Method for fast pile forming under complex construction environment

Abstract

The application discloses a method for quickly forming a pile under a complex construction environment and belongs to the technical field of pile forming construction. The method comprises the following specific steps: S1, drilling a hole in a quicksand layer and simultaneously installing a steel casing in the hole to ensure the stability of the hole wall in the quicksand layer; S2, drilling a hole to a rock layer and making the bottom of the steel casing abut against the top of the rock layer; S3, backfilling concrete into the steel casing, the backfilling height being located 1m above the bottom of the steel casing, and drilling a hole in the backfilled concrete after the concrete solidifies to a required strength; and S4, lowering a steel reinforcement cage and pouring concrete into the steel reinforcement cage after the hole is drilled to a designed rock entering depth, so as to finally form a cast-in-place pile. The application has the effect of preventing the soft soil of the quicksand layer from penetrating into the formed hole, thereby ensuring the pile forming quality of the subsequent cast-in-place pile.

Description

Technical Field

[0001] This invention relates to the field of pile driving, and in particular to a method for rapid pile driving in complex construction environments. Background Technology

[0002] Pile construction is a crucial step in pile foundation engineering, and the selection of its construction method requires comprehensive consideration of various factors such as geological conditions, design requirements, and construction environment.

[0003] Drilled piles are a common and rapid pile construction method. They typically involve drilling a hole in the ground using a drilling rig, followed by pouring concrete to form the pile. In complex geological conditions and construction environments, such as when the upper layer is soft quicksand and the lower layer is hard rock, steel casings are usually used within the quicksand layer to prevent hole collapse and improve the reliability of the retaining wall.

[0004] The transition between quicksand and rock layers often involves sloping rock. When the drilling rig drills through the quicksand layer to reach the rock layer, the soft soil of the quicksand layer can easily seep into the hole through the gap between the bottom of the steel casing and the rock layer, causing the hole to collapse and making it impossible to complete the hole smoothly. Summary of the Invention

[0005] In order to prevent the soft soil of the quicksand layer from seeping into the borehole and thus ensure the quality of subsequent cast-in-place piles, this application provides a method for rapid pile formation in complex construction environments.

[0006] This application provides a method for rapid pile generation in complex construction environments, employing the following technical solution:

[0007] A method for rapid pile formation in complex construction environments includes the following steps: S1, drilling into a quicksand layer, with a steel casing installed simultaneously during drilling to ensure the stability of the borehole wall; S2, drilling to the rock layer, ensuring the bottom of the steel casing contacts the top of the rock layer; S3, backfilling the steel casing with concrete to a height 1m above the bottom of the casing, and drilling into the backfilled concrete after it has hardened to the required strength; S4, after drilling to the designed rock penetration depth, lowering the reinforcing cage and pouring concrete to finally form the cast-in-place pile.

[0008] By adopting the above technical solution, the simultaneous installation of steel casing during the pile formation process helps to ensure the stability of the borehole wall during drilling in the quicksand layer. When drilling through the quicksand layer to the rock layer, the backfilled concrete helps to ensure a smooth transition between the quicksand layer and the rock layer during subsequent drilling, thereby improving the quality of the borehole, ensuring the quality of the subsequent pile formation, and enhancing the structural stability of the pile after its formation.

[0009] Optionally, in step S2, when the bottom of the steel casing contacts the top of the rock layer, the sealing component is placed inside the steel casing to seal the gap between the bottom of the steel casing and the top of the rock layer. The sealing component includes a sealing fixing ring and a flexible receiving component. The flexible receiving component is installed on the sealing fixing ring, and the sealing fixing ring has a grouting hole that communicates with the interior of the flexible receiving component.

[0010] By adopting the above technical solution, the sealing device acts as a barrier to the soft soil of the quicksand layer, making it difficult for the soft soil of the quicksand layer to seep into the borehole through the gap between the bottom of the steel casing and the rock layer when drilling through the quicksand layer to reach the rock layer. This helps to further ensure the quality of the pile after the subsequent cast-in-place pile is formed. In addition, after the fixing ring of the sealing device is placed inside the steel casing, grout is injected into the flexible receiving device through the grouting hole. After the grout is formed, the flexible receiving device fits into the gap between the bottom of the steel casing and the top of the rock layer, thus facilitating the sealing of the gap between the bottom of the steel casing and the top of the rock layer. The flexible receiving device is easy to use to seal gaps of different shapes in different geological environments, and has strong applicability.

[0011] Optionally, multiple grouting holes are circumferentially distributed around the axis of the sealing and fixing ring, and the sealing and fixing ring is provided with a sealing stop plate, which is located on the side of the flexible receiving member close to the axis of the sealing and fixing ring.

[0012] By adopting the above technical solution, the setting of multiple grouting holes facilitates the rapid grouting of the interior of the flexible housing, and the setting of the sealing baffle plate plays a limiting role during the grouting of the flexible housing, which facilitates the more stable sealing of the gap between the bottom of the steel casing and the top of the rock layer after the flexible housing is grouted.

[0013] Optionally, multiple blocking baffles are circumferentially distributed around the axis of the blocking fixing ring. Each blocking baffle slides along the axis of the blocking fixing ring and engages with it. The blocking fixing ring is provided with a compression spring that corresponds to each blocking baffle. One end of each compression spring is connected to the blocking fixing ring, and the other end is connected to each blocking baffle.

[0014] By adopting the above technical solution, the setting of multiple sealing baffles facilitates more stable limiting of the position of the flexible accommodating component during grouting. At the same time, the elastic action of each compression spring on each sealing baffle helps to further ensure the stability of the position of each sealing baffle when limiting the flexible accommodating component.

[0015] Optionally, the outer circumferential surface of the sealing and fixing ring is provided with a plurality of fixing blocks circumferentially distributed around its own axis, and the sealing and fixing ring is provided with a sealing drive component that drives each fixing block to move away from its own axis.

[0016] By adopting the above technical solution, after the sealing and fixing ring is placed inside the steel casing, the sealing drive component drives each fixing block to move away from the axis of the sealing and fixing ring. When each fixing block moves away from the axis of the sealing and fixing ring to the state of pressing against the steel casing, the position of the sealing and fixing ring is further limited, which helps to fully ensure the stability of the position of the sealing and fixing ring.

[0017] Optionally, the blocking drive component includes a blocking drive ring, a drive rod fixedly disposed at the bottom of the blocking drive ring corresponding to the fixed block, a drive guide surface disposed at the bottom of the drive rod, the drive rod passing through the blocking fixed ring and slidingly engaging with the blocking fixed ring, and a driven guide surface disposed at the end of the fixed block near the drive rod that fits against the drive guide surface.

[0018] By adopting the above technical solution, after the sealing and fixing ring is placed inside the steel casing, the traction on the sealing and driving ring is released. Under its own gravity, the sealing and driving ring moves towards the sealing and fixing ring, which in turn causes the fixing blocks to move away from the sealing and fixing ring through the cooperation of the driving guide surface and the driven guide surface. When each fixing block presses against the inner wall of the steel casing, it helps to further ensure the stability of the position of the sealing and fixing ring.

[0019] Optionally, the sealing and fixing ring is provided with a sealing spring that drives the sealing driving ring to move toward the sealing and fixing ring.

[0020] By adopting the above technical solution, the setting of the sealing spring is beneficial to increase the pressure of each fixing block against the inner wall of the steel casing by the elastic force of the sealing drive ring, thus ensuring the stability of the position of the sealing fixing ring.

[0021] Optionally, the sealing drive ring is fixedly installed with a sealing connecting rod, the end of the sealing connecting rod is fixedly connected with a locking part, the top of the sealing fixing ring is provided with a locking groove extending along its own axis, the locking part is slidably fitted in the locking groove, the sealing fixing ring is fixedly installed with a locking plate for closing the opening of the locking groove, and the sealing connecting rod passes through and slidably fits in the locking plate.

[0022] By adopting the above technical solution, the cooperation between the locking part and the locking groove further limits the movement of the sealing drive ring, which helps to further ensure the stability of the sealing drive ring when it moves towards the sealing fixed ring. At the same time, the locking plate limits the sealing connecting rod, making it difficult for the sealing connecting rod to come out of the locking groove.

[0023] Optionally, the sealing drive ring has a grouting locking hole corresponding to the grouting hole, and the grouting locking hole is engaged with the grouting pipe.

[0024] By adopting the above technical solution, when grouting is performed inside the flexible accommodating component through the grouting hole, the grouting clamp hole plays a further limiting role in the grouting pipe, which helps to further ensure the stability of the position of the grouting pipe and facilitates the rapid and stable grouting of the flexible accommodating component through the grouting pipe.

[0025] Optionally, in step S1, the steel casing includes multiple casing bodies that are sequentially spliced ​​together. Adjacent casing bodies are welded and fixed together. A connecting block is fixedly connected to one end of one casing body facing the other casing body. A connecting hole corresponding to and engaging with the connecting block is opened at the end of the adjacent casing body facing the connecting block.

[0026] By adopting the above technical solution, multiple spliced ​​casing bodies can easily adapt to quicksand layers of different depths, making them highly adaptable. The welding and fixing setting helps to ensure the structural strength of the casing bodies after connection. The cooperation of the plug-in block and plug-in hole plays a positioning role when connecting adjacent casing bodies, which facilitates the quick and stable connection and fixing of adjacent casing bodies.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When drilling through the quicksand layer to the rock layer, the sealing component acts as a barrier to the soft soil of the quicksand layer, making it difficult for the soft soil of the quicksand layer to seep into the hole through the gap between the bottom of the steel casing and the rock layer, which helps to ensure the quality of subsequent cast-in-place piles.

[0029] 2. The flexible accommodating component after grouting fits into the gap between the bottom of the steel casing and the top of the rock layer, thus facilitating the sealing of the gap between the bottom of the steel casing and the top of the rock layer. The flexible accommodating component is easy to use to seal gaps of different shapes in different geological environments, making it highly adaptable.

[0030] 3. When each fixed block moves away from the axis of the sealing ring to a state of pressing against the steel casing, it further limits the position of the sealing ring, which helps to fully ensure the stability of the sealing ring's position. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0032] Figure 2 This is a schematic diagram of the connection relationship of the casing body in Embodiment 2 of this application.

[0033] Figure 3 This is a schematic diagram of the main structure of the sealing component in Embodiment 2 of this application.

[0034] Figure 4 This is a partial cross-sectional schematic diagram of the sealing component in Embodiment 2 of this application.

[0035] Figure 5 yes Figure 4 A magnified view of part A in the diagram.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Steel casing; 101. Casing body; 2. Connecting block; 3. Connecting hole; 4. Sealing and fixing ring; 5. Flexible receiving component; 6. Grouting hole; 7. Sealing stop plate; 8. Sealing mounting plate; 9. Compression spring; 10. Fixing block; 11. Sealing drive ring; 12. Drive rod; 13. Drive guide surface; 14. Driven guide surface; 15. Sealing spring; 16. Grouting clamping hole; 17. Clamping groove; 18. Clamping plate; 19. Sealing connecting rod; 191. Clamping part; 20. Relief hole. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail. Example

[0039] This application discloses a method for rapid pile formation in complex construction environments. The method includes the following steps: S1, drilling into a quicksand layer, simultaneously installing a steel casing during drilling to ensure borehole wall stability. S2, drilling to the rock layer, ensuring the bottom of the steel casing contacts the top of the rock layer. S3, backfilling concrete into the steel casing to a height 1m above the bottom of the casing; drilling again after the concrete has hardened to the required strength. S4, after drilling to the designed rock penetration depth, lowering a reinforcing cage and pouring concrete to finally complete the cast-in-place pile formation.

[0040] The implementation principle of this application embodiment is that, during the drilling process of cast-in-place piles, the simultaneous installation of steel casing is beneficial to ensuring the stability of the hole wall during the drilling process in the quicksand layer. Subsequently, when drilling through the quicksand layer to the rock layer, the backfilled concrete is beneficial to ensuring a smooth transition between the quicksand layer and the rock layer during the subsequent drilling process, thereby improving the quality of the hole formation, ensuring the quality of the subsequent cast-in-place piles, and enhancing the structural stability of the subsequent cast-in-place piles after completion. Example

[0041] This application discloses a method for rapid pile generation in complex construction environments. (Refer to...) Figure 1The method for rapid pile formation in complex construction environments includes the following specific steps: S1, drilling is performed on the quicksand layer. During the drilling process, the steel casing 1 is installed simultaneously to ensure the stability of the borehole wall in the quicksand layer, making the borehole wall less prone to collapse during the drilling process and ensuring strong construction safety. The drilling operation is mainly carried out by a rotary drilling rig. The steel casing 1 is composed of multiple casing bodies 101 spliced ​​together end to end.

[0042] Reference Figure 1 and Figure 2 Specifically, adjacent two casing bodies 101 are welded and fixed to ensure the structural strength of the two casing bodies 101 after connection. To facilitate the positioning of the two casing bodies 101 when they are connected and to ensure the stability of their position when they are welded and fixed, a connecting block 2 is fixedly connected to the bottom end of one casing body 101 facing the other casing body 101. A connecting hole 3 corresponding to the connecting block 2 is opened at the top end of the other adjacent casing body 101 facing the connecting block 2. The connecting block 2 and the connecting hole 3 are inserted and matched. Multiple insertion blocks and insertion holes are evenly distributed around the axis of the steel casing 1, so as to ensure the stability of the relative position of the two adjacent casing bodies 101 when they are connected through the cooperation of multiple connecting blocks 2 and connecting holes 3.

[0043] S2, when the borehole reaches the rock layer and the bottom of the steel casing 1 touches the top of the rock layer, the sealing element is placed inside the steel casing 1 to seal the gap between the bottom of the steel casing 1 and the top of the rock layer; refer to Figure 3 and Figure 4 Specifically, the sealing component includes a sealing drive component, a sealing fixing ring 4, and a flexible receiving component 5. The sealing drive component, the sealing fixing ring 4, and the flexible receiving component 5 are arranged sequentially from top to bottom in the vertical direction. In this embodiment, the flexible receiving component 5 is made of Oxford cloth to give it good wear resistance and ductility. In this embodiment, the flexible receiving component 5 is fixedly installed at the bottom of the sealing fixing ring 4 by adhesive bonding, so that after the flexible receiving component 5 is grouted and formed, the sealing fixing ring 4 can be pulled out from the top of the flexible receiving component 5 by hoisting, thus realizing the recycling of the sealing fixing ring 4.

[0044] Reference Figure 3The sealing and fixing ring 4 has a grouting hole 6 at its top that penetrates and communicates with the interior of the flexible receiving element 5. Multiple grouting holes 6 are evenly distributed circumferentially around the axis of the sealing and fixing ring 4 to facilitate grouting into the flexible receiving element 5. After the sealing and fixing ring 4 is hoisted into the steel casing 1, grout is injected into the flexible receiving element 5 through pipes passing through the grouting holes 6. The grout-formed flexible receiving element 5 fits into the gap between the bottom of the steel casing 1 and the top of the rock layer, thus facilitating the sealing of the gap and preventing the loose soil of the quicksand layer from spreading.

[0045] Reference Figure 3 and Figure 4 To further ensure the stability of the flexible housing 5 during grouting, the sealing and fixing ring 4 is fitted with a sealing baffle plate 7 that slides along its own axis. Multiple sealing baffle plates 7 are evenly distributed around the axis of the sealing and fixing ring 4. Each sealing baffle plate 7 is located on the side of the flexible housing 5 closest to the axis of the sealing and fixing ring 4, so that each sealing baffle plate 7 can limit the grouting of the flexible housing 5, making it easier for the flexible housing 5 to more stably seal the gap between the bottom of the steel casing 1 and the top of the rock layer after grouting.

[0046] Reference Figure 4 To further ensure the stability of the sealing baffle plate 7 when limiting the flexible accommodating member 5, and to prevent the sealing baffle plate 7 from easily detaching from the sealing fixing ring 4, a sealing mounting plate 8 is fixedly connected to the side of the sealing fixing plate facing the axis of the sealing fixing ring 4. A pressure spring 9 is fixedly installed on the top of the sealing mounting plate 8, and the end of the pressure spring 9 away from the sealing mounting plate 8 is fixedly connected to the bottom of the sealing fixing ring 4. The elastic force of each pressure spring 9 on the sealing mounting plate 8 facilitates the sealing baffle plate 7 to press against the uneven surface of the top of the rock layer, thereby fully and stably limiting the flexible accommodating member 5.

[0047] Reference Figure 3 To further ensure the stability of the sealing ring 4 when it is inside the steel casing 1, multiple fixing blocks 10 are provided on the outer circumferential surface of the sealing ring 4, which are evenly distributed around their own axis. Each fixing block 10 passes through the sealing ring 4 radially and slides to fit the sealing ring 4. The sealing drive is used to drive each fixing block 10 to move away from the axis of the sealing ring 4. When each fixing block 10 abuts against the inner wall of the steel casing 1, it achieves a further limiting effect on the position of the sealing ring 4.

[0048] Continue to refer to Figure 3Specifically, the blocking drive component includes a blocking drive ring 11. The bottom of the blocking drive ring 11 is fixedly provided with drive rods 12 that correspond one-to-one with the fixed blocks 10. Each drive rod 12 passes through the blocking fixed ring 4 and slides in cooperation with the blocking fixed ring 4. Each drive rod 12 has a drive guide surface 13 inclinedly provided at its bottom. Each fixed block 10 has a driven guide surface 14 that fits against the drive guide surface 13 at one end close to each drive rod 12. This allows the blocking drive ring 11 to move towards the blocking fixed ring 4 under its own gravity, while the fixed blocks 10 move away from the blocking fixed ring 4 through the cooperation of the drive guide surface 13 and the driven guide surface 14.

[0049] Reference Figure 3 and Figure 5 The top of the sealing and fixing ring 4 is also provided with multiple sealing springs 15 evenly distributed around its own axis. The sealing springs 15 apply a spring force to the sealing drive ring 11 to move it closer to the sealing and fixing ring 4, so as to further ensure the stability of the position of each fixing block 10 after moving away from the sealing and fixing ring 4. The sealing drive ring 11 has a grouting hole 16 corresponding to the grouting hole 6. The grouting hole 16 is arranged through the axis of the sealing drive ring 11 and is engaged with the grouting pipe, so that the grouting hole 16 plays a further limiting role in the position of the grouting pipe during grouting, which helps to further ensure the stability of the position of the grouting pipe and facilitates the rapid and stable grouting of the interior of the flexible accommodating member 5 through the grouting pipe. The top of the sealing drive ring 11 is also provided with clearance holes 20 that correspond one-to-one with the sealing baffles 7 and pass through them. Each sealing baffle 7 is inserted into and cooperates with each clearance hole 20 to ensure the movement stroke of the sealing baffle 7 when it moves along the axis of the sealing fixing ring 4, thereby improving its applicability.

[0050] Reference Figure 4 and Figure 5 The sealing and fixing ring 4 has a locking groove 17 extending along its own axis at its top. The sealing and fixing ring 4 is fixedly installed with a locking plate 18 for closing the opening of the locking groove 17 by bolts. The sealing and fixing ring 4 has a sealing connecting rod 19 fixedly installed at its bottom. The end of the sealing connecting rod 19 is fixedly connected to a locking part 191. The sealing connecting rod 19 passes through and slides in cooperation with the locking plate 18. The locking part 191 is located in the locking groove 17 and slides in cooperation with the locking groove 17 to further ensure the stability of the sealing and fixing ring 11 when it moves towards the sealing and fixing ring 4. At the same time, it limits the position of the sealing connecting rod 19 so that the sealing connecting rod 19 is not easy to detach from the locking groove 17.

[0051] S3, backfill concrete into the steel casing 1, with the backfill height located 1m above the bottom of the steel casing. After the concrete has solidified to the required strength, drill holes in the backfilled concrete. Furthermore, before backfilling concrete into the steel casing 1, hoist the sealing drive ring 11 and the sealing fixing ring 4 in sequence and remove them from the steel casing 1 to facilitate the recycling of the sealing drive ring 11 and the sealing fixing ring 4.

[0052] S4. After drilling to the designed rock penetration depth, the steel cage is lowered and concrete is poured to finally complete the cast-in-place pile.

[0053] The implementation principle of the method for rapid pile formation in complex construction environments according to this application embodiment is as follows: During the drilling process of cast-in-place piles, the simultaneous installation of the steel casing 1 helps to ensure the stability of the borehole wall during drilling in quicksand layers, making the borehole wall less prone to collapse during drilling. Subsequently, when drilling through the quicksand layer to the rock layer, the sealing fixing ring 4 and the sealing drive ring 11 of the sealing component are hoisted into the steel casing 1. When the sealing stop plate 7 at the bottom of the sealing fixing ring 4 presses against the top of the rock layer, the hoisting and fixing of the sealing drive ring 11 is released, thereby causing each fixing block 10 to move away from the axis of the sealing fixing ring 4. When each fixing block 10 presses against the inner wall of the steel casing 1, the position of the sealing fixing ring 4 is fixed.

[0054] Subsequently, grout is injected into the flexible receiving component 5 through pipes inserted into the grouting holes 16 and 6. After grouting, the flexible receiving component 5 fits into the gap between the bottom of the steel casing 1 and the top of the rock layer, thus blocking the soft soil of the quicksand layer. This prevents the soft soil from seeping into the borehole through the gap between the bottom of the steel casing 1 and the rock layer, which helps ensure the quality of subsequent cast-in-place piles. Furthermore, after the sealing component blocks the gap between the bottom of the steel casing 1 and the rock layer, backfilling with concrete helps ensure a smooth transition between the quicksand layer and the rock layer inside the steel casing 1 during subsequent drilling, thereby improving the borehole quality and enhancing the structural stability of the subsequently cast-in-place piles.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for rapid pile formation under complex construction environments, characterized in that: The specific steps include the following: S1, drilling into the quicksand layer, and simultaneously installing the steel casing (1) during the drilling process to ensure the stability of the borehole wall in the quicksand layer; S2, drilling the hole to the rock layer, so that the bottom of the steel casing (1) contacts the top of the rock layer; S3, backfilling concrete into the steel casing (1), with the backfill height located 1m above the bottom of the steel casing, and drilling into the backfilled concrete after the concrete has solidified to the required strength; S4, after drilling to the designed rock penetration depth, lowering the steel cage and pouring concrete to finally achieve the pile formation of the cast-in-place pile; In step S2, when the bottom of the steel casing (1) contacts the top of the rock layer, the sealing component is placed inside the steel casing (1) to seal the gap between the bottom of the steel casing (1) and the top of the rock layer. The sealing component includes a sealing fixing ring (4) and a flexible receiving component (5). The flexible receiving component (5) is installed on the sealing fixing ring (4). The sealing fixing ring (4) has a grouting hole (6) that communicates with the inside of the flexible receiving component (5). The grouting holes (6) are distributed circumferentially around the axis of the sealing and fixing ring (4). The sealing and fixing ring (4) is provided with a sealing baffle plate (7). The sealing baffle plate (7) is located on the side of the flexible accommodating member (5) close to the axis of the sealing and fixing ring (4). The blocking baffles (7) are distributed circumferentially around the axis of the blocking fixing ring (4). Each blocking baffle (7) slides along the axis of the blocking fixing ring (4) and is fitted to the blocking fixing ring (4). The blocking fixing ring (4) is provided with a pressure spring (9) corresponding to the blocking baffles (7). One end of each pressure spring (9) is connected to the blocking fixing ring (4), and the other end is connected to each blocking baffle (7). The sealing and fixing ring (4) has a plurality of fixing blocks (10) arranged circumferentially around its own axis on its outer peripheral surface, and the sealing and fixing ring (4) is provided with a sealing drive component that drives each fixing block (10) to move away from its own axis. The blocking drive component includes a blocking drive ring (11), and a drive rod (12) is fixedly provided at the bottom of the blocking drive ring (11) and is correspondingly provided with the fixed block (10). The bottom of the drive rod (12) is provided with a drive guide surface (13). The drive rod (12) passes through the blocking fixed ring (4) and slides with the blocking fixed ring (4). The fixed block (10) is provided with a driven guide surface (14) that fits against the drive guide surface (13) at one end near the drive rod (12). The sealing and fixing ring (4) is provided with a sealing spring (15) that drives the sealing driving ring (11) to move toward the sealing and fixing ring (4); The sealing drive ring (11) is fixedly installed with a sealing connecting rod (19), and the end of the sealing connecting rod (19) is fixedly connected with a locking part (191). The top of the sealing fixing ring (4) is provided with a locking groove (17) extending along its own axis. The locking part (191) slides and fits in the locking groove (17). The sealing fixing ring (4) is fixedly installed with a locking plate (18) for closing the opening of the locking groove (17). The sealing connecting rod (19) passes through and slides and fits in the locking plate (18).

2. The method for rapid pile formation in complex construction environments according to claim 1, characterized in that: The sealing drive ring (11) has a grouting hole (16) corresponding to the grouting hole (6), and the grouting hole (16) is engaged with the grouting pipe.

3. The method for rapid pile formation in complex construction environments according to claim 1, characterized in that: In step S1, the steel casing (1) includes multiple casing bodies (101) that are spliced ​​together in sequence. Adjacent casing bodies (101) are welded and fixed. A connecting block (2) is fixedly connected to one end of one casing body (101) facing the other casing body (101). A connecting hole (3) corresponding to the connecting block (2) and inserted into the connecting block (2) is opened at the end of the adjacent casing body (101) facing the connecting block (2).

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