Detachable base type multi-pile guiding and positioning pile stabilizing platform and pile sinking construction method thereof

Abstract

The invention discloses a detachable base type multi-pile guiding and positioning pile stabilizing platform and a pile sinking construction method thereof. The platform comprises a seat bottom supporting frame, and the seat bottom supporting frame is located on a seabed. The positioning steel pile is driven into a seabed and is connected and leveled with the support frame through a suspension device; the primary sliding frame can longitudinally slide along the support frame to rectify deviation; the secondary sliding operation platform is matched with the sliding rail of the primary frame through a guide rotating mechanism at the bottom of the secondary sliding operation platform, transverse sliding and azimuth angle rotation can be achieved, transverse and angle deviation correction can be conducted, and a guide hole and a pushing piece used for fine adjustment of a pile body are arranged on the secondary sliding operation platform. The invention further discloses a three-stage deviation rectification pile sinking method based on the platform. By means of the structure and the method, the problem that offshore pile group sinking precision is insufficient under the complex sea condition is effectively solved, centimeter-level high-precision pile sinking is achieved, the platform has the advantages of being detachable, extensible and reusable, and construction efficiency, safety and economical efficiency are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore foundation construction, and in particular to a detachable seat bottom type multi-pile guiding and positioning pile stabilizing platform for offshore group pile foundation steel pipe pile sinking construction and a pile sinking construction method thereof. BACKGROUND

[0002] In the construction of offshore group pile foundation steel pipe piles, some projects have very high requirements for pile sinking accuracy, for example, the position deviation of the pile top horizontal surface at the design measurement surface needs to be less than 50 mm, and the verticality deviation needs to be less than 4 ‰. The existing pile sinking construction process of pile driving vessels, the pile sinking construction process of crane vessels, and the pile sinking construction process of ordinary pile stabilizing platforms cannot meet the above strict accuracy control requirements, which has become a bottleneck for project implementation. If the construction accuracy problem cannot be solved, the project will be stalled, and the construction task cannot be completed on time and with quality and quantity guaranteed.

[0003] At the same time, offshore construction also faces adverse factors such as poor sea conditions, large tidal range, bare beach at some times, small construction space, and complex construction site, which further increases the difficulty of pile sinking construction. The existing technology lacks a safe and reliable, convenient and flexible to operate pile sinking auxiliary device that can adapt to complex sea conditions and meet the requirements of project quality and construction progress.

[0004] Therefore, it is of great engineering significance to develop a pile stabilizing platform that can solve the above technical problems. SUMMARY

[0005] The present application aims to provide a detachable seat bottom type multi-pile guiding and positioning pile stabilizing platform to solve the problems of insufficient pile sinking accuracy, poor adaptability to complex sea conditions, and low construction efficiency in the prior art, and to achieve the purpose of quickly, accurately and safely completing offshore device and facility group pile foundation steel pipe pile sinking construction projects.

[0006] The present application provides a detachable seat bottom type multi-pile guiding and positioning pile stabilizing platform, which comprises: a seat bottom support frame for bearing the entire platform and sitting on the seabed; a positioning steel pile inserted into the seat bottom support frame and used for driving into the seabed to anchor the platform; a primary sliding bearing frame slidably mounted on the seat bottom support frame for realizing the deviation correction positioning of the platform along a first horizontal direction; a secondary sliding pile sinking operation platform slidably mounted on the primary sliding bearing frame for realizing the deviation correction positioning of the platform along a second horizontal direction perpendicular to the first horizontal direction, the secondary sliding pile sinking operation platform being provided with a guide hole corresponding to the design position of the group pile; and a suspension leveling device connected between the seat bottom support frame and the positioning steel pile for leveling and fixing the seat bottom support frame.

[0007] wherein the first horizontal direction is also referred to as the transverse direction, and the second horizontal direction is also referred to as the longitudinal direction.

[0008] Preferably, the seat bottom support frame comprises a frame body, at least one pair of first sliding rails fixed to the top of the frame body, and an anti-sinking plate provided at the bottom of the frame body for increasing the contact area with the seabed.

[0009] Further, the first sliding rails are steel pipe sliding rails.

[0010] Preferably, the seat bottom support frame further comprises positioning guide pipes vertically fixed to the four corners of the top thereof, and the positioning steel piles are inserted into the positioning guide pipes.

[0011] Preferably, the bottom of the first sliding bearing frame is provided with first sliding blocks adapted to the first sliding rails, and the top thereof is provided with at least one pair of second sliding rails; the first sliding bearing frame is of a modular structure, comprising at least two segments connected by detachable connecting members, so as to adjust the longitudinal dimension thereof.

[0012] Further, the first sliding blocks are steel sliding block supports, the second sliding rails are profile steel sliding tracks, and the detachable connecting members comprise connecting beams and flanges.

[0013] Preferably, the bottom of the second sliding pile sinking operation platform is connected to the second sliding rails through a guide rotating mechanism; the guide rotating mechanism has a rail clamping device releasably locked to the second sliding rails, so that the second sliding pile sinking operation platform can slide along the second sliding rails in the transverse direction and be locked at a predetermined position; the second sliding pile sinking operation platform is of a modular structure, comprising at least two segments connected by detachable connecting members, so as to expand the size thereof and adjust the spacing of the guide holes.

[0014] Preferably, the guide rotating mechanism further comprises a rotating arm base fixed to the second sliding pile sinking operation platform, and a direction adjusting driving member connected between the rotating arm base and a fixed fulcrum, and the direction adjusting driving member can be adjusted to drive the second sliding pile sinking operation platform to make azimuth angle fine adjustment around the rotating arm base fulcrum.

[0015] Further, the fixed fulcrum is a bolt fulcrum, and the direction adjusting driving member is a direction adjusting basket bolt.

[0016] Preferably, the second sliding pile sinking operation platform is provided with retractable pushing members at positions corresponding to the guide holes, for fine adjustment of the position and verticality of the steel pipe piles passing through the guide holes during the pile sinking process.

[0017] Further, the pushing members comprise upper and lower jacks symmetrically installed on both sides of the platform frame bottom.

[0018] Preferably, the suspension leveling device comprises a suspension steel wire rope and a suspension basket bolt, one end of the suspension steel wire rope is connected to the suspension lower lifting lug on the seat bottom support frame, the other end of the suspension steel wire rope is connected to the suspension basket bolt, the other end of the suspension basket bolt is connected to the suspension upper lifting lug on the positioning steel pile, and the horizontal degree adjustment of the seat bottom support frame is achieved by adjusting the length of the suspension basket bolt.

[0019] Preferably, the positioning measurement assembly for acquiring the spatial position information of the platform in real time is further included, and the positioning measurement assembly is installed on the secondary sliding pile sinking operation platform.

[0020] Further, the positioning measurement assembly is a GPS antenna.

[0021] The application also provides a pile sinking construction method based on the detachable seat bottom type multi-pile guide positioning pile stabilizing platform, comprising the following steps: Primary positioning and fixing of the platform: the pile stabilizing platform is hoisted to the vicinity of the designed position of the construction area, the positioning steel piles are driven, and the seat bottom support frame is leveled and fixed through the suspension leveling device; Primary deviation correction positioning: the primary sliding bearing frame is driven to slide along the first horizontal direction, and the secondary sliding pile sinking operation platform is driven to slide along the second horizontal direction, so that the group center of the guide holes coincides with the pile group design center of the steel pipe pile in the horizontal plane; Secondary deviation correction positioning: the azimuth angle of the secondary sliding pile sinking operation platform is finely adjusted through the guide rotating mechanism, so that the azimuth of each guide hole is consistent with the design azimuth of the corresponding steel pipe pile; Steel pipe pile insertion and fine adjustment: the steel pipe pile is hoisted and passed through the corresponding guide hole, and the position and perpendicularity of the steel pipe pile are finely adjusted by using the pushing piece, and then the steel pipe pile is self-sunk; Dynamic pile sinking and tertiary deviation correction: during the hammering pile sinking process, the posture of the steel pipe pile is monitored in real time, when the perpendicularity or position of the steel pipe pile deviates, the hammering is paused and the pushing piece is used for correction, and then the pile sinking is continued to the designed elevation. The one or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages: 1. The application adopts the combined structure of "seat bottom support frame + positioning steel pile + suspension device", cooperates with the design of the anti-sinking plate, effectively solves the problem of insufficient platform stability caused by poor sea conditions, large tidal range and bare beach of the seabed in the prior art, and further realizes reliable fixing and horizontal adjustment of the pile stabilizing platform in complex sea conditions, thereby ensuring the safety of the construction process.

[0022] 2. This application adopts a three-stage correction structure consisting of a primary sliding bearing frame, a secondary sliding pile driving platform, and a guide rotation mechanism. Combined with real-time monitoring by a GPS antenna and a total station, it effectively solves the technical problem of insufficient pile driving accuracy in the prior art (unable to meet the requirements of position deviation less than 50mm and verticality deviation less than 4‰). This achieves high-precision control of horizontal position deviation less than 33.75mm and verticality less than 2‰ after the steel pipe pile is driven, setting a new record for the accuracy of coastal steel pipe pile group driving.

[0023] 3. This application adopts a split design of flange and connecting beam, which makes the load-bearing frame and working platform upgradable and deformable. This effectively solves the technical problems of poor adaptability of existing pile stabilization platforms and inability to accommodate the construction of multiple types of foundation pile groups. As a result, one pile stabilization platform can be adapted to the pile driving construction of composite piles with two diameters of Φ2.15m and Φ2.35m, which greatly reduces construction costs and improves equipment utilization.

[0024] 4. This application adopts a detachable structure and modular assembly design, combined with an external lifting and lowering system, which effectively solves the technical problems of inconvenient transportation and storage of existing construction equipment and long construction cycle. This enables the rapid on-site disassembly, transportation and relocation of the pile stabilization platform, significantly saving construction time, reducing construction difficulty and improving construction efficiency.

[0025] 5. This application controls deviations step by step through three-level correction. Each level of correction provides sufficient accuracy margin for the next level, effectively solving the quality risk problem caused by the superposition of deviations in the existing process. This enables precise control of pile driving quality, eliminates construction quality risks, and lays the foundation for the early completion of the project. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] Figure 1 This is an isometric view of the detachable base-type multi-pile guiding and positioning stabilizing platform provided in the embodiments of this application; Figure 2 This is a schematic diagram of the base support frame structure in an embodiment of this application; Figure 3 This is a schematic diagram of the positioning steel pile structure in the embodiments of this application; Figure 4 This is a schematic diagram of a single-sliding load-bearing frame structure in an embodiment of this application; Figure 5 This is a schematic diagram of the upgraded and lengthened sliding bearing frame structure in an embodiment of this application; Figure 6 This is a schematic diagram of the secondary sliding pile driving operation platform structure in the embodiments of this application; Figure 7 This is an isometric schematic diagram of the guide rotation mechanism in the embodiments of this application; Figure 8 This is a top view of the guide rotation mechanism in the embodiments of this application; Figure 9 This is a schematic diagram of the upgraded and enlarged structure of the secondary sliding pile driving operation platform in the embodiments of this application; Figure 10 This is a front view of the suspension leveling device in an embodiment of this application; Figure 11 This is a side view of the suspension leveling device in an embodiment of this application; Figure 12 This is a schematic diagram of the hoisting of the detachable base-type multi-pile guiding and positioning stabilizing platform provided in the embodiments of this application.

[0028] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0029] To better understand the above technical solutions, exemplary embodiments will be described in detail below, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0030] Figure 1 The image shown is an isometric view of the detachable base-type multi-pile guiding and positioning stabilizing platform provided in this application embodiment. The detachable base-type multi-pile guiding and positioning stabilizing platform includes a base support frame 1, positioning steel piles 2, a primary sliding bearing frame 3, a secondary sliding pile driving operation platform 4, a suspension leveling device 5, a GPS antenna 6, etc.

[0031] Combination Figure 2 The base support frame 1, as the foundation of the entire pile stabilization platform, bears the weight of the entire platform and also the dynamic load transmitted during pile driving. The base support frame 1 is a rectangular steel frame structure, consisting of positioning guide tube 101, steel pipe slide 102, support frame lifting lug 103, lower suspension lug 104, horizontal brace 105, diagonal brace 106, anti-sinking plate 107, ladder, railing and corridor platform 108.

[0032] Positioning guide tubes 101 are vertically fixed to the four corners of the top of the base support frame for inserting positioning steel piles 2. Steel pipe slides 102 are fixed to the top along the long side of the base support frame, providing a sliding track for the primary sliding bearing frame 3. Support frame lifting lugs 103 serve as lifting force points, welded to the four corners of the top of the base support frame, and can be connected to equipment such as crane vessels via lifting locks to achieve lifting, transportation, lowering, and dismantling of the base support frame independently (or in combination with other platform components). Lower suspension lugs 104 are used to connect the positioning steel piles 2. Horizontal braces 105 and diagonal braces 106 are cross-welded inside the base support frame to enhance structural stability. Anti-sinking plates 107 are fixed to the bottom of the base support frame to increase the contact area with the seabed and prevent platform sinking. Ladders, railings, and walkway platforms 108 are welded to the sides of the base support frame for easy operation and passage by construction personnel. Combination Figure 3 The positioning steel pile 2 consists of a steel circular tube body 201, with suspension lugs 202 symmetrically welded to both sides of the top of the steel circular tube body 201. Each positioning steel pile corresponds to two suspension lugs 202. The positioning steel pile 2 is inserted into the positioning guide tube 101 of the base support frame. During pile driving construction, it is driven into the seabed bearing layer by a hydraulic vibratory hammer to achieve positioning and fixation of the entire pile stabilization platform and prevent horizontal slippage of the pile stabilization platform. Combination Figure 4 The primary sliding bearing frame 3 consists of a steel slide rail 301, a frame beam 302, a steel slider support 303, frame lifting lugs 304, a corridor railing 305, and a first flange 306. The steel slide rail 301 serves as the longitudinal beam of the frame, forming a rectangular bearing frame together with the frame beam 302. The steel slider support 303 is fixed to the bottom of the bearing frame and is adapted to the steel pipe slide rail 102 of the base support frame 1, allowing the bearing frame to slide longitudinally along the steel pipe slide rail 102. The steel slide rail 301 is fixed to the top along the short side of the bearing frame, providing a transverse sliding track for the secondary sliding pile driving platform 4. The frame lifting lugs 304 are welded to the four corners of the top of the bearing frame for hoisting operations. The corridor railing 305 is welded to the edge of the bearing frame to ensure construction safety.

[0033] Combination Figure 5 The frame beam 302 is divided into two sections, connected in the middle by a first flange 306. When the frame beam 302 needs to be lengthened, a first connecting beam 307 is added between the two sections. The two sections of the frame beam 302 and the first connecting beam 307 are respectively bolted to the two ends of a first flange 306, which can realize the disassembly and upgrading of the load-bearing frame.

[0034] The longitudinal sliding of the primary sliding bearing frame 3 on the steel pipe slide rail 102 is to correct the longitudinal deviation caused by the positioning of the pile stabilization platform, and to bear the weight of the secondary sliding pile driving platform 4 and the construction load, which plays a key role in the quality of pile driving. Combination Figure 6The secondary sliding pile driving platform 4 consists of a platform frame 401, a grating plate 402, upper jacks 403, lower jacks 404, platform lifting lugs 405, a guide rotation mechanism 406, and guide holes 407. The grating plate 402 is laid on top of the platform frame 401, serving as the working surface. Upper jacks 403 and lower jacks 404 are symmetrically installed on both sides of the bottom of the platform frame 401 to adjust the levelness of the secondary sliding pile driving platform 4 and the verticality of the steel pipe piles. Platform lifting lugs 405 are welded to the top of the platform frame 401 for hoisting. Guide holes 407 are opened at the design positions of the steel pipe piles on the platform frame 401 for guiding and positioning the steel pipe piles. The guide rotation mechanism 406 is installed at the bottom of the platform frame 401 to adjust the azimuth angle of the secondary sliding pile driving platform 4, correcting angular deviations after the pile platform is in place, and fixing the secondary sliding pile driving platform 4, playing a crucial role in the quality of pile driving.

[0035] Combination Figure 7 and Figure 8 The guide rotation mechanism 406 consists of a rotating arm seat 4061, a rail clamp 4062, and a turning turnbuckle 4063. The rotating arm seat 4061 is fixed to the platform frame 401. The rail clamp 4062 is engaged with the steel slide rail 301 of the primary sliding bearing frame 3. The turning turnbuckle 403 connects the rotating arm seat 4061 and the bolt fulcrum 4064. The bolt fulcrum 4064 is fixed to the platform frame 401. By adjusting the turning turnbuckle 4063, the working platform can rotate around the arm seat fulcrum 4065 of the rotating arm seat 4061 to make fine adjustments to the azimuth angle.

[0036] The secondary sliding pile driving platform 4 relies on the guide rotation mechanism 406 to slide laterally on the steel slide rail 301, correcting the lateral deviation generated after the pile stabilization platform is in place, and bearing the load generated by the pile driving operation, which plays a key role in the quality of pile driving.

[0037] During lateral sliding, the locking state of the rail clamp 4062 is loosened, and the working platform can move laterally along the steel slide rail 301 to complete the lateral deviation correction; after sliding into place, the rail clamp 4062 is locked to fix the position, and then the azimuth angle of the working platform is adjusted by the directional turnbuckle 4063 of the guide rotation mechanism to achieve precise positioning.

[0038] Combination Figure 9 The longitudinal beam of the platform frame 401 is divided into two sections, which are connected by a second flange 408. When the longitudinal beam of the platform frame 401 needs to be lengthened, a second connecting beam 409 is added between the two sections. The two sections of the longitudinal beam are bolted to the two ends of the second connecting beam 409 by a second flange 408, which can realize the disassembly and upgrading of the work platform. The positioning steel pile 2 and the base support frame 1 are also connected by a suspension leveling device 5. Figure 10and Figure 11 The suspension leveling device 5 consists of a suspension turnbuckle 501 and a suspension wire rope 502, and is used in conjunction with the lower suspension lug 104 of the base support frame 1 and the upper suspension lug 202 of the positioning steel pile 2. Each positioning steel pile 2 is connected to the corresponding positioning guide tube 101 by two sets of suspension devices, that is, one end of the suspension wire rope 502 is connected to the lower suspension lug 104, and the other end is connected to the suspension turnbuckle 501. The other end of the suspension turnbuckle 501 is connected to the upper suspension lug 202. There are a total of 8 sets of suspension leveling devices. The horizontal adjustment of the base support frame 1 can be achieved by adjusting the length of the suspension turnbuckle 501.

[0039] The suspension turnbuckle 501, relying on the upper suspension lug 202 and the lower suspension lug 104, transfers the load of the base support frame 1 to the positioning steel pile 2. By adjusting the length of the suspension turnbuckle 501, the base support frame 1 is leveled, and the positioning steel pile 2 bears the load generated during the leveling process.

[0040] GPS antenna 6 is installed on the top of the secondary sliding pile driving platform 4 to locate the coordinates of the pile stabilization platform and the positioning steel pile 2 in real time, providing data support for precision adjustment. The detachable base-type multi-pile guiding and positioning stabilizing platform provided in this embodiment is operated with the help of an external lifting and lowering system.

[0041] Combination Figure 12 The external lifting and lowering system 7 consists of a crane vessel 701, a main hook 702, a platform lifting lock 703, a vibratory hammer lifting sling, a steel pipe pile lifting sling, and an impact hammer lifting sling. The crane vessel 701 serves as the main lifting equipment. The main hook 702 connects to the frame lifting lugs 304 of the primary sliding bearing frame 3 via the platform lifting lock 703, enabling the lifting, positioning, and dismantling of the entire pile stabilization platform 800. The vibratory hammer lifting sling, steel pipe pile lifting sling, and impact hammer lifting sling connect to the hydraulic vibratory hammer, the engineering steel pipe pile, and the hydraulic impact hammer, respectively, to complete the positioning of the steel piles, the lifting of the engineering steel pipe piles, and the hammer driving of the piles.

[0042] The pile driving process of the detachable base-type multi-pile guiding and positioning platform provided in this embodiment requires three-stage correction and positioning to achieve high-precision pile driving. The specific steps are as follows: Step 1: Construction Preparation and Platform Positioning. Based on construction requirements, assemble the base support frame 1, the primary sliding bearing frame 2, and the secondary sliding pile driving platform 4. For Type II foundation pile construction, upgrade, lengthen, and expand the primary sliding bearing frame 2 and the secondary sliding pile driving platform 4 using flanges and connecting beams. Using the crane vessel with the external lifting and lowering system 7, hoist the assembled pile stabilizing platform to the designed position above the pier. Guided by the GPS antenna 6, adjust the initial position of the platform to ensure the base support frame 1 is smoothly lowered onto the seabed, with the anti-sinking plate 107 in close contact with the seabed.

[0043] Step 2: Positioning steel pile driving and platform leveling. Using a crane vessel, a hydraulic vibratory hammer is hoisted, and four positioning steel piles 2 are inserted into the positioning guide tubes 101 of the base support frame 1. The hydraulic vibratory hammer is then activated to drive the positioning steel piles 2 into the seabed bearing layer. Subsequently, by adjusting the length of the suspension turnbuckles 501 of the suspension device 5 and using a level instrument for inspection, the base support frame 1 is leveled, ensuring the platform's levelness deviation is less than 0.4‰. The base support frame 1 and the positioning steel piles 2 are then fixed together using the suspension device 5 to prevent horizontal slippage of the platform. At this point, the initial positioning deviation of the stabilizing platform is controlled within 300mm in horizontal position and less than 2° in azimuth.

[0044] Step 3: First-level correction. Based on the platform position data re-measured by GPS antenna 6, adjust the longitudinal sliding of the primary sliding bearing frame 3 along the steel pipe slide rail 102 of the base support frame 1, so that the centroid of the steel pipe pile group coincides with the extended line of the north side of the centroid of the secondary sliding pile driving platform 4, and then lock the primary sliding bearing frame 3; then adjust the transverse sliding of the secondary sliding pile driving platform 4 along the steel slide rail 301 of the primary sliding bearing frame 3, so that the centroid of the secondary sliding pile driving platform 4 coincides with the centroid of the steel pipe pile group; finally, adjust the azimuth angle of the section of the secondary sliding pile driving platform 4 through the directional turnbuckle 4063 of the guide rotation mechanism 406, so that the guide hole on the secondary sliding pile driving platform 4 coincides with the design position of the corresponding steel pipe pile, and lock the section of the secondary sliding pile driving platform 4. After the first-level correction, the deviation between the center of the guide hole 407 and the design center of the steel pipe pile is less than 10mm.

[0045] Step 4: Steel Pipe Pile Hoisting and Insertion (Secondary Correction). The pile transport vessel berths with the crane vessel. After inspection and acceptance, the steel pipe piles are hoisted above the pile stabilization platform by the crane vessel and inserted into the guide hole 407 of the secondary sliding pile driving platform 4. Using upper jacks 403 and lower jacks 404 to push the steel pipe piles, and with the help of total station monitoring, the deviation between the center of the steel pipe pile and the design center is controlled to be less than 10mm, and the verticality is controlled to be within 0.5‰, completing the pile insertion and placement. At this time, the placement deviation of the steel pipe pile is less than 20mm.

[0046] Step 5: Pile Driving and Three-Stage Correction. A hydraulic impact hammer is hoisted to the top of the steel pipe pile using a crane vessel, and the hammer is activated to drive the pile. During the driving process, GPS antenna 6 and a total station monitor the verticality of the steel pipe pile in real time, controlling the verticality to not exceed 1‰. If tilting occurs, driving is paused, and the pile is corrected by pushing with upper and lower jacks until the accuracy requirements are met, then driving continues. After the steel pipe pile reaches the design elevation and passes a retest and acceptance test, the driving of a single steel pipe pile is completed. The above steps are repeated to complete the driving of all steel pipe piles.

[0047] Step 6: Platform dismantling and relocation. After all steel pipe piles have passed inspection, the positioning steel pile 2 is pulled out from the seabed using a hydraulic vibratory hammer and locked onto the bottom support frame 1. The entire pile stabilization platform is then hoisted to the deck for reinforcement using a crane vessel, and subsequently moved to the next construction site to complete one round of pile driving operations. The detachable, multi-pile guiding and positioning platform provided in this embodiment was applied to the pile driving construction of a six-pile pier foundation for a cross-sea bridge. The pier foundations are of two types: Type 1 consists of six Φ2.15m diameter composite piles, and Type 2 consists of six Φ2.35m diameter composite piles. The pile groups of both types have similar shapes, but the spacing between the steel pipe piles differs, with a total positional variation of 0.9m. The construction quality control standards are: allowable deviation of the pile top plane position at the design elevation is less than 50mm, allowable deviation of the pile tip elevation is less than 50mm, and the inclination of the steel pipe piles is less than 4‰. The construction area is located in a sea area with a depth of approximately -5.0m, and faces unfavorable conditions such as poor sea conditions, large tidal variations, and exposed seabed at certain times.

[0048] Type 1 Foundation Construction Assembly: The horizontal and diagonal braces of the base support frame are welded and fixed to the main frame body. The anti-sinking plate is welded to the bottom, and the positioning guide and steel pipe slide are fixed to the top. The ladder, railing, and corridor platform are welded into shape. The original version of the primary sliding bearing frame is used. The secondary sliding pile driving platform is assembled through the platform frame and internal components, without the need for upgrades, lengthening, or expansion. The GPS antenna is installed on the top of the working platform.

[0049] Type 2 Foundation Construction Upgrade: The first connecting beam of the primary sliding bearing frame is bolted to the frame crossbeam via the first flange to achieve lengthening; the second connecting beam of the secondary sliding pile driving platform is bolted to the platform frame via the second flange to achieve enlargement, so that the spacing of the guide holes can be adapted to the layout requirements of Φ2.35m composite piles.

[0050] The detachable, bottom-mounted, multi-pile guiding and positioning pile stabilizing platform provided in this embodiment can complete the pile driving construction of two types of bridge pier foundations. The completion deviation of each steel pipe pile meets the design requirements (position deviation ≤ 33.75 mm, verticality ≤ 2‰). It overcomes the influence of complex sea conditions and construction space limitations. The construction cycle of single bridge pier pile groups is shortened by 30% compared with traditional processes. The equipment reuse rate reaches 100%, which greatly reduces construction costs, eliminates quality risks, and verifies the practicality and reliability of the pile stabilizing platform of this application. It should be understood that although quantifiers such as "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit.

[0051] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the method of this application, and these improvements and additions should also be considered within the scope of protection of this invention. Any modifications, alterations, and equivalent variations made by those skilled in the art without departing from the spirit and scope of this application, based on the disclosed technical content, are equivalent embodiments of this application. Furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of this application still fall within the scope of the technical solution of this application.

Claims

1. A detachable seat bottom type multi-pile guide positioning pile stabilizing platform, characterized in that, Comprise: a seat bottom support frame for bearing the whole platform and sitting on the seabed; a positioning steel pile inserted on the seat bottom support frame and used for driving into the seabed to anchor the platform; a primary sliding bearing frame slidably mounted on the seat bottom support frame for realizing the deviation correction positioning of the platform along a first horizontal direction; a secondary sliding pile sinking operation platform slidably mounted on the primary sliding bearing frame for realizing the deviation correction positioning of the platform along a second horizontal direction perpendicular to the first horizontal direction, the secondary sliding pile sinking operation platform being provided with guide holes corresponding to the design positions of the pile group; and a suspension leveling device connected between the seat bottom support frame and the positioning steel pile for leveling and fixing the seat bottom support frame.

2. The detachable base type multi-pile guide positioning and stabilizing platform according to claim 1, wherein, The seat bottom support frame comprises a frame body, at least one pair of first sliding rails fixed on the top of the frame body, and an anti-sinking plate provided at the bottom of the frame body for increasing the seabed contact area.

3. The detachable base type multi-pile guide positioning and stabilizing pile platform according to claim 2, wherein, The seat bottom support frame further comprises positioning guide pipes vertically fixed on the four corners of the top thereof, and the positioning steel pile is inserted into the positioning guide pipes.

4. The detachable base type multi-pile guide positioning and stabilizing pile platform according to claim 2, wherein, The bottom of the primary sliding bearing frame is provided with first sliding blocks matched with the first sliding rails, and the top of the primary sliding bearing frame is provided with at least one pair of second sliding rails; the primary sliding bearing frame is of a modular structure, comprising at least two segments connected by detachable connecting members to realize the adjustment of the longitudinal dimension thereof.

5. The detachable base type multi-pile guide positioning and stabilizing pile platform according to claim 4, wherein, The bottom of the secondary sliding pile sinking operation platform is connected with the second sliding rails through a guide rotating mechanism; the guide rotating mechanism has a rail clamping device releasably locked on the second sliding rails, so that the secondary sliding pile sinking operation platform can slide along the second sliding rails and be locked at a predetermined position; the secondary sliding pile sinking operation platform is of a modular structure, comprising at least two segments connected by detachable connecting members to realize the expansion of the dimension and the adjustment of the distance between the guide holes.

6. The detachable base type multi-pile guide positioning and stabilizing pile platform according to claim 5, wherein, The guide rotating mechanism further comprises a rotating arm base fixed on the secondary sliding pile sinking operation platform, and a direction adjusting driving member connected between the rotating arm base and a fixed fulcrum, and the direction adjusting driving member can drive the secondary sliding pile sinking operation platform to make azimuth angle fine adjustment around the rotating arm base fulcrum.

7. The detachable base type multi-pile guide and positioning pile stabilization platform according to claim 6, wherein, The secondary sliding pile sinking operation platform is provided with retractable pushing members at positions corresponding to the guide holes, for making position and verticality fine adjustment of the steel pipe pile passing through the guide holes during the pile sinking process.

8. The detachable base type multi-pile guide and positioning pile stabilization platform according to claim 1, wherein, The suspension leveling device comprises a suspension steel wire rope and a suspension basket bolt, one end of the suspension steel wire rope is connected with a suspension lower lifting lug on the seat bottom support frame, the other end of the suspension steel wire rope is connected with the suspension basket bolt, the other end of the suspension basket bolt is connected with a suspension upper lifting lug on the positioning steel pile, and the length of the suspension basket bolt is adjusted to realize the levelness adjustment of the seat bottom support frame.

9. The detachable base type multi-pile guide and positioning pile stabilization platform according to claim 1, wherein, Further comprising a positioning measurement assembly for acquiring the spatial position information of the platform in real time, the positioning measurement assembly being mounted on the secondary sliding pile sinking operation platform.

10. A pile sinking method based on the detachable seat bottom type multi-pile guide positioning pile stabilization platform of claim 7, characterized in that, Comprise the following steps: primary positioning and fixing of the platform: the pile sinking platform is hoisted to the vicinity of the design position of the construction area, the positioning steel pile is driven, and the seat bottom support frame is leveled and fixed through the suspension leveling device; Primary deviation correction positioning: driving the primary sliding carrier frame to slide along a first horizontal direction, and driving the secondary sliding pile sinking operation platform to slide along a second horizontal direction, so that the group center of the guide holes coincides with the pile group design center of the steel pipe pile in the horizontal plane; Secondary deviation correction orientation: fine-tuning the azimuth angle of the secondary sliding pile sinking operation platform through the guide rotating mechanism, so that the azimuth of each guide hole is consistent with the design azimuth of the corresponding steel pipe pile; Steel pipe pile insertion and fine adjustment: hoisting the steel pipe pile and passing it through the corresponding guide hole, and then fine-tuning the position and perpendicularity of the steel pipe pile using the jacking piece, and then making it sink by itself; Dynamic pile sinking and tertiary deviation correction: during the hammering process, the attitude of the steel pipe pile is monitored in real time, and when the deviation trend of the perpendicularity or position of the steel pipe pile appears, the hammering is paused and the jacking piece is used for correction, and then the pile sinking continues to the design elevation.

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