阅读说明：本技术 一种密封型注浆前端装置及注浆施工方法 (Sealed grouting front end device and grouting construction method ) 是由 张帆 何小玲 钱峰 黄斌 李永迪 黄永清 荀晨栋 施承欢 杨化振 于 2020-07-30 设计创作，主要内容包括：本发明公开了一种密封型注浆前端装置及注浆施工方法,装置包括：保护套管,第一端可拆卸连接于一锥形头；连接短管,的管壁设置有注浆孔,保护套管通过套设于连接短管的外侧遮蔽注浆孔,连接短管和保护套管之间可相对移动设置且设置有防脱结构；注浆管接管,第一端可拆卸连接于连接短管的远离锥形头的一端上,保护套管的第一端套设于注浆管接管的第一端的外侧且设置有密封圈。注浆前端装置在土体里钻进时,应处于闭合状态,由于增设了密封圈,使前端装置处于密闭状态,避免泥沙从注浆孔进入装置内导致堵塞,且当注浆管到达设计注浆位置时,对注浆管内施加注浆压力,保护套管受到向前的推力,从而打开了装置,露出注浆孔,进行注浆。(The invention discloses a sealed grouting front end device and a grouting construction method, wherein the device comprises: the first end of the protective sleeve is detachably connected with a conical head; the pipe wall of the short connecting pipe is provided with a grouting hole, the protective sleeve shields the grouting hole by being sleeved outside the short connecting pipe, and the short connecting pipe and the protective sleeve can be arranged in a relatively movable mode and are provided with anti-falling structures; the grouting pipe is connected with the pipe, the first end of the grouting pipe is detachably connected with one end of the short connecting pipe, which is far away from the conical head, and the first end of the protective sleeve is sleeved on the outer side of the first end of the grouting pipe connecting pipe and is provided with a sealing ring. When the grouting front end device drills in a soil body, the grouting front end device is in a closed state, the front end device is in a closed state due to the fact that the sealing ring is additionally arranged, silt is prevented from being blocked in the grouting hole entering device, grouting pressure is applied to the grouting pipe when the grouting pipe reaches a designed grouting position, the protective sleeve is pushed forwards, and therefore the device is opened, the grouting hole is exposed, and grouting is conducted.)

1. A sealed grouting front end device, comprising:

the first end of the protective sleeve is detachably connected with a conical head;

the pipe wall of the connecting short pipe is provided with a grouting hole, the protective sleeve covers the grouting hole by being sleeved on the outer side of the connecting short pipe, and the connecting short pipe and the protective sleeve can be arranged in a relatively movable mode and are provided with anti-falling structures; and

the grouting pipe connecting pipe is characterized in that the first end of the grouting pipe connecting pipe is detachably connected to one end of the short connecting pipe, which is far away from the conical head, and the first end of the protective sleeve is sleeved on the outer side of the first end of the grouting pipe connecting pipe and provided with a sealing ring.

2. The sealed grouting front end device according to claim 1, characterized in that: the cone-shaped head is in threaded connection with the first end of the protective sleeve.

3. The sealed grouting front end device according to claim 2, characterized in that: the inner wall of the first end of the protective sleeve is provided with first threads, the outer wall of the flat end of the conical head is provided with second threads, and the first threads are screwed with the second threads.

4. The sealed grouting front end device according to claim 1, characterized in that: the anti-disengaging structure including set up in the first spacing ring of the second end inner wall of protective case and set up in the second spacing ring of the first end outer wall of junction pipe, the external diameter of second spacing ring is greater than the internal diameter of first spacing ring.

5. The sealed grouting front end device according to claim 4, characterized in that: and the first end of the grouting pipe adapter is in threaded connection with the second end of the short connecting pipe.

6. The sealed grouting front end device according to claim 5, characterized in that: the inner wall of the first end of the grouting pipe connecting pipe is provided with a third thread, the outer wall of the second end of the short connecting pipe is provided with a fourth thread, and the third thread and the fourth thread are mutually screwed.

7. The sealed grouting front end device according to claim 6, characterized in that: the inner wall of the second end of the protective sleeve is sleeved on the outer wall of the first end of the grouting pipe connecting pipe, and the outer wall of the first end of the grouting pipe connecting pipe is sleeved with the sealing ring.

8. The sealed grouting front end device according to claim 7, characterized in that: the edge of the inner wall of the second end of the protective sleeve is provided with a third limiting ring, and the sealing ring is abutted against the third limiting ring.

9. The sealed grouting front end device according to claim 1, characterized in that: and a threaded pipe for connecting the grouting pipe is arranged at the second end of the grouting pipe connecting pipe.

10. A grouting construction method using the sealed type grouting front end device according to claim 1, comprising:

providing the conical head, the protective sleeve, the short connecting pipe and the grouting pipe connecting pipe which are connected in sequence;

the second end of the protective sleeve is tightly sleeved outside the first end of the grouting pipe connecting pipe, and the second end of the grouting pipe connecting pipe is connected to the grouting pipe;

inserting the conical head downwards into a soil body, performing pipe discharging operation, and enabling the sealed grouting front end device to be in a sealed state in the pipe discharging process by using the sealing ring;

when the lower pipe of the grouting pipe reaches the designed grouting position, grouting pressure is applied to the grouting pipe, the protective sleeve and the conical head are pushed to break loose the first end of the grouting pipe connecting pipe downwards, the grouting hole in the short connecting pipe is exposed, and grouting operation is performed.

Technical Field

The invention relates to the technical field of underground engineering construction, in particular to a sealed grouting front end device opened by means of pump pressure and a grouting construction method.

Background

Disclosure of Invention

The invention aims to provide a sealed grouting front end device and a grouting construction method, and solves the technical problem that a grouting hole in the front end of a grouting pipe in the prior art is easily blocked by soil to affect the grouting effect.

The present invention in a first aspect provides a sealed grouting front end device, comprising:

the first end of the protective sleeve is detachably connected with a conical head;

the pipe wall of the connecting short pipe is provided with a grouting hole, the protective sleeve covers the grouting hole by being sleeved on the outer side of the connecting short pipe, and the connecting short pipe and the protective sleeve can be arranged in a relatively movable mode and are provided with anti-falling structures; and

the grouting pipe connecting pipe is characterized in that the first end of the grouting pipe connecting pipe is detachably connected to one end of the short connecting pipe, which is far away from the conical head, and the first end of the protective sleeve is sleeved on the outer side of the first end of the grouting pipe connecting pipe and provided with a sealing ring.

As an embodiment of the device according to the invention, the cone-shaped head is screwed to the first end of the protective sleeve.

In an embodiment of the device of the present invention, the inner wall of the first end of the protection sleeve is provided with a first thread, the outer wall of the flat end of the cone head is provided with a second thread, and the first thread and the second thread are screwed together.

As an embodiment of the device, the anti-dropping structure includes a first limiting ring disposed on the inner wall of the second end of the protective sleeve and a second limiting ring disposed on the outer wall of the first end of the junction pipe, and the outer diameter of the second limiting ring is greater than the inner diameter of the first limiting ring.

As an embodiment of the apparatus of the present invention, the first end of the grout pipe nipple is threadedly connected to the second end of the connecting stub.

As an embodiment of the apparatus of the present invention, the inner wall of the first end of the grouting pipe adapter is provided with a third thread, the outer wall of the second end of the junction pipe is provided with a fourth thread, and the third thread and the fourth thread are screwed together.

As an embodiment of the apparatus of the present invention, the inner wall of the second end of the protection sleeve is sleeved on the outer wall of the first end of the grouting pipe connection pipe, and the sealing ring is sleeved on the outer wall of the first end of the grouting pipe connection pipe.

As an embodiment of the device, a third limiting ring is disposed at an edge of an inner wall of the second end of the protective sleeve, and the sealing ring abuts against the third limiting ring.

As an embodiment of the apparatus of the present invention, the second end of the grouting pipe adapter is provided with a threaded pipe for connecting the grouting pipe.

A second aspect of the present invention provides a grouting construction method, including:

providing the conical head, the protective sleeve, the short connecting pipe and the grouting pipe connecting pipe which are connected in sequence;

the second end of the protective sleeve is tightly sleeved outside the first end of the grouting pipe connecting pipe, and the second end of the grouting pipe connecting pipe is connected to the grouting pipe;

inserting the conical head downwards into a soil body, performing pipe discharging operation, and enabling the sealed grouting front end device to be in a sealed state in the pipe discharging process by using the sealing ring;

when the lower pipe of the grouting pipe reaches the designed grouting position, grouting pressure is applied to the grouting pipe, the protective sleeve and the conical head are pushed to break loose the first end of the grouting pipe connecting pipe downwards, the grouting hole in the short connecting pipe is exposed, and grouting operation is performed.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

(1) when the grouting front-end device drills in a soil body, the grouting front-end device is in a closed state, and the front-end device is in a closed state due to the addition of the sealing ring, so that the blockage caused by the fact that silt enters the grouting front-end device from a grouting hole is avoided;

(2) when the grouting pipe reaches the designed grouting position, grouting pressure is applied to the grouting pipe, the protective sleeve is pushed forwards, and therefore the device is opened, the grouting hole is exposed, and grouting is conducted;

(3) when the grouting front end device is cleaned, due to the fact that the components in the device are connected through threads, the grouting front end device can be conveniently disassembled and assembled, and cleaning and replacement are convenient.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a sealed grouting front end device in a drilling pipe-down state according to an embodiment of the present invention.

Fig. 2 is a schematic view of a sealed grouting front end device according to an embodiment of the present invention in a grouting mode.

Fig. 3 is a schematic diagram of a sealed grouting front end device in a disassembled and cleaned state according to an embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solution of the present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 3, a first aspect of the present embodiment provides a sealed grouting front end device, which specifically includes: a protective sleeve 11, a conical head 12, a short connecting pipe 13, a grouting pipe connecting pipe 14 and a sealing ring 15. Specifically, the method comprises the following steps:

the first end of the protective sleeve 11 is removably attached to the flat end of the conical head 12 (i.e., the end opposite the conical tip). Preferably, the cone head 12 is connected to the first end of the protection sleeve 11 by a screw connection manner, wherein a first screw thread is arranged on an inner wall of the first end of the protection sleeve 11, a second screw thread is arranged on an outer wall of the flat end of the cone head 12, and the first screw thread and the second screw thread are screwed together.

The pipe wall of the junction pipe 13 is provided with a plurality of grouting holes 131 (the number of the grouting holes is not limited and is not limited to the arrangement form shown in the figure, and can be changed according to grouting requirements), the second end of the protection sleeve 11 is sleeved outside the junction pipe 13 and can move relatively between the protection sleeve and the junction pipe, the moving range of the protection sleeve 11 can cover the length of the whole junction pipe 13, when the second end of the protection sleeve 11 moves to the second end of the junction pipe 13, the protection sleeve 11 completely covers the grouting holes 131 on the junction pipe 13, and silt can be prevented from entering the device from the grouting holes 131 to cause blockage.

Furthermore, a separation-preventing structure is arranged between the connecting short pipe 13 and the protecting sleeve 11, so that the connecting short pipe 13 and the protecting sleeve 11 can be prevented from moving excessively and separating from each other. In this embodiment, the anti-releasing structure includes a first limiting ring 161 disposed on the inner wall of the second end of the protection sleeve 11 and a second limiting ring 162 disposed on the outer wall of the first end of the junction pipe 13, and the outer diameter of the second limiting ring 162 is greater than the inner diameter of the first limiting ring 161.

The first end of the grouting pipe connecting pipe 14 can be detachably connected to the second end of the short connecting pipe 13 far away from the conical head 12, the first end of the protective sleeve 11 is simultaneously sleeved on the outer side of the first end of the grouting pipe connecting pipe 14, and a sealing effect is achieved by arranging the sealing ring 15 between the first end and the outer side, the sealing ring 15 is preferably a rubber sealing ring, elastic sealing rings made of silica gel materials and the like can be adopted, certain elasticity is met, the device can be kept in a closed state in the pipe descending process of the sealed grouting front end device, and the protective sleeve can be separated from the grouting pipe connecting pipe under the condition that the protective sleeve is pushed by grouting pressure.

Wherein a first end of the grouting pipe adapter 14 is connected to a second end of the junction stub 13 by means of a threaded connection. The second end of the grout pipe nipple 14 is provided with a threaded pipe 141 to which the grout pipe is connected.

In this embodiment, the inner wall of the first end of the grouting pipe connection pipe 14 is provided with a third thread, the outer wall of the second end of the connection short pipe 13 is provided with a fourth thread, the third thread and the fourth thread are screwed together, and the grouting pipe connection pipe 14 and the connection short pipe 13 can be conveniently detached and installed during cleaning and replacement by adopting a threaded connection mode.

The inner wall of the second end of the protective sleeve 11 is sleeved on the outer wall of the first end of the grouting pipe connecting pipe 14, the sealing ring 15 is sleeved on and cemented on the outer wall of the first end of the grouting pipe connecting pipe 14, one or more sealing rings can be arranged, the number of the sealing rings is more, the sealing capability is better, however, the sealing capability is not too much, otherwise, the protective sleeve 11 can be smoothly struggled from the grouting pipe connecting pipe 14 during grouting, and 1-2 sealing rings are generally arranged.

Further, the edge of the inner wall of the second end of the protection sleeve 11 is provided with a third limiting ring 163, and the sealing ring 15 can abut against the third limiting ring 163 to enhance the sealing effect.

The invention also provides a grouting construction method realized by using the sealed grouting front end device in the embodiment, which specifically comprises the following operation steps:

step S1: providing a conical head 12, a protective sleeve 11, a short connecting pipe 13 and a grouting pipe connecting pipe 14 which are connected in sequence;

step S2: the second end of the protective sleeve 11 is tightly sleeved outside the first end of the grouting pipe connecting pipe 14 of the grouting pipe 1, the second end of the grouting pipe connecting pipe 14 is connected with a grouting pipe (not shown in the figure), and a gap between the inner wall of the second end of the protective sleeve 11 and the outer wall of the first end of the grouting pipe connecting pipe 14 is sealed through a sealing ring 15;

step S3: the conical head 12 is inserted into a soil body (not shown in the figure) downwards, pipe discharging operation is carried out, the sealing ring 15 is utilized to enable the sealing type grouting front end device to be in a sealing state in the pipe discharging process, and silt is prevented from entering the device from a grouting hole and a gap between the protective sleeve 11 and the grouting pipe connecting pipe 14 to cause blockage;

step S4: when the lower pipe of the grouting pipe reaches the designed grouting position, grouting pressure is applied to grouting in the grouting pipe, the protective sleeve 11 and the conical head 12 are pushed to break loose the first end of the grouting pipe connecting pipe 14 downwards, the sealing ring connection between the protective sleeve 11 and the grouting pipe connecting pipe 14 is overcome, the grouting hole 131 in the short connecting pipe 13 is exposed, and grouting operation is carried out.

In addition, when the sealed grouting front end device needs to be cleaned, the protective sleeve 11 and the conical head 12, and the connecting short pipe 13 and the grouting pipe connecting pipe 14 are in threaded connection, so that the device can be disassembled into parts, and cleaning and replacement are convenient.

Compared with the prior art, the sealed grouting front end device and the grouting construction method have the following advantages:

(1) when the grouting front-end device drills in a soil body, the grouting front-end device is in a closed state, and the front-end device is in a closed state due to the addition of the sealing ring, so that the blockage caused by the fact that silt enters the grouting front-end device from a grouting hole is avoided;

(2) when the grouting pipe reaches the designed grouting position, grouting pressure is applied to the grouting pipe, the protective sleeve is pushed forwards, and therefore the device is opened, the grouting hole is exposed, and grouting is conducted;

(3) when the grouting front end device is cleaned, due to the fact that the components in the device are connected through threads, the grouting front end device can be conveniently disassembled and assembled, and cleaning and replacement are convenient.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and are all included in the scope of the present invention.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.