Foot-lock anchor pipe device for preventing deformation of secondary lining during replacement of tunnel inverted arch

Abstract

The utility model provides a feet-lock anchor pipe device for preventing deformation of a secondary lining during replacement of a tunnel inverted arch, which comprises a feet-lock steel pipe and a reinforcing steel reinforcement cage component arranged in the feet-lock steel pipe, and the reinforcing steel reinforcement cage component and the feet-lock steel pipe are concentrically arranged. A supporting pad assembly enabling the foot-locking steel pipe and the reinforcing steel reinforcement cage assembly to be concentrically arranged is arranged between the foot-locking steel pipe and the reinforcing steel reinforcement cage assembly, a plurality of grouting holes communicated with an inner cavity of the foot-locking steel pipe are formed in the side wall of the foot-locking steel pipe, and a reinforcing steel reinforcement cage is arranged in the original foot-locking steel pipe for grouting. The anchoring quality and the binding force between the steel pipe and the rock stratum are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building processing, and particularly relates to a lock foot anchor pipe device for preventing deformation of secondary lining during tunnel inverted arch dismantling and replacement. BACKGROUND

[0002] In the prior art, to prevent deformation of secondary lining concrete during tunnel inverted arch dismantling and replacement, a lock foot steel pipe is usually arranged for lock foot reinforcement of the secondary lining concrete. However, the current lock foot steel pipe is a seamless steel pipe. During the inverted arch dismantling and replacement, the secondary lining structure concrete is still prone to deformation and instability due to the loss of closed-loop support of the inverted arch. Therefore, the construction risk during the inverted arch dismantling and replacement process is still high.

[0003] Therefore, those skilled in the art need to improve the existing lock foot steel pipe to overcome the above-mentioned defects. SUMMARY

[0004] The main purpose of the present application is to provide a lock foot anchor pipe device for preventing deformation of secondary lining during tunnel inverted arch dismantling and replacement. A reinforcing steel cage is arranged in the original lock foot steel pipe, and grouting is performed to improve the anchoring quality and the bonding force between the steel pipe and the rock stratum.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present application provides a lock foot anchor pipe device for preventing deformation of secondary lining during tunnel inverted arch dismantling and replacement. The device comprises a lock foot steel pipe and a reinforcing steel cage assembly arranged in the lock foot steel pipe. The reinforcing steel cage assembly is concentrically arranged with the lock foot steel pipe. A support pad assembly is arranged between the lock foot steel pipe and the reinforcing steel cage assembly to maintain the concentric arrangement of the two. A plurality of grouting holes are formed in the side wall of the lock foot steel pipe and are in communication with the inner cavity of the lock foot steel pipe.

[0006] Optionally, the reinforcing steel cage assembly comprises at least three main reinforcement bars and a plurality of stirrups fixedly arranged outside all the main reinforcement bars.

[0007] Optionally, the main reinforcement bars and the stirrups are welded and fixed.

[0008] Optionally, the main reinforcement bars are threaded steel bars with a diameter of 12 mm, and the length of the main reinforcement bars is greater than or equal to 4.3 m.

[0009] Optionally, the stirrups are disc-shaped reinforcement bars with a diameter of 8 mm, and the stirrups are distributed at equal intervals. The distance between adjacent stirrups is 1 m.

[0010] Optionally, the support pad assembly comprises a protective pad block corresponding to each main reinforcement bar. The protective pad block is arranged between the lock foot steel pipe and the stirrups.

[0011] Optionally, the protective pad block is a rubber pad.

[0012] Optionally, the diameter of the grouting hole is 12mm.

[0013] Optionally, the outer side wall of the locking steel pipe is provided with a plurality of grouting holes, the grouting holes are equidistantly distributed along the axial direction of the locking steel pipe, and adjacent grouting holes distributed along the circumferential direction of the locking steel pipe are staggered.

[0014] Optionally, the locking steel pipe is a seamless steel pipe.

[0015] Compared with the prior art, the locking anchor pipe device for preventing deformation of the secondary lining of the tunnel inverted arch has the beneficial effects that the application of the steel reinforcement cage is strengthened, the steel reinforcement cage is newly added under the premise of the traditional locking steel pipe to improve the anchoring quality, the reinforcing quality of the locking steel pipe is improved, the safety hidden danger is eliminated, the locking steel pipe + grouting is designed to provide strong support for the secondary lining structure concrete, the combination of the steel pipe and the rock stratum is improved through grouting, the construction safety risk is reduced, and the safety of the inverted arch replacement work is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, objects and advantages of this application become more apparent. The illustrative embodiment drawings of this application and the description thereof are used to explain this application, and do not constitute an improper limitation on this application. In the drawings:

[0017] Fig. 1 is a sectional view of the utility model;

[0018] Fig. 2 is a schematic view of the utility model.

[0019] 1, locking steel pipe; 2, main reinforcement; 3, stirrup; 4, grouting hole; 5, protective pad. DETAILED DESCRIPTION

[0020] In order to enable personnel in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] In addition, the term "multiple" should mean two or more.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figs. 1-2 As shown, a locking anchor pipe device for preventing secondary lining deformation during tunnel invert replacement includes a locking steel pipe 1 and a reinforcing steel cage assembly disposed within the locking steel pipe 1. The reinforcing steel cage assembly is concentrically arranged with the locking steel pipe 1. A support pad assembly is provided between the locking steel pipe 1 and the reinforcing steel cage assembly to maintain their concentricity. The side wall of the locking steel pipe 1 has several grouting holes 4 communicating with its inner cavity. The locking steel pipe 1 is made of seamless steel pipe.

[0027] Specifically, the reinforcing cage assembly comprises at least three main bars 2, a plurality of stirrups 3 fixedly sleeved outside all the main bars 2, and the main bars 2 and the stirrups 3 are welded and fixed, the main bars 2 are deformed steel bars with a diameter of 12 mm, the length of the main bars 2 is greater than or equal to 4.3 m, the stirrups 3 are round steel bars with a diameter of 8 mm, the stirrups 3 are distributed at equal intervals, the interval between adjacent stirrups 3 is 1 m, the support pad assembly comprises a protective pad 5 corresponding to each main bar 2, the protective pad 5 is arranged between the lock foot steel pipe 1 and the stirrup 3, and the protective pad 5 is a rubber pad.

[0028] Before construction, the reinforcing cage is processed in advance in the rear field, which is composed of three 12 deformed steel bars as main bars 2 and round 8 steel bars as stirrups 3, after the lock foot steel pipe 1 is placed, the reinforcing cage is placed, and grouting work is performed after the reinforcing cage is placed, under the premise of the traditional lock foot steel pipe 1, the new reinforcing cage improves the anchoring quality, common steel bars are used on the site, the utilization of raw materials is very convenient, the combination of the steel pipe and the rock stratum can be improved through grouting, and the safety of the inverted arch dismantling work can be significantly improved.

[0029] Regarding the grouting hole 4, specifically, the grouting hole 4 has a diameter of 12 mm, a plurality of grouting holes 4 are arranged on the outer wall of the lock foot steel pipe 1, the grouting holes 4 are distributed at equal intervals along the axial direction of the lock foot steel pipe 1, and adjacent grouting holes 4 distributed along the circumferential direction of the lock foot steel pipe 1 are arranged alternately, so as to ensure the uniformity of grouting.

[0030] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A locking anchor pipe device for preventing secondary lining deformation during tunnel invert replacement, characterized in that, The device includes a locking steel pipe and a reinforcing steel cage assembly disposed inside the locking steel pipe. The reinforcing steel cage assembly is concentrically arranged with the locking steel pipe. A support pad assembly is provided between the locking steel pipe and the reinforcing steel cage assembly to keep them concentrically arranged. The side wall of the locking steel pipe has several grouting holes that communicate with its inner cavity.

2. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 1, characterized in that: The reinforced steel cage assembly includes at least three main bars and multiple stirrups fixedly sleeved on the outside of all the main bars.

3. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 2, characterized in that: The main reinforcement bar and the stirrup bar are welded and fixed together.

4. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 2, characterized in that: The main reinforcing bars are made of 12mm diameter threaded steel and the length of the main reinforcing bars is ≥4.3m.

5. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 4, characterized in that: The stirrups are made of coiled steel bars with a diameter of 8mm. The stirrups are evenly spaced, and the spacing between adjacent stirrups is 1m.

6. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 2, characterized in that: The support pad assembly includes protective pads that correspond one-to-one with the main reinforcing bars, and the protective pads are disposed between the locking foot steel pipe and the stirrup.

7. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 6, characterized in that: The protective pad is a rubber pad.

8. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 1, characterized in that: The diameter of the grouting hole is 12mm.

9. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 1, characterized in that: The outer wall of the locking foot steel pipe is provided with a plurality of grouting holes, which are distributed at equal intervals along the axial direction of the locking foot steel pipe, and adjacent grouting holes distributed along the circumference of the locking foot steel pipe are staggered.

10. The anchor pipe device for preventing secondary lining deformation during tunnel invert replacement as described in claim 1, characterized in that: The locking foot steel pipe is made of seamless steel pipe.

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