Dense sand gravel layer hole guiding device

Abstract

The utility model belongs to the technical field of foundation treatment construction, and particularly relates to a dense sand gravel layer hole guiding device which comprises a drill bit and a drill rod, the drill bit is arranged at the lower end of the drill rod, and the upper end of the drill rod is detachably connected with a drilling machine. A rotary excavating component is arranged on the side wall of the drill rod, and the drill bit and the rotary excavating component are driven by the drilling machine to rotate to complete hole guiding work. The rotary excavating component comprises an upper-layer rotary excavating plate far away from the drill bit and a lower-layer rotary excavating plate close to the drill bit; the two same upper-layer rotary excavating plates are symmetrically arranged on the side wall of the drill rod in the radial direction, and the two same lower-layer rotary excavating plates are symmetrically arranged on the side wall of the drill rod in the radial direction; the plane where the upper-layer rotary excavating plate is located is perpendicular to the plane where the lower-layer rotary excavating plate is located. The hole guiding device is economical and efficient; in foreign construction, under the condition that the compact sand layer cannot be continuously drilled, novel equipment does not need to be purchased again, the compact sand layer can be rapidly penetrated for construction, the time cost and the purchasing cost are saved, meanwhile, operation and construction are facilitated, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation treatment construction, and particularly relates to a hole-guiding device for a dense sand and gravel layer. Background Art

[0002] During construction abroad, for the vibratory stone pile construction in deep and dense sand layers, the ordinary 180KW vibratory equipment used on site was unable to penetrate the sand layer, and the equipment current was extremely high, which could easily cause damage to the equipment motor. After many attempts, it ended in failure, resulting in the inability to construct on site, which was likely to affect the critical construction period of the project.

[0003] Considering that purchasing double-head vibrator equipment from China may solve this problem, this equipment is currently in the research stage. It takes a lot of money and time to transport it from China to the site. It cannot be transported to the site in a short time, which seriously affects the construction period. Considering the site requirements, other measures have to be considered. For example: try to use a well drilling rig to carry out hole-guiding operations on site, in order to open up a channel for the vibrating equipment. However, due to the high groundwater level on site, the hole wall is very easy to collapse after encountering water flow impact, which makes it difficult to make substantial progress in the hole-guiding operation. Therefore, an economical and efficient hole-guiding device is urgently needed in the foreign construction process to quickly solve the problems encountered in the construction. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a dense sand and gravel layer drilling device, aiming to solve the problems of scarce foreign equipment, tight construction period, and inability of vibratory impact equipment to penetrate thick dense sand layers, thereby ensuring the normal progress of gravel construction.

[0005] The utility model is achieved in this way:

[0006] A device for drilling a hole in a compacted sand and gravel layer comprises a drill bit and a drill rod, wherein the drill bit is arranged at the lower end of the drill rod, and the upper end of the drill rod can be detachably connected to a drilling rig; a rotary drilling component is arranged on the side wall of the drill rod, and the drilling rig drives the drill bit and the rotary drilling component to rotate to complete the drilling work;

[0007] The rotary drilling component comprises an upper rotary drilling plate away from the drill bit and a lower rotary drilling plate close to the drill bit; two identical upper rotary drilling plates are radially symmetrically arranged on the side wall of the drill pipe, and two identical lower rotary drilling plates are radially symmetrically arranged on the side wall of the drill pipe; the plane where the upper rotary drilling plate is located is perpendicular to the plane where the lower rotary drilling plate is located;

[0008] It also includes two pairs of support rods fixed between the upper rotary drilling plate and the lower rotary drilling plate; both sides of each of the lower rotary drilling plates are symmetrically fixed to the lower ends of a pair of support rods, and the upper ends of the support rods are respectively fixed to the side surfaces of the corresponding two upper rotary drilling plates; each of the upper rotary drilling plate and the lower rotary drilling plate is provided with a drag reduction hole.

[0009] As a preferred technical solution, the upper rotary drilling plate and the lower rotary drilling plate are both fan-shaped, one straight side of the fan-shaped plate is parallel to the drill pipe axis and welded to the side wall of the drill pipe, the other straight side is perpendicular to the drill pipe axis, and the arc side of the fan-shaped plate is downward.

[0010] As a preferred technical solution, the horizontal plane where the lowest point of the upper rotary drilling plate is located is lower than the horizontal plane where the highest point of the lower rotary drilling plate is located.

[0011] As a preferred technical solution, the distance between the lowest point of the lower rotary drilling plate and the lower end of the drill rod is no more than 5 cm.

[0012] As a preferred technical solution, the dimensions of the upper rotary drilling plate and the lower rotary drilling plate are 45 cm in side length and 2 cm in thickness.

[0013] As a preferred technical solution, the drag reduction hole is a circular hole with a diameter of 5 cm.

[0014] As a preferred technical solution, the drill bit includes an inverted tapered drill body and a plurality of blades evenly distributed and fixed on the tapered surface of the drill body, the lower ends of the blades converge to the bottom tip of the drill body; the top plane of the drill body is welded to the lower end of the drill rod.

[0015] As a preferred technical solution, the drill rod is cylindrical, and the axis of the drill rod is consistent with the axis of the drill bit.

[0016] As a preferred technical solution, the radius of the drill rod is smaller than the radius of the drill bit.

[0017] As a preferred technical solution, the length of the support rod is 25 cm.

[0018] The utility model has the following advantages and technical effects:

[0019] The dense sand and gravel layer drilling device of the utility model is an economical and efficient drilling device. In foreign construction, if a dense sand layer is unable to continue drilling, there is no need to re-purchase new equipment, and the dense sand layer can be quickly penetrated for construction. Compared with re-purchasing new equipment from domestic sources, it not only saves time and procurement costs, but also facilitates operation and construction, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the dense sand and gravel layer drilling device of the utility model;

[0021] Figure 2 It is a front view of the dense sand and gravel layer drilling device of the utility model;

[0022] Figure 3 for Figure 2 Right view of;

[0023] Figure 4 for Figure 2 Top view of the .

[0024] In the figure: 1. drill bit; 11. drill bit body; 12. blade; 2. drill rod; 3. rotary drilling component; 31. upper rotary drilling plate; 32. lower rotary drilling plate; 4. drag reduction hole; 5. support rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0026] like Figures 1 to 4 As shown, the utility model discloses a device for drilling a hole in a compacted sand and gravel layer, comprising a drill bit 1 and a drill rod 2, wherein the drill bit 1 is arranged at the lower end of the drill rod 2, and the upper end of the drill rod 2 can be detachably connected to a drilling rig; a rotary drilling component 3 is arranged on the side wall of the drill rod 2, and the drill bit 1 and the rotary drilling component 3 are driven to rotate by the drilling rig to complete the drilling work;

[0027] The drill bit 1 includes an inverted conical drill bit body 11 and a plurality of blades 12 evenly distributed and fixed on the conical surface of the drill bit body 11. The lower ends of the blades 12 converge at the tip of the drill bit body 11 to facilitate downward drilling. The top plane of the drill bit body 11 is welded to the lower end of the drill rod 2, so that the rotation of the drill rod 2 drives the rotation of the drill bit body 11 and the blades 12 to crush sand and gravel to form a wellbore.

[0028] Preferably, the drill bit 1 is made of steel; steel has good properties in terms of hardness, toughness, and wear resistance, which prevents the drill bit 1 from being damaged during use, reduces the frequency of replacement, and improves work efficiency.

[0029] The drill rod 2 is cylindrical, and the axis of the drill rod 2 is consistent with the axis of the drill bit 1, so that the rotation of the drill rod 2 and the drill bit 1 is kept consistent, thereby reducing the error in the hole-guiding process.

[0030] Preferably, the radius of the drill rod 2 is smaller than the radius of the drill bit 1 .

[0031] Further preferably, the drill rod 2 is made of steel, thereby improving the stability and service life of the drill rod 2.

[0032] The rotary digging member 3 comprises an upper rotary digging plate 31 away from the drill bit 1 and a lower rotary digging plate 32 close to the drill bit 1; two identical upper rotary digging plates 31 are radially symmetrically arranged on the side wall of the drill rod 2, and two identical lower rotary digging plates 32 are radially symmetrically arranged on the side wall of the drill rod 2; the plane where the upper rotary digging plate 31 is located is perpendicular to the plane where the lower rotary digging plate 32 is located;

[0033] Preferably, the upper rotary drilling plate 31 and the lower rotary drilling plate 32 are both fan-shaped, with one straight side of the fan parallel to the axial direction of the drill rod 2 and welded to the side wall of the drill rod 2, and the other straight side perpendicular to the axial direction of the drill rod 2. The arc side of the fan is downward, and the fan-shaped design reduces the friction between the rotary drilling plate and the surrounding sand; during the hole-guiding process, the upper rotary drilling plate 31 and the lower rotary drilling plate 32 rotate at the same time to fully stir the sand and mud, thereby achieving the effect of mud wall protection and preventing hole collapse.

[0034] Further preferably, the horizontal plane where the lowest point of the upper rotary drilling plate 31 is located is lower than the horizontal plane where the highest point of the lower rotary drilling plate 32 is located, thereby avoiding the influence of stone jam on the hole-guiding effect.

[0035] Further preferably, the size of each upper rotary drilling plate 31 and lower rotary drilling plate 32 is 45 cm in side length and 2 cm in thickness. The consistent size ensures that the upper rotary drilling plate 31 and lower rotary drilling plate 32 are evenly stressed during construction, thereby improving service life.

[0036] Preferably, each of the upper rotary drilling plate 31 and the lower rotary drilling plate 32 is provided with a drag reducing hole 4, which reduces the resistance of the sand layer to the rotary drilling plate and reduces the damage rate of the upper rotary drilling plate 31 and the lower rotary drilling plate 32; if multiple drag reducing holes 4 are provided, the strength of the upper rotary drilling plate 31 and the lower rotary drilling plate 32 will be reduced, and they will be easily broken, affecting the progress of the project.

[0037] Further preferably, the drag reduction hole 4 is a circular hole with a diameter of 5 cm.

[0038] Preferably, both sides of each of the lower rotary digging plates 32 are symmetrically fixed to the lower ends of a pair of support rods 5, and the upper ends of the support rods 5 are respectively welded to the sides of the corresponding two upper rotary digging plates 31, thereby improving the stability of the upper rotary digging plates 31 and the lower rotary digging plates 32 and reducing the damage to the upper rotary digging plates 31 and the lower rotary digging plates 32 caused by sand and gravel with higher hardness during the hole-guiding process.

[0039] Further preferably, the support rod 5 is 25 cm long.

[0040] Preferably, the upper rotary drilling plate 31, the lower rotary drilling plate 32 and the support rod 5 are made of steel; all steel materials can be obtained on site and assembled quickly, saving time and procurement costs, while also facilitating operation and construction and improving construction efficiency.

[0041] The distance between the lowest point of the lower rotary drilling plate 32 and the lower end of the drill rod 2 is not greater than 5 cm. If the distance is too large, stones are easily stuck in the gap, thus affecting the construction effect.

[0042] Working principle:

[0043] In foreign construction, if the dense sand layer cannot be drilled any more, the dense sand gravel layer drilling device of the utility model can be prepared on-site. The drill bit 1 is welded to the lower end of the drill rod 2, and the upper rotary excavation plate 31 and the lower rotary excavation plate 32 are welded to the side wall of the drill rod 2. The plane where the upper rotary excavation plate 31 is located is perpendicular to the plane where the lower rotary excavation plate 32 is located; the lower rotary excavation plate 32 is welded and fixed to the upper rotary excavation plate 31 through the support rod 5; the sand and the mud are fully mixed by the rotation of the upper rotary excavation plate 31 and the lower rotary excavation plate 32 to achieve the effect of mud wall protection. Each of the upper rotary excavation plate 31 and the lower rotary excavation plate 32 is provided with at least one drag reduction hole 4, which reduces the resistance of the sand layer to the rotary excavation plate and reduces the damage rate of the upper rotary excavation plate 31 and the lower rotary excavation plate 32. After the drilling is completed, the vibratory flushing equipment is immediately used to carry out the gravel pile construction, thereby ensuring the normal progress of the gravel pile construction. There is no need to re-purchase new equipment to quickly penetrate the dense sand layer for construction. Compared with re-purchasing new equipment from domestic sources, it not only saves time and procurement costs, but also facilitates operation and construction, thereby improving construction efficiency.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drilling device for a dense sand and gravel layer, comprising a drill bit (1) and a drill rod (2), wherein the drill bit (1) is provided at the lower end of the drill rod (2), and the upper end of the drill rod (2) is detachably connected to a drilling rig; characterized in that: A rotary drilling component (3) is provided on the side wall of the drill rod (2), and the drilling rig drives the drill bit (1) and the rotary drilling component (3) to rotate to complete the hole drilling work; The rotary digging component (3) comprises an upper rotary digging plate (31) away from the drill bit (1) and a lower rotary digging plate (32) close to the drill bit (1); two identical upper rotary digging plates (31) are radially symmetrically arranged on the side wall of the drill rod (2), and two identical lower rotary digging plates (32) are radially symmetrically arranged on the side wall of the drill rod (2); the plane where the upper rotary digging plate (31) is located is perpendicular to the plane where the lower rotary digging plate (32) is located; It also includes two pairs of support rods (5) fixed between the upper rotary digging plate (31) and the lower rotary digging plate (32); both sides of each lower rotary digging plate (32) are symmetrically fixed to the lower ends of a pair of support rods (5), and the upper ends of the support rods (5) are respectively fixed to the side surfaces of the corresponding two upper rotary digging plates (31); and each upper rotary digging plate (31) and the lower rotary digging plate (32) is provided with a drag reduction hole (4).

2. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 1, characterized in that: The upper rotary drilling plate (31) and the lower rotary drilling plate (32) are both fan-shaped, one straight side of the fan-shaped plate is parallel to the axial direction of the drill rod (2) and is welded to the side wall of the drill rod (2), the other straight side is perpendicular to the axial direction of the drill rod (2), and the arc side of the fan-shaped plate is downward.

3. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 2, characterized in that: The horizontal plane where the lowest point of the upper rotary excavation plate (31) is located is lower than the horizontal plane where the highest point of the lower rotary excavation plate (32) is located.

4. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 3, characterized in that: The distance between the lowest point of the lower rotary drilling plate (32) and the lower end of the drill rod (2) is no more than 5 cm.

5. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 4, characterized in that: The dimensions of the upper rotary digging plate (31) and the lower rotary digging plate (32) are 45 cm in side length and 2 cm in thickness.

6. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 1, characterized in that: The drag reduction hole (4) is a circular hole with a diameter of 5 cm.

7. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 1, characterized in that: The drill bit (1) comprises an inverted conical drill bit body (11) and a plurality of blades (12) evenly distributed and fixed on the conical surface of the drill bit body (11), the lower ends of the blades (12) converge at the bottom tip of the drill bit body (11); the top plane of the drill bit body (11) is welded to the lower end of the drill rod (2).

8. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 1, characterized in that: The drill rod (2) is cylindrical, and the axis of the drill rod (2) is consistent with the axis of the drill bit (1).

9. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 8, characterized in that: The radius of the drill rod (2) is smaller than the radius of the drill bit (1).

10. The device for drilling holes in a compacted sand and gravel layer as claimed in claim 1, characterized in that: The support rod (5) is 25 cm long.

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