CN219431843U - Tunnel advance small guide pipe for sandy pebble layer - Google Patents

Abstract

The utility model discloses a tunnel advance small guide pipe for a sandy pebble layer. The utility model comprises a catheter body, wherein a cavity is formed in the catheter body, one end of the catheter body is connected with a drill bit, and the tail end of the drill bit is arranged in the cavity; the catheter body is provided with a plurality of grooves at the position where the catheter body is attached to the drill bit. The utility model can increase the welding area through slotting, thereby further strengthening the drill bit, the problem of falling can not happen when in use, the screw reinforcement is adopted to replace the catheter body as the drill bit, thereby greatly improving the head strength of the drill bit, facilitating drilling, improving the drilling efficiency, increasing the friction force when drilling through the screw thread outside the drill bit, facilitating self drilling, having high working efficiency, simple structure, reliable use and low cost; the drill bit can be processed into a cone shape, a round angle or a plane according to actual conditions, so that the drill bit can conveniently drill in.

Description

Tunnel advance small guide pipe for sandy pebble layer

Technical Field

The utility model relates to the technical field of tunnel advance support, in particular to a tunnel advance small guide pipe for a sandy pebble layer.

Background

On the premise of meeting the safety of tunnel construction, the adaptability of different types of pre-supporting measures to the advanced damage mode is different, and the optimal advanced supporting measure is advanced small guide pipe and grouting for the surrounding rock instability condition of front extrusion damage in the process of opening a tunnel.

In the prior art, the head of the small advance conduit is conical in the prior art, so that the strength of the head of the small advance conduit is low and drilling is not easy when the small advance conduit meets a covering layer section with uneven distribution of large boulders and stones in the gravels.

Disclosure of Invention

The utility model provides a tunnel advance small guide pipe for a sandy pebble layer, and aims to at least solve the technical problems in the background art. The utility model can increase the welding area through slotting, thereby further strengthening the drill bit, the problem of falling can not happen when in use, the screw reinforcement is adopted to replace the catheter body as the drill bit, thereby greatly improving the head strength of the drill bit, facilitating drilling, improving the drilling efficiency, increasing the friction force when drilling through the screw thread outside the drill bit, facilitating self drilling, having high working efficiency, simple structure, reliable use and low cost; the drill bit can be processed into a cone shape, a round angle or a plane according to actual conditions, so that the drill bit can conveniently drill in.

The utility model provides the following technical scheme for realizing the purpose: the tunnel advanced small guide pipe for the sandy pebble layer comprises a guide pipe body, wherein a cavity is formed in the guide pipe body, one end of the guide pipe body is connected with a drill bit, and the tail end of the drill bit is arranged in the cavity; the catheter body is provided with a plurality of grooves at the position where the catheter body is attached to the drill bit.

In the tunnel advance small guide pipe for the sandy pebble layer, the part of the drill bit extending out of the guide pipe body is provided with threads.

In the tunnel advance small guide pipe for the sand-gravel layer, the grooves penetrate through the pipe wall of the guide pipe body, at least three grooves are formed, and the grooves are symmetrically distributed in the axis of the guide pipe body.

In the tunnel advance small guide pipe for the sandy pebble layer, the length of the groove is set to be 10-15cm.

In the tunnel advance small guide pipe for the sandy pebble layer, a group of grouting holes are formed in the guide pipe body at intervals in a penetrating mode.

In the tunnel advance small guide pipe for the sandy pebble layer, one end of the drill bit, which extends out of the guide pipe body, is arranged to be conical, round or flat.

In the tunnel advance small guide pipe for the sandy pebble layer, the drill bit is made of a twisted steel material.

Compared with the prior art, the utility model has the following beneficial effects:

1. the high-strength drill bit is arranged to replace the operation of the catheter body in the prior art, so that the problems that the strength of the head part of the small catheter is low and drilling is difficult are solved; the utility model has the advantages of simple structure, reliable use and low cost.

2. The utility model can increase the welding area through slotting, thereby further reinforcing the drill bit, and the problem of falling off can not occur when the drill bit is used.

3. According to the utility model, the screw reinforcement is adopted to replace the guide pipe body as the drill bit, so that the head strength of the drill bit is greatly improved, drilling is facilitated, and the drilling efficiency is improved.

4. According to the utility model, through the threads outside the drill bit, the friction force during drilling can be increased, so that self drilling is easier, and the working efficiency is high.

5. According to the technical scheme, the drill bit can be processed into a cone shape, a round angle or a plane according to actual conditions, and the drill bit is convenient to drill.

6. The length of the drill bit is 50-55cm, about 3/5 length is positioned in the cavity, and 2/5 length is exposed, so that the drill bit is fixed more firmly.

7. According to the utility model, the length of the slot 3 is set to be 10-15cm, so that the welding area is increased, and the drill bit is further reinforced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic view of the catheter body structure of the present utility model.

The marks in the drawings are: 1-a catheter body; 2-a drill bit; 3-slotting; 4-threading; 5-cavity; 6-grouting holes.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1. A tunnel advance small duct for a sandy pebble layer is composed of a duct body 1, a drill steel bar is cut by screw steel bars with matched diameters, and the length of each section is 50-55cm. One end of the catheter body 1 is provided with a drill bit 2; one end of the drill bit 2, which faces the guide pipe body 1, extends into the guide pipe body 1, the guide pipe body 1 and the drill bit 2 are fixed through welding, a plurality of grooves 3 are formed in the position, where the guide pipe body 1 is attached to the drill bit 2, of the drill bit 2, and threads 4 are formed in the portion, extending out of the guide pipe body 1, of the drill bit; grouting holes 6 are formed in the surface of the catheter body 1 at intervals, and the grouting holes 6 penetrate through the catheter body 1.

The implementation mode specifically comprises the following steps: when the drill bit is used, at least three symmetrically distributed grooves 3 are cut at the end of the catheter body 1, then the drill bit 2 is partially inserted into the end of the catheter body 1 and fixed in a high-temperature welding mode, and the welding area can be increased through the grooves 3, so that the drill bit 2 is further reinforced, and the problem of falling off does not occur during the use; the screw thread 4 steel bars are adopted to replace the guide pipe body 1 to serve as the drill bit 2, so that the head strength of the drill bit 2 is greatly improved, drilling is facilitated, the drilling efficiency is improved, the friction force during drilling can be increased through the screw threads 4 outside the drill bit 2, the self drilling is easier, and the working efficiency is high; the grouting operation is achieved by passing through the grouting holes 6.

Example 2. In the tunnel advance small catheter for the sandy pebble layer, a cavity 5 is formed in the catheter body 1 on the basis of the embodiment 1, and the drill bit 2 is located in the cavity 5. The part of the drill bit 2 located in the cavity 5 is about 30cm, the exposed part of the drill bit 2 is about 20cm, and the fixation is more firm.

Example 3. In the tunnel advance small guide pipe for the sandy pebble layer, based on the embodiment 2, the drill bit 2 is made of a threaded 4 steel bar material, and the diameter of a bracket of the drill bit 2 is matched with that of the cavity 5 or applicable steel bars are selected, so that the gap after the small guide pipe is inserted is reduced as much as possible. The screw thread 4 reinforced bar material is made into high strength, is not easy to deform and is convenient to drill in.

Example 4. In the embodiment, on the basis of embodiment 3, at least three slots 3 are provided, and three slots 3 are symmetrically distributed along the axis of the catheter body 1. The welding area can be increased through the grooves 3, so that the drill bit 2 is further reinforced, and the problem of falling off can be avoided during use.

Example 5. In this embodiment, on the basis of embodiment 4, the length of the slot 3 is set to be 10-15cm. Thereby increasing the welding area and further strengthening the drill bit 2.

Example 6. In the embodiment, based on the embodiment 5, according to practical requirements, one end of the drill bit 2 far away from the catheter body 1 can be processed into a cone shape, so that the drill bit 2 can conveniently drill.

Example 7. In the embodiment, based on the embodiment 5, according to practical requirements, one end of the drill bit 2 far away from the catheter body 1 can be processed into a round angle shape, so that the drill bit 2 can conveniently drill in.

Example 8. In the embodiment, based on the embodiment 5, according to practical requirements, one end of the drill bit 2 far away from the catheter body 1 can be processed into a plane, so that the drill bit 2 can conveniently drill.

The pipe body 1 of the foregoing embodiment may be a conventional hot rolled seamless steel pipe or alloy pipe according to practical situations, and in order to improve torsional and bending strength of the pipe body during drilling, the pipe length is preferably 3-3.5 m, which is a minimum recommended value in the specification, so that the longitudinal spacing can be reduced while ensuring the lap joint length.

The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, within the scope of the present application, should make equivalent substitutions or modifications according to the technical solution and the concept of the present application, and should be covered by the scope of the present application.

Claims (7)

1. Tunnel advance small duct for sandy pebble layer, comprising duct body (1), characterized in that: a cavity (5) is formed in the catheter body (1), one end of the catheter body (1) is connected with the drill bit (2), and the tail end of the drill bit (2) is arranged in the cavity (5); the catheter body (1) is provided with a plurality of grooves (3) at the joint of the drill bit (2).

2. A tunnel advance small pipe for a sand-pebble layer according to claim 1, characterized in that: the part of the drill bit (2) extending out of the catheter body (1) is provided with threads (4).

3. A tunnel advance small pipe for a sand-pebble layer according to claim 1, characterized in that: the grooves (3) are formed through the pipe wall of the catheter body (1), at least three grooves (3) are formed, and the grooves (3) are symmetrically distributed in the axis of the catheter body (1).

4. A tunnel advance small pipe for a sand-pebble layer according to claim 1, characterized in that: the length of the slot (3) is set to be 10-15cm.

5. A tunnel advance small pipe for a sand-pebble layer according to claim 1, characterized in that: a group of grouting holes (6) are formed in the catheter body (1) in a penetrating mode at intervals.

6. A tunnel advance small pipe for a sand-pebble layer according to claim 1, characterized in that: one end of the drill bit (2) extending out of the catheter body (1) is arranged to be conical, round or flat.

7. A tunnel advance small pipe for a sand-pebble layer according to claim 1, characterized in that: the drill bit (2) is made of a twisted steel material.