CFG drilling machine device for square pile construction

Abstract

The utility model 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, large impact resistance is achieved, more materials are distributed at the corners of the square pile, and lateral shearing force and torque effects can be better resisted.

Description

Technical Field

[0001] This utility model relates to the field of foundation treatment technology, specifically to a CFG drilling rig device for constructing square piles. Background Technology

[0002] Long spiral bored pile technology is a new type of pile foundation construction method evolved from the Japanese CIP method. This technology uses a specialized long spiral drilling machine to drill to a predetermined depth, and then continuously pumps super-fluid concrete into the hole through a drill bit valve until the pile top is reached. This technology is not limited by groundwater levels, uses concrete with a low coefficient of friction, high fluidity, and good aggregate dispersion, making construction simple, concrete pouring fast, pile quality high, and cost-effective. The construction characteristics of long spiral bored pile technology include:

[0003] 1. Superfluid concrete has good fluidity, and the stones can be suspended in the concrete without sinking, which will not cause segregation and makes it easy to put into the reinforcing cage.

[0004] 2. The absence of loose soil at the pile tip prevents common construction problems such as pile breakage, diameter reduction, and hole collapse, making it easier to ensure construction quality.

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

[0006] 4. Low noise, no disturbance to residents, no need for mud wall protection, no sewage discharge, no water loss, no soil displacement, and civilized construction site.

[0007] 5. It has high overall benefits and its engineering cost is relatively low compared with other pile types.

[0008] The traditional CFG construction method is circular piles. Because the construction process of circular piles is simple and convenient, it has been widely promoted. However, circular piles have disadvantages such as low bearing capacity, excessive pile length, high project cost, and weak impact resistance. Utility Model Content

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

[0010] To solve the above-mentioned technical problems, this utility model provides a CFG drilling rig device for constructing square piles, comprising:

[0011] A drilling assembly includes a connected spiral drill rod and a drill bit. The spiral drill rod has spiral blades on its outer wall. The spiral blades extend outward to form several equally spaced blade protrusions. The spiral blades are triangular in shape on the vertical projection plane.

[0012] A square pile limiter has a square limit hole; the spiral drill rod passes through the limit hole, and the protruding part 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 drill rod; the rotary drive mechanism is used to provide power for the rotation of the auger drill rod to open holes.

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

[0015] Preferably, the three sides of the drill rod helical blade, which are quasi-triangular shapes projected onto the vertical projection plane, are all outwardly convex arcs.

[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 drill 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 drill rod;

[0020] The universal joint has a first connecting hole and a second connecting hole at each end;

[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 larger than the diameter of the first connecting rod;

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

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

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

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

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

[0030] The drill bit is provided with drill bit spiral blades on its outer wall.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] After construction, this utility model forms a square pile with a large bearing capacity. At the same cross-section, the surface area and stiffness of the square pile are larger than those of the round pile. Therefore, under the condition of obtaining the same bearing capacity, the pile length can be reduced, thus saving project costs.

[0033] In addition, square piles have better durability in harsh environments. Their square shape provides greater impact resistance, and the larger material distribution at the corners of square piles helps them better resist lateral shear and torque. Attached Figure Description

[0034] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0035] Figure 1 This is a structural schematic diagram of a CFG drilling rig device for constructing square piles according to this utility model;

[0036] Figure 2 This is a schematic diagram of the structure of a spiral drill pipe;

[0037] Figure 3 This is a schematic diagram of the drill bit's structure;

[0038] Figure 4 This is a schematic diagram of the structure of a square pile limiter used in conjunction with a spiral drill rod;

[0039] Figure 5 This is a schematic diagram of the structure of the drill rod spiral blades used in conjunction with the limiting hole;

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

[0041] In the picture:

[0042] 1-Rotary drive mechanism; 2-Drilling assembly; 21-Auger rod; 211-Auger rod helical blade; 212-Blade protrusion; 22-Drill bit; 221-Drill bit helical blade; 3-Square pile limiter; 31-Limiting hole; 32-Connector; 4-Universal joint; 41-First connecting rod; 42-Second connecting rod; 43-First connecting hole; 44-Second connecting hole; 5-Power head. Detailed Implementation

[0043] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] The terminology used in one or more embodiments of this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this specification. The singular forms “a,” “described,” and “the” as used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as 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, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this specification, and similarly, second may also be referred to as first. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0046] The present invention will now be described in further detail with reference to the accompanying drawings:

[0047] This utility model provides a CFG drilling rig device for constructing square piles, comprising:

[0048] The drilling assembly 2 includes a connected spiral drill rod 21 and a drill bit 22. The outer wall of the spiral drill rod 21 is provided with a drill rod spiral blade 211. The drill rod spiral blade 211 extends outward to form a plurality of equally spaced blade protrusions 212. The drill rod spiral blade 211 is triangular in shape on the vertical projection plane.

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

[0050] A rotary drive mechanism 1 is connected to the auger drill rod 21; the rotary drive mechanism 1 is used to provide power for the rotational opening of the auger drill rod 21.

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

[0052] Preferably, the three sides of the drill rod helical blade 211, which is a triangular shape on the vertical projection plane, are all outwardly convex arcs.

[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 drill rod 21.

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

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

[0057] The universal joint 4 has a first connecting hole 43 and a second connecting hole 44 at both ends;

[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 larger than the diameter of the second connecting rod 42.

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

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

[0064] The square pile limiter 3 is fixedly connected to the power head 5 via the connector 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 drill bit spiral blades 221.

[0067] To better illustrate the technical effects of this utility model, the present utility model provides the following specific embodiments to explain the above technical process:

[0068] Example 1: A CFG drilling rig for constructing square piles, comprising a drilling assembly 2, a square pile limiter 3, a rotary drive mechanism 1, and a universal joint 4.

[0069] The rotary drive mechanism 1 provides power to the auger drill rod 21; the auger drill rods 21 with different shafts are 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 drill rod 21 to rotate inside its square limit hole 31, thereby forming a square pile.

[0070] The helical pitch of the drill rod auger blade 211 is 300mm. The drill rod auger blade 211 is wider closer to the blade protrusion 212 and narrower further away from the blade protrusion 212. The width of the blade protrusion 212 at the widest point of the drill rod auger blade 211 is 140mm, and the width at the narrowest point of the drill rod auger blade 211 is 86.5mm. The drill rod auger blade 211 used in this embodiment can form square piles more stably.

[0071] Under the same bearing capacity, this utility model can reduce the length of the pile body and save on project costs.

[0072] The construction method of this utility model has a square shape, which has a greater impact resistance. The square pile can better resist lateral shear force and torque.

[0073] The construction process of the CFG drilling rig device for constructing square piles according to this utility model is as follows:

[0074] Once the drilling rig is in place, align the drill bit 22 with the pile point, ensuring an error of no more than 2cm. Drilling then commences. Upon reaching the designed depth, lift the auger drill rod 21 and lower the concrete pouring tremie pipe. The distance between the bottom of the tremie pipe and the bottom of the hole should not exceed 300-500mm. Concrete pouring then begins. The tremie pipe should be embedded 2-6m into the concrete. The tremie pipe must be carefully removed from the concrete pouring surface. Underwater concrete pouring must be continuous. The final pour volume should be controlled, with an over-pour height of 0.8-1.0m. After removing the grout, the exposed concrete at the pile top must meet the design strength.

[0075] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A CFG drilling rig for constructing square piles, characterized in that, include: The drilling assembly (2) includes a connected spiral drill rod (21) and a drill bit (22). The spiral drill rod (21) has a drill rod spiral blade (211) on its outer wall. The drill rod spiral blade (211) extends outward to form a plurality of equally spaced blade protrusions (212). The drill rod spiral blade (211) is triangular in shape on the vertical projection plane. A square pile limiter (3) has a square limit hole (31); the spiral drill rod (21) passes through the limit hole (31), and the blade protrusion (212) of the drill rod spiral blade (211) abuts against the inner wall of the limit hole (31); A rotary drive mechanism (1) is connected to the auger rod (21); the rotary drive mechanism (1) is used to provide power for the rotational opening of the auger rod (21).

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

3. The CFG drilling rig device for constructing square piles according to claim 2, characterized in that: The drill pipe helical blade (211) has three outwardly convex arc-shaped sides on the vertical projection plane, which are similar to a triangle.

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 drill rod (21).

6. The CFG drilling rig 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 drill rod (21); The universal joint (4) has a first connecting hole (43) and a second connecting hole (44) at both ends; 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 device for constructing square piles according to claim 6, characterized in that: The diameter of the first connecting hole (43) is larger than the diameter of the first connecting rod (41); The diameter of the second connecting hole (44) is larger than the diameter of the second connecting rod (42).

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

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

10. The CFG drilling rig for constructing square piles according to claim 1, characterized in that: The auger rod (21) and drill bit (22) are detachably connected; The drill bit (22) has a drill bit helical blade (221) on its outer wall.

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