Water area space continuous pile wall integrated construction method

Abstract

The application discloses a water area space continuous pile wall integrated construction method, which comprises the following steps: hoisting a pile head locking device with an A sequence pile and a B sequence pile guide opening, erecting a cantilever type construction platform with a guide pipe, laying an interlocking pile guide assembly, lowering a recoverable steel sleeve along the guide assembly, cutting and penetrating the steel sleeve with an alloy cutter head to a rock surface through a riprap stratum by a full-rotation drilling machine, and completing obstacle removal and soil taking in the sleeve to form a hole, and cooperating with a rotary excavator, a down-the-hole hammer, a reverse circulation drilling machine and other equipment to form a rock-embedded hole to a design depth of a pile hole. A rigid plastic pipe mold is used to pour concrete to form the A sequence pile, and interval construction of multiple A sequence piles is completed at a design interval, interlocking cutting of adjacent A sequence piles is performed at a B sequence pile position to form a hole, a flexible mold bag and a steel reinforcement cage are lowered and poured with concrete to form the B sequence pile interlocked with the A sequence pile, and cyclic construction is performed to alternately interlock the A sequence pile and the B sequence pile to form the water area continuous pile wall. The technical problem of interlocking pile wall construction without a hole wall support in a suspended section of a water area space is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, specifically to an integrated construction method for continuous pile walls in water spaces. Background Technology

[0002] Continuous pile walls in water spaces are widely used in water engineering projects such as the renovation and expansion of seaports and wharves. However, existing continuous pile wall construction processes are cumbersome, lacking integrated positioning and forming control in each stage, resulting in complex overall construction organization. Furthermore, current construction methods struggle to form stable, continuously interlocking pile wall structures in suspended sections, riprap layers, and rock-embedded areas within water spaces. The lack of unified constraints and connection control during pile construction makes the formed continuous pile walls prone to structural instability. This fails to meet the stability requirements of continuous pile wall structures in suspended sections, riprap layers, and rock-embedded areas within water spaces, increasing the risks associated with the construction and subsequent use of continuous pile walls in water spaces. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated construction method for continuous pile walls in water space, which can construct continuous pile walls in water space that meet the construction conditions of riprap layers and rock embedding in water.

[0004] This application provides a method for integrated construction of continuous pile walls in water spaces, including the following steps:

[0005] S1. Hoist the pile head locking device with A-sequence pile and B-sequence pile guide openings, build a cantilevered construction platform with guide pipes, and install interlocking pile guide components.

[0006] S2. The recyclable steel casing is lowered along the guide assembly. The casing is cleared of obstacles and soil is removed to form a hole. The full-rotation drilling rig drives the steel casing with alloy cutter head to cut through the rock boulders to the rock surface. It is then used in conjunction with rotary drilling rigs, down-the-hole hammers, reverse circulation drilling rigs and other equipment to form a rock-embedded hole to the designed depth of the pile hole.

[0007] S3. Use pipe molds to pour concrete to form A-sequence piles, and complete the construction of multiple A-sequence piles at intervals according to the design spacing.

[0008] S4. For the B-sequence pile position, interlock and cut the adjacent A-sequence pile hole, put down the flexible formwork bag and the steel cage and pour concrete to form the B-sequence pile that interlocks with the A-sequence pile.

[0009] S5. Cyclic construction causes A and B sequence piles to interlock alternately, forming a continuous pile wall in the water area.

[0010] In some embodiments, step S1 includes:

[0011] S11. Measure and mark the pile positions according to the pile wall axis, and hoist the pile head locking device to the construction position;

[0012] S12. Align the axis and levelness of the pile head locking device and fix it to the construction reference surface;

[0013] S13. Secure the support end of the cantilevered construction platform to the pile head locking device, and adjust the platform guide tube to be coaxial with the guide port.

[0014] S14. Fix the interlocking pile guide assembly to the platform, and align the guide assembly, guide tube, and guide port coaxially.

[0015] In some embodiments, step S2 includes:

[0016] S21. After the recyclable steel casing is coaxially aligned with the guide tube by the guide assembly, it is lowered section by section.

[0017] S22. The full-rotation drilling rig drives the steel casing with alloy cutter head to cut through the rock strata to the rock surface, and uses a grabbing operation to remove obstacles such as rocks and soil inside the steel casing;

[0018] S23. Continue drilling downwards using a rotary drilling rig, down-the-hole hammer, and reverse circulation drilling rig to form a hole embedded in the rock to the designed depth of the pile hole.

[0019] In some embodiments, step S3 includes:

[0020] S31. Place the rigid plastic pipe mold coaxially into the recyclable steel sleeve and calibrate the verticality and burial depth of the pipe mold.

[0021] S32. Place the metal frame into the rigid plastic tube mold and complete the positioning and fixation;

[0022] S33. Pour concrete into the rigid plastic tube mold to the design elevation of the pile top;

[0023] S34. After the concrete has initially set, the recyclable steel sleeves are pulled out one by one, and the rigid plastic pipe molds are left to form the A-sequence piles.

[0024] In some embodiments, the tube mold is a rigid plastic tube mold, and step S3 further includes:

[0025] S35. Construct the piles sequentially according to the preset pile spacing, complete the interval forming of multiple A-sequence piles, and reserve the construction gap for B-sequence piles.

[0026] In some embodiments, step S4 includes:

[0027] S41. According to the position of the B-sequence pile guide port on the pile head locking device, the B-sequence pile is positioned for construction by the guide component;

[0028] S42. Lower the recyclable steel sleeve along the guide assembly to perform interlocking cutting to form holes for obstacles in the preset contour position and the already formed A-sequence pile, so that the B-sequence pile hole fits into the A-sequence pile.

[0029] S43. Remove sediment from the B-sequence pile hole.

[0030] In some embodiments, step S4 further includes:

[0031] S44. Lower the flexible formwork and the steel cage coaxially to the design depth of the B-sequence pile hole.

[0032] S45. Continuously pour concrete into the flexible formwork bag, and gradually pull up the steel sleeve as the concrete pouring height increases.

[0033] S46. During the upward pulling process of the steel casing, the flexible mold bag exposed will expand with the circumferential support of the flowing concrete stress after losing the constraint of the steel casing. The outer wall of the flexible mold bag will be bonded to the cut surface and hole wall of the adjacent A-sequence pile.

[0034] In some embodiments, after the concrete pouring of the A and B sequence piles is completed, the top of the piles is leveled and trimmed to make the top elevation of all interlocking piles uniform.

[0035] The beneficial effects of this invention are: it simplifies the construction process of continuous pile walls in water areas through an integrated construction process; it forms continuous positioning constraints by relying on pile head locking devices, cantilevered construction platforms, and interlocking pile guide components; it allows for the recovery of steel casings in conjunction with a full-rotation drilling rig to drive steel casings with alloy cutter heads to cut through riprap strata to the rock surface; it can directly cut through thick riprap layers and sandy rock layers; the casing-in-the-tube punching operation can efficiently remove obstacles inside thick riprap layers; and it can use rotary drilling rigs, down-the-hole hammers, reverse circulation drilling rigs, and other equipment to efficiently drill holes in bedrock in rock-embedded sections, adapting to the complex geological conditions of thick riprap layers and rock strata in water areas, and ensuring the verticality of the hole and the quality of the pile hole formation. The recyclable steel casing runs through the entire suspended section of the pile body in the sea area, forming a rigid borehole wall support structure. This isolates the pile body from the water scouring and lateral pressure brought by ocean currents and waves, and counteracts the lateral load generated by the continuous impact of water flow in the marine construction environment. This allows the pile body to withstand the adverse effects of ocean currents and waves in the suspended section of the sea area and to be stably formed. This solves the technical problem that the pile body cannot be stably formed in the suspended section of the water area without borehole wall support. The rigid plastic pipe mold ensures the regularity of the A-sequence pile formation and can be stably removed along with the A-sequence pile in the subsequent interlocking and cutting construction. The grouting method of using flexible mold bags in conjunction with the steel casing to gradually pull out can effectively improve the interlocking and fitting of the B-sequence pile and the A-sequence pile. The cyclical alternation construction makes the pile body tightly connected, and the stability of the integrally formed continuous pile wall structure is improved. The construction process is simpler and can stably complete the construction of large-diameter continuous pile walls in thick riprap and rock geology. The complete set of positioning, drilling, and interlocking molding components is adapted to the working environment of sea areas with varying water depths, tides, and the absence of large piers at sea. It breaks the limitation that land-based interlocking pile construction equipment and processes can only be used in land conditions, enabling the mature land-based interlocking pile technology to be fully transferred and stably applied to marine space construction scenarios. Attached Figure Description

[0036] Figure 1 This is a flowchart of an integrated construction method for continuous pile wall in water space according to the present invention;

[0037] Figure 2 This is a schematic diagram of the cantilevered construction platform erected in step S1 of the present invention;

[0038] Figure 3 This is a schematic diagram of cutting the recyclable steel sleeve during step S2 of the present invention.

[0039] Figure 4 This is a schematic diagram of the forming of sequence A piles in step S3 of the present invention;

[0040] Figure 5 This is a schematic diagram of forming multiple A-sequence piles in step S3 of the present invention;

[0041] Figure 6 This is a schematic diagram of the forming of the B-sequence pile in step S4 of the present invention;

[0042] Figure 7 This is a schematic diagram of the formation of a continuous waterway pile wall in step S5 of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] Continuous pile walls in waterways are a common support structure in harbor terminal expansion and renovation projects. However, existing construction techniques have shortcomings in pile positioning, interlocking connections, and overall forming control, resulting in poor stability of the continuous pile wall structure during construction and after forming. Current construction methods lack integrated continuous guiding and positioning devices, resulting in a lack of unified constraint on the top of the piles, making pile position prone to displacement during construction and causing low interlocking accuracy between adjacent piles. During construction in the marine rockfill layer, there is no stable guiding support for drilling and casing lowering. The commonly used vibratory sinking of steel pipes easily leads to pipe edge curling, resulting in construction failure. Simultaneously, the verticality and external dimensions of the pile holes are difficult to control, and the regularity of pile forming is insufficient. Conventional A-sequence piles lack dedicated rigid forming molds, making them difficult to interlock and cut for subsequent construction. Furthermore, when constructing B-sequence piles, the removal of conventional rigid molds leaves gaps, preventing effective interlocking with A-sequence piles and resulting in weak connections between piles. During continuous construction, the spacing and interlocking of pile positions cannot be kept uniform, the connection between piles is loose, the integrity of the overall pile wall is insufficient, and situations such as pile misalignment and interlocking failure are prone to occur, which cannot guarantee the structural stability of the continuous pile wall in water area.

[0049] In view of this, refer to Figure 1 This application provides a method for integrated construction of continuous pile walls in water spaces, comprising:

[0050] Reference Figure 1 and Figure 2 S1, hoist the pile head locking device with A-sequence pile and B-sequence pile guide ports, erect a cantilevered construction platform with guide pipes, and lay out interlocking pile guide components. The construction operation is carried out according to the design axis of the water pile wall. The placement of all structural components corresponds to the design pile position, and the components form a continuous positioning and cooperation relationship, providing a stable working foundation for subsequent pile construction.

[0051] S11. Measure and mark the pile positions according to the pile wall axis. The positioning marks are determined based on the overall design scheme of the continuous pile wall in the water area. The marking points are evenly distributed along the pile wall axis. The plane coordinates of the marking positions are completely consistent with the design pile position coordinates. The positioning marks serve as the reference for the placement of the pile head locking device to ensure that the layout of the pile head locking device meets the construction requirements.

[0052] S12, calibrate the axis and level of the pile head locking device. Adjust the length axis of the pile head locking device to coincide with the design axis of the continuous pile wall. At the same time, adjust the top surface of the pile head locking device to a horizontal state. After calibration, fix the pile head locking device to the construction reference surface. The bottom surface of the pile head locking device should be in close contact with the construction reference surface. The fixed device will not produce horizontal displacement or vertical shaking, and will maintain the overall position stability.

[0053] S13, the support end of the cantilever construction platform is fixedly connected to the pile head locking device. The bottom surface of the support end of the cantilever construction platform is rigidly connected to the top surface of the pile head locking device. The connection position corresponds to the guide port area of ​​the pile head locking device. The platform guide tube and the guide port of the pile head locking device are adjusted to be coaxial. The central axis of the platform guide tube coincides with the central axis of the guide port. The inner wall of the guide tube provides preliminary vertical guidance constraint for the recyclable steel sleeve.

[0054] S14. The interlocking pile guide component is fixed to the top surface of the cantilever construction platform. The bottom surface of the interlocking pile guide component is tightly connected to the top surface of the platform. The central axis of the interlocking pile guide component, the central axis of the platform guide tube, and the central axis of the guide port of the pile head locking device are coaxially aligned. The interlocking pile guide component is used to constrain the radial position of the retrievable steel sleeve, avoid the retrievable steel sleeve from shifting during the lowering process, and improve the positioning accuracy of the hole drilling construction.

[0055] In some embodiments, a radial guide roller is provided inside the interlocking pile guide assembly. The radial guide roller is evenly distributed along the circumference of the inner wall of the assembly. The radial guide roller forms a rolling fit with the outer wall of the recyclable steel casing, which reduces the frictional resistance when the recyclable steel casing is lowered and ensures that the casing lowering process is smooth and stable.

[0056] Reference Figure 1 and Figure 3 S2, along the guide assembly, the recyclable steel casing is lowered, the casing is cleared and soil is removed to form a hole, and the full-rotation drilling rig drives the steel casing with alloy cutter head to cut through the rock strata to the rock surface. With the help of rotary drilling rig, down-the-hole hammer, reverse circulation drilling rig and other equipment, the rock is embedded to form a hole to the designed depth of the pile hole. The construction process relies on the guide structure to complete the precise lowering of the recyclable steel casing. Special equipment is used to complete the internal cleaning of the casing and the cutting of the strata and to embed the rock to form a hole in place, forming a pile hole structure that meets the design requirements.

[0057] S21, the recyclable steel casing is lowered section by section after being coaxially aligned with the guide tube by the guide assembly. The outer wall of the recyclable steel casing slides and engages with the inner wall of the interlocking pile guide assembly. During the lowering process, the central axis of the recyclable steel casing always coincides with the central axis of the guide assembly. The casing sections lowered section by section are connected in sequence, and the connection position is kept sealed.

[0058] S22 employs a grabbing operation to remove obstacles such as rocks and soil inside the steel casing. The grabbing equipment moves vertically along the inner wall of the recyclable steel casing, and the working end of the equipment contacts the obstacles inside the casing and completes the grabbing and removal operation until there are no remaining obstacles inside the casing, providing an unobstructed working space for subsequent rock-embedded drilling.

[0059] S23, a full-rotation drilling rig driven by a steel casing with alloy cutter head, cuts through the rocky strata to the rock surface. It works in conjunction with rotary drilling rigs, down-the-hole hammers, reverse circulation drilling rigs and other equipment to drill holes into the rock to the designed depth of the pile hole. This effectively drills holes in hard rock strata while ensuring that the verticality of the pile hole meets construction standards.

[0060] Reference Figure 1 and Figure 4 S3 uses rigid plastic pipe molds to form A-sequence piles. Multiple A-sequence piles are constructed at intervals according to the design spacing. The rigid plastic pipe molds limit the external dimensions of the A-sequence piles. The pile body is formed by the metal frame and concrete pouring. The A-sequence pile structure is formed by constructing the piles at intervals according to the design spacing.

[0061] S31, the rigid plastic tube mold is coaxially placed inside the recyclable steel sleeve. The outer wall of the rigid plastic tube mold and the inner wall of the recyclable steel sleeve maintain a uniform clearance fit. The verticality and burial depth of the rigid plastic tube mold are adjusted so that the bottom end of the rigid plastic tube mold extends to the designed bottom elevation of the pile hole. The rigid plastic tube mold is used to fix the external forming dimensions of the A-sequence pile, ensuring that the pile body has a regular shape, and at the same time, it is easy to be partially removed by subsequent biting and cutting operations.

[0062] S32 allows the metal frame to be placed inside the rigid plastic tube mold and positioned and fixed. The metal frame is placed at the center of the rigid plastic tube mold to improve the overall structural strength of the A-sequence pile.

[0063] S33, pour concrete into the rigid plastic tube mold to the design elevation of the pile top. The concrete is evenly filled along the inner wall of the rigid plastic tube mold. During the filling process, it is gradually and fully vibrated to ensure that the concrete is dense and without voids or gaps. The top surface of the concrete is at the same height as the top surface of the guide port of the pile head locking device.

[0064] S34. After the concrete has initially set, the recyclable steel sleeve is pulled out step by step. The recyclable steel sleeve moves vertically upward at a uniform speed, gradually separating from the formed A-sequence pile structure. The rigid plastic pipe mold is left outside the A-sequence pile to form a permanent protective layer, maintaining the shape and structural stability of the A-sequence pile body.

[0065] In some embodiments, S31 includes placing a metal frame inside a rigid plastic pipe mold, pre-assembling it on the ground or a construction platform, and placing the metal frame at the center of the rigid plastic pipe mold.

[0066] S32 includes hoisting the assembled rigid plastic pipe mold with a metal frame as a whole and vertically placing it into the recyclable steel casing. The outer wall of the rigid plastic pipe mold and the inner wall of the recyclable steel casing maintain a uniform gap fit. The verticality and burial depth of the rigid plastic pipe mold are adjusted so that the bottom end of the rigid plastic pipe mold extends to the designed bottom elevation of the pile hole.

[0067] Reference Figure 5 S35, construction is carried out sequentially according to the preset pile spacing to complete the interval forming operation of multiple A-sequence piles. A construction gap matching the design outline of the B-sequence pile is reserved between adjacent A-sequence piles. The size and position of the reserved gap meet the construction requirements of interlocking piles, and reserve operating space for the subsequent interlocking construction of B-sequence piles.

[0068] In some embodiments, a positioning protrusion is provided on the outer wall of the rigid plastic pipe mold. The positioning protrusion cooperates with the positioning groove on the inner wall of the recyclable steel sleeve to fix the vertical position of the rigid plastic pipe mold and prevent the rigid plastic pipe mold from floating or shifting during the concrete pouring process.

[0069] Reference Figure 1 and Figure 6 S4. For the B-sequence pile position, the adjacent A-sequence pile is cut into a hole, a flexible formwork bag and a reinforcing cage are lowered and concrete is poured. As the concrete pouring height increases, the steel sleeve is gradually pulled up. During the upward pulling of the steel sleeve, the flexible formwork bag exposed will expand with the circumferential support of the flowing concrete stress after losing the constraint of the steel sleeve, and will fit with the cut surface and hole wall of the adjacent A-sequence pile to form a B-sequence pile that interlocks with the A-sequence pile.

[0070] S41, according to the position of the B-sequence pile guide port on the pile head locking device, the B-sequence pile is positioned for construction by the guide component.

[0071] Before construction, the pile head area has been equipped with a continuous pile head guide and locking device according to the surveying, setting out and verification. The device is assembled and detachable and fixed to the bank foundation. It can limit and lock the spatial position of the continuous pile wall with high precision, ensuring the accurate position of the continuous pile wall during construction and after its formation.

[0072] S42, the recyclable steel casing is lowered along the guide assembly, so that the central axis of the recyclable steel casing coincides with the central axis of the B-sequence pile position. The steel casing with alloy cutter head is driven by a full-rotation drilling rig to perform interlocking cutting to form a hole for the obstacles and the already formed A-sequence pile within the preset contour position. The cutting contour covers the design size and interlocking size of the B-sequence pile, so that the B-sequence pile hole and the A-sequence pile form an interlocking structure.

[0073] S43, Remove sediment from the B-sequence pile hole. The sediment removal equipment moves along the inner wall of the B-sequence pile hole to completely clean the cutting waste and soil inside the hole. The inner wall of the pile hole is flat and without protrusions, which meets the construction conditions for pile casting.

[0074] S44, the flexible formwork bag and the reinforcing cage are coaxially lowered to the design depth of the B-sequence pile hole. The outer wall of the flexible formwork bag and the inner wall of the B-sequence pile hole maintain a uniform gap fit. The flexible formwork bag completely wraps around the outside of the reinforcing cage. The outer dimensions of the flexible formwork bag after unfolding match the design dimensions of the B-sequence pile.

[0075] S45, continuously pour concrete into the flexible formwork bag of the B-sequence pile hole. The discharge end of the concrete pouring equipment extends to a certain distance to the bottom of the pile hole. During the pouring process, the recyclable steel sleeve is pulled out step by step. The pulling speed of the recyclable steel sleeve is matched with the concrete pouring speed to ensure that the concrete surface is left at a certain height inside the steel sleeve.

[0076] S46, the flexible formwork bag gradually expands as the concrete is poured. The outer wall of the flexible formwork bag fits tightly against the side wall of the adjacent A-sequence pile after it has been cut. After the concrete solidifies, a complete B-sequence pile structure is formed. The flexible formwork bag ensures that the B-sequence pile and the A-sequence pile are tightly interlocked, thus improving the stability of the pile connection.

[0077] In some embodiments, a sealing structure is provided at the edge of the flexible formwork bag, and the sealing structure is closed around the circumference of the flexible formwork bag to prevent concrete slurry leakage and ensure the forming quality and interlocking effect of the B-sequence pile.

[0078] Reference Figure 1 and Figure 7 S5, cyclical construction involves alternating engagement of A-sequence and B-sequence piles to form a continuous pile wall in the water area. This maintains consistent construction parameters and continuous operation to create a complete continuous pile wall structure. Throughout construction, the center-to-center distance and engagement amount of the piles are kept consistent with the design parameters. The dimensional error of the center-to-center distance is controlled within the allowable construction range, and the actual size of the engagement amount matches the design value, ensuring no deviation in the engagement position of adjacent piles. Construction continues to the designed length of the water area pile wall, with multiple sets of A-sequence and B-sequence piles alternately connected and interlocked between adjacent piles to complete the overall continuous pile wall formation. The overall axis of the continuous pile wall coincides with the design axis.

[0079] After the concrete pouring of the B-sequence piles is completed, the top of the piles is leveled and repaired. The repair equipment contacts the concrete surface of the pile top, removes the excess concrete, and fills the surface depressions to make the top elevation of all interlocking piles uniform and the pile top surface flat without any height difference.

[0080] This construction method utilizes a pile head locking device, a cantilevered construction platform, and interlocking pile guide components to form a multi-layered positioning structure. The drilling rig drives the steel casing to cut through the riprap strata to the rock surface, and a rotary drilling rig is used to embed the hole in the rock to complete the precise hole-forming operation. The rigid plastic pipe mold shapes the A-sequence pile's external dimensions and can be stably removed along with the A-sequence pile during subsequent interlocking and cutting construction. The use of flexible mold bags in conjunction with the steel casing for gradual extraction of the grouting method can effectively improve the interlocking fit between the B-sequence pile and the A-sequence pile, achieving a tight interlocking between the two. Cyclic alternating construction can form a continuous and complete pile wall structure, simplifying the construction process while improving the overall structural stability of the continuous pile wall in water areas. The pile positioning is precise, the interlocking connection is tight, and there are no misalignments or interlocking failures, meeting the construction and use requirements of water area projects.

[0081] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

Claims

1. A method for integrated construction of continuous pile walls in water space, characterized in that, Includes the following steps: S1. Hoist the pile head locking device with A-sequence pile and B-sequence pile guide openings, build a cantilevered construction platform with guide pipes, and install interlocking pile guide components. S2. The recyclable steel casing is lowered along the guide assembly. The full-rotation drilling rig drives the steel casing with alloy cutter head to cut through the rock boulders to the rock surface. The casing is cleared of obstacles and soil is removed to form a hole. The rotary drilling rig is then used to embed the rock to form a hole to the designed depth of the pile hole. S3. Use pipe molds to pour concrete to form A-sequence piles, and complete the construction of multiple A-sequence piles at intervals according to the design spacing. S4. For the B-sequence pile position, interlock and cut the adjacent A-sequence pile hole, put down the flexible formwork bag and the steel cage and pour concrete to form the B-sequence pile that interlocks with the A-sequence pile. S5. Cyclic construction causes A and B sequence piles to interlock alternately, forming a continuous pile wall in the water area.

2. The construction method according to claim 1, characterized in that, Step S1 includes: S11. Measure and mark the pile positions according to the pile wall axis, and hoist the pile head locking device to the construction position; S12. Align the axis and levelness of the pile head locking device and fix it to the construction reference surface; S13. Secure the support end of the cantilevered construction platform to the pile head locking device, and adjust the platform guide tube to be coaxial with the guide port. S14. Fix the interlocking pile guide assembly to the platform, and align the guide assembly, guide tube, and guide port coaxially.

3. The construction method according to claim 1, characterized in that, Step S2 includes: S21. After the recyclable steel casing is coaxially aligned with the guide tube by the guide assembly, it is lowered section by section. S22. The full-rotation drilling rig drives the steel casing with alloy cutter head to cut through the rock strata to the rock surface, and uses a grabbing operation to remove obstacles such as rocks and soil inside the steel casing; S23. Continue drilling downwards using a rotary drilling rig, down-the-hole hammer, and reverse circulation drilling rig to form a hole embedded in the rock to the designed depth of the pile hole.

4. The construction method according to claim 1, characterized in that, The tube mold is a rigid plastic tube mold, and step S3 includes: S31. Place the rigid plastic pipe mold coaxially into the recyclable steel sleeve and calibrate the verticality and burial depth of the pipe mold. S32. Place the metal frame into the rigid plastic tube mold and complete the positioning and fixation; S33. Pour concrete into the rigid plastic tube mold to the design elevation of the pile top; S34. After the concrete has initially set, the recyclable steel sleeves are pulled out one by one, and the rigid plastic pipe molds are left to form the A-sequence piles.

5. The construction method according to claim 4, characterized in that, Step S3 also includes: S35. Construct the piles sequentially according to the preset pile spacing, complete the interval forming of multiple A-sequence piles, and reserve the construction gap for B-sequence piles.

6. The construction method according to claim 1, characterized in that, Step S4 includes: S41. According to the position of the B-sequence pile guide port on the pile head locking device, the B-sequence pile is positioned for construction by the guide component; S42. Lower the recyclable steel sleeve along the guide assembly to perform interlocking cutting to form holes for obstacles in the preset contour position and the already formed A-sequence pile, so that the B-sequence pile hole fits into the A-sequence pile. S43. Remove sediment from the B-sequence pile hole.

7. The construction method according to claim 6, characterized in that, Step S4 also includes: S44. Lower the flexible formwork and the steel cage coaxially to the design depth of the B-sequence pile hole. S45. Continuously pour concrete into the flexible formwork bag, and gradually pull up the steel sleeve as the concrete pouring height increases. S46. During the upward pulling process of the steel casing, the flexible mold bag exposed will expand with the circumferential support of the flowing concrete stress after losing the constraint of the steel casing. The outer wall of the flexible mold bag will be bonded to the cut surface and hole wall of the adjacent A-sequence pile.

8. The construction method according to claim 7, characterized in that, After the concrete pouring of piles A and B is completed, the top of the piles is leveled and trimmed to ensure that the top elevation of all interlocking piles is uniform.

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