Anti-caving pile device for building drilling rig construction

Abstract

The utility model discloses a kind of building drilling rig construction hole collapse protection casing devices, it is related to drilling rig protection field, including drilling rig drill rod, inner protective cylinder is sleeved on the outer wall of drilling rig drill rod, outer protective cylinder is sleeved on the outer portion of inner protective cylinder, polystyrene foam is filled between inner protective cylinder and outer protective cylinder, high-pressure injection module and slurry extraction module are installed between inner protective cylinder and outer protective cylinder, the casing device innovatively uses double-layer composite protection structure, outer protective cylinder is used as main force component, and inner protective cylinder is formed into flexible isolation layer by elastomer wrapping, vibration impact in the process of drilling is effectively buffered, when drill rod drills to soft stratum such as slurry layer, slurry extraction module extracts slurry in hole by negative pressure suction nozzle quickly, reduces hole wall water pressure, reduces quicksand, piping risk, while high-pressure injection module sprays speed-setting polyurethane resin, resin mixes and solidifies with slurry quickly, reduces collapse risk, to ensure that drilling surface structure is stable.

Description

Technical Field

[0001] This utility model relates to the field of drilling rig protection, specifically a casing device for preventing hole collapse during construction drilling rigs. Background Technology

[0002] In building foundation construction, bored piles are widely used in high-rise buildings, bridges, subways and other projects due to their high bearing capacity and strong adaptability. However, under complex geological conditions (such as soft soil layers, gravel layers, water-rich strata or karst development areas), the drilling process can easily cause instability of the borehole wall, leading to borehole collapse accidents.

[0003] Traditional steel casings employ a single-layer rigid structure design, with their support mechanism relying solely on the friction between the casing wall and the soil to fix the borehole wall. However, in soft soil, quicksand, or water-rich strata, this structure has room for improvement. During drilling, the mud and sand generated settle naturally by gravity, and sediment tends to accumulate at the bottom of the borehole, requiring frequent drilling stops for cleaning, which greatly reduces drilling efficiency. Furthermore, in the event of a sudden collapse of the strata, the rigid casing cannot dynamically fill the gaps, which can easily lead to the escalation of the accident. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a construction drilling rig anti-collapse hole casing device, including a drilling rig drill rod, an inner protective casing sleeved on the outer wall of the drilling rig drill rod, an outer protective casing sleeved on the outside of the inner protective casing, polystyrene foam filling the space between the inner protective casing and the outer protective casing, and a high-pressure jetting module and a mud extraction module installed between the inner protective casing and the outer protective casing.

[0005] Preferably, the outer protective cylinder includes a single set of cylinders, the single set of cylinders is provided with several sets, and several sets of connecting rods are fixedly connected between adjacent sets of single sets of cylinders, and a spiral guide groove is opened on the outer wall of each set of single sets of cylinders.

[0006] Preferably, the high-pressure injection module includes a high-pressure pipeline, and a first opening is provided on the outside of the high-pressure pipeline. The first opening is provided in several groups, and each group of the first opening is fixedly connected to a group of pipelines. Each group of the group of pipelines is located between two adjacent groups of single cylinders.

[0007] Preferably, the mud extraction module includes a mud pump, and the mud pump input pipe is fixedly connected to a manifold pipe through a flange. A second opening is provided on one side of the manifold pipe. Several groups of second openings are provided. A suction pipe is fixedly connected in each group of second openings. Each group of suction pipes is located between two adjacent groups of single cylinders. Several groups of through holes are provided on the surface of each group of suction pipes.

[0008] Preferably, several sets of the single-unit cylinders are evenly arranged on the outside of the drill rod of the drilling rig, and the inner protective cylinder is rotatably connected to the drill rod of the drilling rig.

[0009] Preferably, an external grouting pump is fixedly connected to the top of the high-pressure pipeline via a flange.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model proposes a construction drilling rig anti-collapse hole casing device. This casing device innovatively adopts an inner and outer double-layer composite protective structure. The outer protective casing serves as the main load-bearing component, resisting external soil pressure, while the inner protective casing forms a flexible isolation layer through an elastic body, effectively buffering the vibration and impact during drilling. When the drill rod drills into soft strata such as mud layers, the mud extraction module quickly extracts the mud from the hole through a negative pressure suction nozzle, reducing the water pressure on the hole wall and reducing the risk of quicksand and piping. At the same time, the high-pressure jetting module sprays fast-setting polyurethane resin, which quickly mixes with the mud and solidifies to form a rigid support ring, reducing the risk of collapse and ensuring the stability of the drilling face structure. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0015] Figure 3 For the present utility model Figure 2 A structural diagram from another perspective.

[0016] As shown in the figure: 1. Drill rod of drilling rig; 2. Inner protective cylinder; 3. Outer protective cylinder; 31. Single set of cylinder body; 32. Spiral guide channel; 33. Connecting rod; 4. High pressure injection module; 41. High pressure pipeline; 42. Grouped pipeline; 5. Mud extraction module; 51. Mud pump; 52. Combination pipe; 53. Suction pipe; 54. Through hole. Detailed Implementation

[0017] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0018] Please see Figures 1 to 3 This utility model provides a technical solution: a construction drilling rig anti-collapse hole casing device, including a drilling rod 1, an inner protective casing 2 sleeved on the outer wall of the drilling rod 1, an outer protective casing 3 sleeved on the outside of the inner protective casing 2, polystyrene foam filling the space between the inner protective casing 2 and the outer protective casing 3, and a high-pressure jetting module 4 and a mud extraction module 5 installed between the inner protective casing 2 and the outer protective casing 3.

[0019] This casing device innovatively adopts an inner and outer double-layer composite protective structure. The outer protective casing 3 serves as the main load-bearing component to resist external soil pressure, while the inner protective casing 2 forms a flexible isolation layer by wrapping with an elastomer, effectively buffering the vibration and impact during drilling. When the drill rod drills into soft formations such as mud layers, the mud extraction module 5 quickly extracts the mud from the hole through a negative pressure suction nozzle, reducing the water pressure on the hole wall and reducing the risk of quicksand and piping. At the same time, the high-pressure jetting module 4 sprays fast-setting polyurethane resin, which quickly mixes with the mud and solidifies to form a rigid support ring, reducing the risk of collapse and ensuring the stability of the drilling face structure.

[0020] The outer protective cylinder 3 includes a single set of cylinders 31. The single set of cylinders 31 is provided with several sets, and several sets of connecting rods 33 are fixedly connected between adjacent sets of single sets of cylinders 31. Each set of single sets of cylinders 31 has a spiral guide groove 32 on its outer wall.

[0021] As the drill rod 1 of the drilling rig continues to descend and drill, the outer protective cylinder 3 follows synchronously. The spiral guide groove 32 set on its outer wall surrounds the cylinder at a 30° angle. Through the rotational torque, the mud and sand are driven to spirally rise along the groove to form a continuous slag discharge channel, thus avoiding the accumulation of sediment at the bottom of the hole.

[0022] The high-pressure injection module 4 includes a high-pressure pipeline 41. A first opening is provided on the outside of the high-pressure pipeline 41. The first opening is provided with several groups. Each group of first openings is fixedly connected to a group of pipelines 42. Each group of pipelines 42 is located between two adjacent groups of single cylinders 31.

[0023] An external grouting pump is fixedly connected to the top of the high-pressure pipeline 41 via a flange;

[0024] The mud extraction module 5 includes a mud pump 51. The input pipe of the mud pump 51 is fixedly connected to a manifold pipe 52 through a flange. A second opening is provided on one side of the manifold pipe 52. The second opening is provided in several groups. Each group of second openings is fixedly connected to a suction pipe 53. Each group of suction pipes 53 is located between two adjacent groups of single cylinders 31. Each group of suction pipes 53 has several through holes 54 on its surface.

[0025] Several sets of single-unit cylinders 31 are evenly arranged on the outside of the drill rod 1 of the drilling rig, and the inner protective cylinder 2 is rotatably connected to the drill rod 1 of the drilling rig.

[0026] During drilling operations, when the drill rod 1 and the outer protective casing 3 penetrate the mud layer or loose strata, the mud pump 51 starts simultaneously, quickly extracting the mud from the hole through the suction pipe 53, and pumping it outward after entering the manifold 52. At the same time, the grouting pump injects the fast-setting polyurethane resin into the high-pressure pipeline 41, which is then diverted to the weak areas of the drilling face through the group pipeline 42. The resin quickly solidifies to form a rigid support layer, seamlessly filling the gaps after the mud is extracted. The dual pumps work together to achieve "drainage before consolidation", thereby reducing the risk of collapse and ensuring the structural integrity of the drilling face.

[0027] The inner protective cylinder 2 is made of highly elastic rubber lining, which absorbs the high-frequency vibration generated by the rotation of the drill rod 1 through flexible deformation. The polystyrene foam layer between the inner protective cylinder 2 and the outer protective cylinder 3 uses a closed-cell structure to block the transmission of low-frequency noise, thereby achieving the effect of vibration reduction and noise reduction.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0029] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0030] The contents not described in detail in this specification do not improve upon this application and are all prior art known to those skilled in the art, and therefore are not described in detail.

Claims

1. A casing device for preventing hole collapse during construction drilling, characterized in that: The system includes a drill rod (1), an inner protective cylinder (2) is fitted on the outer wall of the drill rod (1), an outer protective cylinder (3) is fitted on the outside of the inner protective cylinder (2), polystyrene foam is filled between the inner protective cylinder (2) and the outer protective cylinder (3), and a high-pressure jetting module (4) and a mud extraction module (5) are installed between the inner protective cylinder (2) and the outer protective cylinder (3).

2. The anti-collapse casing device for construction drilling rigs according to claim 1, characterized in that: The outer protective cylinder (3) includes a single set of cylinders (31). The single set of cylinders (31) is provided with several sets, and several sets of connecting rods (33) are fixedly connected between two adjacent sets of single sets of cylinders (31). Each set of single sets of cylinders (31) has a spiral guide groove (32) on its outer wall.

3. The anti-collapse hole casing device for construction drilling rigs according to claim 2, characterized in that: The high-pressure injection module (4) includes a high-pressure pipeline (41). A first opening is provided on the outside of the high-pressure pipeline (41). The first opening is provided with several groups. Each group of first openings is fixedly connected with a group pipeline (42). Each group of group pipelines (42) is located between two adjacent groups of single cylinders (31).

4. The anti-collapse hole casing device for building drilling rigs according to claim 3, characterized in that: The mud extraction module (5) includes a mud pump (51). The input pipe of the mud pump (51) is fixedly connected to a manifold (52) through a flange. A second opening is provided on one side of the manifold (52). Several groups of the second opening are provided. Each group of the second opening is fixedly connected to a suction pipe (53). Each group of suction pipes (53) is located between two adjacent groups of single cylinders (31). Several groups of through holes (54) are provided on the surface of each group of suction pipes (53).

5. The anti-collapse casing device for construction drilling rigs according to claim 4, characterized in that: Several sets of single-unit cylinders (31) are evenly arranged on the outside of the drill rod (1) of the drilling rig, and the inner protective cylinder (2) is rotatably connected to the drill rod (1) of the drilling rig.

6. The anti-collapse casing device for construction drilling rigs according to claim 5, characterized in that: The high-pressure pipeline (41) is fixedly connected to an external grouting pump at its top end via a flange.

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