A weathered rock stratum rotary excavating pile steel casing fixing device

Abstract

The utility model belongs to rotary excavating pile steel casing field, concretely is a kind of weathered rock stratum rotary excavating pile steel casing fixing device, it includes: multiple fixed column, multiple fixed column is rectangularly laid, and detachably installed connecting rod between two adjacent fixed columns, the outer surface slidingly connected with support seat of connecting rod;Handle, the handle rotationally connected in support seat, and the end fixedly connected with gear of handle through to support seat inside portion one end.This utility model is cooperated by the structure such as gear, rack, support seat etc. that is set, can adjust the overall length when using by adjusting the distance between two connecting rods, not only convenient to dismount installation, but also can adapt the outer diameter demand of different steel casing, and cooperated by the structure such as ratchet wheel, jacks, first spring, second spring etc. that is set, can one-way locking gear rotation direction, avoid after installation due to accidental rotation, leading to connecting rod and fixed column fall off, affect construction progress.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary drilling pile steel casing, specifically a fixing device for rotary drilling pile steel casing in weathered rock strata. Background Technology

[0002] When drilling and grouting piles, manual excavation of the piles is required. However, due to the unstable soil conditions, it is difficult to construct reinforced concrete retaining walls. Therefore, steel retaining walls are used to protect the piles and prevent them from collapsing, thus avoiding affecting the construction progress and safety. This is where steel casings come in.

[0003] An existing patent (publication number: CN215977246U) discloses a steel casing fixing device for dry rotary drilling piles in slightly weathered rock strata. In use, this device connects and fixes two adjacent fixed piles through a first stop bar and a second stop bar. However, the length of the stop bar is fixed, and each length of stop bar can only be used for one size of steel casing, which has great limitations. Therefore, this utility model provides a steel casing fixing device for rotary drilling piles in weathered rock strata. Utility Model Content

[0004] This utility model aims to provide a fixing device for steel casing of rotary drilling piles in weathered rock strata, which can adjust the overall length during use by adjusting the distance between the two connecting rods. It is not only convenient for disassembly and installation, but also adaptable to different outer diameter requirements of steel casings.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A steel casing fixing device for rotary drilling piles in weathered rock strata includes:

[0007] Multiple fixed columns are arranged in a rectangular shape, and a connecting rod is detachably installed between two adjacent fixed columns. A support seat is slidably connected to the outer surface of the connecting rod.

[0008] The throttle is rotatably connected to the support base, and a gear is fixedly connected to one end of the throttle that extends into the support base. A rack is meshed with the upper and lower sides of the gear, and the rack is fixedly connected to the connecting rod.

[0009] A ratchet is fixed on a throttle and is coaxially arranged with a gear. A pawl engages with the outer surface of the ratchet. The pawl is rotatably connected to the inner wall of the support base. A first spring is fixedly connected to the bottom of the pawl, and a push rod is connected to the top of the pawl.

[0010] A positioning component is threadedly connected to the bottom of the support base.

[0011] Based on the above technical solution, its operating principle and the resulting technical effects are as follows:

[0012] In practical use, first determine the outer diameter of the steel casing, then determine and mark the positions of the four fixing posts based on the outer diameter of the steel casing. First, drive one fixing post into the ground, then partially drive another adjacent fixing post into the ground. Using a gravity ball and angle gauge, ensure the tops of the fixing posts are on the same plane. Then, based on the positions of the two adjacent fixing posts, first insert the connecting rod with the limit block into the mounting groove of one fixing post. Then, turn the handle counterclockwise, causing the ratchet and gear to rotate. Since the ratchet rotates in one direction only, locking will not occur. The gear then drives the racks on both sides to move to the sides simultaneously, thereby moving the connecting rods at both ends of the support base to the sides, inserting the limit block at the other end into the mounting groove of the adjacent fixing post. This completes the installation on one side. Then, use the same method to insert the connecting rod with the snap-fit ​​block into the mounting groove of the fixing post, ensuring the snap-fit ​​block engages with the strip on the limit block. Within the groove, effective installation and fixation can be completed. Then, rotate the four threaded rods to ensure they move the same length. Next, lower the steel casing so that the balls at the ends of the four threaded rods abut against the outer wall of the steel casing. This method limits and guides the steel casing when it is driven into sloping terrain, preventing tilting or displacement that could affect construction quality. When disassembling the connecting rod, first press down on the top rod to compress the pawl, unlocking the ratchet and gear. Then, rotate the gear clockwise to move the racks on both sides towards the center, causing the connecting rods at both ends to retract towards the center for quick disassembly. It should be noted that the connecting rod with the locking block should be disassembled first, followed by the connecting rod with the limiting block. This allows adjustment of the overall length during use by adjusting the distance between the two connecting rods, facilitating disassembly and installation and adapting to different outer diameter requirements of steel casings.

[0013] In a preferred embodiment, the present invention can be further configured such that: the number of fixing columns is four, the four fixing columns are arranged in a rectangular shape, and the bottom end of each of the four fixing columns is set as a cone shape.

[0014] In a preferred embodiment, the present invention can be further configured such that: the number of connecting rods is eight, wherein four connecting rods are fixedly connected to a snap-fit ​​block at their ends, and four connecting rods are fixedly connected to a limit block at their ends, and the limit block has a strip groove inside that is adapted to the snap-fit ​​block.

[0015] In a preferred embodiment, this utility model can be further configured such that: among the eight connecting rods, two connecting rods of the same shape are used as a group, and the two connecting rods in the group are slidably connected to the two ends of the support base in a mirror-symmetrical manner.

[0016] In a preferred embodiment, the present invention can be further configured such that: a guide strip is fixedly connected to the side of the connecting rod, and a guide groove adapted to the guide strip is provided on the inner wall of the support base.

[0017] In a preferred embodiment, the present invention can be further configured such that the top of the fixing column is provided with an installation groove that is compatible with the snap-fit ​​block and the limiting block.

[0018] In a preferred embodiment, the present invention can be further configured such that: a second spring is sleeved on the outer surface of the push rod, the push rod is slidably connected to the support seat, and pressing the push rod squeezes the pawl, which can disengage the pawl from the ratchet.

[0019] In a preferred embodiment, the present invention can be further configured such that: the number of racks is two, and the two racks are symmetrical about the center of the gear, and the whole is centrally symmetrically distributed.

[0020] In a preferred embodiment, the present invention can be further configured such that one end of the first spring is fixed to the pawl, and the other end is fixed to the inner wall of the support.

[0021] In a preferred embodiment, the present invention can be further configured such that: the positioning component includes a mounting block fixedly connected to the bottom of the support base, the mounting block having an internal threaded connection to a threaded rod, and a ball bearing installed at one end of the threaded rod.

[0022] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0023] A fixed connection refers to a connection in which parts or components are fixed in place, with no relative movement between them. These connections are divided into two types: detachable and non-detachable.

[0024] (1) Detachable connections use screws, splines, wedges, etc. to fix parts together. This type of connection can be disassembled during maintenance without damaging the parts. However, the specifications of the connecting parts used must be correct (such as the length of bolts, keys, wedges) and properly tightened.

[0025] (2) Non-removable connections mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxy-acetylene cutting for repair or replacement, these parts generally cannot be reused. Furthermore, attention should be paid to process quality, technical inspection, and remedial measures (such as correction and polishing) during connection.

[0026] A movable connection refers to a connection in which parts or components are fixed but have relative motion.

[0027] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0028] 1. This utility model, through the cooperation of gears, racks, support bases and other structures, can adjust the overall length during use by adjusting the distance between the two connecting rods, which not only facilitates disassembly and installation, but also adapts to the outer diameter requirements of different steel casings.

[0029] 2. This utility model, through the cooperation of the ratchet, push rod, first spring, second spring and other structures, can lock the rotation direction of the gear in one direction, so as to avoid the connecting rod from falling off the fixed column due to accidental rotation after installation, which would affect the construction process. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a three-dimensional schematic diagram of the fixed column structure of this utility model;

[0032] Figure 3 This is a three-dimensional schematic diagram of the gear structure of this utility model;

[0033] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0034] Figure label:

[0035] 1. Fixed post; 2. Connecting rod; 3. Support base; 4. Throttle; 5. Gear; 6. Rack; 7. Ratchet; 8. Pawl; 9. First spring; 10. Push rod; 11. Snap-fit ​​block; 12. Limiting block; 13. Strip groove; 14. Guide strip; 15. Mounting groove; 16. Second spring; 17. Positioning assembly; 171. Mounting block; 172. Threaded rod; 173. Ball bearing. Detailed Implementation

[0036] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features in the embodiments can be combined with each other.

[0037] Based on the concept of this application, combined with Figures 1 to 4This document describes an embodiment of a weathered rock rotary drilling pile steel casing fixing device for securing steel casings driven into sloping terrain. Specifically, the weathered rock rotary drilling pile steel casing fixing device is constructed as an integrated structure, comprising four components: a fixing post 1, a throttle 4, a ratchet 7, and a positioning assembly 17. Through the interaction of the gear 5, rack 6, and support base 3, the overall length during use can be adjusted by regulating the distance between the two connecting rods 2. This facilitates disassembly and installation, and adapts to different outer diameter requirements of steel casings. Furthermore, through the interaction of the ratchet 7, push rod 10, first spring 9, and second spring 16, the rotation direction of the gear 5 can be unidirectionally locked, preventing accidental rotation after installation that could cause the connecting rods 2 to detach from the fixing post 1, thus affecting the construction progress.

[0038] Combination Figures 1-4 As shown, the present invention provides a steel casing fixing device for rotary drilling piles in weathered rock strata, comprising:

[0039] Multiple fixed columns 1 are arranged in a rectangular shape, and a connecting rod 2 is detachably installed between two adjacent fixed columns 1. A support seat 3 is slidably connected to the outer surface of the connecting rod 2.

[0040] The throttle 4 is rotatably connected inside the support base 3, and a gear 5 is fixedly connected to one end of the throttle 4 that extends into the support base 3. A rack 6 is meshed on the upper and lower sides of the gear 5, and the rack 6 is fixedly connected to the connecting rod 2.

[0041] Ratchet 7 is fixed on the throttle 4 and is coaxially arranged with gear 5. A pawl 8 is engaged on the outer surface of ratchet 7. The pawl 8 is rotatably connected to the inner wall of the support base 3. A first spring 9 is fixedly connected to the bottom of the pawl 8 and a push rod 10 is connected to the top of the pawl 8.

[0042] Positioning component 17 is threadedly connected to the bottom of support base 3.

[0043] In this embodiment, four fixing posts 1 are arranged in a rectangular shape, and the bottom of each fixing post 1 is cone-shaped to facilitate driving the fixing posts 1 into the ground with the help of external equipment. Hooks are fixedly connected to both sides of each of the four fixing posts 1, and a crossbar (not shown in the figure) is installed on the hook. The crossbar corresponds to the hook, and the two ends of the crossbar are located on the two hooks on the same side. An angle ruler (not shown in the figure) is installed at the center of the crossbar, and a connecting rope (not shown in the figure) is fixed at the center of the angle ruler. A gravity ball (not shown in the figure) is fixed at the bottom of the connecting rope so that the gravity ball is perpendicular to the crossbar and overlaps with the 90-degree scale line on the angle ruler. This makes it easy to ensure that the top surfaces of the four fixing posts 1 are on the same horizontal plane when driving the fixing posts 1 in.

[0044] In this embodiment, the number of connecting rods 2 is eight. Four of the connecting rods 2 have snap-fit ​​blocks 11 fixedly connected to their ends, and four of the connecting rods 2 have limit blocks 12 fixedly connected to their ends. The limit blocks 12 have internal slots 13 that fit the snap-fit ​​blocks 11. Specifically, as shown... Figure 2 As shown, the top of the fixed column 1 is provided with an installation groove 15 that is compatible with the snap-fit ​​block 11 and the limiting block 12. During installation, first, the connecting rod 2 with the limiting block 12 is snapped into the installation groove 15 on one side of the fixed column 1, and then the connecting rod 2 with the snap-fit ​​block 11 is snapped into the installation groove 15 on the other side of the fixed column 1, so that the snap-fit ​​block 11 is snapped into the strip groove 13 of the limiting block 12, thus achieving effective installation and fixing the connecting rod 2 on the fixed column 1.

[0045] In a preferred embodiment, this utility model can be further configured such that: among the eight connecting rods 2, two connecting rods 2 of the same shape are used in a group, and the two connecting rods 2 in the group are slidably connected to the two ends of the support base 3 in a mirror-symmetrical manner, so as to facilitate quick disassembly or installation.

[0046] Regarding the technical solution of this embodiment, a guide strip 14 is fixedly connected to the side of the connecting rod 2, and a guide groove adapted to the guide strip 14 is provided on the inner wall of the support base 3. When the connecting rod 2 slides left and right in the support base 3, the guide strip 14 will slide along the guide groove, which can not only guide the connecting rod 2, but also limit its movement.

[0047] Regarding the technical solution of this embodiment, a second spring 16 is sleeved on the outer surface of the push rod 10. The push rod 10 is slidably connected to the support seat 3. The second spring 16 is mainly used to provide elastic force to the push rod 10, so as to drive it to reset. Pressing the push rod 10 squeezes the pawl 8, which can disengage the pawl 8 from the ratchet 7, thereby unlocking the ratchet 7 from the gear 5, so that the gear 5 can rotate.

[0048] In this embodiment, there are two racks 6, which are symmetrical about the center of the gear 5 and are centrally symmetrically distributed. When the gear 5 is unlocked, the handle 4 is turned to drive the gear 5 to rotate, which can drive the racks 6 on the upper and lower sides to move simultaneously toward the center or simultaneously to the sides. In this way, the connecting rods 2 on both sides can be driven to move in opposite directions within the support base 3. The overall length during use can be adjusted by adjusting the distance between the two connecting rods 2, which is convenient for adapting to steel casings of different diameters.

[0049] Regarding the technical solution of this embodiment, one end of the first spring 9 is fixed to the pawl 8, and the other end is fixed to the inner wall of the support base 3. The first spring 9 is mainly used to provide elastic force to the pawl 8 so that it meshes with the ratchet 7, thereby locking the ratchet 7. At this time, the ratchet 7 can only rotate in one direction, so that the gear 5 can also only rotate in one direction.

[0050] Regarding the technical solution of this embodiment, the positioning component 17 includes a mounting block 171 fixedly connected to the bottom of the support base 3. The mounting block 171 is internally threaded with a threaded rod 172. One end of the threaded rod 172 is equipped with a ball bearing 173. Rotating the threaded rod 172 causes it to rotate on the mounting block 171, which can drive the ball bearing 173 to move, thereby controlling the position of the two relative balls bearing 173 and making them abut against the side wall of the steel casing. When all four balls bearing 173 on the support base 3 abut against the side wall of the steel casing, it can limit and guide the steel casing when it is driven into the sloping terrain, preventing it from tilting or deviating and affecting the construction quality.

[0051] Specifically, in actual use, first determine the outer diameter of the steel casing, then determine and mark the positions of the four fixing posts 1 according to the outer diameter of the steel casing. Then, drive one fixing post 1 into the ground, and then drive another adjacent fixing post 1 partially into the ground. In this way, with the help of a gravity ball and an angle ruler, make the tops of the fixing posts 1 on the same plane. Then, according to the positions of the two adjacent fixing posts 1, first insert the connecting rod 2 with the limit block 12 into the mounting groove 15 of one fixing post 1. Then, turn the handle 4 counterclockwise, which will drive the ratchet 7 and gear 5 to rotate. At this time, the ratchet 7 rotates in one direction, so it will not lock. Then, the gear 5 drives the racks 6 on the upper and lower sides to move to both sides at the same time, thereby driving the connecting rods 2 at both ends of the support base 3 to move to both sides, and insert the limit block 12 at the other end into the mounting groove 15 of the adjacent fixing post 1. This completes the installation on one side. Then, in the same way, insert the connecting rod 2 with the snap-fit ​​block 11 into the mounting groove 15 of the fixing post 1, so that the snap-fit ​​block 11 snaps into the limit block 12. Within the slot 13, effective installation and fixation can be completed. Then, rotate the four threaded rods 172 to make the four threaded rods 172 move the same length. Then, lower the steel casing so that the balls 173 at the ends of the four threaded rods 172 abut against the outer wall of the steel casing. This method can limit and guide the steel casing when it is driven into the sloping terrain, preventing it from tilting or shifting and affecting the construction quality. When it is necessary to disassemble the connecting rod 2, first press down the top rod 10 so that the top rod 10 squeezes the pawl 8, thereby unlocking the ratchet 7 and gear 5. Then, rotate the gear 5 clockwise to drive the racks 6 on both sides to move towards the center at the same time, thereby driving the connecting rods 2 at both ends to retract towards the center at the same time, so that disassembly can be performed quickly. It should be noted that the connecting rod 2 with the snap-fit ​​block 11 should be disassembled first, and then the connecting rod 2 with the limit block 12 should be disassembled. In this way, the overall length during use can be adjusted by adjusting the distance between the two connecting rods 2. This not only facilitates disassembly and installation, but also adapts to the outer diameter requirements of different steel casings.

[0052] The following description, in conjunction with the accompanying drawings and embodiments, provides a further explanation of the steel casing fixing device for rotary drilling piles in weathered rock strata provided by this utility model.

[0053] A steel casing fixing device for rotary drilling piles in weathered rock strata includes:

[0054] Multiple fixed columns 1 are arranged in a rectangular shape, and a connecting rod 2 is detachably installed between two adjacent fixed columns 1. A support seat 3 is slidably connected to the outer surface of the connecting rod 2.

[0055] The throttle 4 is rotatably connected inside the support base 3, and a gear 5 is fixedly connected to one end of the throttle 4 that extends into the support base 3. A rack 6 is meshed on the upper and lower sides of the gear 5, and the rack 6 is fixedly connected to the connecting rod 2.

[0056] Ratchet 7 is fixed on the throttle 4 and is coaxially arranged with gear 5. A pawl 8 is engaged on the outer surface of ratchet 7. The pawl 8 is rotatably connected to the inner wall of the support base 3. A first spring 9 is fixedly connected to the bottom of the pawl 8 and a push rod 10 is connected to the top of the pawl 8.

[0057] Positioning component 17 is threadedly connected to the bottom of support base 3.

[0058] The working principle and usage process of this utility model are as follows: In actual use, first determine the outer diameter of the steel casing, then determine and mark the positions of the four fixing posts 1 according to the outer diameter of the steel casing. Then, drive one fixing post 1 into the ground, and then drive another adjacent fixing post 1 partially into the ground. In this way, with the help of a gravity ball and an angle ruler, make the tops of the fixing posts 1 on the same plane. Then, according to the positions of the two adjacent fixing posts 1, first insert the connecting rod 2 with the limit block 12 into the mounting groove 15 of one fixing post 1. Then, turn the handle 4 counterclockwise, which drives the ratchet 7 and gear 5 to rotate. At this time, the ratchet 7 rotates in one direction, so it will not lock. Then, the gear 5 drives the racks 6 on the upper and lower sides to move to both sides at the same time, thereby driving the connecting rods 2 at both ends of the support base 3 to move to both sides, and insert the limit block 12 at the other end into the mounting groove 15 of the adjacent fixing post 1. The installation on one side is completed. Then, in the same way, insert the connecting rod 2 with the snap-fit ​​block 11 into the mounting groove 15 of the fixing post 1, so that the snap-fit ​​block 11 snaps into the limit block. Effective installation and fixation can be achieved within the slot 13 on block 12. Then, rotate the four threaded rods 172 to make them move the same length. Then, lower the steel casing so that the balls 173 at the ends of the four threaded rods 172 abut against the outer wall of the steel casing. This method can limit and guide the steel casing when it is driven into the sloping terrain, preventing it from tilting or shifting and affecting the construction quality. When the connecting rod 2 needs to be disassembled, first press down the top rod 10 so that the top rod 10 squeezes the pawl 8, thereby unlocking the ratchet 7 and gear 5. Then, rotate the gear 5 clockwise to drive the racks 6 on both sides to move towards the center at the same time, thereby driving the connecting rods 2 at both ends to retract towards the center at the same time, so that disassembly can be performed quickly. It should be noted that the connecting rod 2 with the snap-fit ​​block 11 should be disassembled first, and then the connecting rod 2 with the limit block 12 should be disassembled. In this way, the overall length during use can be adjusted by adjusting the distance between the two connecting rods 2. This not only facilitates disassembly and installation, but also adapts to the outer diameter requirements of different steel casings.

[0059] In this invention, the term "plural" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0061] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fixing device for steel casing of rotary drilling piles in weathered rock strata, characterized in that, include: Multiple fixed columns (1) are arranged in a rectangular shape, and a connecting rod (2) is detachably installed between two adjacent fixed columns (1). A support seat (3) is slidably connected to the outer surface of the connecting rod (2). The throttle (4) is rotatably connected to the support base (3), and a gear (5) is fixedly connected to one end of the throttle (4) that penetrates into the support base (3). A rack (6) is meshed on the upper and lower sides of the gear (5), and the rack (6) is fixedly connected to the connecting rod (2). Ratchet (7), the ratchet (7) is fixed on the throttle (4), and the ratchet (7) and the gear (5) are arranged coaxially. The outer surface of the ratchet (7) is engaged with a pawl (8). The pawl (8) is rotatably connected to the inner wall of the support base (3), and the bottom of the pawl (8) is fixedly connected to a first spring (9). The top of the pawl (8) is connected to a push rod (10). Positioning component (17) is threadedly connected to the bottom of support base (3).

2. The steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 1, characterized in that, The number of fixed columns (1) is four, and the four fixed columns (1) are arranged in a rectangular shape, and the bottom end of each of the four fixed columns (1) is set as a cone shape.

3. The steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 2, characterized in that, The number of connecting rods (2) is eight, of which four connecting rods (2) are fixedly connected to the end of a snap-fit ​​block (11), and four connecting rods (2) are fixedly connected to a limit block (12). The limit block (12) has a strip groove (13) inside that is compatible with the snap-fit ​​block (11).

4. The steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 3, characterized in that, Among the eight connecting rods (2), two connecting rods (2) with the same shape are used as a group, and the two connecting rods (2) in the group are slidably connected to the two ends of the support base (3) in a mirror symmetry.

5. A steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 4, characterized in that, The side of the connecting rod (2) is fixedly connected to a guide strip (14), and the inner wall of the support base (3) is provided with a guide groove that matches the guide strip (14).

6. A steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 5, characterized in that, The top of the fixed column (1) is provided with an installation groove (15) that is compatible with the snap-fit ​​block (11) and the limiting block (12).

7. A steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 5, characterized in that, The outer surface of the push rod (10) is fitted with a second spring (16). The push rod (10) is slidably connected to the support seat (3). Pressing the push rod (10) squeezes the pawl (8), which can disengage the pawl (8) from the ratchet (7).

8. A steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 7, characterized in that, The number of racks (6) is two, and the two racks (6) are symmetrical about the center of the gear (5), and the whole is centrally symmetrically distributed.

9. A steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 8, characterized in that, One end of the first spring (9) is fixed to the pawl (8), and the other end is fixed to the inner wall of the support base (3).

10. A steel casing fixing device for rotary drilling piles in weathered rock strata according to claim 8, characterized in that, The positioning component (17) includes a mounting block (171) fixedly connected to the bottom of the support base (3). The mounting block (171) is internally threaded with a threaded rod (172), and a ball bearing (173) is installed at one end of the threaded rod (172).

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