Tunnel lining concrete embedded grouting pipe positioning device

Abstract

The utility model relates to the technical field of tunnel construction, and discloses a tunnel lining concrete embedded grouting pipe positioning device which comprises a tunnel body, the end of a fixing screw is fixedly connected with the tunnel body, and a grouting pipe positioning assembly is arranged in the middle of the top end of a pouring formwork. A grouting pipe body is arranged on the grouting pipe positioning assembly, the grouting pipe positioning assembly is arranged on the pouring formwork, and the two sides of a positioning inserting hole in the grouting pipe positioning assembly can be fixedly connected with the pouring formwork through penetrating of a fixing screw rod by means of the top reinforcing plate and the bottom reinforcing plate which are arranged. The strength of the pouring formwork after the hole is formed in the middle of the pouring formwork cannot be changed, the positioning insertion hole and the anti-blocking insertion groove formed in the top wall of the tunnel body can precisely limit the grouting pipe body inserted into the positioning insertion hole and the anti-blocking insertion groove, then grouting concrete is more conveniently supplemented and built in a gap formed after follow-up concrete shrinkage, and safety grouting use of a user is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, concretely is a kind of tunnel lining concrete pre-burying grouting pipe positioning device. BACKGROUND

[0002] After the construction of tunnel concrete lining is completed, due to pouring process and concrete shrinkage, etc., arch crown is easy to appear emptying, and needs to be backfilled grouting;At the same time, in order to reinforce surrounding rock, make lining concrete and surrounding rock form strong bearing ring, and improve the water plugging capacity, design in arch crown and side wall lining concrete will set consolidation grouting. In order to implement the above-mentioned backfill grouting and consolidation grouting, the initial way is to drill hole in concrete after lining is completed, which inevitably encounters steel bar in the process, causing repeated opening, even more than three openings in one grouting hole position, not only affects the appearance of concrete, but also increases the cost of hole repair, improper handling may leave quality hidden danger.

[0003] After searching, the authorized Chinese patent announcement No. CN220748282U provides a kind of tunnel lining concrete pre-burying grouting pipe positioning device, including pre-burying pipe and positioning device, positioning device includes shell, the lower end of shell is equipped with piston cylinder, retractable rubber plug is equipped in piston cylinder, the bottom surface of rubber plug is coated with fluorescent coating, without special opening in formwork for pre-burying grouting pipe, reduce the damage to formwork, and positioning device is fixed by screw thread, simple and reliable, not only can be used in side wall, also can be used in the pre-burying grouting pipe of arch crown, solve the problem that after the construction of tunnel concrete lining is completed, cannot accurately find the position suitable for backfill grouting.

[0004] The grouting pipe positioning device in the above-mentioned patent still has certain deficiencies, the existing tunnel lining concrete pre-burying grouting pipe is mostly fixed on concrete pouring formwork by screw, the positioning effect is poor, and this fixing mode is easy to cause structural damage to pouring formwork, thereby reducing the overall structural strength of pouring formwork, and there is certain safety hazard. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of tunnel lining concrete pre-burying grouting pipe positioning device, solves the problem that the existing tunnel lining concrete pre-burying grouting pipe is mostly fixed on concrete pouring formwork by screw, the positioning effect is poor, and this fixing mode is easy to cause structural damage to pouring formwork, thereby reducing the overall structural strength of pouring formwork, and there is certain safety hazard.

[0006] The utility model provides following technical scheme: a kind of tunnel lining concrete pre-burying grouting pipe positioning device, including tunnel main part, the top of the tunnel main part is provided with pouring form, two fixed jackscrews are symmetrically opened in the both sides of pouring form bottom end each, fixed jackscrew is inserted in each of the fixed jackscrew, the end of fixed jackscrew is fixedly connected with the tunnel main part, the middle part of pouring form top end is provided with grouting pipe positioning assembly, grouting pipe body is provided on grouting pipe positioning assembly, grouting pipe body bottom end is connected with grouting pipe joint;

[0007] The grouting pipe positioning assembly includes a positioning jack inserted in the middle part of the pouring form top end, a plurality of fixing screw holes are uniformly arranged around the positioning jack, a top reinforcing plate is arranged on the top of the positioning jack, a plurality of fixing perforations are uniformly arranged around the top reinforcing plate, a bottom reinforcing plate is arranged on the bottom of the positioning jack, a sealing sleeve is arranged on the outer side of the bottom reinforcing plate, and a fixing screw rod is inserted through the bottom reinforcing plate.

[0008] In the preferred technical solution one, the top end of the fixing screw rod penetrates the fixing screw hole and the fixing perforation in sequence, and a fixing nut is sleeved on the top end of the fixing screw rod.

[0009] In the preferred technical solution two, the grouting pipe body is inserted through the bottom reinforcing plate, the positioning jack and the middle part of the top reinforcing plate, and a anti-blocking slot is arranged in the middle part of the top wall of the tunnel main part.

[0010] In the preferred technical solution three, the top reinforcing plate and the bottom reinforcing plate are both curved and fit the pouring form.

[0011] The positioning jacks on the pouring form are limited and fixed by the top reinforcing plate and the bottom reinforcing plate, so that the positioning jacks are stable.

[0012] In the preferred technical solution four, the outer diameter of the grouting pipe body is the same as the inner diameter of the anti-blocking slot.

[0013] The top end of the grouting pipe body can be inserted into the anti-blocking slot and covered.

[0014] In the preferred technical solution five, the outer diameter of the grouting pipe body is the same as the inner diameter of the positioning jack.

[0015] The top end of the grouting pipe body can be better inserted through the positioning jack and inserted into the top of the pouring form.

[0016] Compared with the prior art, the utility model provides a tunnel lining concrete pre-burying grouting pipe positioning device, which has the following advantages:

[0017] (1) This utility model provides a grouting pipe positioning component on the casting template. The positioning hole in the grouting pipe positioning component is connected to the casting template by the top and bottom reinforcing plates on both sides through the through-hole of the fixing screw, ensuring that the strength of the casting template will not change after the hole is opened in the middle. The positioning hole and the anti-blocking slot opened on the top wall of the tunnel body can accurately limit the grouting pipe body inserted therein, so that the grouting pipe body is located at the apex of the bending of the top wall of the tunnel body, which makes it easier to fill the gaps formed by the subsequent concrete shrinkage and make it more convenient for users to use for safe grouting. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is an exploded view of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged view of the grouting pipe positioning assembly;

[0021] Figure 4 This is a bottom view of the structure of this utility model.

[0022] In the diagram: 1. Tunnel main body; 2. Casting formwork; 3. Fixing hole; 4. Fixing screw; 5. Grouting pipe positioning assembly; 6. Grouting pipe body; 7. Grouting pipe joint;

[0023] 501. Positioning socket; 502. Fixing screw hole; 503. Top reinforcing plate; 504. Fixing through hole; 505. Bottom reinforcing plate; 506. Sealing sleeve; 507. Fixing screw; 508. Fixing nut; 509. Anti-clogging slot. Detailed Implementation

[0024] Example 1: Please refer to Figures 1-4 The present invention relates to a positioning device for pre-embedded grouting pipes in tunnel lining concrete, comprising a tunnel body 1, a casting template 2 on the top of the tunnel body 1, two fixing holes 3 symmetrically opened on both sides of the bottom end of the casting template 2, fixing screws 4 inserted into the fixing holes 3, the ends of the fixing screws 4 being fixedly connected to the tunnel body 1, a grouting pipe positioning component 5 in the middle of the top end of the casting template 2, a grouting pipe body 6 on the grouting pipe positioning component 5, and a grouting pipe connector 7 connected to the bottom end of the grouting pipe body 6.

[0025] The grouting pipe positioning assembly 5 includes a positioning insertion hole 501 opened at the middle of the top of the casting template 2. Fixing screw holes 502 are evenly opened around the positioning insertion hole 501. A top reinforcing plate 503 is provided at the top of the positioning insertion hole 501. Fixing through holes 504 are evenly opened around the top reinforcing plate 503. A bottom reinforcing plate 505 is provided at the bottom of the positioning insertion hole 501. A sealing sleeve 506 is provided on the outside of the bottom reinforcing plate 505. A fixing screw 507 is inserted through the bottom reinforcing plate 505. The top of the fixing screw 507 passes through the fixing screw hole 502 and the fixing through hole 504 in sequence. A fixing nut 508 is fitted on the top of the fixing screw 507. The grouting pipe body 6 is inserted through the middle of the bottom reinforcing plate 505, the positioning insertion hole 501 and the top reinforcing plate 503. An anti-blocking slot 509 is opened in the middle of the top wall of the tunnel body 1.

[0026] Example 2: The difference between this example and Example 1 is that the top reinforcing plate 503 and the bottom reinforcing plate 505 are both curved and fit in close to the casting template 2.

[0027] This ensures that the positioning holes 501 on the casting template 2 are fixed and stabilized by the top reinforcing plate 503 and the bottom reinforcing plate 505 on both sides.

[0028] Example 3: The difference between this example and Example 1 is that the outer diameter of the grouting pipe body 6 is the same as the inner diameter of the anti-blocking slot 509.

[0029] This allows the top end of the grouting pipe body 6 to be inserted into the anti-blocking slot 509 and covered.

[0030] Example 4: The difference between this example and Example 1 is that the outer diameter of the grouting pipe body 6 is the same as the inner diameter of the positioning hole 501.

[0031] This allows the top of the grouting pipe body 6 to better penetrate the positioning hole 501 and be inserted into the top of the casting template 2.

[0032] In this embodiment, since most of the existing pre-embedded grouting pipes for tunnel lining concrete are fixed to the concrete pouring formwork with screws, the positioning effect is poor, and this fixing method can easily cause structural damage to the pouring formwork, thereby reducing the overall structural strength of the pouring formwork and posing certain safety hazards.

[0033] In summary, in specific implementation, by setting the grouting pipe positioning component 5 on the casting template 2, after the concrete lining construction is completed in the space formed by the casting template 2 and the inner wall of the tunnel body 1, the arch may become void due to the casting process and concrete shrinkage, requiring backfilling and grouting of the arch. The positioning hole 501 in the grouting pipe positioning component 5 is opened in the middle of the top of the casting template 2, and a top reinforcing plate 503 is set on the top side of the positioning hole 501, and a bottom reinforcing plate 505 is set on the bottom side of the positioning hole 501. The top reinforcing plate 503 and the bottom reinforcing plate 505 are fixedly connected to the casting template 2 by a fixing screw 507 passing through them, thereby reinforcing the side of the positioning hole 501 and thus avoiding the positioning hole 501 on the casting template 2 from affecting its structural strength.

[0034] When filling the space between the casting template 2 and the inner wall of the tunnel body 1 with concrete, the user can insert the grouting pipe body 6 through the positioning hole 501 into the anti-blocking slot 509 opened on the top wall of the tunnel body 1. This will cause the concrete filling the space between the tunnel body 1 and the casting template 2 to block the top of the grouting pipe body 6, so that the user can subsequently fill the gaps caused by shrinkage of the previously filled concrete with concrete again.

[0035] Furthermore, when the concrete filling the space between the tunnel body 1 and the casting template 2 is about to solidify, the user can rotate the grouting pipe body 6 inserted therein to effectively prevent the grouting pipe body 6 from connecting with the solidified concrete. This ensures that the grouting pipe body 6 can be easily pulled out after the concrete is added, so as to facilitate subsequent use. This device can more accurately and effectively position and limit the grouting part of the grouting pipe body 6, and ensure that the overall structural strength of the casting template 2 is not affected, making it more convenient for users to safely use the grouting device.

Claims

1. A positioning device for pre-embedded grouting pipes in tunnel lining concrete, comprising a tunnel body (1), characterized in that: The top of the tunnel body (1) is provided with a casting template (2). Two fixing holes (3) are symmetrically opened on both sides of the bottom end of the casting template (2). Fixing screws (4) are inserted into the fixing holes (3). The ends of the fixing screws (4) are fixedly connected to the tunnel body (1). A grouting pipe positioning component (5) is provided in the middle of the top of the casting template (2). A grouting pipe body (6) is provided on the grouting pipe positioning component (5). A grouting pipe connector (7) is connected to the bottom end of the grouting pipe body (6). The grouting pipe positioning assembly (5) includes a positioning insertion hole (501) opened at the middle of the top of the casting template (2), fixing screw holes (502) are evenly opened around the positioning insertion hole (501), a top reinforcing plate (503) is provided at the top of the positioning insertion hole (501), fixing through holes (504) are evenly opened around the top reinforcing plate (503), a bottom reinforcing plate (505) is provided at the bottom of the positioning insertion hole (501), a sealing sleeve (506) is provided on the outside of the bottom reinforcing plate (505), and a fixing screw (507) is inserted through the bottom reinforcing plate (505).

2. The positioning device for pre-embedded grouting pipes in tunnel lining concrete according to claim 1, characterized in that: The top end of the fixing screw (507) passes through the fixing screw hole (502) and the fixing through hole (504) in sequence, and the top end of the fixing screw (507) is fitted with a fixing nut (508).

3. The positioning device for pre-embedded grouting pipes in tunnel lining concrete according to claim 2, characterized in that: The grouting pipe body (6) is inserted through the middle of the bottom reinforcing plate (505), the positioning hole (501) and the top reinforcing plate (503).

4. The positioning device for pre-embedded grouting pipes in tunnel lining concrete according to claim 3, characterized in that: The tunnel body (1) has an anti-blocking slot (509) in the middle of the top wall.

5. The positioning device for pre-embedded grouting pipes in tunnel lining concrete according to claim 3, characterized in that: Both the top reinforcing plate (503) and the bottom reinforcing plate (505) are curved and fit against the casting template (2).

6. The positioning device for pre-embedded grouting pipes in tunnel lining concrete according to claim 4, characterized in that: The outer diameter of the grouting pipe body (6) is the same as the inner diameter of the anti-blocking slot (509).

7. A positioning device for pre-embedded grouting pipes in tunnel lining concrete according to claim 5, characterized in that: The outer diameter of the grouting pipe body (6) is the same as the inner diameter of the positioning hole (501).

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