CN217580080U

CN217580080U - Drilling and grouting drilling tool for compaction grouting dry construction

Info

Publication number: CN217580080U
Application number: CN202221562897.3U
Authority: CN
Inventors: 张茜; 胡泽峰; 王鹏辉; 王岩; 王志国
Original assignee: China Shanxi Sijian Group Co Ltd
Current assignee: China Shanxi Sijian Group Co Ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-10-14
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to a slip casting reinforcement technique for the technical problem of the easy jam of drill bit hole that exists among the solution compaction slip casting dry construction technique, provides a drilling tool is used in compaction slip casting dry construction, including the drill pipe, with the drill bit of drill pipe connection, the drill pipe comprises a plurality of sections drilling rod unit connection, the drilling rod unit of lower extreme is for connecting the drill pipe, the drill bit with be connected the drill pipe connection, set up grout outlet, its characterized in that in the drill bit and the hookup location department of being connected the drill pipe: the peripheral wall of the connecting drill pipe is provided with a plurality of side grouting holes. The utility model discloses a connect the drill pipe lateral wall and set up the side slip casting hole, direct slip casting after the pore-forming has been accomplished need not to go into dedicated slip casting pipe again, can effectively prevent the slip casting work progress in, because the thick liquid condenses to block up slip casting drill bit grout outlet and leads to the slip casting to go on and the emergence of the shut-down condition. The drilling tool effectively enlarges the grouting range, accelerates the construction efficiency, saves the labor cost, and is particularly suitable for a compaction grouting dry construction device.

Description

Drilling and grouting drilling tool for compaction grouting dry construction

Technical Field

The utility model relates to a slip casting reinforcement technique specifically is a trompil slip casting drilling tool is used in dry-type construction of compaction slip casting.

Background

The grouting reinforcement technology is characterized in that a grouting material which meets engineering requirements and is prepared according to a certain proportion is injected into a soil layer through grouting equipment to fill gaps and soft parts of the soil layer so as to change the mechanical distribution and structural composition of the soil body, and after the grout is solidified, a complex is formed, so that the physical and mechanical properties of the complex are improved, and the purpose of reinforcing the foundation is achieved.

The common compaction grouting wet construction uses a non-porous steel pipe and a drill bit with holes and adopts high-pressure water to form holes, so that the soil is easy to disturb, especially the foundation soil with the problem of uneven settlement of the foundation caused by the change of underground water level is not beneficial to effectively achieving the purpose of reinforcement. If the compaction grouting dry construction is adopted for pore-forming operation, the hole is drilled firstly, then grouting is carried out, sequential operation is carried out, the disturbance to the soil body is small, but in the pore-forming process, because the drill bit is directly contacted with the soil body under the pressure action of a machine, the phenomenon that a grout outlet of the drill bit is blocked easily occurs, and the grouting effect is influenced. Or in the grouting process, the phenomenon that the grout outlet is blocked due to the coagulation of the grout caused by the unsmooth grout outlet occurs. The occurrence of these problems can lead to grouting not to go on smoothly to in the slip casting process, because the thick liquid can not flow out, slip casting steel pipe internal pressure is too big, leads to devices such as manometer, grouting pump to damage consequence such as.

In the prior art, CN202022216823.1 is a grouting pipe for foundation reinforcement, which comprises a connector; the connector comprises a connecting cylinder, one end of the connecting cylinder is connected with the pipe main body, the other end of the connecting cylinder is hinged with a plurality of clamping pieces, the clamping pieces are used for enclosing a complete tubular structure, a clamping edge extending towards the central line direction of the connecting cylinder is arranged at the end part, far away from the connecting cylinder, of each clamping piece, and an operating ring used for hooping the clamping pieces is movably sleeved on the connecting cylinder; the grouting head comprises a grouting barrel, a plurality of grouting holes are formed in the peripheral wall of the grouting barrel, and a fixing ring which is used for being lapped with the clamping edge to limit the grouting barrel to be separated from the clamping piece is fixedly connected to the end portion of the grouting barrel.

CN200420050740.8 an extrusion sealing type grouting device, which comprises a grouting pipe, wherein the top of the grouting pipe is connected with a slurry feeding device, and the lower half part of the grouting pipe is a grouting perforated pipe; a fixed tray is fixedly arranged on the outer peripheral wall of the grouting pipe and is positioned at the upper end of the grouting perforated pipe; the high-pressure sealing ring which is in a round drum shape and has the middle diameter larger than the diameters of the two end parts is sleeved on the grouting pipe and is positioned on the fixed tray; the extrusion device is sleeved on the grouting pipe and is positioned at the upper part of the sealing ring. The peripheral wall of the round drum-shaped high-pressure sealing ring expands outwards after being extruded and tightly presses the peripheral wall of the grouting hole, and the sealing effect of the sealing ring and the peripheral wall of the grouting hole is greatly improved under the action of the extrusion force compared with the prior art, and the phenomena of slurry overflow and slurry leakage are avoided.

CN201820090199.5 a soil pore-forming equipment, including tubular part, the stake point of arranging in tubular part bottom, stretch into and follow the slip casting pipe of tubular part axial through tubular part from tubular part top, the inner chamber of stake point is equipped with the connecting pipe with the slip casting pipe intercommunication, be equipped with the side slip casting hole that can pour into the filler into soil hole on the perisporium of stake point, this side slip casting hole is linked together with the connecting pipe, the diameter of stake point is greater than the diameter of tubular part.

CN201922021557.4 hollow column hammer for carrier pile, carrier pile construction technical field has been related to, need shift out the slip casting pipe after having solved the slip casting and tamp again, lead to the numerous and diverse problem of construction flow, including shaft and column cap, the one end of shaft just is fixed with the fixed ring piece in the internal perisporium, the inside of the one end of shaft rotates and is provided with the regulation ring pipe, form the slip casting ring chamber between regulation ring pipe and the shaft, a plurality of slip casting perforation have been seted up to the regulation ring pipe, a plurality of slip casting holes have been seted up to the week side of the one end of shaft, it still elastically is provided with a plurality of shutoff steel balls to adjust the week side of ring pipe.

The above prior arts all indicate that grouting holes may be provided around the pipe wall of the grouting pipe for outflow of grouting liquid to reinforce the foundation. However, the technical scheme is that the grouting pipe is placed into the formed grouting hole for grouting construction. For a drilling tool for integrated drilling forming and grouting construction, no specific scheme is provided for how to scientifically open a hole on a grouting drill bit so as to adapt to dry drilling construction.

Disclosure of Invention

The utility model discloses a solve the technical problem that the drill bit hole that exists easily blockked up among the compaction slip casting dry-type construction technology, provide a trompil slip casting drilling tool is used in compaction slip casting dry-type construction.

Realize the technical scheme of the utility model is, a pressure close slip casting is trompil slip casting drilling tool for dry-type construction, including the drill pipe, with the drill bit of drill pipe connection, the drill pipe comprises a plurality of sections drilling rod unit connections, the drilling rod unit of lower extreme is for connecting the drill pipe, the drill bit with be connected the drill pipe and be connected, set up out thick liquid mouth, its characterized in that in the drill bit and the hookup location department of being connected the drill pipe: the peripheral wall of the connecting drill pipe is provided with a plurality of side grouting holes.

Before construction, the surface ground is required to be cleaned up, grouting point positions are measured and positioned according to construction drawings and construction scheme requirements, measurement and pay-off results are rechecked, hole drilling construction is carried out by using special hole forming equipment, a grouting drill bit and a grouting steel pipe after errors do not exist, sealing is carried out after hole forming is finished, grout is proportionally configured and grouted, single-pipe retreating type grouting is adopted, grouting is carried out while pulling out is carried out, namely the designed grouting amount or pressure final pressure is 2.0MPa, when the stabilization time is more than 5min, grouting is carried out continuously by lifting 0.5m upwards, and real-time monitoring is carried out in the process.

Compared with the prior art, the technical characteristics of the utility model lie in: the side wall of the connecting drill pipe is provided with the side grouting hole, grouting is directly performed after hole forming is finished, a special grouting pipe is not required to be put in, and shutdown caused by grouting failure due to the fact that slurry is coagulated to block a grouting drill bit grout outlet in the grouting construction process can be effectively prevented; the perforated connecting drill pipe can be repeatedly used, so that materials are saved, the connecting drill pipe can be used after being simply installed on site, and the construction quality can be ensured; the drilling tool effectively enlarges the grouting range, accelerates the construction efficiency and saves the labor cost; it is especially suitable for the dry construction equipment of compact grouting.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a drill bit configuration;

FIG. 3 is a schematic diagram of the opening position of the side grouting hole.

Detailed Description

As shown in fig. 1, the open-hole grouting drilling tool for the compaction grouting dry construction comprises a drill pipe 1 and a drill bit 3 connected with the drill pipe, wherein the drill pipe 1 is formed by connecting a plurality of sections of drill rod units, the drill rod unit at the lowest end is a connecting drill pipe 2, the drill bit 3 is connected with the connecting drill pipe 2, and a grout outlet 5 is arranged at the connecting position of the drill bit 3 and the connecting drill pipe 2, and the open-hole grouting drilling tool is characterized in that: the peripheral wall of the connecting drill pipe 2 is provided with a plurality of side grouting holes 4. The grouting liquid in the drill pipe 1 is extruded out through the grout outlet 5.

The connecting drill pipe 2 is a steel pipe with the length of 1.6m, the diameter of 42mm and the wall thickness of 3mm,

the side slip casting hole 4 distribute in the region of connecting drilling pipe 2 lowermost end 100mm-1600mm, side slip casting hole 4 interval 150mm set up, side slip casting hole 4 diameter 8mm, side slip casting hole 4 along connecting 2 axle centers of drilling rod with 72 angle distribution.

The position and the quantity of the side grouting holes are arranged, so that under the condition of ensuring the strength of the connecting drill pipe, the side grouting holes cannot be completely blocked by clay or rock particles in the foundation in the dry drilling process without grouting of the foundation, and a large amount of particles cannot enter the grouting drill pipe. Even if the grout outlet at the lowest drill bit is seriously blocked, grouting liquid can still enter the foundation through the side grouting hole under certain pressure, and the foundation reinforcement work is completed.

The field construction process flow comprises the following steps: measuring and positioning → drilling → completing pore-forming → sealing → arranging slurry → grouting → standard of constant pressure → lifting pipe 0.5m → grouting → standard of constant pressure → finishing grouting.

Claims

1. The utility model provides a drilling tool is grouted with trompil to compaction slip casting dry-type construction, includes drill pipe (1), drill bit (3) be connected with drill pipe (1), drill pipe (1) comprises a plurality of sections drilling rod unit connections, drilling rod unit of lower extreme is for connecting drill pipe (2), drill bit (3) be connected with connecting drill pipe (2), set up out thick liquid mouth (5), its characterized in that in drill bit (3) and the hookup location department of connecting drill pipe (2): the peripheral wall of the connecting drill pipe (2) is provided with a plurality of side grouting holes (4).

2. The open-hole grouting drill for the compaction grouting dry construction according to claim 1, characterized in that: the connecting drill pipe (2) is a steel pipe with the length of 1.6m, the diameter of 42mm and the wall thickness of 3 mm.

3. The open-hole grouting drill for the compaction grouting dry construction according to claim 1, characterized in that: the side grouting holes (4) are distributed in the area of 100mm-1600mm at the lowest end of the connecting drill pipe (2).

4. The open-hole grouting drill for the compaction grouting dry construction according to claim 1, characterized in that: the side grouting holes (4) are arranged at intervals of 150 mm.

5. The open-hole grouting drill for the compaction grouting dry construction according to claim 1, characterized in that: the diameter of the side grouting hole (4) is 8mm.

6. The open-hole grouting drill for the compaction grouting dry construction according to claim 1, wherein: the side grouting holes (4) are distributed along the axis of the connecting drill rod at an angle of 72 degrees.