Rectangular anti-slide pile rotary excavating rapid pile-forming construction method

Abstract

The invention relates to the field of rectangular anti-slide piles, and discloses a rectangular anti-slide pile rotary excavating rapid pile forming construction method which comprises the following steps: step 1, preparing a rotary excavating machine, and excavating a circular side hole tangent to two adjacent sides of a pile foundation in each of four corners of the pile foundation by the rotary excavating machine; secondly, a large round hole is excavated in the pile foundation through the rotary drilling machine, and the large round hole is at least tangent to the three edges of the pile foundation; thirdly, the hole wall of the pile foundation is trimmed till a square hole is formed; and a square pile hole cleaning device is prepared and comprises two slag clamping plates, a driving piece is arranged between the two slag clamping plates, and the driving piece is used for driving the two slag clamping plates to scrape drilling slag at the bottom of the hole to the center of the bottom of the hole, so that hole cleaning is facilitated. Therefore, the hole cleaning process is optimized, and the pile foundation quality is improved.

Description

Technical Field

[0001] The present invention relates to the field of rectangular anti-slide piles, and particularly to a construction method for quickly forming piles by rotary drilling of rectangular anti-slide piles. Background Art

[0002] In engineering fields such as slope support and subgrade reinforcement, rectangular anti-slide piles are widely used in landslide treatment under complex geological conditions due to their advantages of strong lateral displacement resistance and high structural stability. However, the traditional construction of rectangular anti-slide piles mainly relies on the manual digging process, which has the following significant defects: First, the construction period is long and the labor intensity is high, especially inefficient in deep piles or hard rock formations; Second, the operation in the hole faces safety hazards such as hole collapse, poisoning by harmful gases, and falling objects from height, with prominent occupational health risks; Third, the construction of the retaining wall requires a large amount of steel bars and concrete, resulting in high material costs.

[0003] To improve the construction efficiency, rotary drilling rigs have gradually been introduced into the pile foundation construction field. However, the conventional rotary drilling process is mainly designed for circular pile holes and has obvious limitations in the construction of rectangular anti-slide piles: For example, it is difficult to trim the rectangular hole wall, and hole shape deviation is likely to occur; the sediment at the bottom of the hole cannot be cleaned thoroughly, affecting the bearing capacity of the pile foundation; the existing hole cleaning tools have poor adaptability and are difficult to efficiently handle the residual drill cuttings at the bottom of the rectangular hole.

[0004] In the existing rotary drilling process, the hole cleaning after the formation of the rectangular pile mostly relies on manual labor or round hole cleaners, resulting in incomplete slag cleaning and low efficiency. Therefore, there is an urgent need for a mechanized construction process that is efficient, safe, and suitable for rectangular anti-slide piles to optimize the hole cleaning process and improve the quality of the pile foundation. Summary of the Invention

[0005] The present invention aims to provide a construction method for quickly forming piles by rotary drilling of rectangular anti-slide piles, optimize the hole cleaning process, and improve the quality of the pile foundation.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A construction method for quickly forming piles by rotary drilling of rectangular anti-slide piles, comprising the following steps:

[0007] Step 1: Prepare a rotary drilling rig, and the rotary drilling rig respectively excavates a circular side hole tangent to two adjacent sides of the pile foundation at the four corners of the pile foundation;

[0008] Step 2: The rotary drilling rig excavates a large circular hole in the pile foundation, and the large circular hole is tangent to at least three sides of the pile foundation;

[0009] Step 3: Trim the hole wall of the pile foundation until a square hole is formed;

[0010] Prepare a square pile hole cleaner, which includes two slag clamping plates, and a driving member is arranged between the two slag clamping plates. The driving member is used to drive the two slag clamping plates to scrape the drill cuttings at the bottom of the hole to the center of the hole bottom for facilitating hole cleaning.

[0011] The beneficial effects of this solution are as follows:

[0012] 1. First, a small-diameter drill bit is used for precise positioning to reduce the initial hole-drilling resistance in hard rock geology, avoid the low efficiency problem caused by direct construction with a large drill bit, reduce drill bit wear, and extend the service life of the equipment.

[0013] 2. The design of "the large round hole is tangent to at least three sides" in step two maximally covers the pile foundation area and significantly reduces the under-excavated part required for subsequent edge trimming. Compared with the traditional full-section hole-trimming process, this method reduces the hole-trimming area by about 40%-50%, thereby reducing the working load and vibration amplitude of the hole-trimming equipment and improving the durability of the equipment.

[0014] 3. In step three, "trimming the hole wall to form a square hole" forms a regular contour through step-by-step hole drilling and combines with a square drill bit for precise edge trimming, effectively avoiding hole wall deviation, ensuring that the geometric dimensions of the rectangular pile hole are consistent with the design (such as the verticality error ≤ 0.5%), and improving the bearing capacity and structural stability of the pile foundation.

[0015] 4. The scattered drill cuttings are concentrated in the central area at the bottom of the hole, and then quickly removed in cooperation with a circular hole-cleaning drill bit. This technology solves the problem of incomplete drill cuttings cleaning in traditional rectangular holes. The sediment thickness can be controlled within ≤ 50mm (the industry standard is ≤ 100mm), the end bearing capacity of the pile foundation is significantly improved, and the hole-cleaning time is reduced by about 40%.

[0016] 5. The above steps work together to reduce manual intervention and the frequency of equipment maintenance, shorten the construction period by about 30%, reduce material waste (such as the amount of retaining wall concrete used is reduced by 15%-20%), and significantly reduce the overall construction cost.

[0017] Furthermore, the rotary drilling rig includes a drill pipe and a circular pile hole-cleaning drill. A vertical movable connecting rod is vertically arranged inside the drill pipe, the driving part is a vertical air cylinder, and the lower end of the output shaft of the vertical air cylinder is connected to the vertical movable connecting rod; the vertical movable connecting rod is used to push the upper ends of two slag clamping plates downward, so that the lower ends of the two slag clamping plates are opened; when the vertical movable connecting rod moves upward, the two slag clamping plates are closed under the action of their own weight, so as to scrape the drill cuttings at the bottom of the hole to the center of the bottom of the hole;

[0018] In step three, first use a square pile hole-cleaning device to scrape the drill cuttings at the bottom of the hole to the center of the bottom of the hole, and then use a circular pile hole-cleaning drill to transfer the drill cuttings at the bottom of the hole out.

[0019] Furthermore, in step three, a square drill bit is used to trim the hole wall of the pile foundation, and then a circular drill bit is replaced to remove the soil slag dropped at the bottom of the hole, and the operation is repeated until the hole wall is flat.

[0020] Furthermore, the rotary drilling machine includes a drill rod and a round pile hole cleaning drill, and the square pile hole cleaning device includes a bracket, the drill rod passes through the bracket, the drill rod and the bracket are connected by vertical sliding and horizontal rotation, the bracket is respectively hinged to two slag clamping plates, and the driving member is a horizontal movable connecting rod, and the two ends of the horizontal movable connecting rod are respectively hinged to the upper ends of the two slag clamping plates;

[0021] The lower end of the drill rod passes through the bracket and is connected to the round pile hole cleaning drill, and the round pile hole cleaning drill is arranged between the two slag inclusion plates;

[0022] Step three includes the following steps:

[0023] 3.1. Use a square drill bit to trim the hole wall of the pile foundation;

[0024] 3.2. The square drill bit of the rotary drilling machine is replaced with a square pile hole cleaner. The horizontal movable connecting rod is shortened to open the lower ends of the two slag plates. The limit plate is supported on the round pile hole cleaner. The bottom of the round pile hole cleaner is higher than the bottom of the slag plate. The rotary drilling machine drives the bracket and the drill rod to move down to the bottom of the hole, and the lower end of the slag plate is against the bottom of the hole.

[0025] 3.3. The horizontal movable connecting rod is extended to make the lower ends of the two slag clamps scrape the drilling slag at the bottom of the hole to the center of the bottom of the hole;

[0026] 3.4. The circular pile hole cleaning drill has a chamber inside and a bucket door connected to the chamber at the bottom. The drill rod drives the circular pile hole cleaning drill to rotate and move downward, and the drill residue at the bottom of the hole enters the circular hole cleaning device through the bucket door;

[0027] 3.5. The rotary drilling rig drives the support and drill rod to move out of the hole.

[0028] Further, in step 3.2, the bracket includes a limit plate, the limit plate is supported on the round pile hole drilling, and a limit hole is provided on the limit plate; the drill rod passes through the limit plate, and a limit piece is provided on the drill rod, the limit piece is located above the limit plate, the limit hole and the limit piece are circumferentially misaligned, and the limit piece can pass through the limit hole after rotation;

[0029] After the lower end of the slag plate abuts against the bottom of the hole, the drill rod drives the round pile hole drilling drill to continue to move downward, and the limiter abuts against the limiter plate and drives the bracket and the slag plate to press down together;

[0030] In step 3.4, the drill rod is rotated, and the drill rod drives the limit piece to rotate until it is aligned with the limit hole. The drill rod drives the limit piece to pass through the limit hole and drives the round pile hole cleaning drill to move down to the bottom of the hole, thereby completing the hole cleaning.

[0031] Furthermore, in step 1, slag samples were retained every 2 m in the first side hole excavated to compare the geological conditions.

[0032] Furthermore, in step one, construction preparation and measurement and layout are performed, the four corner points of the rectangular pile are calibrated and the casing is installed; the earth around the casing is backfilled and compacted, the four corners of the upper end of the casing are kept horizontal, and the center deviation of the casing is ≤50mm.

[0033] This solution also has the following effects:

[0034] 1. With the cooperation of the side hole and the large circular hole, the drill slag of the side hole and the large circular hole has been cleared out during the drilling process; the square pile only has the edge of the hole wall that needs to be trimmed and slag removed. Therefore, the hole slag in step 3 is mainly scattered near the hole wall, and it is difficult to directly use the traditional round pile hole cleaning drill for cleaning (the traditional round pile hole cleaning drill has a chamber inside and a bucket door connected to the chamber at the bottom. The drill rod drives the round pile hole cleaning drill to rotate and move downward, and the drill slag at the bottom of the hole enters the inside of the round hole cleaner through the bucket door);

[0035] Therefore, this scheme uses a square pile hole cleaner in combination with other hole cleaning methods. First, the drill cuttings at the bottom of the hole are scraped to the center of the bottom of the hole, and then the hole is cleaned centrally. Other hole cleaning methods can be: round pile hole cleaning drill or manual hole cleaning.

[0036] 2. Usually, a square pile hole cleaner and a round pile hole drill are used to clean the hole. However, it is very troublesome to replace different rotating heads, which greatly reduces the construction progress.

[0037] In this solution, the square pile hole cleaner and the round pile hole drill are designed in an integrated manner. There is no need to replace the drill bit back and forth. The square pile hole cleaner and the round pile hole drill can be switched directly by sliding and rotating the horizontal movable connecting rod and the drill rod in the bracket, thereby improving the hole cleaning efficiency and reducing the wear of components caused by replacing the drill bit.

[0038] 3. Every 2m of the first hole, retain slag samples for geological comparison in order to dynamically adjust the pile length and embedment depth, monitor stratum changes in real time, and reduce the risk of construction accidents caused by geological differences.

[0039] 4. Backfill and compact the casing to ensure the stability of the top of the pile hole and prevent hole collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a flow chart of Example 1;

[0041] Figure 2 A top view of the square pile in step 1 of Example 1;

[0042] Figure 3 A top view of the square pile after the first large circular hole is excavated in Example 1;

[0043] Figure 4 A top view of the square pile after the second large circular hole is excavated in Example 1;

[0044] Figure 5 A schematic top view of the trimming range in step 3 of Example 1;

[0045] Figure 6Front view of the square pile hole cleaner in Example 1 when it is opened;

[0046] Figure 7 Front view of the square pile hole cleaner in Example 1 when it is closed;

[0047] Figure 8 Top view schematic diagram of the square pile hole cleaner in Example 1;

[0048] Figure 9 3D axonometric drawing of the square pile hole cleaner in Example 2;

[0049] Figure 10 Top view of the square pile hole cleaner in Example 2;

[0050] Figure 11 Front view of the square pile hole cleaner in Example 2. Detailed implementation manners

[0051] The following is a further detailed description through specific implementation manners:

[0052] The reference numerals in the accompanying drawings of the specification include: rectangular pile 1, side hole 21, large round hole 22, connecting plate 31, connecting shaft 32, driving blade 33, slag clamping plate 34, slag scraping plate 35, horizontal movable rod 36, drill rod 4, limiting member 41, drill slag 5, limiting plate 6, limiting hole 61, round pile hole cleaner 7.

[0053] Example 1

[0054] Example 1 is basically as Figures 1-8 shown: The construction method for quickly forming a pile by rotary drilling of a rectangular anti-sliding pile, the flow chart is as Figure 1 shown, and it includes the following steps:

[0055] Step 1, construction preparation and measurement layout. Prepare a rotary drilling rig. When the rotary drilling rig is in place, lay steel plates or carry out rockfill replacement at the pile position to ensure that the drilling rig does not sink during operation and check whether there are obstacles affecting the rotation within the slewing radius. To ensure the verticality of the pile hole after drilling, adjust the verticality of the drill rod 4 of the drilling rig according to the spirit level carried by the drilling rig;

[0056] The rotary drilling rig includes a drill rod 4 and several drill bits. The drill rod 4 part of the rotary drilling rig is the same as the prior art, and the drill bit is driven up and down by a winch and a steel wire rope, and the drill rod 4 is rotated by a power head. The power head and the drill rod 4 are vertically slidably connected; several drill bits include a round-tooth sand-grabbing drill bit with d = 800 mm, a round-tooth sand-grabbing drill bit with d = 1800 mm, a square drill, a square pile hole cleaner, and a round pile hole cleaner 7; among them, the round-tooth sand-grabbing drill bit and the round pile hole cleaner 7 are the same as the drill bits and hole cleaners in the prior art;

[0057] In this embodiment, the pile cross-sectional dimension is 1800mm×3200mm; for the rectangular anti-slide pile, dry-hole drilling is carried out using a rotary drilling rig. As Figure 2 shown, first, a round-tooth sand-bailing bit with d = 800mm is used to drill side holes 21 at the four corners of the pile foundation. Each side hole 21 is tangent to two adjacent sides of the pile foundation. Mark the four corner points of the rectangular pile 1 and install the casing; backfill and compact the soil around the casing, keep the four corners of the upper mouth of the casing horizontal, and the center deviation of the casing ≤ 50mm; when drilling the first side hole 21, retain the slag samples every two meters, compare the actual geological conditions with the geological exploration data, and contact the design unit if there are differences to ensure the verticality of the pile foundation hole;

[0058] Step 2: After the side holes 21 are completed, use a round-tooth sand-bailing bit with d = 1800mm to drill large round holes 22 until reaching the designed bottom elevation of the hole, as Figure 3 、 Figure 4 shown. The large round holes 22 are tangent to at least three sides of the pile foundation. In this embodiment, two large round holes 22 are excavated; fill in the drilling construction records in a timely manner during drilling, and explain the drilling situation and precautions for the next shift during handover. When stopping drilling due to reasons, cover the hole opening, and it is strictly prohibited to leave the drill bit in the hole to prevent burying the drill;

[0059] Step 3: Use the square drill of the rotary drilling rig to mill the hole wall of the pile foundation, that is, trim the edge of the pile foundation hole. The trimmed part is as Figure 5 shown until the square hole is formed. Using the square drill to mill the hole is an existing technology and will not be elaborated here;

[0060] During the hole milling process, when hole cleaning is required, replace the drill bit with a square-pile hole cleaner. The square-pile hole cleaner includes a connecting plate 31, a driving member, and two slag clamping plates 34. The drill rod 4 passes through the connecting plate 31 and is threadedly connected to the connecting plate 31. Both sides of the connecting plate 31 are hinged to the slag clamping plates 34. Specifically, a rotating shaft is welded respectively, as Figure 6 、 Figure 7 shown. The rotating shafts pass through the upper ends of the slag clamping plates 34 and are rotatably connected to the slag clamping plates 34. The driving member is connected to the bottom of the drill rod 4 through a pin shaft. The specific connection method is the same as that of the drill bit; the driving member is arranged between the two slag clamping plates 34. The top view of the driving member is as Figure 8 shown. The driving member includes an integrally formed connecting shaft 32 and two driving blades 33. The connecting shaft 32 is used for detachably connecting to the bottom of the drill rod 4. In this embodiment, the detachable connection method is through a pin connection; in the initial state, the ends of the driving blades 33 abut against the inner sides of the slag clamping plates 34, causing the lower parts of the two slag clamping plates 34 to open; after the square-pile hole cleaner enters the bottom of the hole, the drill rod 4 drives the driving blades 33 to rotate in the direction as Figure 8 shown, while the slag clamping plates 34 cannot rotate together under the limiting effect of the rectangular hole wall, so that the driving blades 33 rotate relative to the slag clamping plates 34, and then the driving blades 33 gradually move away from the slag clamping plates 34, causing the two slag clamping plates 34 to close inward under their own weight, asFigure 7 As shown, the drill cuttings 5 at the bottom of the hole are scraped to the center of the bottom of the hole, forming a slag-entrapping space in an inverted triangle shape.

[0061] Step Four: Use a crane to lift the steel reinforcement cage into the hole and install and fix it. The steel reinforcement cage segments are welded and lowered at the hole opening, and then concrete is poured using the conduit method.

[0062] Embodiment 2

[0063] The difference between Embodiment 2 and Embodiment 1 is that the square pile hole cleaner and the round pile hole cleaner 7 adopt an integrated design. Specifically:

[0064] As Figures 9-11 shown, the rotary drilling rig includes a drill pipe 4 and a round pile hole cleaner 7. The square pile hole cleaner includes a bracket, a driving member, and two slag-entrapping plates 34. In this embodiment, the bracket is a limiting plate 6. The limiting plate 6 is provided with a drilling hole, and limiting holes 61 communicating with the drilling hole are opened on both sides before and after the drilling hole. The lower end of the drill pipe 4 passes through the drilling hole of the limiting plate 6 and is connected to the round pile hole cleaner 7. The round pile hole cleaner 7 is arranged between the two slag-entrapping plates 34. The drilling hole is vertically slidably and horizontally rotatably connected to the bracket. Both sides of the limiting plate 6 are respectively hinged to the two slag-entrapping plates 34. The driving member is two horizontal movable connecting rods. The horizontal movable connecting rods are hydraulic telescopic rods. Both ends of the horizontal movable connecting rods are respectively hinged to the upper ends of the two slag-entrapping plates 34. The hinging methods in this embodiment are the same as those of the connecting plate 31 and the slag-entrapping plate 34 in Embodiment 1; Scraping plates 35 are integrally formed at the lower ends of the slag-entrapping plates 34. When the two scraping plates 35 are opened, the scraping plates 35 are vertically arranged, and the thickness of the lower ends of the scraping plates 35 gradually decreases to facilitate insertion into the bottom of the hole.

[0065] As Figure 11 shown, a limiting member 41 is welded on each of the left and right sides of the drill pipe 4. As Figure 10 shown, the limiting member 41 is a strip-shaped component, and after rotation, the limiting member 41 can pass through the limiting hole 61;

[0066] Step Three includes the following steps:

[0067] 3.1. Use a square drill bit to trim the hole wall of the pile foundation;

[0068] 3.2. Replace the square drill bit of the rotary drilling rig with the square pile hole cleaner, shorten the horizontal movable connecting rods, so that the lower ends of the two slag-entrapping plates 34 are opened. The limiting plate 6 supports on the round pile hole cleaner 7. The bottom of the round pile hole cleaner 7 is higher than the bottom of the slag-entrapping plates 34. The limiting member 41 is located above the limiting plate 6. As Figure 10 shown, the limiting hole 61 and the limiting member 41 are circumferentially misaligned. The rotary drilling rig drives the bracket and the drill pipe 4 to move down to the bottom of the hole, and the lower ends of the slag-entrapping plates 34 abut against the bottom of the hole;

[0069] 3.3. Extend the horizontal movable connecting rods, so that the lower ends of the two slag-entrapping plates 34 scrape the drill cuttings 5 at the bottom of the hole to the center of the bottom of the hole;

[0070] 3.4. Rotate the drill rod 4, the drill rod 4 drives the limiter 41 to rotate until it is aligned with the limiter hole 61, the drill rod 4 drives the limiter 41 to pass through the limiter hole 61 and drives the round pile hole cleaning drill 7 to move down to the bottom of the hole, the round pile hole cleaning drill 7 is provided with a chamber inside and a bucket door connected to the chamber at the bottom, the drill rod 4 drives the round pile hole cleaning drill 7 to rotate and move downward, and the drill residue 5 at the bottom of the hole enters the inside of the circular hole cleaner through the bucket door;

[0071] 3.5. The rotary drilling rig drives the support and the drill rod 4 to move up outside the hole.

[0072] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for rapid pile construction by rotary drilling of rectangular anti-slip piles, characterized in that: The following steps are involved: Step 1: Prepare a rotary drilling machine, which digs a circular side hole tangent to two adjacent sides of the pile foundation at each of the four corners of the pile foundation; Step 2: The rotary drilling machine digs a large circular hole in the pile foundation, and the large circular hole is tangent to at least three sides of the pile foundation; Step 3: Trim the hole wall of the pile foundation until the square hole is formed; Prepare a square pile hole cleaner, which includes two slag plates. A driving member is provided between the two slag plates. The driving member is used to drive the two slag plates to scrape the drilling slag at the bottom of the hole to the center of the bottom of the hole to facilitate hole cleaning.

2. The method for rapid pile construction of rectangular anti-slip piles according to claim 1 is characterized by: The rotary drilling rig includes a drill rod and a round pile hole cleaning drill. A vertical movable connecting rod is vertically arranged in the drill rod. The driving member is a vertical cylinder. The lower end of the vertical cylinder output shaft is connected to the vertical movable connecting rod. The vertical movable connecting rod is used to push the upper ends of the two slag clamping plates downward, so that the lower ends of the two slag clamping plates are opened. When the vertical movable connecting rod moves upward, the two slag clamping plates are closed under the action of their own weight, so that the drill slag at the bottom of the hole is scraped to the center of the bottom of the hole. In step three, first use a square pile hole cleaner to scrape the drill cuttings at the bottom of the hole to the center of the bottom of the hole, and then use a round pile hole cleaner to rotate the drill cuttings out of the bottom of the hole.

3. The method for rapid pile construction of rectangular anti-slide piles according to claim 1 is characterized by: In step three, a square drill bit is used to trim the hole wall of the pile foundation, and then a round drill bit is replaced to remove the soil debris that has fallen from the bottom of the hole. The operation is repeated until the hole wall is flat.

4. The method for rapid pile construction of rectangular anti-slide piles according to claim 1 is characterized by: The rotary drilling rig includes a drill rod and a round pile hole cleaning drill, and the square pile hole cleaning device includes a bracket, the drill rod passes through the bracket, the drill rod and the bracket are connected by vertical sliding and horizontal rotation, the bracket is respectively hinged to two slag clamping plates, and the driving member is a horizontal movable connecting rod, and the two ends of the horizontal movable connecting rod are respectively hinged to the upper ends of the two slag clamping plates; The lower end of the drill rod passes through the bracket and is connected to the round pile hole cleaning drill, and the round pile hole cleaning drill is arranged between the two slag inclusion plates; Step three includes the following steps: 3.

1. Use a square drill bit to trim the hole wall of the pile foundation; 3.

2. The square drill bit of the rotary drilling machine is replaced with a square pile hole cleaner. The horizontal movable connecting rod is shortened to open the lower ends of the two slag plates. The limit plate is supported on the round pile hole cleaner. The bottom of the round pile hole cleaner is higher than the bottom of the slag plate. The rotary drilling machine drives the bracket and the drill rod to move down to the bottom of the hole, and the lower end of the slag plate is against the bottom of the hole. 3.

3. The horizontal movable connecting rod is extended to make the lower ends of the two slag clamps scrape the drilling slag at the bottom of the hole to the center of the bottom of the hole; 3.

4. The circular pile hole cleaning drill has a chamber inside and a bucket door connected to the chamber at the bottom. The drill rod drives the circular pile hole cleaning drill to rotate and move downward, and the drill residue at the bottom of the hole enters the circular hole cleaning device through the bucket door; 3.

5. The rotary drilling rig drives the support and drill rod to move out of the hole.

5. The method for rapid pile construction of rectangular anti-slide piles according to claim 4 is characterized by: In step 3.2, the bracket includes a limit plate, the limit plate is supported on the round pile hole drilling, and a limit hole is provided on the limit plate; the drill rod passes through the limit plate, and a limit piece is provided on the drill rod, the limit piece is located above the limit plate, the limit hole and the limit piece are circumferentially misaligned, and the limit piece can pass through the limit hole after rotation; After the lower end of the slag plate abuts against the bottom of the hole, the drill rod drives the round pile hole drilling drill to continue to move downward, and the limiter abuts against the limiter plate and drives the bracket and the slag plate to press down together; In step 3.4, the drill rod is rotated, and the drill rod drives the limit piece to rotate until it is aligned with the limit hole. The drill rod drives the limit piece to pass through the limit hole and drives the round pile hole cleaning drill to move down to the bottom of the hole, thereby completing the hole cleaning.

6. The method for rapid pile construction of rectangular anti-slide piles according to claim 1 is characterized by: In step 1, slag samples were retained every 2 m in the first side hole excavated to compare the geological conditions.

7. The method for rapid pile construction of rectangular anti-slide piles according to claim 1 is characterized by: In step one, construction preparation and measurement and layout are carried out, the four corners of the rectangular pile are calibrated and the casing is installed; the earth around the casing is backfilled and compacted, the four corners of the upper end of the casing are kept level, and the center deviation of the casing is ≤50mm.

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