Quadruple pipe drill rod

Abstract

The utility model discloses a quadruple pipe drill pipe which comprises four concentric pipelines which are sequentially nested, the four pipelines are an equipment line pipe, a high-pressure water injection pipe, a gas injection pipe and a high-pressure grouting pipe, the equipment line pipe is located on the innermost layer, and the high-pressure grouting pipe is located on the outermost layer; the heights of the end parts of the equipment line pipe, the high-pressure water injection pipe, the gas injection pipe and the high-pressure grouting pipe at the upper end of the quadruple pipe drill rod are different, the equipment line pipe is the highest, and the high-pressure water injection pipe, the gas injection pipe and the high-pressure grouting pipe are sequentially arranged in a step shape; a stiffening plate is arranged between every two adjacent pipes to reinforce the strength; and a detection device extends into the device line pipe for detection. And the internal condition of the cement pile can be detected, problems can be found in time and treated in advance, and the construction quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of foundation engineering in building construction, and specifically to a quadruple drill pipe rod. Background Technology

[0002] The triple-tube grouting method refers to simultaneously injecting three media—high-pressure water, compressed air, and cement grout—into the soil through a high-pressure water nozzle, a compressed air nozzle, and a grouting nozzle. The combined action of the high-pressure water jet and compressed air enhances the energy of the jet, enabling it to cut and break up the soil. Simultaneously, under the action of the jet, soil particles are thoroughly mixed with the cement grout to form a solidified body, thereby achieving the purposes of reinforcing the foundation and preventing seepage. The main equipment used is the triple tube, which typically consists of three concentric circular tubes. The three liquids—high-pressure water, compressed air, and cement grout—are pumped into each of the three tubes and finally ejected from the nozzle, creating a cement-mixing pile underground, thus enhancing the soil's load-bearing capacity.

[0003] However, during jet grouting, the quality of the grouted cement mixing piles cannot be clearly determined by the triple-tube drill rod used for underground grouting. Construction workers have no idea about the underground cement slurry pouring process and can only rely on experience and specifications for construction. Strength testing of the cement mixing piles can only be conducted after several days of cement slurry solidification to determine the grouting effect. This reliance on manual experience makes it difficult to guarantee project quality, resulting in a low probability that the cement piles will reach their design strength, and problems arising in the mixing piles cannot be detected in a timely manner.

[0004] Therefore, understanding the quality of the cement mixing pile formed during grouting is a problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this application is to solve the problems in the prior art where the quality of the cement-soil mixing pile formed by grouting cannot be clearly known and the quality of the cement mixing pile is difficult to control during the high-pressure grouting process. Therefore, this utility model provides a quadruple pipe drill rod, which adds an equipment line pipe inside the original triple pipe. The equipment line pipe can be used by the detection equipment to observe the internal condition of the cement mixing pile.

[0006] To achieve the above objectives, this utility model provides a quadruple pipe drill rod, comprising four concentric and sequentially nested pipes, the four pipes being an equipment line pipe, a high-pressure water injection pipe, an air injection pipe, and a high-pressure grouting pipe, with the equipment line pipe located in the innermost layer and the high-pressure grouting pipe located in the outermost layer;

[0007] The ends of the equipment conduit, high-pressure water injection pipe, air injection pipe and high-pressure grouting pipe at the upper end of the quadruple drill pipe are at different heights, with the equipment conduit being the highest. The high-pressure water injection pipe, air injection pipe and high-pressure grouting pipe are arranged in a stepped manner.

[0008] The spare line pipe, high-pressure water injection pipe, air injection pipe and high-pressure grouting pipe in the quadruple tube drill rod are of the same length, and the lower end of the quadruple tube drill rod has a corresponding stepped arrangement;

[0009] A stiffening plate is installed between two adjacent pipes on one of the four-tube drill rods to strengthen the pipes.

[0010] The equipment conduit allows the detection equipment to extend into and perform detection.

[0011] By adopting the above technical solution, equipment conduits are installed inside the triple-pipe system, allowing testing equipment to penetrate underground and inspect the concrete pile's pouring condition. This identifies potential issues affecting the pile's strength, such as voids or gaps. This solves the problem in practical engineering where underground conditions are difficult to confirm during high-pressure grouting, and grouting operations rely heavily on specifications and experience. This allows construction personnel to observe the actual condition of the underground concrete pile, facilitating remedial and adjustment efforts. Compared to existing technologies that only allow testing after concrete solidification, this application provides continuous data feedback during the pouring process, improving construction quality. It enables the inspection of the concrete pile's internal condition, allowing for timely detection and proactive problem-solving, thus enhancing construction quality. Furthermore, the stepped distribution of the four pipes in this application facilitates easier connection, and the splicing of multiple pipe sections enhances stability.

[0012] In some embodiments, the upper ends of the equipment conduit, high-pressure water injection pipe, air injection pipe and high-pressure grouting pipe are all provided with upper external threads and lower external threads, and the upper external threads of the quadruple pipe drill rod are connected to the lower external threads of another quadruple pipe drill rod by threading to extend the quadruple pipe drill rod.

[0013] Using the above technical solution, the entire drill pipe can be lengthened by connecting the head and tail of multiple quadruple drill pipes.

[0014] In some embodiments, the stiffening plate between the pipes is integrally formed with the four pipes.

[0015] The overall strength is higher when the above technical solution is adopted.

[0016] In some embodiments, the length of the quadruple drill pipe is 2-3 mm; the outer diameter of the equipment conduit is 15-20 mm and the wall thickness is 3-5 mm; the outer diameter of the high-pressure water injection pipe is 35-45 mm and the wall thickness is 3-5 mm; the outer diameter of the air injection pipe is 55-60 mm and the wall thickness is 3-5 mm; and the outer diameter of the high-pressure grouting pipe is 85-90 mm and the wall thickness is 3-5 mm.

[0017] By adopting the above technical solution, the strength of the pipeline can be guaranteed and the applicability of the four-way pipe drill rod can be enhanced.

[0018] In some embodiments, the detection device is an ultrasonic radar probe. The detection device may also be a miniature camera or other device capable of penetrating cement slurry to detect data.

[0019] In some embodiments, the stiffening plates between the pipes are arranged symmetrically along the center of the pipes to form a cross shape;

[0020] The positions of the multiple cross-shaped stiffening plates between the pipes are correspondingly arranged to form a large cross shape.

[0021] By adopting the above technical solution, the overall strength of the pipeline can be increased, preventing damage and deformation.

[0022] In some embodiments, a pipe fitting gasket is provided at the end of the pipe.

[0023] The above technical solution enhances the sealing effect when the upper and lower pipe connections are extended.

[0024] In summary, this application creates a novel four-way drill rod by installing a separate equipment line pipe inside the three-way pipe. This allows the detection equipment to extend into the cement slurry from the equipment line pipe to inspect the formation of the cement pile, such as whether there are gaps or voids in the cement pile. By inspecting the internal condition of the cement pile, problems can be addressed in advance, thus improving construction quality. Attached Figure Description

[0025] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.

[0026] Figure 1 This is a schematic diagram of the quadruple drill pipe in an embodiment of this utility model;

[0027] Figure 2 This is a detailed view of the upper part of the quadruple drill pipe in an embodiment of this utility model;

[0028] Figure 3 This is a detailed view of the lower part of the quadruple drill pipe in an embodiment of this utility model;

[0029] Figure 4 This is a top view of the quadruple drill pipe in an embodiment of this utility model;

[0030] Figure 5This is a top view of the quadruple drill pipe in an embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Equipment conduit; 2. Upper external thread of equipment conduit; 3. High-pressure water injection pipe; 4. Upper external thread of high-pressure water injection pipe; 5. Air injection pipe; 6. Upper external thread of air pipe; 7. High-pressure grouting pipe; 8. Upper external thread of high-pressure grouting pipe; 9. Lower internal thread of equipment conduit; 10. Lower internal thread of high-pressure water injection pipe; 11. Lower external thread of air pipe; 12. Lower internal thread of high-pressure grouting pipe; 13. Pipe gasket; 14. Reinforcing plate. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0036] Example

[0037] See Figure 1-3This embodiment provides a quadruple tube drill rod, comprising four concentric and nested pipes: an equipment line pipe 1, a high-pressure water injection pipe 3, an air injection pipe 5, and a high-pressure grouting pipe 7. The equipment line pipe 1 is located in the innermost layer, and the high-pressure grouting pipe 7 is located in the outermost layer. The upper ends of the equipment line pipe 1, the high-pressure water injection pipe 3, the air injection pipe 5, and the high-pressure grouting pipe 7 are all provided with upper external threads, and the lower ends are provided with lower external threads. The upper external threads of the quadruple tube drill rod are connected to the lower external threads of another quadruple tube drill rod by threads, thereby extending the quadruple tube drill rod.

[0038] Specifically, the upper end of the equipment conduit 1 has an external thread, and the lower end has an internal thread 9, with the highest point being the equipment conduit 1; the upper part of the high-pressure water injection pipe 3 has an external thread 4, and the lower part has an internal thread 10, which is sleeved on the outside of the equipment conduit 1, with the upper end lower than the equipment conduit 1 and the lower end higher than the equipment conduit 1; the upper part of the air injection pipe 5 has an external thread 6, and the lower part has an external thread 11, which is sleeved on the outside of the high-pressure water injection pipe 3, with the upper end lower than the high-pressure water injection pipe 3 and the lower end higher than the high-pressure water injection pipe 3; the upper part of the high-pressure grouting pipe 7 has an external thread 8, and the lower part has an internal thread 12, which is sleeved on the outside of the air injection pipe 5, with the upper end lower than the air injection pipe 5 and the lower end higher than the air injection pipe 5.

[0039] By connecting the upper and lower threads, the quadruple drill pipe can be lengthened, making it suitable for deeper cement mixing piles.

[0040] See Figure 4 Each pipe is reinforced by a stiffening plate 14, which is fixed between two adjacent pipes. Specifically, the stiffening plates 14 are symmetrically arranged along the center of the pipe to form a cross shape. Multiple cross-shaped stiffening plates 14 are positioned correspondingly to form a large cross shape. The stiffening plates 14 are arranged in multiple sections along the pipe. The stiffening plates 14 are integrally formed with the pipe.

[0041] The equipment conduit 1 allows the detection equipment to extend into and perform detection. Preferably, the detection equipment is an ultrasonic probe, but it can also be a miniature device such as a miniature camera capable of detecting the required underground data.

[0042] In existing technologies, it is impossible to fully understand the underground conditions during high-pressure jet grouting. Grouting can only be carried out based on prior surveys or experience. This leads to problems during the grouting process not being detected in time. The piles can only be inspected after the concrete piles have hardened, which makes it impossible to deal with problems in a timely manner and affects the construction quality.

[0043] This application provides a quadruple-tube drill pipe. During or after grouting, construction workers can insert a miniature detection device into the ground via the equipment conduit 1. The bottom of the drill pipe features a uniquely designed drill bit, allowing the detection device to probe the surrounding cement slurry environment. The connection between the upper part of the drill pipe and the device driving the drill rod rotation and the device for pumping mud and water is similar to that of a triple-tube drill pipe, connected via flanges, with materials pumped into different pipes. However, this application's embodiment includes an additional equipment conduit 1. The upper part of the equipment conduit 1 has an opening, and the lower part is sealed (allowing the detection signal from the detection device to be transmitted), enabling construction workers to insert the detection device and preventing mud from escaping from the top of the equipment conduit 1 during drill rod operation. Specifically, a drill bit is installed at the bottom of the equipment conduit 1, which seals the bottom of the conduit.

[0044] To enhance the strength of the extended quadruple tube, in some embodiments, the ends of the equipment line pipe 1, high-pressure water injection pipe 3, air injection pipe 5, and high-pressure grouting pipe 7 at the upper end of the quadruple tube drill rod are at different heights, with the equipment line pipe 1 being the highest, and the high-pressure water injection pipe 3, air injection pipe 5, and high-pressure grouting pipe 7 arranged in a stepped manner. The equipment line pipe 1, high-pressure water injection pipe 3, air injection pipe 5, and high-pressure grouting pipe 7 in the quadruple tube drill rod are of the same length, and the lower end of the quadruple tube drill rod has a corresponding stepped arrangement.

[0045] Specifically, the length of the quadruple drill pipe is 2-3mm; the outer diameter of equipment conduit 1 is 15-20mm and the wall thickness is 3-5mm; the outer diameter of high-pressure water injection pipe 3 is 35-45mm and the wall thickness is 3-5mm; the outer diameter of air injection pipe 5 is 55-60mm and the wall thickness is 3-5mm; and the outer diameter of high-pressure grouting pipe 7 is 85-90mm and the wall thickness is 3-5mm.

[0046] See Figure 5 The pipe ends are equipped with pipe fitting gaskets 13, which allow construction workers to connect two quadruple drill rods end to end to extend the quadruple drill rod. The ends of the pipes are connected and fixed by threads, and the pipe fitting gaskets 13 at the ends of the pipes improve the sealing effect during connection.

[0047] Preferably, the equipment conduit 1, high-pressure water injection pipe 3, air injection pipe 5, and high-pressure grouting pipe 7 are all made of alloy steel or high-carbon steel, and the pipes are integrally formed and connected by alloy steel or high-carbon steel stiffening plates.

[0048] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0049] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the substantive content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A quadruple-tube drill pipe, characterized in that, It includes four concentric and nested pipes, namely, equipment line pipe (1), high-pressure water injection pipe (3), air injection pipe (5) and high-pressure grouting pipe (7), with the equipment line pipe (1) located in the innermost layer and the high-pressure grouting pipe (7) located in the outermost layer; The heights of the ends of the equipment line pipe (1), high-pressure water injection pipe (3), air injection pipe (5) and high-pressure grouting pipe (7) at the upper end of the quadruple tube drill rod are different, with the equipment line pipe (1) being the highest, and the high-pressure water injection pipe (3), air injection pipe (5) and high-pressure grouting pipe (7) arranged in a stepped manner. The spare line pipe, high-pressure water injection pipe (3), air injection pipe (5) and high-pressure grouting pipe (7) in the quadruple tube drill rod have the same length, and the lower end of the quadruple tube drill rod has a corresponding stepped arrangement; A stiffening plate (14) is provided between two adjacent pipes on a quadruple drill pipe to strengthen the pipe strength; The equipment conduit (1) is for the detection equipment to extend into and detect.

2. A quadruple drill pipe according to claim 1, characterized in that, The upper ends of the equipment conduit (1), high-pressure water injection pipe (3), air injection pipe (5) and high-pressure grouting pipe (7) are all provided with upper external threads and lower external threads. The upper external threads of the quadruple tube drill rod are connected to the lower external threads of another quadruple tube drill rod by threading to extend the quadruple tube drill rod.

3. A quadruple drill pipe according to claim 2, characterized in that, The pipe end is provided with a pipe fitting gasket (13).

4. A quadruple drill pipe according to claim 1, characterized in that, The stiffening plate (14) between the pipes is integrally formed with the pipes.

5. A quadruple-tube drill pipe according to claim 1, characterized in that, The length of the quadruple drill pipe is 2-3mm; the outer diameter of the equipment conduit (1) is 15-20mm and the wall thickness is 3-5mm; the outer diameter of the high-pressure water injection pipe (3) is 35-45mm and the wall thickness is 3-5mm; the outer diameter of the air injection pipe (5) is 55-60mm and the wall thickness is 3-5mm; the outer diameter of the high-pressure grouting pipe (7) is 85-90mm and the wall thickness is 3-5mm.

6. A quadruple drill pipe according to claim 1, characterized in that, The detection device is an ultrasonic radar probe.

7. A quadruple drill pipe according to claim 1, characterized in that, The stiffening plates (14) between the pipes are arranged symmetrically along the center of the pipes to form a cross shape; The positions of the multiple cross-shaped stiffening plates (14) between the pipes are correspondingly arranged to form a large cross shape.

8. A quadruple drill pipe according to claim 1, characterized in that, The pipe end is provided with a pipe fitting gasket (13).

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