Method for rapidly forming pile in complex construction environment

Abstract

The invention discloses a method for quickly forming a pile in a complex construction environment, which belongs to the technical field of pile forming construction, and comprises the following specific steps: S1, drilling a quicksand layer, and synchronously mounting a steel casing in the drilling process of the quicksand layer so as to ensure the stability of a hole wall in the drilling process of the quicksand layer; s2, the hole site is drilled to the rock layer, and the bottom of the steel casing abuts against the top of the rock layer; s3, concrete backfilling is conducted in the steel casing, the backfilling height is located at the position 1 m above the bottom of the steel casing, and after the concrete is solidified to the required strength, drilling is conducted on the backfilled concrete; and S4, after the hole position is drilled to the designed rock entering depth, a reinforcement cage is lowered, concrete is poured, and finally pile forming of the cast-in-place pile is achieved. The construction method has the advantages that soft soil of the quicksand layer is not prone to permeating into the forming hole site, and then the pile forming quality after follow-up cast-in-place pile forming is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of pile construction, and in particular to a method for rapid pile construction in a complex construction environment. Background Art

[0002] Pile construction is a key link in pile foundation engineering. The selection of construction method needs to be comprehensively considered based on geological conditions, design requirements, construction environment and other factors.

[0003] Bored piles are a common method of rapid pile construction, which is usually done by pouring concrete into the ground after drilling holes. Faced with complex geological conditions and construction environments, such as the upper layer being a soft quicksand layer and the lower layer being a hard rock layer, in order to prevent the hole from collapsing after drilling and to improve the reliability of the retaining wall, follow-up construction is usually carried out in the quicksand layer through a steel casing.

[0004] The transition between the quicksand layer and the rock layer usually encounters inclined rock. When the drill rig drills through the quicksand layer to drill into the rock layer, the soft soil of the quicksand layer can easily penetrate into the hole through the gap between the bottom of the steel casing and the rock layer, causing the hole to collapse and thus making it impossible to drill the hole smoothly. Summary of the invention

[0005] In order to prevent the soft soil of the quicksand layer from penetrating into the hole and thereby ensure the quality of subsequent bored piles, the present application provides a method for rapid pile construction in a complex construction environment.

[0006] The present application provides a method for rapid pile construction in a complex construction environment using the following technical solutions: A method for rapid pile formation in a complex construction environment comprises the following specific steps: S1, drilling a quicksand layer, and simultaneously installing a steel casing during the drilling process of the quicksand layer to ensure the stability of the hole wall in the quicksand layer; S2, drilling the hole to a rock layer, and making the bottom of the steel casing contact the top of the rock layer; S3, backfilling concrete into the steel casing, the backfilling height is located at a position 1m above the bottom of the steel casing, and drilling the backfilled concrete after the concrete solidifies to the required strength; S4, after the hole is drilled to the designed rock penetration depth, lowering a steel cage and pouring concrete to finally realize the formation of cast-in-place piles.

[0007] By adopting the above technical scheme, during the process of bored pile construction, the simultaneous installation of steel casing is beneficial to ensuring the stability of the hole wall during the drilling process in the quicksand layer. When drilling through the quicksand layer to the rock layer later, the backfilled concrete is beneficial to ensuring a smooth transition between the quicksand layer and the rock layer during the subsequent drilling process, which is beneficial to improving the hole construction quality, ensuring the quality of subsequent bored pile construction, and enhancing the structural stability of the subsequent bored piles after construction.

[0008] Optionally, in step S2, when the bottom of the steel casing contacts the top of the rock layer, a sealing member is placed in the steel casing to seal the gap between the bottom of the steel casing and the top of the rock layer. The sealing member includes a sealing fixing ring and a flexible receiving member, and the flexible receiving member is installed on the sealing fixing ring. The sealing fixing ring is provided with a grouting hole connected to the interior of the flexible receiving member.

[0009] By adopting the above technical scheme, the setting of the plugging plays a role in blocking the soft soil of the quicksand layer, so that when drilling through the quicksand layer to the rock layer later, the soft soil of the quicksand layer is not easy to penetrate into the hole through the gap between the bottom of the steel casing and the rock layer, which is beneficial to further ensure the quality of the subsequent bored piles after forming. In addition, after the sealing member fixing ring is placed in the steel casing, grouting is performed into the flexible container through the grouting hole. The flexible container formed by grouting fits into the gap between the bottom of the steel casing and the top of the rock layer, thereby facilitating the sealing of the gap between the bottom of the steel casing and the top of the rock layer. The setting of the flexible container facilitates the sealing of gaps of different shapes under different geological environments and has strong applicability.

[0010] Optionally, there are multiple grouting holes distributed circumferentially around the axis of the plugging fixing ring, and the plugging fixing ring is provided with a plugging stop plate, which is located on a side of the flexible accommodating part close to the axis of the plugging fixing ring.

[0011] By adopting the above technical scheme, the provision of multiple grouting holes facilitates the rapid grouting of the interior of the flexible container, and the provision of the blocking plate plays a limiting role during grouting of the flexible container, making it easier to stably seal the gap between the bottom of the steel casing and the top of the rock layer after grouting of the flexible container.

[0012] Optionally, there are multiple blocking shift plates distributed circumferentially around the axis of the blocking fixing ring, each of the blocking shift plates is slidably fitted with the blocking fixing ring along the axis of the blocking fixing ring, and the blocking fixing ring is provided with a pressure spring arranged one-to-one corresponding to the blocking shift plates, and one end of each of the pressure springs is connected to the blocking fixing ring, and the other end is respectively connected to each blocking shift plate.

[0013] By adopting the above-mentioned technical scheme, the provision of multiple blocking and shifting plates facilitates more stable realization of limiting the position of the flexible container during grouting. At the same time, the elastic action of each pressure spring on each blocking and shifting plate is beneficial to further ensure the stability of the position of each blocking and shifting plate when limiting the flexible container.

[0014] Optionally, the outer peripheral surface of the blocking fixing ring is provided with a plurality of fixing blocks circumferentially distributed around its own axis, and the blocking fixing ring is provided with a blocking driving member for driving each fixing block to move in a direction away from its own axis.

[0015] By adopting the above technical solution, when the sealing fixing ring is placed in the steel casing, the sealing driving member drives each fixing block to move in a direction away from the axis of the sealing fixing ring. When each fixing block moves in a direction away from the axis of the sealing fixing ring to a state of being pressed against the steel casing, a further limiting effect on the position of the sealing fixing ring is achieved, which is conducive to fully ensuring the stability of the position of the sealing fixing ring.

[0016] Optionally, the blocking drive member includes a blocking drive ring, a driving rod fixedly arranged at the bottom of the blocking drive ring in one-to-one correspondence with the fixed block, a driving guide surface is arranged at the bottom of the driving rod, the driving rod is passed through the blocking fixed ring and slidingly cooperates with the blocking fixed ring, and the fixed block is provided with a driven guide surface that fits with the driving guide surface near one end of the driving rod.

[0017] By adopting the above technical solution, when the blocking fixing ring is placed in the steel casing, the traction on the blocking driving ring is released, and the blocking driving ring moves towards the blocking fixing ring under the action of its own gravity, so that the fixed block moves towards the direction away from the blocking 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 is helpful to further ensure the stability of the position of the blocking fixing ring.

[0018] Optionally, the blocking fixing ring is provided with a blocking spring for driving the blocking driving ring to move towards a direction approaching the blocking fixing ring.

[0019] By adopting the above technical solution, the setting of the blocking spring is beneficial to increase the pressing force of each fixing block against the inner wall of the steel casing through the elastic force on the blocking drive ring, thereby ensuring the position stability of the blocking fixing ring.

[0020] Optionally, the blocking drive ring is fixedly installed with a blocking connecting rod, the end of the blocking connecting rod is fixedly connected with a locking portion, the top of the blocking fixing ring is provided with a locking groove extending along its own axial direction, the locking portion is slidably engaged in the locking groove, the blocking fixing ring is fixedly installed with a locking plate for closing the notch of the locking groove, the blocking connecting rod is penetrated and slidably engaged with the locking plate.

[0021] By adopting the above technical scheme, the cooperation between the locking portion and the locking groove plays a further limiting role when the blocking drive ring moves, which is beneficial to further ensure the stability of the blocking drive ring when it moves toward the direction close to the blocking fixed ring. At the same time, the setting of the locking plate plays a limiting role on the blocking connecting rod, making it difficult for the blocking connecting rod to fall out of the locking groove.

[0022] Optionally, the plugging drive ring is provided with a grouting clamping hole corresponding to the grouting hole, and the grouting clamping hole is engaged with the grouting pipeline.

[0023] By adopting the above technical solution, when grouting is performed inside the flexible container through the grouting hole, the grouting clamp hole further limits the grouting pipe, which is beneficial to further ensure the stability of the position of the grouting pipe and facilitate the rapid and stable grouting of the inside of the flexible container through the grouting pipe.

[0024] Optionally, in step S1, the steel casing includes a plurality of casing bodies which are spliced ​​in sequence, and two adjacent casing bodies are welded and fixed, wherein one end of one casing body facing the other casing body is fixedly connected with a connecting block, and the other adjacent casing body has a connecting hole corresponding to the connecting block and plug-fitting with the connecting block at one end thereof.

[0025] By adopting the above technical solution, multiple spliced ​​casing bodies can easily adapt to quicksand layers of different depths and have strong applicability. The welding and fixing setting is conducive to ensuring the structural strength of the casing bodies after connection. The cooperation of the plug-in block and the plug-in hole plays a positioning role when connecting two adjacent casing bodies, which is convenient for quickly and stably realizing the connection and fixation between the two adjacent casing bodies.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When drilling through the quicksand layer to the rock layer, the plugging piece blocks the soft soil of the quicksand layer, making it difficult for the soft soil of the quicksand layer to penetrate into the hole through the gap between the bottom of the steel casing and the rock layer, which is beneficial to ensure the quality of the subsequent cast-in-place piles.

[0027] 2. The flexible container after grouting is fitted into the gap between the bottom of the steel casing and the top of the rock layer, so as to facilitate the sealing of the gap between the bottom of the steel casing and the top of the rock layer. The setting of the flexible container facilitates the sealing of gaps of different shapes under different geological environments and has strong applicability.

[0028] 3. When each fixing block moves in the axial direction away from the plugging fixing ring to a state of pressing against the steel casing, a further limiting effect on the position of the plugging fixing ring is achieved, which is conducive to fully ensuring the stability of the position of the plugging fixing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0030] Figure 2 It is a schematic diagram of the connection relationship of the casing body in Example 2 of the present application.

[0031] Figure 3 It is a schematic diagram of the main structure of the blocking component in Example 2 of the present application.

[0032] Figure 4It is a partial cross-sectional schematic diagram of the sealing member in Example 2 of the present application.

[0033] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part A.

[0034] Description of reference numerals: 1. Steel casing; 101. Casing body; 2. Connecting block; 3. Connecting hole; 4. Sealing fixing ring; 5. Flexible accommodation member; 6. Grouting hole; 7. Sealing stop plate; 8. Sealing mounting plate; 9. Compression spring; 10. Fixing block; 11. Sealing driving ring; 12. Driving rod; 13. Driving 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. Clearance hole. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-5 This application is described in further detail. Example

[0036] The embodiment of the present application discloses a method for rapid pile formation in a complex construction environment. The method for rapid pile formation in a complex construction environment includes the following specific steps: S1, drilling a quicksand layer, and installing a steel casing synchronously during the drilling process of the quicksand layer to ensure the stability of the hole wall in the quicksand layer. S2, drilling the hole to the rock layer, and making the bottom of the steel casing contact the top of the rock layer. S3, backfilling concrete into the steel casing, the backfill height is 1m above the bottom of the steel casing, and the backfilled concrete is drilled after the concrete solidifies to the required strength. S4, after the hole is drilled to the designed rock penetration depth, the steel cage is lowered and concrete is poured to finally achieve the formation of cast-in-place piles.

[0037] The implementation principle of the embodiment of the present application is that during the bored pile drilling process, the simultaneous installation of the steel casing is beneficial to ensuring the stability of the hole wall during the drilling process in the quicksand layer. When drilling through the quicksand layer to the rock layer subsequently, the backfilled concrete is beneficial to ensuring a smooth transition between the quicksand layer and the rock layer during the subsequent drilling process, which is beneficial to improving the drilling quality, ensuring the subsequent bored pile quality, and enhancing the structural stability of the subsequent bored piles after drilling. Example

[0038] The present application embodiment discloses a method for rapid pile construction in a complex construction environment. Figure 1The method for rapid pile formation under a complex construction environment includes the following specific steps: S1, drilling a quicksand layer, and simultaneously installing a steel casing 1 during the drilling process of the quicksand layer to ensure the stability of the hole wall in the quicksand layer, so that the hole wall is not easy to collapse during the drilling process, and the construction safety is strong; wherein, the drilling operation is mainly carried out by a rotary drilling rig, and the steel casing 1 is composed of a plurality of casing bodies 101 which are spliced ​​end to end in sequence.

[0039] Reference Figure 1 and Figure 2 Specifically, two adjacent casing bodies 101 are welded and fixed to ensure the structural strength of the two casing bodies 101 after being connected. In order to facilitate the positioning of the positions of the two casing bodies 101 when connected and ensure the stability of the positions of the two adjacent casing bodies 101 when 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, and 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 is plugged into the connecting hole 3, and a plurality of plug-in blocks and plug-in holes are evenly distributed circumferentially around the axis of the steel casing 1, so as to ensure the stability of the relative positions of the two adjacent casing bodies 101 when connected through the cooperation of multiple connecting blocks 2 and connecting holes 3.

[0040] S2, when the hole is drilled to the rock layer and the bottom of the steel casing 1 is in contact with the top of the rock layer, the plugging piece is placed in the steel casing 1 to plug the gap between the bottom of the steel casing 1 and the top of the rock layer; Figure 3 and Figure 4 Specifically, the sealing member includes a sealing drive member, a sealing fixing ring 4 and a flexible accommodating member 5. The sealing drive member, the sealing fixing ring 4 and the flexible accommodating member 5 are arranged in sequence from top to bottom in the vertical direction. In the embodiment of the present application, the material of the flexible accommodating member 5 is selected as Oxford cloth, so that the flexible accommodating member 5 has good wear resistance and ductility. In the embodiment of the present application, the flexible accommodating member 5 is fixedly installed at the bottom of the sealing fixing ring 4 by bonding, so that the sealing fixing ring 4 can be pulled out from the top of the flexible accommodating member 5 by hoisting after the subsequent grouting molding of the flexible accommodating member 5, so as to realize the recycling of the sealing fixing ring 4.

[0041] Reference Figure 3The top of the plugging fixing ring 4 is provided with a grouting hole 6 which penetrates and communicates with the inside of the flexible accommodation part 5. There are a plurality of grouting holes 6 evenly distributed around the axis of the plugging fixing ring 4, so as to facilitate grouting into the flexible accommodation part 5 through the grouting holes 6. After the plugging fixing ring 4 is installed in the steel casing 1 through the hanging device, grouting is performed into the flexible accommodation part 5 through the pipeline penetrating the grouting hole 6. The flexible accommodation part 5 after grouting is fitted into the gap between the bottom of the steel casing 1 and the top of the rock layer, so as to facilitate the plugging of the gap between the bottom of the steel casing 1 and the top of the rock layer, thereby playing a role in blocking the soft soil of the quicksand layer.

[0042] Reference Figure 3 and Figure 4 In order to further ensure the stability of the flexible accommodation part 5 during grouting, the sealing fixing ring 4 is slidably matched with a sealing stop plate 7 along its own axial direction. There are multiple sealing stop plates 7 evenly distributed around the axis of the sealing fixing ring 4. Each sealing stop plate 7 is located on the side of the flexible accommodation part 5 close to the axis of the sealing fixing ring 4, so that each sealing stop plate 7 plays a limiting role in grouting the flexible accommodation part 5, so that after the flexible accommodation part 5 is grouted, the gap between the bottom of the steel casing 1 and the top of the rock layer can be more stably sealed.

[0043] Reference Figure 4 In order to further ensure the stability of the blocking shift plate 7 when limiting the flexible accommodation member 5 and to prevent the blocking shift plate 7 from being easily separated from the blocking fixing ring 4, a blocking mounting plate 8 is fixedly connected to the side of the blocking fixing plate facing the axis of the blocking fixing ring 4, and a pressing spring 9 is fixedly arranged on the top of the blocking mounting plate 8, and one end of the pressing spring 9 away from the blocking mounting plate 8 is fixedly connected to the bottom of the blocking fixing ring 4. The elastic force of each pressing spring 9 on the blocking mounting plate 8 facilitates each blocking shift plate 7 to press against the uneven surface of the top of the rock layer, thereby fully and stably realizing the limiting of the flexible accommodation member 5.

[0044] Reference Figure 3 In order to further ensure the stability of the plugging fixing ring 4 when it is located in the steel casing 1, a plurality of fixing blocks 10 are arranged on the outer circumferential surface of the plugging fixing ring 4 and are evenly distributed around its own axis. Each fixing block 10 is radially penetrated by the plugging fixing ring 4 and slidably matched with the plugging fixing ring 4. The plugging driving member is used to drive each fixing block 10 to move in the axial direction away from the plugging fixing ring 4. When each fixing block 10 contacts the inner wall of the steel casing 1, a further limiting effect on the position of the plugging fixing ring 4 is achieved.

[0045] Continue to refer to Figure 3Specifically, the blocking drive member includes a blocking drive ring 11, and a drive rod 12 corresponding to the fixed block 10 is fixedly arranged at the bottom of the blocking drive ring 11, and each drive rod 12 is penetrated by the blocking fixed ring 4 and slidably cooperates with the blocking fixed ring 4, and a drive guide surface 13 is obliquely arranged at the bottom of each drive rod 12, and each fixed block 10 is respectively provided with a driven guide surface 14 that fits with the drive guide surface 13 at one end close to each drive rod 12, so that when the blocking drive ring 11 moves toward the blocking fixed ring 4 under the action of its own gravity, the fixed block 10 moves in the direction away from the blocking fixed ring 4 through the cooperation of the drive guide surface 13 and the driven guide surface 14.

[0046] Reference Figure 3 and Figure 5 The top of the plugging fixing ring 4 is also provided with a plurality of plugging springs 15 evenly distributed around its own axis. The plugging springs 15 exert elastic force on the plugging driving ring 11 to move toward the plugging fixing ring 4, so as to further ensure the stability of the position of each fixing block 10 after moving away from the plugging fixing ring 4. The plugging driving ring 11 is provided with a grouting clamping hole 16 corresponding to the grouting hole 6. The grouting clamping hole 16 is arranged along the axis of the plugging driving ring 11 and the grouting clamping hole 16 is engaged with the grouting pipe, so that the grouting clamping hole 16 plays a further role in limiting the position of the grouting pipe during grouting, which is conducive to further ensuring the stability of the position of the grouting pipe and facilitating the rapid and stable grouting of the inside of the flexible container 5 through the grouting pipe. The top of the blocking drive ring 11 is also provided with a clearance hole 20 which corresponds to the blocking shift plate 7 one by one and is arranged through it. Each blocking shift plate 7 is respectively plugged into and matched with each clearance hole 20 to fully ensure the movement stroke of the blocking shift plate 7 when it moves along the axial direction of the blocking fixing ring 4, thereby improving applicability.

[0047] Reference Figure 4 and Figure 5 The top of the plugging fixing ring 4 is provided with a positioning groove 17 extending along its own axis direction, and the plugging fixing ring 4 is fixedly installed with a positioning plate 18 for closing the notch of the positioning groove 17 by bolts. A plugging connecting rod 19 is fixedly installed at the bottom of the plugging driving ring 11, and a positioning portion 191 is fixedly connected to the end of the plugging connecting rod 19. The plugging connecting rod 19 is penetrated and slidably matched with the positioning plate 18. The positioning portion 191 is located in the positioning groove 17 and slidably matches with the positioning groove 17 to further ensure the stability of the plugging driving ring 11 when it moves toward the direction close to the plugging fixing ring 4. At the same time, the position of the plugging connecting rod 19 is limited, so that the plugging connecting rod 19 is not easy to be separated from the positioning groove 17.

[0048] S3, backfill the steel casing 1 with concrete, the backfill height is 1m above the bottom of the steel casing, and drill holes in the backfilled concrete after the concrete solidifies to the required strength; further, before backfilling the steel casing 1 with concrete, the plugging drive ring 11 and the plugging fixing ring 4 are hoisted in turn and taken out of the steel casing 1 to facilitate the recycling of the plugging drive ring 11 and the plugging fixing ring 4.

[0049] S4, after the hole is drilled to the designed rock penetration depth, the steel cage is lowered and concrete is poured to finally realize the formation of the cast-in-place pile.

[0050] The implementation principle of the method for rapid pile formation in a complex construction environment in the embodiment of the present application is as follows: during the bored pile formation process, the installation of the steel casing 1 is carried out simultaneously with the drilling, which is conducive to ensuring the stability of the hole wall during the drilling process in the quicksand layer, so that the hole wall is not easy to collapse during the drilling process. When drilling the rock layer through the quicksand layer later, the plugging fixing ring 4 and the plugging driving ring 11 of the plugging member are hoisted into the steel casing 1, and when the plugging shift plate 7 at the bottom of the plugging fixing ring 4 is pressed against the top of the rock layer, the lifting and fixing of the plugging driving ring 11 is released, so that each fixing block 10 moves in the axial direction away from the plugging fixing ring 4, and when each fixing block 10 is pressed against the inner wall of the steel casing 1, the position of the plugging fixing ring 4 is fixed.

[0051] Then, grouting is performed into the flexible container 5 through the pipes passing through the grouting holes 16 and the grouting holes 6. The flexible container 5 after grouting is fitted into the gap between the bottom of the steel casing 1 and the top of the rock layer, thereby playing a role in blocking the soft soil of the quicksand layer, making it difficult for the soft soil of the quicksand layer to penetrate into the hole through the gap between the bottom of the steel casing 1 and the rock layer, which is conducive to ensuring the quality of subsequent bored piles. After the plugging piece blocks the gap between the bottom of the steel casing 1 and the rock layer, backfilling with concrete is conducive to ensuring a smooth transition between the quicksand layer and the rock layer inside the steel casing 1 during the subsequent drilling process, which is conducive to improving the quality of the hole and enhancing the structural stability of the subsequent bored piles after the piles are formed.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for rapid pile construction in a complex construction environment, characterized by: The method comprises the following specific steps: S1, drilling a quicksand layer, and simultaneously installing a steel casing (1) during the drilling process of the quicksand layer to ensure the stability of the hole wall in the quicksand layer; S2, the hole is drilled to the rock layer, and the bottom of the steel casing (1) contacts the top of the rock layer; S3, backfilling concrete into the steel casing (1), the backfill height being 1 m above the bottom of the steel casing, and drilling holes in the backfilled concrete after the concrete solidifies to a required strength; S4, after the hole is drilled to the designed rock penetration depth, the steel cage is lowered and concrete is poured to finally realize the formation of the cast-in-place pile.

2. The method for rapid pile construction in a complex construction environment according to claim 1, characterized in that: In step S2, when the bottom of the steel casing (1) contacts the top of the rock layer, a sealing member is placed in the steel casing (1), and the gap between the bottom of the steel casing (1) and the top of the rock layer is sealed by the sealing member, wherein the sealing member comprises a sealing fixing ring (4) and a flexible receiving member (5), wherein the flexible receiving member (5) is installed on the sealing fixing ring (4), and the sealing fixing ring (4) is provided with a grouting hole (6) which is connected to the inside of the flexible receiving member (5).

3. The method for rapid pile construction in a complex construction environment according to claim 2, characterized in that: A plurality of grouting holes (6) are distributed circumferentially around the axis of the plugging fixing ring (4); the plugging fixing ring (4) is provided with a plugging stop plate (7); and the plugging stop plate (7) is located on one side of the flexible accommodation component (5) close to the axis of the plugging fixing ring (4).

4. The method for rapid pile construction in a complex construction environment according to claim 3, characterized in that: A plurality of the blocking shift plates (7) are circumferentially distributed around the axis of the blocking fixed ring (4), and each of the blocking shift plates (7) is slidably engaged with the blocking fixed ring (4) along the axis of the blocking fixed ring (4). The blocking fixed ring (4) is provided with a pressure spring (9) corresponding to the blocking shift plates (7) one by one, and each of the pressure springs (9) has one end connected to the blocking fixed ring (4) and the other end connected to each of the blocking shift plates (7).

5. The method for rapid pile construction in a complex construction environment according to claim 2, characterized in that: The outer peripheral surface of the blocking fixing ring (4) is provided with a plurality of fixing blocks (10) distributed circumferentially around its own axis, and the blocking fixing ring (4) is provided with a blocking driving member for driving each fixing block (10) to move in a direction away from its own axis.

6. The method for rapid pile construction in a complex construction environment according to claim 5, characterized in that: The blocking drive member comprises a blocking drive ring (11), a driving rod (12) arranged in one-to-one correspondence with the fixing block (10) being fixedly arranged at the bottom of the blocking drive ring (11), a driving guide surface (13) being arranged at the bottom of the driving rod (12), the driving rod (12) being inserted through the blocking fixing ring (4) and slidingly engaged with the blocking fixing ring (4), and a driven guide surface (14) being in contact with the driving guide surface (13) being arranged at one end of the fixing block (10) close to the driving rod (12).

7. The method for rapid pile construction in a complex construction environment according to claim 6, characterized in that: The blocking fixing ring (4) is provided with a blocking spring (15) for driving the blocking driving ring (11) to move towards a direction approaching the blocking fixing ring (4).

8. The method for rapid pile construction in a complex construction environment according to claim 6, characterized in that: The blocking driving ring (11) is fixedly mounted with a blocking connecting rod (19), the end of the blocking connecting rod (19) is fixedly connected with a locking portion (191), the top of the blocking fixing ring (4) is provided with a locking groove (17) extending along the axial direction of the blocking fixing ring (4), the locking portion (191) is slidably engaged in the locking groove (17), the blocking fixing ring (4) is fixedly mounted with a locking plate (18) for closing the notch of the locking groove (17), and the blocking connecting rod (19) is passed through and slidably engaged with the locking plate (18).

9. The method for rapid pile construction in a complex construction environment according to claim 6, characterized in that: The plugging drive ring (11) is provided with a grouting clamping hole (16) arranged corresponding to the grouting hole (6), and the grouting clamping hole (16) is clamped and matched with the grouting pipeline.

10. The method for rapid pile construction in a complex construction environment according to claim 1, characterized in that: In step S1, the steel casing (1) comprises a plurality of casing bodies (101) which are sequentially spliced ​​together, and two adjacent casing bodies (101) are welded and fixed, wherein one end of one casing body (101) facing the other casing body (101) is fixedly connected with a connecting block (2), and another adjacent casing body (101) has a connecting hole (3) corresponding to the connecting block (2) and plugged into the connecting block (2) at one end thereof.

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