole, thereby reducing the risk of the nail body falling out of the mounting hole and improving the reliability of fixing the drainage blind pipe.

[0017] 2. The opening and closing of the discharge port can be controlled by the first elastic wall, that is, when the nail body is nailed to a specified depth and the first elastic wall is bent to a certain extent, the first segment and the second segment of the second elastic wall are disconnected, and an opening is formed between the first segment and the second segment. The solidifying medium is injected into the nail body, and the solidifying medium is sprayed out from the opening formed by the first segment and the second segment to fill the gap between the sleeve and the mounting hole, so that the solidifying medium can strengthen the mounting hole and improve the structural strength of the mounting hole. At the same time, the solidifying medium also increases the connection strength of the sleeve, the nail body and the mounting hole, and further improves the fixation reliability of the drainage blind pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure inside the tunnel of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the fixing assembly (initial state) of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the fixing assembly of the present invention (first elastic wall deformation state);

[0021] Figure 4 for Figure 3 A magnified image of point A;

[0022] Figure 5 for Figure 3 The enlarged view of point B (the state of deformation of the clamping cylinder);

[0023] Figure 6 It is a schematic diagram of the matching of the sleeve body and the clamping tube (the clamping tube is in a deformed state) of the present invention;

[0024] Figure 7 It is a schematic structural diagram of a nail body of the present invention;

[0025] Figure 8 It is a schematic structural diagram of the clamping tube (the clamping tube is in a flat state) of the present invention.

[0026] Figure numbers: 1-tunnel inner wall, 2-drainage channel, 3-drainage blind pipe, 4-annular blind pipe, 5-longitudinal blind pipe, 6-sleeve, 7-notch groove, 8-first through hole, 9-third through hole, 10-nail body, 11-discharge port, 12-first side, 13-second side, 14-elastic wing cavity, 15-second through hole, 16-clamping cylinder, 17-pop-up part, 18-clamping ring, 19-threaded column, 20-mounting hole, 21-first elastic wall, 22-second segment, 23-second bent part, 24-first segment, 25-first bent part, 26-recessed part, 27-positioning part, 28-long axis end, 29-arc wall. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0028] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] The embodiment of the present application provides a drainage blind pipe structure for tunnel construction, including a drainage blind pipe 3, and also including a fixing assembly, the fixing assembly is used to fix the drainage blind pipe 3 to the inner wall 1 of the tunnel, and the fixing assembly includes a sleeve 6, a nail body 10, an elastic wing cavity 14 and a connecting component. The sleeve 6 is inserted into the mounting hole 20 of the inner wall 1 of the tunnel. Along the axial direction of the sleeve 6, the outer peripheral wall of the sleeve 6 is provided with a notch through groove 7, and the inner wall of the notch through groove 7 is provided with a first through hole 8, and the first through hole 8 is connected to the inside of the sleeve 6. The nail body 10 is penetrated by the sleeve 6 and is used to be inserted into the inner wall 1 of the tunnel. The nail body 10 is hollow inside, and the side wall surface of the nail body 10 is provided with a discharge port 11. Along the axial direction of the nail body 10, the discharge port 11 includes a first side 12 and a second side 13, and the first side 12 is close to the head of the nail body 10. The elastic wing cavity 14 includes a first elastic wall 21 and a second elastic wall, the first elastic wall 21 is connected to the first side 12, the second elastic wall includes a first segment 24 and a second segment 22, the first segment 24 and the second segment 22 are detachably connected, the first segment 24 is connected to the second side 13, the second segment 22 is connected to the side of the first elastic wall 21 away from the nail body 10, the elastic wing cavity 14 is penetrated by the first through hole 8, the width of the first elastic wall 21 and the width of the second elastic wall are respectively equal to the distance between the two opposite side wall surfaces of the notch through groove 7, and the axial angle between the first elastic wall 21 and the nail body 10 is less than 90°. The connecting component connects the nail body 10 and the drainage blind pipe 3.

[0030] The drainage blind pipe 3 may include an annular blind pipe 4 and a longitudinal blind pipe 5. The annular blind pipe 4 is arranged around the circumference of the tunnel inner wall 1, and the longitudinal blind pipe 5 is arranged along the axial direction of the tunnel inner wall 1. The annular blind pipe 4 and the longitudinal blind pipe 5 are connected.

[0031] The surface of the drainage blind pipe 3 can be wrapped with a geotextile. The geotextile can protect the drainage blind pipe 3 on the one hand, and reduce the risk of clogging of the water permeable holes of the drainage blind pipe 3 on the other hand.

[0032] The tunnel inner wall 1 may refer to the initial support surface formed after the initial support grouting of the tunnel.

[0033] In the embodiment where the drainage blind pipe 3 includes the annular blind pipe 4 , the tunnel inner wall 1 is provided with a drainage channel 2 corresponding to the annular blind pipe 4 . The drainage channel 2 can guide the water flow so that the seepage water can be introduced into the annular blind pipe 4 .

[0034] Both the annular blind pipe 4 and the longitudinal blind pipe 5 can be fixed to the inner wall 1 of the tunnel by means of fixing components.

[0035] The mounting hole 20 can be formed by drilling in the tunnel inner wall 1 using a drilling device.

[0036] When the sleeve body 6 is inserted into the mounting hole 20 , an interference fit may be formed between the sleeve body 6 and the mounting hole 20 .

[0037] The first elastic wall 21 and the second elastic wall may be made of metal material. For example, the first elastic wall 21 and the second elastic wall may be made of spring steel.

[0038] The head of the nail body 10 refers to the side of the nail body 10 away from the bottom wall of the mounting hole 20 .

[0039] The interior of the nail body 10 is hollow, so that the nail body 10 can contain a solidifying medium. The solidifying medium is initially in a liquid state. After a period of time, the solidifying medium can be solidified into a solid state. For example, the solidifying medium can be concrete.

[0040] The nail body 10 may include a pointed end. When the nail body 10 is inserted into the sleeve body 6, the pointed end of the nail body 10 abuts against the bottom wall of the mounting hole 20, so that the nail body 10 can be nailed into the tunnel inner wall 1 from the bottom wall of the mounting hole 20, and then the drainage blind pipe 3 is connected to the nail body 10 through a connecting component, so that the drainage blind pipe 3 can be fixed.

[0041] The elastic wing cavity 14 is penetrated in the first through hole 8 , so that when the nail body 10 is nailed into the inner wall 1 of the tunnel, the nail body 10 moves axially relative to the sleeve body 6 , thereby enabling the inner wall surface of the first through hole 8 to push the elastic wing cavity 14 to rotate relative to the nail body 10 .

[0042] The axis angle between the first elastic wall 21 and the nail body 10 is less than 90°, and the first elastic wall 21 is inclined toward the side close to the tip of the nail body 10, so that in the initial state, the elastic wing cavity 14 is inclined toward the side close to the tip of the nail body 10 as a whole. On the one hand, in the initial state, before the nail body 10 is nailed into the inner wall 1 of the tunnel, the elastic wing cavity 14 can be completely in the notch through groove 7 of the sleeve body 6, and the elastic wing cavity 14 will not contact the inner circumferential wall of the mounting hole 20, which is convenient for placing the sleeve body 6 into the mounting hole 20. On the other hand, the length of the first elastic wall 21 can be increased as much as possible, so that when the nail body 10 is nailed into the inner wall 1 of the tunnel, the length of the first elastic wall 21 can meet the requirement that the first elastic wall 21 can be against the inner circumferential wall of the mounting hole 20 when the first elastic wall 21 rotates relative to the nail body 10.

[0043] When the nail body 10 is nailed into the inner wall 1 of the tunnel, as the nail body 10 moves axially relative to the sleeve body 6, the inner wall surface of the first through hole 8 first pushes the second elastic wall to rotate, and the second elastic wall then pushes the first elastic wall 21 to rotate relative to the nail body 10, until the end of the first elastic wall 21 away from the nail body 10 abuts against the inner circumferential wall of the mounting hole 20. Subsequently, the nail body 10 moves further, and the first elastic wall 21 is driven to become a bent state, and its inner bent side faces the end of the mounting hole 20. At this time, the first elastic wall 21 can prevent the nail body 10 from moving in the direction of exiting the mounting hole 20, reducing the risk of the nail body 10 coming out of the mounting hole 20 and improving the reliability of fixing the drainage blind pipe 3.

[0044] The outlet 11 is used to discharge the solidified medium injected into the nail body 10. The first elastic wall 21 is connected to the first side 12, and the first segment 24 is connected to the second side 13, so that the elastic wing cavity 14 can communicate with the inside of the nail body 10 through the outlet 11.

[0045] The device for injecting the curing medium into the nail body 10 can be selected from existing devices, which will not be described in detail here.

[0046] The inner wall surface of the notch through groove 7 refers to the bottom surface of the notch through groove 7 close to the inside of the sleeve body 6.

[0047] The width of the first elastic wall 21 is equal to the distance between the two opposite side walls of the notch groove 7, so that the first elastic wall 21 can abut against the two opposite side walls of the notch groove 7, and further when the first elastic wall 21 abuts against the inner wall of the mounting hole 20, the inner wall of the mounting hole 20, the notch groove 7 and the first elastic wall 21 can form a chamber for accommodating the solidifying medium, thereby reducing the risk of the solidifying medium leaking from the port of the mounting hole 20.

[0048] In water-rich areas, the initial support surface is relatively soft, and concrete mortar is easy to fall off to form sand and soil contained in the installation hole 20 , which may block the discharge port 11 of the nail body 10 when the sleeve 6 is inserted into the installation hole 20 .

[0049] The width of the second elastic wall is equal to the distance between the two opposite side walls of the notch groove 7, so that the first elastic wall 21, the second elastic wall and the two opposite side walls of the notch groove 7 can form a chamber structure, and the chamber structure covers the discharge port 11 of the nail body 10, reducing the risk of the discharge port 11 being blocked by sand when the sleeve 6 is inserted into the mounting hole 20.

[0050] The opening and closing of the discharge port 11 can be controlled by the first elastic wall 21, that is, by reasonably setting the connection strength of the first segment 24 and the second segment 22, when the nail body 10 is nailed to a specified depth, the first segment 24 and the second segment 22 are disconnected after the first elastic wall 21 is bent to a certain extent, and an opening is formed between the first segment 24 and the second segment 22. Since the nail body 10 is hollow inside, the solidifying medium is injected into the nail body 10. On the one hand, the solidifying medium can increase the structural strength of the nail body 10, and on the other hand, the solidifying medium is ejected from the opening formed by the first segment 24 and the second segment 22 to fill the gap between the sleeve body 6 and the mounting hole 20, so that the solidifying medium can strengthen the mounting hole 20, improve the structural strength of the mounting hole 20, and reduce the risk that the drainage blind pipe 3 cannot be reliably fixed due to the low structural strength of the initial support surface. At the same time, the solidifying medium also increases the connection strength of the sleeve body 6, the nail body 10 and the mounting hole 20, further improving the reliability of fixing the drainage blind pipe 3.

[0051] The device for nailing the nail body 10 into the inner wall 1 of the tunnel can be selected from the existing devices, which will not be elaborated here. By judging the position of the nail body 10 relative to the sleeve 6, the depth of the nail body 10 nailed into the inner wall 1 of the tunnel can be controlled, thereby reducing the risk of damaging the elastic wing cavity 14 structure by excessively nailing the nail body 10 into the inner wall 1 of the tunnel.

[0052] In some embodiments, the connecting component includes a clamping ring 18 , which is sleeved outside the peripheral wall of the drainage blind pipe 3 , and the clamping ring 18 is connected to the nail body 10 .

[0053] The blind drainage pipe 3 can be connected to the nail body 10 through the clamp ring 18, so that the blind drainage pipe 3 can be fixed to the inner wall 1 of the tunnel.

[0054] In some embodiments, the connecting component further includes a threaded column 19 , which is rotatably connected to the clamping ring 18 , and the threaded column 19 is inserted into the nail body 10 and threadedly connected to the nail body 10 .

[0055] On the one hand, the threaded column 19 can connect the clamping ring 18 and the nail body 10. On the other hand, the threaded column 19 can also extrude the solidifying medium. That is, after the solidifying medium is injected into the nail body 10, due to the viscosity of the solidifying medium itself, the solidifying medium will not immediately flow out from the head of the nail body 10. After the solidifying medium is injected, the threaded column 19 is screwed into the nail body 10 in time to seal the solidifying medium inside the nail body 10. As the length of the threaded column 19 screwed into the nail body 10 increases, the solidifying medium is squeezed so that it can be sprayed out from the opening formed by the first segment 24 and the second segment 22.

[0056] In some embodiments, the collar 18 is in an incomplete arc shape.

[0057] The incomplete arc-shaped structure of the clamp ring 18 provides a gap in the clamp ring 18 , and the drainage blind pipe 3 can be inserted into the inside of the clamp ring 18 through the gap in the clamp ring 18 , so as to facilitate the connection between the drainage blind pipe 3 and the clamp ring 18 .

[0058] In some embodiments, the first segment 24 is provided with a first bend 25 , and the second segment 22 is provided with a second bend 23 . The bending directions of the first bend 25 and the second bend 23 are opposite, and the first bend 25 and the second bend 23 are buckled.

[0059] The first curved portion 25 and the second curved portion 23 are buckled together, so that the first segment 24 and the second segment 22 can be detachably connected, and when the second elastic wall is bent to a certain extent, the first curved portion 25 and the second curved portion 23 can be deformed, so that the buckling structure therebetween is disconnected.

[0060] In some embodiments, the second curved portion 23 is bent toward the inside of the elastic wing cavity 14 .

[0061] Correspondingly, the first bent portion 25 bends toward the outside of the elastic wing cavity 14 .

[0062] When the solidified medium is discharged, a cavity structure may be formed between the second segment 22 and the first elastic wall 21 , so that the first elastic wall 21 may also be deformed, thereby reducing the reliability of the first elastic wall 21 in limiting the nail body 10 .

[0063] The first curved portion 25 is curved toward the outside of the elastic wing cavity 14 , so that when the solidifying medium flows through the first curved portion 25 , it can be subjected to a force away from the opening formed by the first segment 24 and the second segment 22 , thereby facilitating a portion of the solidifying medium to enter between the second segment 22 and the first elastic wall 21 .

[0064] The second curved portion 23 bends toward the inside of the elastic wing cavity 14, so that the second curved portion 23 can limit the solidified medium flowing into the second segment 22 and the first elastic wall 21, thereby allowing part of the solidified medium to remain between the second segment 22 and the first elastic wall 21. After the solidified medium between the second segment 22 and the first elastic wall 21 is solidified, it is difficult for the first elastic wall 21 to deform, thereby improving the reliability of the first elastic wall 21 in limiting the nail body 10.

[0065] In some embodiments, a plurality of second through holes 15 are disposed on the side wall of the nail body 10 , and along the axial direction of the nail body 10 , the second through holes 15 extend to the tip of the nail body 10 to separate the tip of the nail body 10 into a multi-petal structure.

[0066] The multi-petal tip of the nail body 10 allows the solidified medium inside the nail body 10 to be discharged from the tip of the nail body 10, so as to strengthen the structural strength of the tunnel inner wall 1 at the tip of the nail body 10, reduce the risk of the nail body 10 escaping from the mounting hole 20, and improve the reliability of fixing the drainage blind pipe 3.

[0067] In some embodiments, the outer wall surface of the tip of the nail body 10 is provided with a plurality of pointed protrusions.

[0068] The pointed protrusion can increase the friction between the tip of the nail body 10 and the inner wall 1 of the tunnel, reduce the risk of the nail body 10 escaping from the mounting hole 20 , and improve the reliability of fixing the drainage blind pipe 3 .

[0069] In some embodiments, a third through hole 9 is provided on the inner wall of the notched through hole 7, and the fixing assembly also includes a clamping tube 16, which is passed through the third through hole 9 and the second through hole 15. The clamping tube 16 is flat, and includes two oppositely arranged long axis ends 28 and an arc-shaped wall 29 connecting the two long axis ends 28. One of the two long axis ends 28 is against the side of the second through hole 15 close to the head of the nail body 10. A pop-up portion 17 is provided at one end of the clamping tube 16 close to the notched through hole 7, and the elastic portion is connected to the arc-shaped wall 29. The pop-up portion 17 is bent and inserted into the clamping tube 16.

[0070] The notched through grooves 7 can be symmetrically arranged on both sides of the sleeve body 6, corresponding to the multiple second through holes 15 of the nail body 10, wherein two second through holes 15 are arranged opposite to each other, so that the two ends of the clamping tube 16 can be respectively passed through the corresponding second through hole 15 and the third through hole 9.

[0071] The cross section of the third through hole 9 may be circular, and the axial direction of the third through hole 9 may be perpendicular to the axial direction of the sleeve body 6 .

[0072] The clamping tube 16 is flat, which facilitates the insertion of the clamping tube 16 into the second through hole 15 .

[0073] In the cross section of the clamping tube 16 , the line segment formed by the line connecting the two long axis ends 28 is the longest.

[0074] The long axis end 28 abuts against the side of the second through hole 15 close to the head of the nail body 10, so that when the nail body 10 is nailed into the inner wall 1 of the tunnel, the second through hole 15 can squeeze the clamping tube 16. Since the clamping tube 16 is flat in the initial state, under the squeezing action of the second through hole 15 and the limiting action of the third through hole 9, the clamping tube 16 has a tendency to be squeezed into a cylindrical structure, thereby causing the parts of the tip of the nail body 10 on both sides of the clamping tube 16 to have a tendency to move away from each other. When the nail body 10 is nailed into the inner wall 1 of the tunnel, under the squeezing action of the inner wall 1 of the tunnel, the multi-petal structure of the tip has a tendency to move closer to each other, and at the same time, sand and soil can also block the second through hole 15, so that the solidified medium may not be discharged from the tip. Under the action of the clamping tube 16, the parts of the tip located on both sides of the clamping tube 16 can be separated, reducing the risk of the second through hole 15 being blocked and causing the solidified medium to be unable to be discharged from the tip.

[0075] The elastic part is a structure capable of generating elastic deformation. For example, the elastic part may be made of spring steel.

[0076] In the initial state, the elastic part cannot be ejected from the clamping tube 16 due to the close spacing between the two arc-shaped walls 29. When the long axis end 28 is compressed, the curvature of the two arc-shaped walls 29 increases, that is, the bending degree of the two arc-shaped walls 29 increases, so that the elastic part can be ejected from the clamping tube 16 under the action of the elastic restoring force. By reasonably setting the length of the elastic part, the elastic part can be against the inner wall of the mounting hole 20 after being ejected. At this time, the elastic part can play a role in limiting the sleeve 6, reducing the risk of the sleeve 6 being separated from the mounting hole 20. In addition, after the elastic part is ejected, as the curvature of the arc-shaped wall 29 further increases, the elastic part can also be deformed into an arc-shaped plate structure. The arc-shaped plate structure can disperse the force on the elastic part along the axial direction of the sleeve 6, so that the structural strength of the elastic part is increased, thereby increasing the limiting effect of the elastic part on the sleeve 6.

[0077] In some embodiments, the third through hole 9 is provided with a recessed portion 26 , and the outer wall surface of the long axis end 28 is provided with a positioning portion 27 , and the positioning portion 27 is accommodated in the recessed portion 26 .

[0078] The cooperation between the recessed portion 26 and the positioning portion 27 reduces the risk that the clamping tube 16 rotates relative to the third through hole 9 when under pressure, thereby making the clamping tube 16 unable to deform.

[0079] The above embodiments are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A drainage blind pipe structure for tunnel construction, comprising a drainage blind pipe (3), characterized in that: It also includes a fixing assembly for fixing the drainage blind pipe (3) to the inner wall (1) of the tunnel, and the fixing assembly includes: A sleeve (6) is inserted into a mounting hole (20) of an inner wall (1) of a tunnel, and an outer peripheral wall of the sleeve (6) is provided with a notch groove (7) along the axial direction of the sleeve (6), and an inner wall of the notch groove (7) is provided with a first through hole (8), and the first through hole (8) is communicated with the interior of the sleeve (6); A nail body (10) is inserted into the sleeve (6) and is used to be inserted into the inner wall (1) of the tunnel. The nail body (10) is hollow inside. A discharge port (11) is provided on the side wall of the nail body (10). Along the axial direction of the nail body (10), the discharge port (11) includes a first side (12) and a second side (13). The first side (12) is close to the head of the nail body (10). The elastic wing cavity (14) comprises a first elastic wall (21) and a second elastic wall, wherein the first elastic wall (21) is connected to the first side (12), and the second elastic wall comprises a first segment (24) and a second segment (22), wherein the first segment (24) and the second segment (22) are detachably connected, wherein the first segment (24) is connected to the second side (13), and the second segment (22) is connected to a side of the first elastic wall (21) away from the nail body (10), wherein the elastic wing cavity (14) is penetrated by the first through hole (8), wherein the width of the first elastic wall (21) and the width of the second elastic wall are respectively equal to the distance between two opposite side wall surfaces of the notch through groove (7), and the axis angle between the first elastic wall (21) and the nail body (10) is less than 90°; A connecting component connects the nail body (10) and the drainage blind pipe (3).

2. The tunnel construction drainage blind pipe structure according to claim 1, characterized in that: The connecting component comprises a clamping ring (18), the clamping ring (18) is sleeved outside the peripheral wall of the drainage blind pipe (3), and the clamping ring (18) is connected to the nail body (10).

3. The tunnel construction drainage blind pipe structure according to claim 2, characterized in that: The connecting component further comprises a threaded column (19), wherein the threaded column (19) is rotatably connected to the clamping ring (18), and the threaded column (19) is inserted into the nail body (10) and is threadably connected to the nail body (10).

4. The tunnel construction drainage blind pipe structure according to claim 2, characterized in that: The clamping ring (18) is in an incomplete arc shape.

5. The tunnel construction drainage blind pipe structure according to claim 1, characterized in that: The first segment (24) is provided with a first curved portion (25), and the second segment (22) is provided with a second curved portion (23); the first curved portion (25) and the second curved portion (23) have opposite bending directions, and the first curved portion (25) and the second curved portion (23) are buckled.

6. The tunnel construction drainage blind pipe structure according to claim 5, characterized in that: The second curved portion (23) is curved toward the inside of the elastic wing cavity (14).

7. The tunnel construction drainage blind pipe structure according to claim 1, characterized in that: The side wall surface of the nail body (10) is provided with a plurality of second through holes (15), and along the axial direction of the nail body (10), the second through holes (15) extend to the tip of the nail body (10) to separate the tip of the nail body (10) into a multi-petal structure.

8. The tunnel construction drainage blind pipe structure according to claim 7, characterized in that: The outer wall surface of the tip of the nail body (10) is provided with a plurality of pointed protrusions.

9. The tunnel construction drainage blind pipe structure according to claim 7, characterized in that: The inner wall of the notched through-slot (7) is provided with a third through-hole (9), and the fixing assembly further comprises a clamping tube (16), wherein the clamping tube (16) is passed through the third through-hole (9) and the second through-hole (15), and the clamping tube (16) is flat, and comprises two long axis ends (28) arranged opposite to each other and an arc-shaped wall (29) connecting the two long axis ends (28), and one of the two long axis ends (28) abuts against a side of the second through-hole (15) close to the head of the nail body (10), and an ejection portion (17) is provided at one end of the clamping tube (16) close to the notched through-slot (7), and the elastic portion is connected to the arc-shaped wall (29), and the ejection portion (17) is bent and inserted into the clamping tube (16).

10. The tunnel construction drainage blind pipe structure according to claim 9, characterized in that: The third through hole (9) is provided with a recessed portion (26), and the outer wall surface of the long axis end (28) is provided with a positioning portion (27), and the positioning portion (27) is accommodated in the recessed portion (26).

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