Pile machine rotary excavating supporting structure of rock slope and construction method

Abstract

The invention relates to the technical field of building construction, in particular to a pile machine rotary excavating supporting structure of a rock slope and a construction method.The pile machine rotary excavating supporting structure comprises a steel cylinder arranged in a pile hole, the steel cylinder is formed by sequentially connecting a plurality of steel cylinder units, a tubular outer supporting column is arranged in the center of the inner side of the steel cylinder, and the outer supporting column and the steel cylinder units extend in the same direction; a movable column is arranged in the outer supporting column, a plurality of sets of adjustable supporting assemblies are installed on the outer supporting column and the movable column, each adjustable supporting assembly comprises a supporting base plate, the adjustable supporting assemblies support the steel cylinder through the supporting base plates, and the supporting base plates are all located on the inner sides of the connecting positions of the steel cylinder units; the steel cylinder units designed in an assembly mode are adopted, the transportation difficulty is reduced, and flexibility is good; through connection of the connector, the connecting groove, the first unit connecting piece and the second unit connecting piece, the connecting strength is guaranteed; the outer supporting columns, the movable columns and the adjustable supporting assemblies are designed, so that the steel cylinder, especially the connecting part, can be supported.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a pile driver rotary drilling support structure for a rock slope and a construction method. Background Art

[0002] Bored piles are a type of pile foundation commonly used in foundation engineering. Bored piles are holes drilled in the ground or rock to provide space for construction work, while rotary drilling holes are circular holes. After the excavation is completed, due to geological reasons, the inner wall composition of the foundation pit is complex and needs to be supported by materials to form a supporting structure to withstand the pressure of the surrounding rock and soil to prevent collapse. However, most of the existing bored piles directly use cylindrical steel tubes to put in the bored piles. However, when the local pressure of the rock and soil is too large, it is easy to cause local deformation of the steel tube, and then the whole tube bends, causing danger. Summary of the invention

[0003] The purpose of the present invention is to provide a reasonably designed pile driver rotary drilling support structure and construction method for rock slopes in view of the defects and shortcomings of the prior art, which can solve the above-mentioned defects.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: it includes a steel cylinder arranged in the pile hole, the steel cylinder is composed of multiple steel cylinder units connected in sequence, a tubular outer support column is arranged at the center of the inner side of the steel cylinder, the extension direction of the outer support column is the same as that of the steel cylinder unit, a movable column is arranged inside the outer support column, a plurality of groups of adjustable support assemblies are installed on the outer support column and the movable column, the adjustable support assemblies include support pads, the adjustable support assemblies support the steel cylinder through the support pads, and the support pads are all located on the inner side of the connection of the steel cylinder unit.

[0005] Preferably, the adjustable support assembly includes a support rod 1 connected between the outer support column and the support pad, a support rod 2 is connected between the movable column and the support pad, a movable groove is opened on the outer support column, and the support rod 2 is arranged through the movable groove, both ends of the support rod 1 and the support rod 2 are hinged, and the support rod 1 and the support rod 2 are arranged in an "eight" shape; a cover shell is provided on the top of the outer support column, and a driving assembly for driving the movable column is provided in the cover shell.

[0006] Preferably, the driving assembly includes a threaded column connected to the top of the movable column, a worm wheel is provided in the cover shell, the upper and lower ends of the worm wheel are respectively connected to the cover shell and the movable column through bearings, an internal thread is opened in the worm wheel, the worm wheel is connected to the threaded column through threads, a worm is provided in the cover shell, the worm is meshed with the worm wheel, a driving motor is provided on the outside of the cover shell, and the rotating shaft of the driving motor is transmission connected to the worm.

[0007] Preferably, a plurality of unit connectors 1 are evenly installed along the circumference at the inner top position of the steel cylinder unit, and a plurality of unit connectors 2 are evenly installed along the circumference at the inner bottom end of the steel cylinder unit, screw holes are opened on unit connector 1 and connector 2, and the unit connector 1 and connector 2 on adjacent steel cylinder units are connected by connecting bolts, and both unit connector 1 and connector 2 are "L" shaped structures.

[0008] Preferably, an annular connecting head is provided at the top of the steel cylinder unit, a connecting groove matching the connecting head is opened at the bottom of the steel cylinder unit, the connecting head of the steel cylinder unit is inserted into the connecting groove of another adjacent steel cylinder unit, and the inner and outer surfaces of the two steel cylinder units are flush.

[0009] Preferably, one end of the worm is movably inserted through the cover shell, a mounting plate is provided on the outer side of the cover shell, a drive motor is mounted on the mounting plate, a rotating shaft of the drive motor is connected to the worm through a coupling, and the drive motor is detachably mounted.

[0010] Preferably, a bolt head slot is formed at the screw hole of the second unit connector, and the head of the connecting bolt is clamped in the bolt head slot.

[0011] Preferably, triangular reinforcement members are respectively provided at the side installation positions of the unit connector 1 and the unit connector 2.

[0012] Preferably, a construction method of a pile driver rotary drilling support structure for a rock slope comprises the following steps:

[0013] S1. Confirm and measure the pile hole position on the slope. After confirming the position, the pile driver moves to the designated position, adjusts the drill rod angle, and starts drilling.

[0014] S2, prepare steel cylinders, prepare steel cylinder units of a specified number of sections according to the depth of the pile hole, transport multiple sections of steel cylinder units to the construction site in sequence, adjust the positions of the steel cylinder units by means of a crane, so that the two sections of the steel cylinder units are aligned front and back, and the unit connector 1 and the unit connector 2 are relatively staggered, and the connecting head of one steel cylinder unit is inserted into the connecting groove of the other steel cylinder unit. After the crane is lowered, personnel enter the steel cylinder unit, install the connecting bolts into the bolt head slots in sequence, install the nuts and tighten them, and connect the multiple sections of the steel cylinder units in sequence;

[0015] S3. Assemble the outer support column, movable column and adjustable support assembly at the designated site according to the requirements, or transport the required accessories to the construction site for assembly, and weld the cover shell and the outer support column to ensure strength; after the assembly is completed, connect the drive motor and start it to drive the movable column to move toward one side of the cover shell, so that the outer dimension of the structure formed by the multiple support pads is smaller than the inner dimension of the steel cylinder unit, and then stop the drive motor;

[0016] S4. After the pile hole reaches the designed depth, the geological conditions are verified and then the parameters of the pile hole are checked;

[0017] S5. Lift the steel cylinder by crane and place it into the pile hole;

[0018] S6. Use a crane to hoist the structure consisting of the outer support column, the movable column and the adjustable support assembly, and align it with the steel cylinder and place it. During the lowering process, pay attention to the staggered position of the adjustable support assembly and the unit connector to prevent collision;

[0019] S7, start the drive motor, and after double deceleration, drive the threaded column, the movable column and one end of the support rod 2 to start pressing down relative to the outer support column. The support rod 1 and the support rod 2 form a nearly triangular structure. The support rod 2 pushes the support pad outward to reinforce the steel cylinder and ensure that the strength of the steel cylinder, especially the connection between the steel cylinder units, is sufficient.

[0020] Preferably, after the above step S4, the process further includes cleaning the hole after the pile hole parameters are confirmed to be correct.

[0021] After adopting the above structure, the beneficial effects of the present invention are:

[0022] 1. The present invention adopts an assembled steel cylinder unit to reduce the difficulty of transportation, and can adopt a suitable number of steel cylinder units according to design requirements without additional customization, which has good flexibility.

[0023] 2. The present invention provides preliminary support through the connecting head and the connecting groove to enhance the shear resistance of the steel cylinder unit connection. The connection of multiple unit connecting parts 1 and 2 enables multi-point connection between the steel cylinder units, further enhancing the connection strength. The triangular reinforcement member increases the strength of the connecting part. The bolt head slot allows the connecting bolt to be automatically limited during installation to prevent rotation, making it convenient for personnel to install.

[0024] 3. The present invention designs an outer support column, a movable column and an adjustable support assembly, which can be installed separately with the steel cylinder. After installation, the driving motor rotates to drive the worm to drive the worm wheel to rotate, and then the threaded column and the movable column are driven to move up and down through the thread in the worm wheel, so that the movable column can drive one end of the support rod two to move up and down, and the support rod one and the support rod two form a structure approximately in a triangle. When the movable column is pressed down, the support rod two pushes the support pad to move outward until it reaches the inner side of the steel cylinder to support the steel cylinder. Since the support position is at the connection of the steel cylinder unit, the strength of the connection is also enhanced during support to ensure the strength of the steel cylinder. The output of the driving motor is decelerated twice to ensure that the output torque is large enough. Moreover, since multiple support pads are connected to the movable column and directly form an integrated structure with each other, when a single support pad is subjected to force, the remaining adjustable support assemblies can also share part of the pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0027] Figure 3 yes Figure 1 Enlarged view of middle part B;

[0028] Figure 4 It is a top view of the present invention after installation;

[0029] Figure 5 It is a schematic diagram of the connection method of the internal structure of the housing in the present invention;

[0030] Figure 6 It is a schematic diagram of the connection method of the steel cylinder unit in the present invention;

[0031] Figure 7 It is a schematic diagram of the connection structure of the steel cylinder units in the present invention.

[0032] Description of reference numerals:

[0033] 1. Slope; 2. Steel cylinder unit; 3. Connector; 4. Connecting groove; 5. Unit connector 1; 6. Unit connector 2; 7. Bolt head slot; 8. Triangular reinforcement; 9. External support column; 10. Movable column; 11. Support pad; 12. Support rod 1; 13. Movable groove; 14. Support rod 2; 15. Cover; 16. Threaded column; 17. Bearing;

[0034] 18. Worm wheel; 19. Worm; 20. Mounting plate; 21. Driving motor; 22. Connecting bolts. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 5As shown, it includes a steel cylinder arranged in a pile hole, the steel cylinder is composed of multiple steel cylinder units 2 connected in sequence, a tubular outer support column 9 is arranged at the center of the inner side of the steel cylinder, the outer support column 9 has the same extension direction as the steel cylinder unit 2, a movable column 10 is arranged inside the outer support column 9, a plurality of groups of adjustable support components are installed on the outer support column 9 and the movable column 10, the adjustable support components include support pads 11, the adjustable support components support the steel cylinder through the support pads 11, and the support pads 11 are all located on the inner side of the connection of the steel cylinder unit 2;

[0037] The adjustable support assembly includes a support rod 12 connected between the outer support column 9 and the support pad 11, a support rod 2 14 is connected between the movable column 10 and the support pad 11, a movable groove 13 is opened on the outer support column 9, and the support rods 2 14 are arranged through the movable groove 13. Both ends of the support rod 12 and the support rod 2 14 are hinged, and the support rod 12 and the support rod 2 14 are arranged in an "eight" shape; a cover 15 is provided on the top of the outer support column 9, and a driving assembly for driving the movable column 10 is provided in the cover 15;

[0038] The driving assembly includes a threaded column 16 connected to the top of the movable column 10, a worm wheel 18 is provided in the cover 15, the upper and lower ends of the worm wheel 18 are respectively connected to the cover 15 and the movable column 10 through bearings 17, an internal thread is opened in the worm wheel 18, the worm wheel 18 is connected to the threaded column 16 through a thread, a worm 19 is provided in the cover 15, the worm 19 is meshed with the worm wheel 18, a driving motor 21 is provided on the outside of the cover 15, one end of the worm 19 is movably inserted through the cover 15, a mounting plate 20 is provided on the outside of the cover 15, a driving motor 21 is installed on the mounting plate 20, the rotating shaft of the driving motor 21 is connected to the worm 19 through a coupling, and the driving motor 21 is detachably installed.

[0039] By driving the motor 21 to rotate, the worm 19 drives the worm wheel 18 to rotate, and then the threaded column 16 and the movable column 10 are driven to move up and down through the thread in the worm wheel 18, so that the movable column 10 can drive one end of the support rod 2 14 to move up and down, and the support rod 1 12 and the support rod 2 14 form a structure approximately in a triangle. When the movable column 10 is pressed down, the support rod 2 14 pushes the support pad 11 to move outward until it reaches the inner side of the steel cylinder to support the steel cylinder. Since the support position is at the connection of the steel cylinder unit 2, the strength of the connection is also enhanced during support to ensure the strength of the steel cylinder. The output of the driving motor 21 has undergone two decelerations to ensure that the output torque is large enough. Since multiple support pads 11 are connected to the movable column 10, they directly form an integrated structure with each other. When a single support pad 11 is subjected to force, the remaining adjustable support components can also share part of the pressure.

[0040] See also Figure 1-Figure 7As shown, a plurality of unit connectors 1 5 are evenly installed along the circumference at the inner top position of the steel cylinder unit 2, and a plurality of unit connectors 2 6 are evenly installed along the circumference at the inner bottom end of the steel cylinder unit 2. Screw holes are provided on the unit connectors 1 5 and the connectors 2. The unit connectors 1 5 and the connectors 2 on adjacent steel cylinder units 2 are connected by connecting bolts 22. The unit connectors 1 5 and the connectors 2 are both "L"-shaped structures; a bolt head slot 7 is provided at the screw hole of the unit connector 2 6, and the head of the connecting bolt 22 is clamped in the bolt head slot 7;

[0041] The side installation positions of the unit connection member 1 5 and the unit connection member 2 6 are respectively provided with triangular reinforcement members 8;

[0042] An annular connecting head 3 is provided at the top of the steel cylinder unit 2, and a connecting groove 4 matching with the connecting head 3 is opened at the bottom of the steel cylinder unit 2. The connecting head 3 of the steel cylinder unit 2 is inserted into the connecting groove 4 of another adjacent steel cylinder unit 2, and the inner and outer surfaces of the two steel cylinder units 2 are flush.

[0043] Preliminary support is provided by the connecting head 3 and the connecting groove 4, so that the shear resistance of the connection of the steel cylinder unit 2 can be enhanced, and the connection of multiple unit connecting parts 1 5 and unit connecting parts 2 6 allows multi-point connection between the steel cylinder units 2, further enhancing the connection strength. The triangular reinforcement 8 increases the strength of the connecting parts, and the bolt head slot 7 allows the connecting bolt 22 to be automatically limited during installation to prevent rotation, thereby facilitating installation by personnel.

[0044] A construction method of a pile driver rotary drilling support structure for a rock slope comprises the following steps:

[0045] S1. Confirm and measure the pile hole position on the slope 1. After confirming the position, the pile driver moves to the designated position, adjusts the drill rod angle, and starts drilling.

[0046] S2, prepare steel cylinders, prepare steel cylinder units 2 of a specified number of sections according to the depth of the pile hole, transport the multiple sections of steel cylinder units 2 to the construction site in sequence, adjust the positions of the steel cylinder units 2 by means of a crane, so that the two sections of the steel cylinder units 2 are aligned front and back, the unit connector 1 5 and the unit connector 2 6 are relatively staggered, and the connecting head 3 of one steel cylinder unit 2 is inserted into the connecting groove 4 of the other steel cylinder unit 2. After the crane is lowered, personnel enter the steel cylinder unit 2, sequentially install the connecting bolts 22 into the bolt head slots 7 and install the nuts and tighten them, and sequentially connect the multiple sections of the steel cylinder units 2;

[0047] S3. According to the requirements, the outer support column 9, the movable column 10 and the adjustable support assembly are assembled at the designated site, or the required accessories are transported to the construction site for assembly, and the cover 15 and the outer support column 9 are welded to ensure the strength; after the assembly is completed, the drive motor 21 is connected and started to drive the movable column 10 to move toward one side of the cover 15, so that the outer dimension of the structure formed by the multiple support pads 11 is smaller than the inner dimension of the steel cylinder unit 2, and then the drive motor 21 is stopped;

[0048] S4. After the pile hole reaches the designed depth, the geological conditions are verified, and then the pile hole parameters are checked; after the pile hole parameters are confirmed to be correct, the hole is cleaned;

[0049] S5. Lift the steel cylinder by crane and place it into the pile hole;

[0050] S6. Use a crane to hoist the structure consisting of the outer support column 9, the movable column 10 and the adjustable support assembly, and align it with the steel cylinder and place it. During the lowering process, pay attention to staggering the adjustable support assembly and the unit connection piece 5 to prevent collision;

[0051] S7, start the drive motor 21, and after double deceleration, drive the threaded column 16, the movable column 10 and one end of the support rod 14 to begin to press downward relative to the outer support column 9. The support rod 12 and the support rod 14 form a nearly triangular structure. The support rod 14 pushes the support pad 11 outward to reinforce the steel cylinder and ensure that the strength of the steel cylinder, especially the connection between the steel cylinder unit 2, is sufficient.

[0052] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A pile driver rotary drilling support structure for a rock slope, comprising a steel cylinder arranged in a pile hole, characterized in that: The steel cylinder is composed of a plurality of steel cylinder units (2) connected in sequence. A tubular outer support column (9) is provided at the center of the inner side of the steel cylinder. The outer support column (9) extends in the same direction as the steel cylinder unit (2). A movable column (10) is provided inside the outer support column (9). A plurality of groups of adjustable support components are installed on the outer support column (9) and the movable column (10). The adjustable support components include support pads (11). The adjustable support components support the steel cylinder through the support pads (11), and the support pads (11) are all located on the inner side of the connection of the steel cylinder unit (2).

2. A pile driver rotary drilling support structure for rock slope according to claim 1, characterized in that: The adjustable support assembly comprises a support rod 1 (12) connected between an outer support column (9) and a support pad (11); a support rod 2 (14) connected between the movable column (10) and the support pad (11); a movable groove (13) is provided on the outer support column (9); the support rod 2 (14) is arranged through the movable groove (13); both ends of the support rod 1 (12) and the support rod 2 (14) are hinged, and the support rod 1 (12) and the support rod 2 (14) are arranged in an "eight" shape; a cover shell (15) is provided on the top of the outer support column (9); a driving assembly for driving the movable column (10) is provided in the cover shell (15).

3. A pile driver rotary drilling support structure for rock slope according to claim 2, characterized in that: The driving assembly comprises a threaded column (16) connected to the top of the movable column (10), a worm wheel (18) is arranged in the housing (15), the upper and lower ends of the worm wheel (18) are respectively connected to the housing (15) and the movable column (10) through bearings (17), an internal thread is formed in the worm wheel (18), the worm wheel (18) is connected to the threaded column (16) through threads, a worm (19) is arranged in the housing (15), the worm (19) is meshed with the worm wheel (18), a driving motor (21) is arranged outside the housing (15), and the rotating shaft of the driving motor (21) is transmission-connected to the worm (19).

4. The pile driver rotary drilling support structure for rock slope according to claim 1, characterized in that: A plurality of unit connecting members (5) are evenly installed along the circumference at the inner top of the steel cylinder unit (2), and a plurality of unit connecting members (6) are evenly installed along the circumference at the inner bottom of the steel cylinder unit (2). Screw holes are provided on the unit connecting members (5) and the connecting members (6). The unit connecting members (5) and the connecting members (6) on adjacent steel cylinder units (2) are connected by connecting bolts (22). The unit connecting members (5) and the connecting members (6) are both "L" shaped structures.

5. The pile driver rotary drilling support structure for rock slope according to claim 1, characterized in that: The top of the steel cylinder unit (2) is provided with an annular connecting head (3), the bottom of the steel cylinder unit (2) is provided with a connecting groove (4) which fits with the connecting head (3), the connecting head (3) of the steel cylinder unit (2) is inserted into the connecting groove (4) of another adjacent steel cylinder unit (2), and the inner and outer surfaces of the two steel cylinder units (2) are flush.

6. The pile driver rotary drilling support structure for rock slope according to claim 3, characterized in that: One end of the worm (19) is movably inserted through the housing (15), a mounting plate (20) is provided on the outer side of the housing (15), a driving motor (21) is mounted on the mounting plate (20), a rotating shaft of the driving motor (21) is connected to the worm (19) via a coupling, and the driving motor (21) is detachably mounted.

7. The pile driver rotary drilling support structure for rock slope according to claim 4, characterized in that: A bolt head slot (7) is provided at the screw hole of the second unit connecting member (6), and the head of the connecting bolt (22) is clamped in the bolt head slot (7).

8. The pile driver rotary drilling support structure for rock slope according to claim 4, characterized in that: The side installation positions of the unit connecting member 1 (5) and the unit connecting member 2 (6) are respectively provided with triangular reinforcement members (8).

9. A construction method for a pile driver rotary drilling support structure for a rock slope according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Confirm and measure the pile hole position on the slope (1). After confirming the position, the pile driver moves to the designated position, adjusts the drill rod angle, and starts drilling. S2, prepare steel cylinders, prepare steel cylinder units (2) of a specified number of sections according to the depth of the pile hole, transport the multiple sections of steel cylinder units (2) to the construction site in sequence, adjust the positions of the steel cylinder units (2) by means of a crane, so that the two sections of the steel cylinder units (2) are aligned front and back, the unit connecting piece 1 (5) and the unit connecting piece 2 (6) are relatively staggered, and the connecting head (3) of one steel cylinder unit (2) is inserted into the connecting groove (4) of the other steel cylinder unit (2). After the crane is lowered, a person enters the steel cylinder unit (2), sequentially installs the connecting bolts (22) into the bolt head slots (7), installs the nuts and tightens them, and sequentially connects the multiple sections of the steel cylinder units (2); S3. According to the requirements, the outer support column (9), the movable column (10) and the adjustable support assembly are assembled at the designated site, or the required accessories are transported to the construction site for assembly, and the cover (15) and the outer support column (9) are welded to ensure the strength; after the assembly is completed, the drive motor (21) is connected and started to drive the movable column (10) to move toward one side of the cover (15), so that the outer dimension of the structure formed by the multiple support pads (11) is smaller than the inner dimension of the steel cylinder unit (2), and then the drive motor (21) is stopped; S4. After the pile hole reaches the designed depth, the geological conditions are verified and then the parameters of the pile hole are checked; S5. Lift the steel cylinder by crane and place it into the pile hole; S6. Use a crane to hoist the structure consisting of the outer support column (9), the movable column (10) and the adjustable support assembly, and align it with the steel cylinder and place it there. During the lowering process, pay attention to staggering the adjustable support assembly and the unit connection piece (5) to prevent collision. S7, start the driving motor (21), and after double deceleration, drive the threaded column (16), the movable column (10) and one end of the second support rod (14) to start pressing downward relative to the outer support column (9), and the first support rod (12) and the second support rod (14) form a nearly triangular structure. The second support rod (14) pushes the support pad (11) outward to reinforce the steel cylinder and ensure that the strength of the steel cylinder, especially the connection of the steel cylinder unit (2), is sufficient.

10. The construction method of a pile driver rotary drilling support structure for a rock slope according to claim 9, characterized in that: After the above step S4, the process also includes cleaning the hole after the pile hole parameters are confirmed to be correct.

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