CN115522532A - A locking grouting device and method in a hole - Google Patents

Abstract

The invention discloses a locking grouting device and method in a hole. The device includes a grouting pipe and a locking structure sleeved outside the grouting pipe. The locking structure includes an upper connecting piece, a lower connecting piece and a deformed locking piece. The upper connecting piece is connected to the top of the deformation locking piece, and the lower connecting piece is connected to the bottom of the deformation locking piece. The threaded connection of the grouting pipe, the pitch of the threaded connection between the upper part of the grouting pipe and the upper connecting part is smaller than the pitch of the threaded connection between the upper part of the grouting pipe and the lower connecting part; the method includes: forming a grouting hole in the drilled hole; Install the structure into the grouting hole; pass the grouting pipe through the locking structure, and when the grouting pipe is rotated downward, the deformed locking member expands and expands outwards, and fits closely with the wall of the grouting hole; the grouting pipe and the grouting equipment connected for grouting; the invention solves the problem that the grouting conduit slips and falls off, which affects the grouting effect.

Description

A locking grouting device and method in a hole

technical field

The invention relates to the technical field of geotechnical engineering grouting, in particular to an in-hole locking grouting device and method.

Background technique

With the rapid development of the economy, a large number of new infrastructures and stocks are getting bigger and bigger. For example, the mileage of road projects will increase significantly every year, and the number of underground infrastructure such as tunnels will increase day by day. Due to improper design and construction in the early stage or improper maintenance in the later stage, diseases gradually appeared, such as cracks in concrete structures, voids and cavities in roads, subsidence in pipelines, settlement in high-speed railway track slabs, etc., which seriously affected the safety of the project and daily life. These problems occurred It is often necessary to control the disease, and the use of non-excavation grouting is the main method commonly used at present.

Existing grouting devices such as patent No. 202110948644.3, a grout controllable rotary grouting head and grouting method, rotate the grouting head, and cut the soil body through the rotation of the grouting head, so that a controllable cavity appears in the soil body of the pile , Compared with traditional grouting, it effectively overcomes the disadvantages of traditional grouting, such as the difficulty of controlling the flow of grout and low utilization rate of grout. However, high-pressure grouting is often used for the treatment of reinforcement and lifting diseases, and the requirements for the connection of the grouting device are very high. The conventional plug-in grouting head or the simple grouting device with a leather sleeve cannot meet the requirements of high-pressure grouting. The entire grouting structure is unstable, which affects the efficiency and effect of grouting.

Contents of the invention

The purpose of the invention is to provide a locking grouting device and method in the hole, which solves the problem that the conventional plug-in grouting head or the simple external leather grouting device cannot Meeting the requirements of high-pressure grouting cannot ensure the quality of engineering repairs, resulting in waste of grout materials, affecting the efficiency and effect of grouting, and even safety accidents.

The present invention is achieved in this way, a locking grouting device in a hole, the device includes a grouting pipe and a locking structure sleeved outside the grouting pipe,

The locking structure includes an upper connecting piece, a lower connecting piece and a deformed locking piece, the upper connecting piece is connected to the top of the deformed locking piece, the lower connecting piece is connected to the bottom of the deformed locking piece, The grouting pipe is a hollow pipe that is open up and down and has an external thread on the surface. Both the upper connector and the lower connector are threadedly connected to the grouting pipe. The pitch of the threaded joint of the connector is smaller than the pitch of the threaded connection between the grouting pipe and the lower connector, and the deformation locking member expands or contracts when the grouting pipe is rotated.

The threads on the grouting pipe are in the same direction, and when the grouting pipe is rotated, since the thread pitch of the thread connection between the grouting pipe and the upper connector is smaller than that of the upper connector and the lower connector on the grouting pipe The pitch of the threaded connection, the upper connecting piece and the lower connecting piece move in the same direction, but due to the different pitches, when the grouting pipe is rotated, the moving distance of the lower connecting piece is greater than that of the upper connecting piece. By changing the rotation direction of the grouting pipe, the Expansion or contraction of the deformation locking part, when the deformation locking part is under contraction, it is convenient to install into the grouting hole, and after entering the grouting hole, continue to rotate the grouting pipe to make the upper and lower connectors move upwards, thereby Realize the expansion and outward expansion of the deformation locking part, and closely fit with the inner wall of the grouting hole to complete the locking, and the position of the grouting pipe is fixed to ensure the grouting effect.

Both the upper connecting piece and the lower connecting piece are nuts, and the inner wall is provided with an internal thread matched with the grouting pipe. The upper connecting piece, the deformation locking piece and the lower connecting piece are formed by one welding process.

A further technical solution of the present invention is: the deformation locking member includes a conical part, an expandable ring and a cylindrical part connected in sequence, the expandable ring is provided with a vertical dividing slit, and the conical part is connected to the cylindrical part. The upper connecting piece is connected, and the cylindrical portion is connected with the lower connecting piece.

The tapered part is used for connecting the expandable ring and the upper connecting piece, and the cylindrical part is used for connecting the lower connecting piece and the expandable ring.

A further technical solution of the present invention is: a sealing ring is sheathed on the outer side of the connection between the tapered portion and the upper connecting piece.

The sealing ring is made of rubber, which not only increases the friction between the locking structure and the inner wall of the grouting hole during installation, but also plays a sealing role during the grouting process.

A further technical solution of the present invention is: the dividing seam divides the expandable ring into four uniform parts.

A further technical proposal of the present invention is: the expandable ring is made of thin iron sheet, and a buffer layer is provided outside the expandable ring. The buffer layer is rubber skin.

The thin iron sheet can be deformed in the vertical direction and cannot be deformed in the horizontal direction, and has a certain hardness to ensure the locking effect, and the thin iron sheet material is easy to obtain.

A further technical solution of the present invention is: a force-receiving part is provided on the outside of the grouting pipe. The force-bearing part is used for clamping safety when using a wrench to twist the grouting pipe, and provides a force-bearing point.

A further technical solution of the present invention is that: the force-receiving part is a concave groove, which is used to receive force when the grouting pipe is rotated.

A further technical solution of the present invention is: a force-receiving part is provided above the upper connecting part, and two force-receiving parts are provided between the upper connecting part and the lower connecting part. In addition to playing the role of force, the force-bearing part also plays a certain position-limiting role to prevent the movement of the upper connecting piece and the lower connecting piece beyond the range of motion.

A further technical solution of the present invention is: the input end of the grouting pipe is connected to the grouting machine, and the grouting pipe is a steel pipe or an iron pipe.

The present invention also provides a locking grouting method in a hole, which is based on the device and includes the following steps:

Step 1: Drill holes at predetermined positions to form grouting holes;

Step 2: Install the locking structure in the contracted state into the grouting hole;

Step 3: Rotate the lower end of the grouting pipe through the upper connector and the lower connector in turn, and continue to rotate the grouting pipe to advance. The threaded connection between the grouting pipe and the upper connector is smaller than the grouting The pitch of the threaded connection between the pipe and the lower connector, when the grouting pipe is rotated downward, the deformation locking member expands and expands outwards, and fits closely with the wall of the grouting hole;

Step 4: Connect the top of the grouting pipe to the grouting equipment for grouting operation.

A further technical solution of the present invention is: in the first step, a drill with a diameter slightly larger than the locking structure is used to drill holes at the predetermined position, and the tunnel is cleaned to remove impurities in the tunnel.

A further technical solution of the present invention is: install the rubber sealing ring on the tapered section outside the expandable ring when the locking structure is not working, and push down the position below the upper connecting piece.

A further technical solution of the present invention is: install the locking structure in the non-working state into the grouting hole by hammering, and the installation is firm.

A further technical solution of the present invention is: the grouting pipe is rotated and propelled by a wrench at the stressed part. During the screw installation process, as the grouting pipe spirals forward, the expandable ring expands and expands outwards, and the hole wall Snug fit.

The locking structure shrinks into a straight line when it is not working, and expands outward when it is working.

Beneficial effects of the present invention: the present invention is reasonable in design and compact in structure, and the thread direction on the grouting pipe is consistent. When the grouting pipe is rotated, due to the The pitch is smaller than the pitch of the threaded connection between the grouting pipe and the lower connector, and the upper connector and the lower connector move in the same direction, but due to the difference in pitch, when the grouting pipe is turned, the movement distance of the lower connector is greater than The upper connecting piece, by changing the rotation direction of the grouting pipe, realizes the expansion or contraction of the deformed locking piece. When the deformed locking piece is under contraction, it is convenient to install into the grouting hole, and continue to rotate and inject after entering the grouting hole. The grout pipe makes the upper and lower connectors move upwards, so as to realize the expansion and expansion of the deformed locking part, which fits closely with the inner wall of the grouting hole to complete the locking, and the position of the grouting pipe is fixed, which solves the problem of high-pressure grouting and The internal pressure of excessive grouting is too large, causing the grouting pipe to slip and fall off, which affects the grouting effect, and the grouting effect is guaranteed.

Description of drawings

Fig. 1 is a schematic structural view of an in-hole locking grouting device provided by the present invention;

Fig. 2 is a sectional view when the locking structure provided by the present invention is connected to the sealing ring;

Fig. 3 is the structural representation of the grouting pipe provided by the present invention;

Fig. 4 is a structural schematic diagram of the locking structure provided by the present invention;

Fig. 5 is a schematic structural view of the sealing ring provided by the present invention.

Reference signs: 1. Grouting pipe, 2. Locking structure, 3. Forced part, 21. Upper connecting piece, 22. Lower connecting piece, 23. Deformation locking piece, 231. Tapered part, 232. Can Expansion ring, 233. cylindrical part, 234. split joint, 235. sealing ring.

detailed description

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not intended to limit the present invention Therefore, it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall into the within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.

Embodiment one:

Figures 1-5 show a locking grouting device in a hole, the device includes a grouting pipe 1 and a locking structure 2 sleeved outside the grouting pipe 1,

The locking structure 2 includes an upper connecting piece 21, a lower connecting piece 22 and a deformed locking piece 23, the upper connecting piece 21 is connected to the top of the deformed locking piece 23, and the lower connecting piece 22 is connected to the deformed locking piece 23. The bottom of the locking member 23 is connected, the grouting pipe 1 is a hollow pipe open up and down and the surface is provided with external threads, the upper connector 21 and the lower connector 22 are threaded with the grouting pipe 1 connection, the pitch of the threaded connection between the grouting pipe 1 and the upper connecting piece 21 is smaller than the pitch of the threaded connection between the grouting pipe 1 and the lower connecting piece 22, and when the grouting pipe 1 is rotated, The deformation locking member 23 expands or contracts.

As a preferred embodiment, both the upper connecting piece and the lower connecting piece are nuts, and the inner wall is provided with an internal thread matched with the grouting pipe. The upper connecting piece, the deformation locking piece and the lower connecting piece are formed by one welding process.

In this embodiment, the deformation locking member 23 includes a conical portion 231, an expandable ring 232, and a cylindrical portion 233 connected in sequence. The expandable ring 232 is provided with a vertical split slit 234, and the cone The shaped portion 231 is connected to the upper connecting piece 21 , and the cylindrical portion 233 is connected to the lower connecting piece 22 .

The tapered part is used for connecting the expandable ring and the upper connecting piece, and the cylindrical part is used for connecting the lower connecting piece and the expandable ring.

In this embodiment, a sealing ring 235 is sheathed on the outside of the connection between the tapered portion 231 and the upper connecting member 21 .

In this embodiment, the sealing ring is made of rubber, which not only increases the friction between the locking structure and the inner wall of the grouting hole during installation, but also plays a sealing role during the grouting process.

In this embodiment, the dividing slit 234 divides the expandable ring 232 into four uniform parts.

In this embodiment, the expandable ring 232 is made of thin iron sheet, and a buffer layer is provided on the outside of the expandable ring 232 . The buffer layer is rubber skin.

The thin iron sheet can be deformed in the vertical direction and cannot be deformed in the horizontal direction, and has a certain hardness to ensure the locking effect, and the thin iron sheet material is easy to obtain.

In this embodiment, a force receiving portion 3 is provided on the outside of the grouting pipe 1 . The force-bearing part is used for clamping safety when using a wrench to twist the grouting pipe, and provides a force-bearing point.

In this embodiment, the force-receiving part 3 is a concave groove for receiving force when the grouting pipe 1 is rotated.

In this embodiment, one force-receiving part 3 is provided above the upper connecting part 21 , and two force-receiving parts 3 are provided between the upper connecting part 21 and the lower connecting part 22 . In addition to playing the role of force, the force-bearing part also plays a certain position-limiting role to prevent the movement of the upper connecting piece and the lower connecting piece beyond the range of motion.

In this embodiment, the input end of the grouting pipe 1 is connected to the grouting machine, and the grouting pipe 1 is a steel pipe or an iron pipe.

The working principle of the device of the present invention: the screw threads on the grouting pipe are in the same direction. The pitch of the threaded connection between the grouting pipe 1 and the lower connecting piece 22, the upper connecting piece and the lower connecting piece move in the same direction, but due to the different pitches, when the grouting pipe is turned, the moving distance of the lower connecting piece is greater than that of the upper connecting piece , by changing the rotation direction of the grouting pipe, the expansion or contraction of the deformation locking part is realized. When the deformation locking part is under contraction, it is convenient to install and enter the grouting hole. After entering the grouting hole, continue to rotate the grouting pipe so that The upper connecting piece and the lower connecting piece move upward, so as to realize the expansion and outward expansion of the deformed locking piece, and closely fit with the inner wall of the grouting hole to complete the locking, and the position of the grouting pipe is fixed to ensure the grouting effect.

Embodiment two:

A locking grouting method in a hole, said method is based on the device described in Embodiment 1, comprising the following steps:

Step 1: Drill holes at predetermined positions to form grouting holes;

Step 2: Install the locking structure 2 in the contracted state into the grouting hole;

Step 3: Rotate the lower end of the grouting pipe 1 through the upper connector 21 and the lower connector 22 in turn, and continue to rotate the grouting pipe 1 to advance. The thread pitch is smaller than the pitch of the threaded connection between the grouting pipe 1 and the lower connector 22, and when the grouting pipe 1 is rotated downward, the deformation locking member 23 expands and expands outwards, and closely adheres to the wall of the grouting hole combine;

Step 4: Connect the top of the grouting pipe to the grouting equipment for grouting operation.

In this embodiment, in the first step, a drill with a diameter slightly larger than the locking structure is used to drill a hole at a predetermined position, and the tunnel is cleaned to remove impurities in the tunnel.

In this embodiment, when the locking structure is not working, install the rubber sealing ring on the tapered section outside the expandable ring, and push down the position below the upper connecting piece.

In this embodiment, the locking structure in the non-working state is installed in the grouting hole by hammering, and the installation is firm.

In this embodiment, the rotating grouting pipe uses a wrench to rotate and propel the force-receiving part. During the screw installation process, as the grouting pipe spirals forward, the expandable ring expands and expands outward, and is tightly connected to the hole wall. fit.

The locking structure shrinks into a straight line when it is not working, and expands outward when it is working.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. A locking grouting device in a hole, characterized in that: the device includes a grouting pipe (1) and a locking structure (2) sleeved outside the grouting pipe (1), The locking structure (2) includes an upper connecting piece (21), a lower connecting piece (22) and a deformation locking piece (23), and the upper connecting piece (21) and the top of the deformation locking piece (23) connection, the lower connecting piece (22) is connected to the bottom of the deformation locking piece (23), the grouting pipe (1) is a hollow pipe open up and down and the surface is provided with external threads, the upper connecting piece Part (21) and the lower connector (22) are all threaded with the grouting pipe (1), and the pitch of the threaded connection between the grouting pipe (1) and the upper connector (21) is less than The pitch of the threaded connection between the grouting pipe (1) and the lower connecting piece (22), and the deformation locking piece (23) expands or contracts when the grouting pipe (1) is rotated. 2. A hole-locking grouting device according to claim 1, characterized in that, the deformed locking member (23) comprises a conical portion (231), an expandable ring (232) and a cylinder connected in sequence part (233), the expandable ring (232) is provided with a vertical split slit (234), the tapered part (231) is connected with the upper connector (21), and the cylindrical part (233 ) is connected with the lower connector (22). 3. The in-hole locking grouting device according to claim 2, characterized in that a sealing ring (235) is sheathed on the outer side of the joint between the tapered portion (231) and the upper connector (21) . 4. The in-hole locking grouting device according to claim 2, characterized in that, the dividing seam (234) divides the expandable ring (232) into four uniform parts. 5. The in-hole locking grouting device according to claim 2, characterized in that, the expandable ring (232) is made of thin iron sheet, and a buffer layer is provided outside the expandable ring (232). 6. The in-hole locking grouting device according to any one of claims 1-5, characterized in that a force-receiving part (3) is provided on the outside of the grouting pipe (1). 7. The in-hole locking grouting device according to claim 6, characterized in that, the force receiving part (3) is a concave groove for receiving force when the grouting pipe (1) is rotated. 8. A locking grouting device in a hole according to claim 6, characterized in that a force-receiving part (3) is provided above the upper connecting piece (21), and the upper connecting piece (21) and Two force-receiving parts (3) are arranged between the lower connecting pieces (22). 9. A hole locking grouting device according to any one of claims 1-5, characterized in that the input end of the grouting pipe (1) is connected to the grouting machine, and the grouting The slurry pipe (1) is a steel pipe or an iron pipe. 10. A locking grouting method in a hole, characterized in that the method is based on the device according to any one of claims 1-9, comprising the following steps: Step 1: Drill holes at predetermined positions to form grouting holes; Step 2: Install the locking structure (2) in the contracted state into the grouting hole; Step 3: Rotate the lower end of the grouting pipe (1) through the upper connector (21) and the lower connector (22) in sequence, continue to rotate the grouting pipe (1) to advance, and rotate the grouting pipe (1) downward ), the deformation locking member (23) expands outward until the wall of the grouting hole closely fits; Step 4: Connect the top of the grouting pipe to the grouting equipment for grouting operation.

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