CN220365584U

CN220365584U - Deep hole section grout stop plug

Info

Publication number: CN220365584U
Application number: CN202320940943.7U
Authority: CN
Inventors: 陈晓东; 钟久安; 冯杨文; 张涌泉; 臧鹏; 何非凡
Original assignee: Sichuan Gongtuo Geotechnical Technology Co ltd
Current assignee: Sichuan Gongtuo Geotechnical Technology Co ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2024-01-19
Anticipated expiration: 2033-04-24

Abstract

A deep hole section grout stop plug relates to the field of engineering construction and comprises a connecting piece and a grout stop assembly, wherein the connecting piece is detachably connected below a drill rod in a right-handed threaded mode, a central hole penetrating up and down is formed in the middle of the connecting piece, a grout inlet penetrating up and down is formed in the edge of the connecting piece, the central hole is communicated with an inner channel of the drill rod, and the grout inlet is externally connected with a hose; the slurry stopping component is detachably connected below the connecting piece through left-handed threads, and comprises a slurry outlet pipe, a bag and a connecting seat, wherein the slurry outlet pipe is connected with the connecting piece, the slurry outlet pipe is communicated with the central hole, the bag is used for receiving slurry from the slurry inlet hole, the bag is made of a canvas bag, and the connecting seat and the slurry outlet pipe are both plastic pieces. The utility model can avoid the situation that the deep hole section of the stratum is grouted to cause the grouting plug to be buried and the drilling to be scrapped when the earth surface grouting is adopted for the tunnel in the deep part of the stratum.

Description

Deep hole section grout stop plug

Technical Field

The utility model relates to the field of engineering construction, in particular to a deep hole section grout stop plug.

Background

In the tunnel construction process, when the tunnel in the stratum deep part is inconvenient to adopt advanced pre-grouting water stopping or reinforcing of the tunnel face in the tunnel in the tunneling process, grouting can be carried out from the surface drilling to the tunnel elevation. When grouting is only needed for a hole section with the depth of 120m, a grouting stop plug can be adopted to be blocked at the position with the depth of 120m and below.

The inventor researches find that after the existing steel-containing part grout stop plugs such as hydraulic plugs and slip grout stop plugs are used for clamping and grouting at the position with the depth of 120m, the situation that the plugs are buried and cannot be removed out of holes smoothly due to factors such as broken stratum and blocking of grout can occur, and drilling is scrapped.

Disclosure of Invention

The utility model aims to provide a deep hole section grouting stop plug which can avoid the condition that a tunnel in the deep part of a stratum is scrapped due to the fact that the grouting stop plug is buried after grouting of the deep hole section when surface grouting is adopted.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a deep bore section grout stop plug comprising:

the connecting piece is detachably connected below the drill rod through right-handed threads, a central hole penetrating up and down is formed in the middle of the connecting piece, a slurry inlet penetrating up and down is formed in the edge of the connecting piece, the central hole is communicated with an inner channel of the drill rod, and the slurry inlet is externally connected with a hose;

the slurry stopping assembly is detachably connected to the lower portion of the connecting piece through left-handed threads, the slurry stopping assembly comprises a slurry outlet pipe, a bag and a connecting seat, the slurry outlet pipe is connected with the connecting seat, the connecting seat is connected with the connecting piece, the slurry outlet pipe is communicated with the central hole, the bag is used for receiving slurry from the slurry inlet hole, the bag is made of a canvas, and the connecting seat and the slurry outlet pipe are both plastic pieces.

In an alternative embodiment, the top of the connector is provided with a right-handed internal thread for connecting the drill rod.

In an alternative embodiment, the bottom of the connecting piece is provided with a left-handed external thread, and the left-handed external thread is used for connecting the connecting seat.

In an alternative embodiment, the connecting seat is provided with a connecting hole for communicating the central hole and the slurry outlet pipe.

In an alternative embodiment, one end of the bag is arranged on the connecting seat, and the other end is arranged on the pulp outlet pipe.

In an alternative embodiment, the top surface of the connecting seat is provided with an annular groove, the bottom of the annular groove of the connecting seat is provided with a slurry outlet hole penetrating up and down, the slurry inlet hole is communicated with the annular groove, and the outlet end of the slurry outlet hole is positioned in the bag.

The embodiment of the utility model has the beneficial effects that:

the utility model provides a deep hole section grout stop plug, which is characterized in that a connecting piece is detachably connected below a drill rod through right-handed threads, the middle part of the connecting piece is provided with a center hole penetrating up and down, the edge of the connecting piece is provided with a grout inlet penetrating up and down, the center hole is communicated with an inner channel of the drill rod, and the grout inlet is externally connected with a hose; the slurry stopping component is detachably connected below the connecting piece through left-handed threads and comprises a slurry outlet pipe, a bag and a connecting seat, wherein the slurry outlet pipe is connected with the connecting piece, the slurry outlet pipe is communicated with the central hole, the bag is used for receiving slurry from the slurry inlet hole, the bag is made of a canvas bag, and the connecting seat and the slurry outlet pipe are plastic pieces. According to the utility model, the connecting piece is in a detachable structure, so that in the construction process, after grouting is completed on the deep hole section, particularly when the depth exceeds 120m, the connecting piece can be detached, the grouting stopping assembly is left in the hole, then the grouting stopping assembly is penetrated through by diamond, and drilling and grouting at the next stage are continued.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a deep hole section grout stop plug according to embodiments of the present utility model;

fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Icon:

100-connecting piece; 110-a central hole; 120-right-handed internal threads; 130-left-handed external threads; 140-slurry inlet holes; 200-a slurry stopping assembly; 210-a slurry outlet pipe; 220-connecting seats; 221-connecting holes; 222-a slurry outlet hole; 223-annular groove; 300-pouch; 400-hose; 500-drill pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the deep hole section grout stop plug provided in this embodiment includes a connecting piece 100 and a grout stop assembly 200, wherein the connecting piece 100 is detachably connected below a drill rod 500, a central hole 110 penetrating up and down is provided in the middle of the connecting piece 100, and the central hole 110 is communicated with an internal channel of the drill rod 500; the grout stop assembly 200 is detachably connected below the connector 100, and the grout stop assembly 200 comprises a grout pipe 210, wherein the grout pipe 210 is communicated with the central hole 110.

In detail, the slurry is poured from the inner passage of the drill pipe 500, and then is injected into a proper position through the central hole 110 and the slurry outlet pipe 210, and the connection member 100 is detachably connected with the drill pipe 500 and the slurry stopping assembly 200, and the specific detachable structure can be selectively designed according to practical situations.

It can be appreciated that in this embodiment, the connecting piece 100 is configured to be a detachable structure, so, in the construction process, after grouting is completed in the deep hole section, especially when the depth exceeds 120m, the connecting piece 100 can be detached, the grouting stop assembly 200 is left in the hole, then the grouting stop assembly 200 is penetrated through by diamond, and drilling and grouting in the next stage are continued.

Further, as shown in fig. 2, the top of the connection 100 is provided with a right-handed internal thread 120, the right-handed internal thread 120 being used to connect the drill rod 500. In detail, the drill rod 500 is provided with an external thread at one end thereof connected to the connector 100, the drill rod 500 is in threaded connection with the connector 100, the above-mentioned detachable connection structure is described in detail, the drill rod 500 and the connector 100 can be locked by rotating the drill rod 500, and the connector 100 can be detached from one end of the drill rod 500 by reverse rotation.

Further, the bottom of the connector 100 is provided with a left-hand external thread 130, and the left-hand external thread 130 is used for connecting the grout stop assembly 200. In detail, the connection member 100 is screwed to the grout stop assembly 200, and the above-mentioned detachable connection between the connection member 100 and the grout stop assembly 200 is described, so that the connection member 100 and the grout stop assembly 200 can be locked by rotating the connection member 100, and the connection member 100 and the grout stop assembly 200 can be separated by reversely rotating the connection member 100.

Specifically, the right-hand internal threads 120 and the left-hand external threads 130 on the connection 100 are threaded in opposite directions. It will be appreciated that when the drill pipe 500, the connector 100 and the grout stop assembly 200 are tightly connected, the grout stop assembly 200 is fixed, and the drill pipe 500 is further fastened to the connector 100 by continuing to rotate the drill pipe 500, and the connection between the connector 100 and the grout stop assembly 200 is separated under the rotation of the connector 100 due to the opposite directions of the threads of the right-handed internal threads 120 and the left-handed external threads 130 on the connector 100. In actual operation, after deep hole grouting is completed, the grout stopping assembly 200 is fixed, the connecting piece 100 is separated from the grout stopping assembly 200 after the drill rod 500 is rotated, the drill rod 500 is used for extracting a deep hole, the grout stopping assembly 200 is left in the deep hole, and finally a diamond drill bit is used for punching through the grout stopping assembly 200, and drilling and grouting of each section below the deep hole are continued.

As shown in fig. 2, in this embodiment, the slurry stopping assembly 200 further includes a connecting seat 220, two ends of the connecting seat 220 are respectively connected to the connecting piece 100 and the slurry outlet pipe 210, and a connecting hole 221 for communicating the central hole 110 and the slurry outlet pipe 210 is provided on the connecting seat 220. In detail, the connection base 220 is provided with an internal thread to be coupled with the left-hand external thread 130 of the lower end of the connection member 100.

Further, the connection base 220 and the grout outlet pipe 210 are all plastic members. It can be appreciated that the plastic piece is provided to facilitate the penetration of the diamond bit, and has certain strength, so that the diamond bit is not easy to damage when the diamond bit is stretched into the deep hole.

In this embodiment, the slurry dispenser further includes a bag 300, wherein one end of the bag 300 is disposed on the connecting seat 220, and the other end is disposed on the slurry outlet pipe 210. In detail, the function of the bladder 300 is to fix the stopper at a designated depth, and the bladder 300 is expanded by injecting slurry into the bladder 300, and when the bladder 300 reaches a maximum expansion degree, the outer diameter of the bladder 300 is 10mm to 200mm larger than the bore diameter of the bore hole, so that the stopper can be blocked on the designated bore wall.

On the other hand, the pouch 300 is made of a canvas bag. It will be appreciated that since the bladder 300 is provided on the grout stop assembly 200, the bladder 300 is required to be diamond perforated with the grout stop assembly 200, and the bladder 300 is made of a canvas bag, although plastic bags may be used in other embodiments.

In this embodiment, the connector 100 further includes a hose 400, a pulp inlet 140 penetrating vertically is provided on the connector 100, a pulp outlet 222 penetrating vertically is provided on the connector 220, the hose 400 is connected to the pulp inlet 140, the pulp inlet 140 is communicated with the pulp outlet 222, and an outlet end of the pulp outlet 222 is located inside the bag 300. In detail, the hose 400 and the slurry inlet 140 may be glued or screwed, so that the hose 400 is set to rotate along with the drill pipe 500, and the hose 400 is driven to rotate due to the flexibility of the hose 400, and the hose 400 is not affected even if fragments above the deep hole block the hose 400 during the rotation. It will be appreciated that the slurry in the hose 400 enters the slurry outlet 222 through the slurry inlet 140, and then flows into the bladder 300 through the slurry outlet 222, and the bladder 300 continues to increase under the slurry filling and finally snaps into place in the deep hole.

Finally, the top surface of the connection seat 220 is provided with an annular groove 223, and the annular groove 223 is communicated with the feeding hole and the slurry outlet hole 222. The purpose of annular groove 223 is to be seen as letting in pulp inlet 140 and pulp outlet 222.

The embodiment also provides specific steps, which are as follows:

1. when the bag 300 is manufactured, the outer diameter of the bag 300 after being filled with slurry and expanded is 10 mm-20 mm larger than the bore diameter of the drilling hole, so that the bag 300 can be firmly blocked on the wall of the hole.

2. When holes with the diameter of phi 91 mm-phi 110mm are drilled from the ground surface to the tunnel elevation and grouting is only carried out on hole sections with the depth of 120m, the embodiment is lowered to the position of 120m and the depth through the drill pipe 500 with the diameter of phi 50mm, and the hose 400 with the diameter of phi 12 mm-phi 16mm is lowered into the hole along with the hole.

3. The expanding plug quick setting slurry is injected into the bag 300 from the hose 400 through the pulp inlet 140 with phi 12mm of the counter-filament head, the wide ring pulp groove with phi 12mm of the counter-filament seat and the pulp outlet 222 with phi 12mm, so that the bag 300 expands to block the hole wall and quick setting is strong.

4. After the rapid hardening slurry in the bag 300 is solidified to be equal in strength and firmly clamps the hole wall and seal, the water-stopping reinforced grouting material is injected into the hole Duan Deceng to be poured through the drill pipe 500, the central hole 110, the connecting hole 221 and the phi 16-phi 25mm grouting pipe 210, so that the purposes of grouting water stopping and reinforcing are achieved.

5. After the grouting is completed, the drill rod 500 is rotated forward to open the connecting piece 100 and the connecting seat 220, and the drill rod 500, the connecting piece 100 and the hose 400 are lifted out of the holes. And then, adopting diamond with the diameter of phi 91mm to phi 110mm to sweep through the grout stop plug, and continuously drilling and grouting the lower sections of the grout stop plug.

The deep hole section grout stop plug provided by the embodiment has the following advantages:

in this embodiment, the connecting piece 100 is configured as a detachable structure, so, in the construction process, after grouting is completed on the deep hole section, especially when the depth exceeds 120m, the connecting piece 100 can be detached, the grout stopping assembly 200 is left in the hole, then the grout stopping assembly 200 is penetrated through by diamond, and the drilling and grouting in the next stage are continued.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A deep hole section grout stop plug comprising:

2. The deep hole section grout stop of claim 1, wherein the top of the connector is provided with right-handed internal threads for connecting the drill pipe.

3. The deep hole section grout stop plug of claim 1, wherein the bottom of the connector is provided with left-handed external threads for connecting to the connector base.

4. The deep hole section grout stop plug of claim 1 wherein said connecting seat is provided with a connecting hole communicating said central hole with said grout outlet tube.

5. The deep hole section grout stop of claim 1 wherein one end of the bladder is disposed on the connecting seat and the other end is disposed on the grout outlet tube.

6. The deep hole section grout stop plug of claim 1, wherein the top surface of the connecting seat is provided with an annular groove, the connecting seat is provided with a grout outlet hole penetrating up and down at the bottom of the annular groove, the grout inlet hole is communicated with the annular groove, and the outlet end of the grout outlet hole is positioned in the bag.