CFG drilling machine device for square pile construction

Abstract

The invention discloses a CFG drilling machine device for square pile construction, and belongs to the technical field of foundation treatment. The device comprises a drilling assembly, the drilling assembly comprises a spiral drill rod and a drill bit which are connected, the outer wall of the spiral drill rod is provided with drill rod spiral blades, the drill rod spiral blades extend outwards to form a plurality of blade protruding parts arranged at equal intervals, and the drill rod spiral blades are in a triangle-like shape on the vertical projection plane; the square pile limiter is provided with a square limiting hole; the spiral drill rod penetrates through the limiting hole, and the blade protruding part of the drill rod spiral blade abuts against the inner wall of the limiting hole. And the rotary driving mechanism is connected with the spiral drill rod. Under the condition of the same bearing capacity, the length of the pile body can be reduced, and the construction cost is saved. According to the construction mode, the square pile is in a square shape, the large impact resistance is achieved, more materials are distributed at the corners of the square pile, and the lateral shearing force and torque effect can be better resisted.

Description

Technical Field

[0001] The invention relates to the technical field of foundation treatment, and in particular to a CFG drilling rig device for constructing square piles. Background Art

[0002] Long spiral bored pile technology is a new type of pile foundation construction method evolved from Japan's CIP method. This technology uses a special long spiral drilling machine to drill to a predetermined depth, and continuously pumps superfluid concrete into the hole through the drill valve until the top of the pile. This technology is not limited by the groundwater level. The concrete used has a low friction coefficient, strong fluidity, and good aggregate dispersion, making the construction operation simple, the concrete pouring speed fast, the pile quality good, and can reduce the cost. The construction characteristics of long spiral bored pile technology include:

[0003] 1. Superfluid concrete has good fluidity. Stones can be suspended in the concrete without sinking and will not segregate, making it easy to put into the steel cage.

[0004] 2. There is no loose soil at the pile tip, which prevents common construction problems such as broken piles, shrinkage, and hole collapse, and the construction quality is easily guaranteed.

[0005] 3. It has strong ability to penetrate hard soil layers, high single pile bearing capacity, high construction efficiency and easy operation.

[0006] 4. Low noise, no disturbance to others, no need for mud wall protection, no sewage discharge, no precipitation, no soil squeezing, and civilized construction site.

[0007] 5. The comprehensive benefits are high and the engineering cost is relatively low compared with other pile types.

[0008] The traditional CFG construction method is round piles, which are widely used due to their simple construction process and convenient construction. However, round piles have disadvantages such as low bearing capacity, too long pile body, high project cost, and weak impact resistance. Summary of the invention

[0009] The purpose of the present invention is to provide a CFG drilling rig device for constructing square piles, which can improve the bearing capacity while reducing the use of raw materials, saving resources and achieving sustainable development.

[0010] In order to solve the above technical problems, the present invention provides a CFG drilling rig device for constructing square piles, comprising:

[0011] A drilling assembly, comprising a connected auger rod and a drill bit, wherein the outer wall of the auger rod is provided with a drill rod spiral blade, wherein the drill rod spiral blade extends outward to form a plurality of blade protrusions arranged at equal distances, and wherein the drill rod spiral blade is a triangular-shaped part on a vertical projection plane;

[0012] A square pile limiter is provided with a square limit hole; the spiral drill rod passes through the limit hole, and the blade protrusion of the spiral blade of the drill rod abuts against the inner wall of the limit hole;

[0013] A rotary drive mechanism is connected to the auger rod; the rotary drive mechanism is used to provide power for the rotation of the auger rod to open a hole.

[0014] Preferably, adjacent blade protrusions are spaced apart by one-third of an arc on a vertical projection plane.

[0015] Preferably, the three sides of the triangle-like shape of the drill pipe spiral blade on the vertical projection plane are all in the shape of circular arcs protruding outwards.

[0016] Preferably, the four corners of the limiting hole are rounded.

[0017] Preferably, a universal joint is provided between the rotary drive mechanism and the auger rod.

[0018] Preferably, a first connecting rod is mounted on the output shaft of the rotary drive mechanism;

[0019] A second connecting rod is installed on the auger rod;

[0020] The two ends of the universal joint are respectively provided with a first connecting hole and a second connecting hole;

[0021] The first connecting rod passes through the first connecting hole;

[0022] The second connecting rod passes through the second connecting hole.

[0023] Preferably,

[0024] The diameter of the first connecting hole is greater than the diameter of the first connecting rod;

[0025] The diameter of the second connecting hole is greater than the diameter of the second connecting rod.

[0026] Preferably, the rotary drive mechanism is mounted on the power head.

[0027] Preferably, a connecting piece is installed on the square pile limiter;

[0028] The square pile limiter is fixedly connected to the power head via a connecting piece.

[0029] Preferably, the auger rod and the drill bit are detachably connected;

[0030] The outer wall of the drill bit is provided with a drill bit spiral blade.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] After the construction of the present invention, a square pile is formed, which has a large bearing capacity. When the cross section is the same, the surface area and rigidity of the square pile are larger than those of the round pile. Therefore, under the condition of obtaining the same bearing capacity, the length of the pile body can be reduced, saving the construction cost.

[0033] In addition, square piles have better durability in harsh environments. They are square in shape and can resist greater impact. There is more material distributed at the corners of the square piles, which can better resist lateral shear and torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0035] Figure 1 It is a structural schematic diagram of a CFG drilling rig device for constructing square piles according to the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of the auger rod;

[0037] Figure 3 It is a structural diagram of the drill bit;

[0038] Figure 4 It is a schematic diagram of the structure of the square pile stopper used in conjunction with the auger rod;

[0039] Figure 5 It is a structural diagram of the drill pipe spiral blade and the limit hole used in conjunction with each other;

[0040] Figure 6 It is a schematic diagram of the overall structure of the drilling rig.

[0041] In the figure:

[0042] 1-rotation drive mechanism; 2-drilling assembly; 21-auger rod; 211-drill rod spiral blade; 212-blade protrusion; 22-drill bit; 221-drill bit spiral blade; 3-square pile limiter; 31-limiting hole; 32-connecting piece; 4-universal joint; 41-first connecting rod; 42-second connecting rod; 43-first connecting hole; 44-second connecting hole; 5-power head. DETAILED DESCRIPTION

[0043] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0044] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0045] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0047] The present invention provides a CFG drilling rig device for constructing square piles, comprising:

[0048] A drilling assembly 2, comprising a connected auger 21 and a drill bit 22, wherein the outer wall of the auger 21 is provided with a drill spiral blade 211, wherein the drill spiral blade 211 extends outward to form a plurality of blade protrusions 212 arranged at equal intervals, and the drill spiral blade 211 is a triangular shape on a vertical projection plane;

[0049] The square pile limiter 3 is provided with a square limit hole 31; the spiral drill rod 21 passes through the limit hole 31, and the blade protrusion 212 of the spiral blade 211 of the drill rod abuts against the inner wall of the limit hole 31;

[0050] The rotary drive mechanism 1 is connected to the auger rod 21 ; the rotary drive mechanism 1 is used to provide power for the auger rod 21 to rotate and open a hole.

[0051] Preferably, adjacent blade protrusions 212 are spaced apart by one-third of an arc on a vertical projection plane.

[0052] Preferably, the three sides of the triangle-like shape of the drill pipe spiral blade 211 on the vertical projection plane are all in the shape of arcs protruding outwards.

[0053] Preferably, the four corners of the limiting hole 31 are rounded.

[0054] Preferably, a universal joint 4 is provided between the rotary drive mechanism 1 and the auger rod 21 .

[0055] Preferably, a first connecting rod 41 is installed on the output shaft of the rotary drive mechanism 1;

[0056] A second connecting rod 42 is installed on the auger rod 21;

[0057] The two ends of the universal joint 4 are respectively provided with a first connection hole 43 and a second connection hole 44;

[0058] The first connecting rod 41 passes through the first connecting hole 43;

[0059] The second connecting rod 42 passes through the second connecting hole 44 .

[0060] Preferably, the diameter of the first connecting hole 43 is larger than the diameter of the first connecting rod 41;

[0061] The diameter of the second connecting hole 44 is greater than the diameter of the second connecting rod 42 .

[0062] Preferably, the rotary drive mechanism 1 is installed on the power head 5 .

[0063] Preferably, a connecting piece 32 is installed on the square pile limiter 3;

[0064] The square pile limiter 3 is fixedly connected to the power head 5 via a connecting piece 32 .

[0065] Preferably, the auger rod 21 and the drill bit 22 are detachably connected;

[0066] The outer wall of the drill bit 22 is provided with a drill bit spiral blade 221 .

[0067] In order to better illustrate the technical effect of the present invention, the present invention provides the following specific embodiments to illustrate the above technical process:

[0068] Embodiment 1: A CFG drilling rig device for constructing square piles, comprising a drilling assembly 2, a square pile stopper 3, a rotation drive mechanism 1 and a universal joint 4.

[0069] The rotary drive mechanism 1 provides power to the auger rod 21; the auger rod 21 with different axes is connected to the rotary drive mechanism 1 of the power head 5 through the connection of the universal joint 4; the square pile limiter 3 is fixed to the power head 5, allowing the auger rod 21 to rotate inside the square limit hole 31 opened therein, thereby forming a square pile.

[0070] The spiral pitch of the drill pipe spiral blade 211 is 300 mm. The closer the drill pipe spiral blade 211 on the spiral drill pipe 21 is to the blade protrusion 212, the wider it is, and the farther away from the blade protrusion 212, the narrower it is. The width of the blade protrusion 212 at the widest part of the drill pipe spiral blade 211 is 140 mm, and the width of the drill pipe spiral blade 211 at the narrowest part is 86.5 mm. The drill pipe spiral blade 211 used in this embodiment can form a square pile more stably.

[0071] Under the condition of the same bearing capacity, the present invention can reduce the length of the pile body and save the engineering cost.

[0072] The construction method of the present invention has a square shape and has a greater impact resistance. The square piles can better resist lateral shear and torque.

[0073] The construction process of a CFG drilling rig device for constructing square piles of the present invention is as follows:

[0074] The drilling rig is in place, and the drill bit 22 is aligned with the pile point, so that the error is no more than 2cm. After it is in place, the drilling construction begins. When the designed depth is reached, the spiral drill rod 21 is lifted, and the concrete pouring conduit is inserted. The distance between the bottom end of the conduit and the bottom of the hole is no more than 300-500mm, and the concrete pouring begins. The depth of the conduit buried in the concrete should be 2-6m. The conduit should be strictly raised out of the concrete pouring surface. The pouring of underwater concrete must be continuous, and the last pouring volume should be controlled. The excess height should be 0.8-1.0m. After the slurry is removed, the exposed pile top concrete strength must be guaranteed to reach the design grade.

[0075] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A CFG drilling rig for constructing square piles, characterized in that: include: A drilling assembly (2), comprising a connected spiral drill rod (21) and a drill bit (22), wherein the outer wall of the spiral drill rod (21) is provided with a drill rod spiral blade (211), wherein the drill rod spiral blade (211) extends outward to form a plurality of blade protrusions (212) arranged at equal intervals, and wherein the drill rod spiral blade (211) is quasi-triangular in shape on a vertical projection plane; A square pile limiter (3) is provided with a square limit hole (31); the spiral drill rod (21) passes through the limit hole (31), and the blade protrusion (212) of the spiral blade (211) of the drill rod abuts against the inner wall of the limit hole (31); A rotary drive mechanism (1) is connected to a spiral drill rod (21); the rotary drive mechanism (1) is used to provide power for the spiral drill rod (21) to rotate and open a hole.

2. The CFG drilling rig device for constructing square piles according to claim 1, characterized in that: Adjacent blade protrusions (212) are spaced apart by one-third of a circular arc on a vertical projection plane.

3. The CFG drilling rig device for constructing square piles according to claim 2, characterized in that: The three sides of the triangle-like shape of the drill pipe spiral blade (211) on the vertical projection plane are all in the shape of circular arcs protruding outwards.

4. The CFG drilling rig device for constructing square piles according to claim 3, characterized in that: The four corners of the limiting hole (31) are rounded.

5. The CFG drilling rig device for constructing square piles according to claim 1, characterized in that: A universal joint (4) is provided between the rotary drive mechanism (1) and the auger rod (21).

6. The CFG drilling rig device for constructing square piles according to claim 5, characterized in that: A first connecting rod (41) is mounted on the output shaft of the rotary drive mechanism (1); A second connecting rod (42) is installed on the auger rod (21); The two ends of the universal joint (4) are respectively provided with a first connecting hole (43) and a second connecting hole (44); The first connecting rod (41) passes through the first connecting hole (43); The second connecting rod (42) passes through the second connecting hole (44).

7. The CFG drilling rig for constructing square piles according to claim 6, characterized in that: The diameter of the first connecting hole (43) is greater than the diameter of the first connecting rod (41); The diameter of the second connecting hole (44) is greater than the diameter of the second connecting rod (42).

8. The CFG drilling rig device for constructing square piles according to claim 1, characterized in that: The rotary drive mechanism (1) is mounted on a power head (5).

9. The CFG drilling rig device for constructing square piles according to claim 8, characterized in that: A connecting piece (32) is installed on the square pile stopper (3); The square pile limiter (3) is fixedly connected to the power head (5) via a connecting piece (32).

10. The CFG drilling rig device for constructing square piles according to claim 1, characterized in that: The auger rod (21) and the drill bit (22) are detachably connected; The outer wall of the drill bit (22) is provided with a drill bit spiral blade (221).

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