Positioning and surviving device for tunnel secondary lining construction pressure reducing pipe

Abstract

The invention discloses a tunnel secondary lining construction pressure reducing pipe positioning and surviving device which comprises a positioning sleeve, a first lining and a second lining, and one end of the positioning sleeve is pre-embedded in surrounding rock or primary lining concrete; one end of the extrusion movable petal intubation tube is coaxially and detachably connected with the other end of the positioning sleeve, and a plurality of notches are uniformly formed in the other end of the extrusion movable petal intubation tube at intervals in the circumferential direction to form a plurality of extrusion movable petals; and the flexible filler is filled in the positioning sleeve and the extrusion movable petal intubation tube. The movable flap of the extrusion movable flap intubation tube can be obviously exposed on the surface of secondary lining concrete, and the center of the pressure relief hole can be quickly positioned through the center auxiliary positioning groove formed in the flap, so that the purpose of accurately positioning the center of the pressure relief hole is achieved, and the service life of the pressure relief hole is prolonged. And the pressure reducing pipe positioning and surviving device is prevented from being blocked by the poured concrete through the flexible filler filled in the pressure reducing pipe positioning and surviving device, so that the through hole operation can be conveniently and quickly carried out, and the labor intensity of field workers can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and more specifically to a device for positioning and activating a pressure reducing pipe for secondary lining construction of a tunnel. Background Art

[0002] During the construction of the secondary lining of the tunnel, in order to reduce the pressure of grouting and seasonal drainage, it is necessary to first embed the pressure relief hole positioning device, and through the extrusion of the secondary lining formwork, make the embedded pressure relief hole positioning device contact with the secondary lining formwork, and finally after the formwork is removed, the position of the pressure relief hole is located through the traces of the embedded pressure relief hole positioning device exposed on the concrete surface, and then the secondary through-hole operation is carried out.

[0003] In actual construction, the deflection of the pre-embedded pressure relief hole positioning and activation device caused by the extrusion of the secondary lining formwork will cause a considerable loss in the activity of the pre-embedded pressure relief hole positioning and activation device. And if the secondary lining concrete intrudes into the interior of the pre-embedded pressure relief hole positioning and activation device through the contact gap, the unnecessary labor intensity of the workers on site will be increased during the construction of the secondary positioning through hole. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] In order to achieve these purposes and other advantages according to the present invention, a device for positioning and activating a pressure relief pipe for secondary lining construction of a tunnel is provided, comprising:

[0006] Positioning casing, one end of which is embedded in the surrounding rock or primary lining concrete;

[0007] An extrusion movable flap cannula, one end of which is coaxially and detachably connected to the other end of the positioning sleeve, and the other end of the extrusion movable flap cannula is provided with a plurality of notches evenly spaced along the circumference to form a plurality of extrusion movable flaps;

[0008] Flexible filler is filled in the positioning sleeve and the extruded movable valve cannula.

[0009] Preferably, the inner wall of the other end of the positioning sleeve is provided with a first internal thread, the outer wall of one end of the extruded movable valve cannula is provided with a first external thread matching the internal thread, and the positioning sleeve is connected to the extruded movable valve cannula via threads.

[0010] Preferably, an outer wall of one end of the positioning sleeve pre-buried in the surrounding rock or primary lining concrete is provided with annular ribs.

[0011] Preferably, an auxiliary positioning groove is provided at the center of the inner wall of the extrusion movable flap along the axial direction of the extrusion movable flap insertion tube.

[0012] Preferably, a first groove is provided at the end of the extrusion movable flap, and the first groove extends obliquely from the inner wall of the extrusion movable flap to the outer wall to the end.

[0013] Preferably, second grooves are provided on both sides of the extrusion movable flap, and the second grooves extend obliquely from the inner wall to the outer wall of the extrusion movable flap.

[0014] Preferably, the outer wall of the extrusion movable flap is provided with annular ribs.

[0015] Preferably, the color of the extruded movable flap is different from the color of concrete.

[0016] Preferably, it also includes:

[0017] A positioning reinforcement plate, which is in a rounded square shape, with a first threaded hole at the center of the positioning reinforcement plate, a second external thread matching the first threaded hole at the middle of the outer wall of the positioning sleeve, the positioning reinforcement plate is threadedly connected to the positioning sleeve, and a through hole is provided at each of the four corners of the positioning reinforcement plate, and rivets for fixing the positioning reinforcement plate to the surrounding rock or the primary lining concrete are penetrated through the through holes;

[0018] A connecting plate, which is in a rounded diamond shape, a second threaded hole matching the second external thread is provided at the center of the connecting plate, the connecting plate is threadedly connected between the positioning reinforcement plate and the extruded movable valve cannula, and a pair of opposite rounded corners of the connecting plate are both provided with internal threaded connecting tubes;

[0019] Two flexible tie rod assemblies are respectively connected to two internal threaded connecting pipes. The flexible tie rod assemblies include: a hydraulic spring rod, both ends of which are connected to ball joints, one of which is threadedly connected to the internal threaded connecting pipe, and the other ball joint is connected to a clamp, which is connected to the second lining steel bars.

[0020] Preferably, a pleated rubber sheet is connected between two adjacent extrusion movable flaps, and the pleated rubber sheet is provided with elastic reinforcing ribs in the annular direction of the extrusion movable flap insert tube, and the elastic reinforcing ribs are integrated with the pleated rubber sheet.

[0021] The present invention includes at least the following beneficial effects: after the second lining formwork is removed, the movable flaps of the symmetrically distributed extruded movable flap inserts that are in close contact with the formwork can be clearly exposed on the surface of the second lining concrete, and the center of the pressure reducing hole can be quickly located through the central auxiliary positioning groove set on the flaps, thereby achieving the purpose of accurately locating the center of the pressure reducing hole, and the flexible filler filled inside the pressure reducing pipe positioning and activating device prevents the poured concrete from blocking the pressure reducing pipe positioning and activating device, thereby facilitating and quickly performing through-hole operations, and can effectively reduce the labor intensity of on-site workers.

[0022] The pressure-reducing pipe positioning and activation device of the present invention has a clear structure, simple operation, stable function, and can ensure the activation of the pressure-reducing hole constructed on site in terms of accuracy and convenience.

[0023] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a side structural schematic diagram of the device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel according to an embodiment of the present invention;

[0025] Figure 2 It is a construction schematic diagram of the device for positioning and activating the pressure reducing pipe for the secondary lining construction of the tunnel according to the embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the side structure of the extruded movable valve cannula according to an embodiment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the AA section of the extruded movable valve cannula according to an embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the side structure of the extrusion movable flap according to an embodiment of the present invention;

[0029] Figure 6 A top view of the positioning reinforcement plate, the connecting plate, and the flexible pull rod assembly according to an embodiment of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the AA section of the extruded movable valve cannula according to another embodiment of the present invention;

[0031] Figure 8 This is a schematic construction diagram of a device for positioning and activating a pressure reducing pipe for secondary lining construction of a tunnel according to another embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 cannot be understood as a limitation on the present invention.

[0034] like Figures 1 to 3 As shown, the present invention provides a device for positioning and activating a pressure reducing pipe for secondary lining construction of a tunnel, comprising:

[0035] A positioning sleeve 1, one end of which is pre-buried in the surrounding rock or primary lining concrete;

[0036] An extrusion movable flap cannula 2, one end of which is coaxially and detachably connected to the other end of the positioning sleeve 1, and the other end of the extrusion movable flap cannula 2 is provided with a plurality of notches evenly spaced along the circumference to form a plurality of extrusion movable flaps;

[0037] The flexible filler 3 is filled in the positioning sleeve 1 and the extruded movable valve cannula 2 .

[0038] The use process of the above embodiment is as follows: the position of the pressure reducing pipe is accurately located on the tunnel surrounding rock or primary lining concrete, and then a hole is drilled, and then one end of the positioning sleeve 1 is pre-buried in the tunnel surrounding rock or primary lining concrete. After the second lining steel bars of the tunnel are tied, the positioning sleeve 1 is tied to the second lining steel bars by binding wire. When the second lining template is installed, the extrusion flap insert 2 is squeezed by the second lining template, so that the extrusion flap on the extrusion flap insert 2 is turned outward and closely attached to the inner wall of the second lining template, and then the second lining concrete is poured in the second lining template. Since the flexible filler 3 is pre-filled in the positioning sleeve 1 and the extrusion flap insert 2, the concrete can be prevented from clogging the positioning sleeve 1 and the extrusion flap insert 2, which is beneficial to the subsequent through-hole operation. After the second lining concrete is initially set, the second lining template is removed, so that the extrusion flap can be clearly exposed on the surface of the second lining concrete, which is convenient for the construction personnel to locate the pressure reducing hole. After the construction personnel find the extrusion flap, they can perform through-hole operation in the center of the extrusion flap insert 2. Due to the material characteristics of the flexible filler 3, it can be easily removed, reducing the difficulty of through-hole operation.

[0039] In another embodiment, the inner wall of the other end of the positioning sleeve 1 is provided with a first internal thread, and the outer wall of one end of the extruded movable valve cannula 2 is provided with a first external thread matching the internal thread, and the positioning sleeve 1 is connected to the extruded movable valve cannula 2 by threading. Here, the positioning sleeve 1 and the extruded movable valve cannula 2 are connected by threading, based on the fact that thread processing is relatively mature and simple, and the connection strength of the threaded connection can also meet the connection strength requirements of the positioning sleeve 1 and the extruded movable valve cannula 2.

[0040] In another embodiment, the outer wall of one end of the positioning sleeve 1 embedded in the surrounding rock or primary lining concrete is provided with annular ribs. The end of the positioning sleeve 1 embedded in the surrounding rock or primary lining concrete can be blocked with a mesh cloth, and then the mesh cloth and the positioning sleeve 1 are tied together by winding with binding wire. After the flexible filler 3 is filled in the positioning sleeve 1, the mesh cloth can prevent the flexible filler 3 from leaking out of the positioning sleeve 1. The annular ribs here provide an embedding groove for the binding wire, which facilitates the binding wire to be firmly tied to the positioning sleeve 1.

[0041] like Figure 4 As shown, in another embodiment, an auxiliary positioning groove 4 is opened at the center of the inner wall of the extruded movable flap along the axial direction of the extruded movable flap tube 2, and the groove can assist in positioning the center during the construction of the secondary through hole, so that the pressure reducing hole is accurately positioned.

[0042] like Figure 5 As shown, in another embodiment, the end of the extrusion movable flap is provided with a first groove 5, and the first groove 5 extends obliquely from the inner wall of the extrusion movable flap to the outer wall to the end. When the extrusion movable flap insert tube 2 is extruded by the second lining formwork, causing the extrusion movable flap on the extrusion movable flap insert tube 2 to be turned outward, the first groove 5 can help the end of the extrusion movable flap to be closely attached to the inner wall of the second lining formwork, thereby reducing the concrete that penetrates into the extrusion movable flap insert tube 2 from the end of the extrusion movable flap.

[0043] like Figure 4 As shown, in another embodiment, both sides of the extrusion movable flap are provided with second grooves 6, and the second grooves 6 extend obliquely from the inner wall to the outer wall of the extrusion movable flap. When the extrusion movable flap insert tube 2 is extruded by the second lining formwork, causing the extrusion movable flap on the extrusion movable flap insert tube 2 to be turned outward, the second grooves 6 can help the two sides of the extrusion movable flap to be closely attached to the inner wall of the second lining formwork, thereby reducing the concrete that penetrates into the extrusion movable flap insert tube 2 from the side of the extrusion movable flap.

[0044] In another embodiment, the outer wall of the extrusion movable flap is provided with annular ribs. When the extrusion movable flap cannula 2 is filled with the flexible filler 3, by tying the binding wire on the annular ribs on the outer wall of the extrusion movable flap, the friction between the extrusion movable flap and the flexible filler 3 can be enhanced, and the probability of the flexible filler 3 falling out of the extrusion movable flap cannula 2 can be reduced.

[0045] In another embodiment, the color of the extruded movable flap is different from the color of the concrete. When the secondary lining formwork is removed and the extruded movable flap is obviously exposed on the secondary lining concrete surface, the different colors of the extruded movable flap and the concrete make the extruded movable flap more conspicuous and easy to find.

[0046] For example, at the tunnel secondary lining construction site, the above-mentioned tunnel secondary lining construction pressure relief pipe positioning and activation device was used. Specifically: the positioning sleeve 1 adopts a PVC pipe with a diameter of 75mm and a wall thickness of 5mm, the surface rib depth is 1mm, and the upper end tapped internal thread length is 5cm.

[0047] The extruded movable flap insert 2 has an overall appearance and size model corresponding to the positioning sleeve 1. The upper part is symmetrically distributed with 4 extruded movable flaps, with an arc of 30°, and the edges of the two sides of the extruded movable flap are axially provided with a second groove 6 with a central angle of 5°. The center of the inner wall of the extruded movable flap is provided with an auxiliary positioning groove 4 with a depth of 1mm and a width of 5mm. The outer side is provided with ribs for fixing the flexible filler 3, with a depth of 1mm and a width of 2mm. The upper end is provided with a first groove 5 with a horizontal angle of 75° and a top width of 2mm. The extruded movable flap insert has an external thread corresponding to the positioning sleeve 1 at the lower part, and the extruded movable flap adopts a bright color system that is significantly different from the color of concrete, such as red and blue.

[0048] The flexible filler 3 is made of straw with a maximum cross-sectional size of 2 mm, and is tied with cotton thread to form a short cylinder with a diameter of 75 mm and a height of 50 mm. A mesh with a mesh size of 1.5 mm is used at the bottom of the positioning sleeve 1, and the bottom is tied with binding wire, and the binding thread is fastened to the ribs on the surface of the positioning sleeve 1; the short columnar flexible filler 3 is filled to the movable petal piece that squeezes the movable petal insert 2; the short columnar flexible filler 3 at the movable petal piece is fastened to the outer ribs of the movable petal with binding threads.

[0049] Before pouring concrete, the flexible filler 3 is wetted, the positioning sleeve 1 is pre-buried in the tunnel surrounding rock or primary lining concrete, and fixed to the tunnel secondary lining steel bars by rib binding arranged thereon, and the extrusion movable flap insert 2 is subjected to the extrusion effect caused by the extrusion movable flap insert 2 when the secondary lining formwork is fixed, so that the extrusion movable flap on the extrusion movable flap insert 2 is turned outward; at the same time, the first and second grooves 6 arranged axially and radially strengthen the cutting and extrusion effect on the continuously solidifying concrete, so that the symmetrically distributed petals of the extrusion movable flap insert 2 are closely attached to the inner surface of the secondary lining formwork; in addition, the central auxiliary positioning groove 4 arranged on the symmetrically distributed petals of the extrusion movable flap insert 2 can assist in locating the center during the construction of the secondary through hole.

[0050] In the above-mentioned embodiment, the extruded movable valve cannula 2 needs to withstand the extrusion of the second lining template, but the installation of the second lining template is not completed in one go, but involves a translation and adjustment process. At this time, the friction of the second lining template on the extruded movable valve cannula 2 may cause the axis of the positioning sleeve 1 and the extruded movable valve cannula 2 to deviate, which may lead to the failure of the positioning and activation of the decompression tube. In order to solve this problem, the following embodiment has been further improved.

[0051] like Figure 6 , 8 As shown, in another embodiment, it also includes:

[0052] A positioning reinforcement plate 7 is in a rounded square shape, a first threaded hole is provided at the center of the positioning reinforcement plate 7, a second external thread matching the first threaded hole is provided at the middle of the outer wall of the positioning sleeve 1, the positioning reinforcement plate 7 is threadedly connected to the positioning sleeve 1, and a through hole is provided at each of the four corners of the positioning reinforcement plate 7, and rivets 8 for fixing the positioning reinforcement plate 7 to the surrounding rock or the primary lining concrete are penetrated in the through holes;

[0053] A connecting plate 9 is in a rounded diamond shape, a second threaded hole matching the second external thread is provided at the center of the connecting plate 9, the connecting plate 9 is threadedly connected between the positioning reinforcement plate 7 and the extruded movable valve cannula 2, and a pair of opposite rounded corners of the connecting plate 9 are both provided with internal threaded connecting tubes 10;

[0054] Two flexible tie rod assemblies are respectively connected to two internal threaded connecting pipes 10, and the flexible tie rod assemblies include: a hydraulic spring rod 11, both ends of which are connected to ball joints 12, one of the ball joints 12 is threadedly connected to the internal threaded connecting pipe 10, and the other ball joint 12 is connected to a clamp 13, and the clamp 13 is connected to the second lining steel bar.

[0055] In the above embodiment, the connection between the positioning sleeve 1 and the surrounding rock of the tunnel or the primary lining concrete can be further strengthened by the positioning reinforcement plate 7 and the rivet 8, reducing the possibility of tilting at the root of the positioning sleeve 1. At the same time, a connecting plate 9 and a flexible pull rod assembly are set. When the friction of the second lining template on the extruded movable flap insert 2 causes the positioning sleeve 1 and the extruded movable flap insert 2 to deviate, the rotation of the ball joint 12 and the elongation of the hydraulic spring rod 11 can make the positioning sleeve 1 first follow the deflection process to avoid the external force generated by the friction being too strong and exceeding the buckling limit of the positioning sleeve 1 and causing it to break. After the second lining template is installed and fixed, the contraction force of the hydraulic spring rod 11 causes itself and the ball joint 12 to slowly return to the initial state, thereby correcting the deflected positioning sleeve 1 and reducing the probability of failure in the positioning and survival of the pressure relief pipe.

[0056] In the above embodiment, the extrusion of the secondary lining formwork increases the distance between two adjacent extrusion movable flaps, increasing the probability of the secondary lining concrete penetrating from the root of the extrusion movable flap into the extrusion movable flap insert 2. To solve this problem, the following embodiment is further improved.

[0057] like Figures 7-8 As shown, in another embodiment, a pleated rubber sheet 14 is connected between two adjacent extrusion flaps, and the pleated rubber sheet 14 is provided with elastic reinforcement ribs in the circumferential direction of the extrusion flap insert tube 2, and the elastic reinforcement ribs are integrated with the pleated rubber sheet 14. When the extrusion flap insert tube 2 is extruded by the second lining template, the extrusion flap on the extrusion flap insert tube 2 is turned outward, and the pleated rubber sheet 14 is continuously stretched and expanded from the end of the extrusion flap to the root of the extrusion flap, so as to cover the gap between the two adjacent extrusion flaps, thereby preventing the second lining concrete from penetrating into the extrusion flap insert tube 2 from the root of the extrusion flap. The elastic reinforcement ribs can further strengthen the elastic force of the pleated rubber sheet 14, so that the pleated rubber sheet 14 will not be loose when stretched and expanded, causing the pleated rubber sheet 14 to fold, and avoid the pleated rubber sheet 14 from being padded under the extrusion flap after folding, which will cause a gap between the extrusion flap and the inner wall of the second lining template.

[0058] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A device for positioning and activating a pressure reducing pipe for secondary lining construction of a tunnel, characterized in that: include: Positioning casing, one end of which is embedded in the surrounding rock or primary lining concrete; An extrusion movable flap cannula, one end of which is coaxially and detachably connected to the other end of the positioning sleeve, and the other end of the extrusion movable flap cannula is provided with a plurality of notches evenly spaced along the circumference to form a plurality of extrusion movable flaps; Flexible filler is filled in the positioning sleeve and the extruded movable valve cannula.

2. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: The inner wall of the other end of the positioning sleeve is provided with a first internal thread, and the outer wall of one end of the extruded movable valve cannula is provided with a first external thread matching the internal thread, and the positioning sleeve is connected to the extruded movable valve cannula through threads.

3. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: The outer wall of one end of the positioning sleeve pre-buried in the surrounding rock or primary lining concrete is provided with annular ribs.

4. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: An auxiliary positioning groove is provided at the center of the inner wall of the extrusion movable valve along the axial direction of the extrusion movable valve insertion tube.

5. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: The end of the extrusion movable flap is provided with a first groove, and the first groove extends obliquely from the inner wall of the extrusion movable flap to the outer wall to the end.

6. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: Second grooves are arranged on both sides of the extrusion movable flap, and the second grooves extend obliquely from the inner wall of the extrusion movable flap to the outer wall.

7. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: The outer wall of the extrusion movable flap is provided with annular ribs.

8. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: The color of the extruded movable flap is different from the color of concrete.

9. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: Also includes: A positioning reinforcement plate, which is in a rounded square shape, with a first threaded hole at the center of the positioning reinforcement plate, a second external thread matching the first threaded hole at the middle of the outer wall of the positioning sleeve, the positioning reinforcement plate is threadedly connected to the positioning sleeve, and a through hole is provided at each of the four corners of the positioning reinforcement plate, and rivets for fixing the positioning reinforcement plate to the surrounding rock or the primary lining concrete are penetrated through the through holes; A connecting plate, which is in a rounded diamond shape, a second threaded hole matching the second external thread is provided at the center of the connecting plate, the connecting plate is threadedly connected between the positioning reinforcement plate and the extruded movable valve cannula, and a pair of opposite rounded corners of the connecting plate are both provided with internal threaded connecting tubes; Two flexible tie rod assemblies are respectively connected to two internal threaded connecting pipes. The flexible tie rod assemblies include: a hydraulic spring rod, both ends of which are connected to ball joints, one of which is threadedly connected to the internal threaded connecting pipe, and the other ball joint is connected to a clamp, which is connected to the second lining steel bars.

10. The device for positioning and activating the pressure reducing pipe for the secondary lining construction of a tunnel as claimed in claim 1, characterized in that: A pleated rubber sheet is connected between two adjacent extrusion movable flaps. The pleated rubber sheet is provided with elastic reinforcement ribs in the annular direction of the extrusion movable flap insert tube. The elastic reinforcement ribs are integrated with the pleated rubber sheet.

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