Diameter-variable spiral drill rod inclined supporting device

Abstract

The utility model relates to the technical field of foundation pit supporting, and discloses a variable-diameter spiral drill rod inclined supporting device which comprises a drill rod main body and a foundation pit fender pile, an enclosing purlin is installed at the upper end of the foundation pit fender pile, spiral blades are evenly arranged on the outer portion of the drill rod main body from top to bottom, a butt joint column is installed at the upper end of the drill rod main body, and the butt joint column is connected with the foundation pit fender pile. A butt-joint rod is installed above the drill rod body, a butt-joint hole is formed in the lower end of the butt-joint rod, an extension rod is movably connected into the butt-joint rod, and an adjusting mechanism is jointly arranged on the outer surface of the butt-joint rod and the outer surface of the extension rod. The spiral blade is arranged, the drill rod body can be inserted into soil through the spiral blade and a screwing type mechanical arm, different from a traditional inclined strut, a hole guiding or grouting mode does not need to be adopted, and a threaded rod in the adjusting mechanism is rotated to drive the extension rod to stretch out of or retract into the butt joint rod; therefore, the length of the whole drill rod body is adjusted, and the inclined supporting device can meet the supporting requirements of different depths and different angles.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a variable diameter spiral drill rod oblique support device. Background Art

[0002] With the continuous development of cities, the number and scale of building foundation pits are getting larger and larger. In order to ensure the construction safety of underground structures and reduce the adverse impact on the surrounding environment, it is necessary to adopt support, reinforcement and other protective measures on the side walls and surrounding areas of the foundation pit. The traditional foundation pit support method mainly includes vertical retaining piles combined with horizontal or inclined support systems to form a support structure;

[0003] In the prior art, horizontal supports are easily restricted by the red line of the land, inconvenient to dig, long construction period, high cost and other problems. The traditional inclined steel pipe front support has limited resistance due to the small circumference and area of ​​the steel pipe cross-section. It requires extra-long size and dense arrangement to meet the bearing capacity requirements. Therefore, in many cases, its economy and applicability are not strong.

[0004] A Chinese patent discloses an A-type spiral grouting anchor-supported self-stabilizing steel support foundation pit retaining structure (authorization announcement number CN220486467U). Grouting at the bottom of the pit in this patented technology can effectively improve the bearing capacity of the bottom of the pit. The spiral blades greatly improve the compressive and tensile bearing capacity of the front support anchor, reduce the deformation of the pit top of the retaining structure, and improve the anti-overturning and anti-uplift of the pit bottom.

[0005] However, it has certain disadvantages: the length of the entire steel pipe is fixed and cannot be adjusted, which will greatly limit the device's ability to adapt to support requirements of different depths and angles, and when encountering supports that require different lengths, it is necessary to replace it with a drill rod of appropriate length, or the entire support device needs to be rebuilt, which will greatly increase the time for building and adjusting the support device and reduce work efficiency. Utility Model Content

[0006] The utility model aims to provide a variable diameter spiral drill rod oblique support device to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A variable diameter spiral drill rod oblique support device comprises a drill rod body and foundation pit guard piles, the upper ends of the foundation pit guard piles are equipped with surrounding purlins, the outside of the drill rod body is evenly arranged with spiral blades from top to bottom, the upper end of the drill rod body is equipped with a docking column, and a docking rod is installed above the drill rod body, the lower end of the docking rod is provided with a docking hole, and the inside of the docking rod is movably connected with an extension rod, and the outer surfaces of the docking rod and the extension rod are jointly provided with an adjustment mechanism.

[0009] As a further solution of the utility model: the adjustment mechanism includes two first fixed blocks at the front and rear and two second fixed blocks at the front and rear, the lower surface of the first fixed block at the rear side is rotatably connected with a threaded rod, the lower end of the threaded rod is installed with a fixed column, and the lower surface of the first fixed block at the front side is installed with a sliding rod.

[0010] As a further solution of the utility model: a connection mechanism is arranged at the upper end of the extension rod, and the connection mechanism comprises a connection plate, and a plurality of connection bolts are movably penetrated and connected to the lower surface of the connection plate.

[0011] As a further solution of the utility model: the cross-section of the spiral blade gradually increases from one end of the drill rod body to the other end, the upper surface of the drill rod body fits the lower surface of the docking rod, and the docking column is threadedly connected to the inside of the docking hole.

[0012] As a further solution of the utility model: the two first fixing blocks are respectively installed on the front and rear side surfaces of the upper end of the extension rod, the two second fixing blocks are respectively installed on the front and rear side surfaces of the upper end of the docking rod, the threaded rod is threadedly connected to the rear second fixing block, and the sliding rod movably passes through the front second fixing block.

[0013] As a further solution of the utility model: the connecting plate is installed on the lower surface of the surrounding purlin, and the upper end of the connecting bolt is threadedly connected to the inside of the surrounding purlin.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model is provided with spiral blades, and the drill rod body can be inserted into the soil through the spiral blades by a screwing manipulator. Different from the traditional inclined support, it does not need to adopt the form of hole drawing or grouting; the diameter of the spiral blades gradually changes from one end to the other end, adapting to different soil layers, and can play a better supporting effect.

[0016] 2. The utility model is provided with an adjustment mechanism. Rotating the threaded rod in the adjustment mechanism can drive the extension rod to extend or retract into the docking rod, thereby adjusting the length of the entire drill rod body, so that the inclined support device can adapt to the support requirements of different depths and angles, and can complete the construction and adjustment of the support device more quickly, reducing the time required for re-construction or adjustment due to inappropriate length. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a variable diameter spiral drill rod oblique support device;

[0018] Figure 2 It is a partial schematic diagram of a variable diameter spiral drill rod oblique support device;

[0019] Figure 3 for Figure 2 A magnified view of middle;

[0020] Figure 4 The present invention is a schematic diagram of the structure of an adjustment mechanism in a variable diameter spiral drill rod inclined support device.

[0021] In the figure: 1. drill rod body; 2. foundation pit guard pile; 3. surrounding purlin; 4. spiral blade; 5. docking column; 6. docking rod; 7. docking hole; 8. extension rod; 9. adjustment mechanism; 10. first fixing block; 11. second fixing block; 12. threaded rod; 13. fixing column; 14. sliding rod; 15. connecting mechanism; 16. connecting plate; 17. connecting bolt. DETAILED DESCRIPTION

[0022] See also Figure 1 and Figure 2 In the embodiment of the utility model, a variable diameter spiral drill rod oblique support device includes a drill rod body 1 and a foundation pit guard pile 2, a purlin 3 is installed on the upper end of the foundation pit guard pile 2, and spiral blades 4 are evenly arranged on the outside of the drill rod body 1 from top to bottom, and the cross section of the spiral blades 4 gradually increases from one end of the drill rod body 1 to the other end;

[0023] The drill rod body 1 is used to support the foundation pit guard pile 2, which is inserted into the foundation pit at an angle through a screw-type manipulator, and its lower end is conical, which is convenient for drilling into the soil; the foundation pit guard pile 2 is used to support the side wall of the foundation pit, and the lower end portion is inserted into the foundation pit;

[0024] The cross section of the spiral blade 4 can be gradually increased from top to bottom or from bottom to top by the drill pipe body 1. Through this gradual spiral blade 4, it can adapt to different soil layers and does not require grouting, reducing the time of diagonal support construction; the spiral cross section spacing of the spiral blade 4 is about 600mm, and its cross section length is 600mm-1200mm.

[0025] exist Figures 1 to 4In the middle: a docking column 5 is installed at the upper end of the drill rod body 1, and a docking rod 6 is installed above the drill rod body 1, the upper surface of the drill rod body 1 fits the lower surface of the docking rod 6, a docking hole 7 is opened at the lower end of the docking rod 6, the docking column 5 is threadedly connected to the inside of the docking hole 7, and an extension rod 8 is movably connected to the inside of the docking rod 6. An adjustment mechanism 9 is commonly provided on the outer surfaces of the docking rod 6 and the extension rod 8. The adjustment mechanism 9 includes two front and rear first fixing blocks 10 and two front and rear second fixing blocks 11. The two first fixing blocks 10 are respectively installed on the front and rear side surfaces of the upper end of the extension rod 8, and the two second fixing blocks 11 are respectively installed on the front and rear side surfaces of the upper end of the docking rod 6. A threaded rod 12 is rotatably connected to the lower surface of the rear first fixing block 10, and the threaded rod 12 is threadedly connected to the rear second fixing block 11, and a fixing column 13 is installed at the lower end of the threaded rod 12. A sliding rod 14 is installed on the lower surface of the front first fixing block 10, and the sliding rod 14 movably passes through the front second fixing block 11;

[0026] Rotating the threaded rod 12 can drive the extension rod 8 to extend or retract from the docking rod 6, thereby adjusting the length of the entire drill rod, so that the inclined support device can adapt to the support requirements of different depths and angles, and can complete the construction and adjustment of the support device more quickly, reducing the time required for re-construction or adjustment due to inappropriate length.

[0027] exist Figure 1 and Figure 4 Middle: The upper end of the extension rod 8 is provided with a connection mechanism 15, and the connection mechanism 15 includes a connection plate 16, and the connection plate 16 is installed on the lower surface of the surrounding purlin 3. The lower surface of the connection plate 16 is movably penetrated and connected with a plurality of connection bolts 17, and the upper end of the connection bolt 17 is threadedly connected to the inside of the surrounding purlin 3;

[0028] The drill rod body 1 and the foundation pit protection pile 2 are connected together by the connecting bolt 17, which is different from the existing welding method, so that the two are easy to disassemble.

[0029] The working principle of the utility model is as follows: when in use, the staff inserts the drill rod body 1 into the soil at the bottom of the foundation pit through a screwing manipulator, fits the foundation pit guard pile 2 to the side wall of the foundation pit, and then sleeves the docking rod 6 with the docking column 5 on the drill rod body 1 through the docking hole 7, thereby installing the drill rod body 1 and the docking rod 6 together; then, the rotating fixing column 13 drives the threaded rod 12 to rotate, so that the extension rod 8 is retracted into the inside of the docking rod 6 or extends from the inside of the docking rod 6, and when the connecting plate 16 and the surrounding purlin 3 are in the same vertical line, the foundation pit guard pile 2 is inserted into the soil, so that the surrounding purlin 3 fits the connecting plate 16, and then the surrounding purlin 3 and the connecting plate 16 are fixed together by the connecting bolt 17, thereby completing the installation of the entire inclined support device.

[0030] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A variable diameter spiral drill rod oblique support device, comprising a drill rod body (1) and a foundation pit guard pile (2), wherein a surrounding purlin (3) is installed at the upper end of the foundation pit guard pile (2), characterized in that: The outside of the drill rod body (1) is evenly provided with spiral blades (4) from top to bottom, the upper end of the drill rod body (1) is provided with a docking column (5), and a docking rod (6) is installed above the drill rod body (1), a docking hole (7) is provided at the lower end of the docking rod (6), and an extension rod (8) is movably connected inside the docking rod (6), and an adjustment mechanism (9) is commonly provided on the outer surfaces of the docking rod (6) and the extension rod (8).

2. The variable diameter spiral drill rod oblique support device according to claim 1, characterized in that: The adjustment mechanism (9) comprises two front and rear first fixed blocks (10) and two front and rear second fixed blocks (11); the lower surface of the first fixed block (10) on the rear side is rotatably connected to a threaded rod (12); a fixing column (13) is installed at the lower end of the threaded rod (12); and a sliding rod (14) is installed on the lower surface of the first fixed block (10) on the front side.

3. The variable diameter spiral drill rod oblique support device according to claim 1, characterized in that: A connecting mechanism (15) is provided at the upper end of the extension rod (8), and the connecting mechanism (15) comprises a connecting plate (16), and a plurality of connecting bolts (17) are movably penetrated and connected to the lower surface of the connecting plate (16).

4. The variable diameter spiral drill rod oblique support device according to claim 1, characterized in that: The cross section of the spiral blade (4) gradually increases from one end of the drill rod body (1) to the other end, the upper surface of the drill rod body (1) fits the lower surface of the docking rod (6), and the docking column (5) is threadedly connected to the inside of the docking hole (7).

5. The variable diameter spiral drill rod oblique support device according to claim 2, characterized in that: The two first fixing blocks (10) are respectively mounted on the front and rear side surfaces of the upper end of the extension rod (8), and the two second fixing blocks (11) are respectively mounted on the front and rear side surfaces of the upper end of the docking rod (6). The threaded rod (12) is threadedly connected to the rear second fixing block (11), and the sliding rod (14) movably penetrates the front second fixing block (11).

6. The variable diameter spiral drill rod oblique support device according to claim 3, characterized in that: The connecting plate (16) is mounted on the lower surface of the surrounding purlin (3), and the upper end of the connecting bolt (17) is threadedly connected to the inside of the surrounding purlin (3).

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