Automatic reaming drill rod device for soft soil exploration

Abstract

The utility model relates to an automatic reaming drill rod device for soft soil exploration, which comprises a male thick joint, a triangular rubber belt, bow-shaped steel bars, drill rods and a female thick joint, the bow-shaped steel bars are welded on two sides of a first drill rod connected with a drill bit in a staggered manner, and the triangular rubber belt is bound in the middle of an arching section of the bow-shaped steel bars. The bow-shaped steel bars are mainly used for reaming in soft soil exploration drilling, and the triangular rubber belt is mainly used for rapidly protecting the wall of slurry and dredging and making slurry. According to the automatic reaming drill rod device for the soft soil exploration, accidents of drill hole shrinkage and drill burying caused by the fact that the wall protection of slurry is not in place in the soft soil exploration drilling process are greatly reduced, and the automatic reaming drill rod device plays a positive role in the development of the geotechnical engineering exploration industry.

Description

Technical Field

[0001] The utility model relates to the technical field of field drilling in geotechnical engineering investigation, and particularly relates to an automatic hole-expanding drill rod device for soft soil investigation. Background Art

[0002] Soft soil has poor engineering geological characteristics such as high water content, large void ratio, low strength, high compressibility, and high sensitivity. When disturbed, its stress state changes, it is prone to structural damage, resulting in strength reduction, and has thixotropy and rheology and other characteristics.

[0003] Just because soft soil has these characteristics, during the drilling process of soft soil investigation, due to the inadequate slurry wall protection, accidents such as borehole shrinkage and drill pipe sticking often occur. This not only wastes the construction period, but also makes it difficult to obtain undisturbed soil, which has a serious impact on the correct acquisition of the physical and mechanical properties of soft soil in the later stage. This problem poses a new challenge to soft soil investigation.

[0004] In the existing geotechnical engineering investigation technology, the commonly used methods for preventing borehole shrinkage are: high-quality slurry wall protection, casing wall protection, the method of repeatedly reaming up and down, etc. No matter which method for preventing borehole shrinkage is used, it is not only time-consuming, but also wastes manpower and material resources. Summary of the Utility Model

[0005] In order to solve the technical problems existing in the prior art, the utility model provides an automatic hole-expanding drill rod device for soft soil investigation to effectively prevent borehole shrinkage during the drilling process of soft soil investigation.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] An automatic hole-expanding drill rod device for soft soil investigation includes a male thick joint, a drill rod, a female thick joint, and several hole-expanding components. The male thick joint and the female thick joint are respectively fixed at both ends of the drill rod, and the hole-expanding components are arranged staggeredly on both sides of the drill rod. The hole-expanding component includes a bow-shaped steel bar and a triangular rubber belt that are connected to each other.

[0008] As a preferred technical solution, the bow-shaped steel bar is composed of an arch section and two vertical sections. The two vertical sections are symmetrically arranged at both ends of the arch section and are an integral structure with the arch section. The vertical sections are welded to the drill rod.

[0009] As a preferred technical solution, the sum of the height of the arch section of the bow-shaped steel bars on both sides of the drill rod and the drill rod diameter is greater than the drill bit diameter.

[0010] As a preferred technical solution, the bow-shaped steel bar is made of HPB235 steel bar with a diameter of 8mm.

[0011] As a preferred technical solution, the length of the triangular rubber belt is the same as the length of the arch section of the bow-shaped steel bar.

[0012] As a preferred technical solution, the V-belt is fixed to the middle of the arch section of the bow-shaped steel bar by nylon ties.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The automatic hole-expanding drill rod device for soft soil exploration of the present utility model can not only quickly and conveniently expand the hole automatically, but also has a simple structure, is easy to manufacture, has high efficiency, reliable safety, low price, and can effectively prevent the occurrence of hole shrinkage during the drilling process of soft soil exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of the automatic hole-expanding drill rod device for soft soil exploration of the present utility model;

[0016] Figure 2 FIG. is a schematic plan sectional view of the automatic hole-expanding drill rod device for soft soil exploration of the present utility model;

[0017] Figure 3 FIG. is a schematic top view of the automatic hole-expanding drill rod device for soft soil exploration of the present utility model;

[0018] Figure 4 FIG. is a schematic structural diagram of the bow-shaped steel bar and the rubber belt in the automatic hole-expanding drill rod device for soft soil exploration of the present utility model.

[0019] In the figures: 1. male thick joint; 2. V-belt; 21. front section of the V-belt; 22. rear section of the V-belt; 23. nylon tie; 3. bow-shaped steel bar; 31. vertical section; 32. arch section; 4. drill rod; 5. female thick joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solution of the present utility model will be further described below in conjunction with the specific embodiments:

[0021] As Figure 1 shown, an automatic hole-expanding drill rod device for soft soil exploration, as Figure 2 and Figure 3 shown, includes a male thick joint 1, a drill rod 4, a female thick joint 5 and a plurality of hole-expanding components. The male thick joint 1 and the female thick joint 5 are respectively fixed at both ends of the drill rod 4. The hole-expanding components are arranged staggeredly on both sides of the drill rod 4. The hole-expanding components include a bow-shaped steel bar 3 and a V-belt 2 which are connected to each other.

[0022] As Figure 4 shown, the bow-shaped steel bar 3 is composed of an arch section 32 and two vertical sections 31. The two vertical sections 31 are symmetrically arranged at both ends of the arch section 32 and are an integral structure with the arch section 32. The vertical section 31 is welded to the drill rod 4.

[0023] During the in-situ geotechnical investigation, when the drill bit drills into the soft soil layer, the arching section 32 of the bow-shaped steel bar 3 evenly pushes the soft soil during the rapid rotation process, playing a role in hole expansion.

[0024] The sum of the height of the arching section 32 of the bow-shaped steel bars 3 on both sides of the drill pipe 4 and the diameter of the drill pipe 4 is slightly larger than the diameter of the drill bit.

[0025] The bow-shaped steel bar 3 is made of HPB235 steel bar with a diameter of 8 mm.

[0026] The length of the triangular rubber belt 2 is the same as the length of the arching section 32 of the bow-shaped steel bar 3.

[0027] The triangular rubber belt 2 is fixed to the middle of the arching section 32 of the bow-shaped steel bar 3 by nylon ties 23.

[0028] At the middle of the arching section 32 of the bow-shaped steel bar 3, the triangular rubber belt 2 is tied with high-strength nylon ties 23. During the rapid rotation of the bow-shaped steel bar 3, the front section 21 of the triangular rubber belt evenly smears the mud on the hole wall of the drill hole quickly, playing a role in rapid mud hole protection. During the rapid shaking of the rear section 22 of the triangular rubber belt, the silt deposited on the arching section 32 of the bow-shaped steel bar 3 is removed, and mud is quickly made.

[0029] This embodiment is only a further explanation of the present invention, not a limitation to the present invention. Those skilled in the art can make non-creative modifications to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. An automatic hole enlarging drill rod device for soft soil exploration, characterized in that: It includes a male thick joint, a drill rod, a female thick joint and several hole expansion components. The male thick joint and the female thick joint are respectively fixed at both ends of the drill rod. The hole expansion components are staggered and arranged on both sides of the drill rod. The hole expansion components include bow-shaped steel bars and triangular rubber belts connected to each other.

2. The automatic hole enlarging drill rod device for soft soil exploration according to claim 1 is characterized in that: The bow-shaped steel bar consists of an arch section and two upright sections. The two upright sections are symmetrically arranged at both ends of the arch section and are an integral structure with the arch section. The upright sections are welded to the drill rod.

3. The automatic hole enlarging drill rod device for soft soil exploration according to claim 2 is characterized in that: The sum of the height of the arched sections of the bow-shaped steel bars on both sides of the drill rod and the diameter of the drill rod is greater than the diameter of the drill bit.

4. The automatic hole enlarging drill rod device for soft soil exploration according to claim 1, characterized in that: The bow-shaped steel bar is HPB235 steel bar with a diameter of 8 mm.

5. The automatic hole enlarging drill rod device for soft soil exploration according to claim 2 is characterized in that: The length of the triangular rubber belt is consistent with the length of the arched section of the bow-shaped steel bar.

6. The automatic hole enlarging drill rod device for soft soil exploration according to claim 2, characterized in that: The triangular rubber belt is fixed to the middle part of the arched section of the bow-shaped steel bar through a nylon tie.

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