A large-diameter single pile rapid pile sinking device

Abstract

The application discloses a large-diameter pile rapid sinking device for rapidly sinking a large-diameter pile, which comprises a base, a pile top pushing device, a pile side hydraulic linkage device, a servo water injection system and a CPTu geological detection system, wherein the pile top pushing device and the pile side hydraulic linkage device are both mounted on the base; the upper part of the large-diameter pile is connected with the pile top pushing device, and the large-diameter pile is lifted and lowered through the pile top pushing device; the lower part of the large-diameter pile is connected with the pile side hydraulic linkage device, and the large-diameter pile is laterally fixed through the pile side hydraulic linkage device; the servo water injection system is connected with the pile side hydraulic linkage device and is respectively used for injecting water under pressure; and the CPTu geological detection system is carried on the pile side hydraulic linkage device and is used for soil property testing and in-situ exploration of an in-situ geological seabed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seabed structure foundation construction and seabed geological engineering survey, and particularly relates to a large-diameter single pile rapid pile sinking device. BACKGROUND

[0002] In the process of coastal structure or offshore platform construction, the large-diameter single pile foundation is one of the most commonly used offshore platform and foundation forms.

[0003] However, in the process of offshore platform or coastal structure foundation construction, the seabed surface foundation is often subjected to long-term action of dynamic loads such as wave load, wind load, earthquake load, ship load and static water pressure and static load, and the foundation soil body becomes extremely dense, which brings great difficulty to the driving process of the large-diameter foundation and secondary reinforcement in the construction process. If larger construction equipment or construction load is used in the construction process, the disturbance of the surrounding soil body of the seabed foundation will be increased, which will have a great impact on the stability of the seabed foundation structure. Generally, the marine structure foundation and offshore platform foundation need to be consolidated for a period of time after construction before being used normally. If it is needed to be put into use earlier, additional equipment is needed to perform secondary reinforcement on the foundation structure. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a large-diameter single pile rapid pile sinking device to solve the problems of difficult foundation pile driving and installation of the large-diameter single pile in the dense seabed, the stability problem of softening of the surrounding soil body or liquefaction of the disturbed sand soil after installation, and the complicated steps of secondary reinforcement of the filled pile, and the difficulty in monitoring the on-site factual data in the pile sinking process.

[0005] According to the embodiment of the present application, a large-diameter pile rapid pile sinking device is provided for rapid pile sinking of the large-diameter pile, comprising: a base, a pile top pushing device, a pile side hydraulic linkage device, a servo water injection system, a CPTu geological detection system,

[0006] The pile top pushing device and the pile side hydraulic linkage device are both installed on the base;

[0007] The upper part of the large-diameter pile is connected with the pile top pushing device, and the large-diameter pile is lifted and lowered through the pile top pushing device;

[0008] The lower part of the large-diameter pile is connected with the pile side hydraulic linkage device, and the large-diameter pile is laterally fixed through the pile side hydraulic linkage device;

[0009] The servo water injection system is connected with the pile side hydraulic linkage device and is respectively used for pressure injection and water injection;

[0010] The CPTu geological detection system is mounted on the pile side hydraulic linkage device, and is used for soil property testing and in-situ exploration of an in-situ geological seabed.

[0011] Further, the reinforcing grouting equipment is connected with the pile side hydraulic linkage device, and is used for grouting reinforcement.

[0012] Further, the pile top pushing device comprises a diagonal brace fixing device, a stand column, a stand column auxiliary adjusting device, and a hoisting device for hoisting the large-diameter pile, the stand column is hinged to the base, the stand column auxiliary adjusting device is connected between the stand column and the base, the hoisting device is installed on the stand column, and the diagonal brace fixing device is fixed on the stand column and supports the sidewall of the large-diameter pile.

[0013] Further, the pile side hydraulic linkage device comprises a bottom fixing plate, an anti-tilting movable plate, a linkage shaft, and a linkage hydraulic pushing device, the lower part of the large-diameter pile is clamped by the bottom fixing plate and the anti-tilting movable plate, the bottom fixing plate is fixed on the base, the anti-tilting movable plate is fixedly connected with the hydraulic linkage shaft, a small hole is formed in the anti-tilting movable plate, and the small hole is connected with the servo water injection system and / or the reinforcing grouting equipment, and the linkage hydraulic pushing device drives the hydraulic linkage shaft, and is used for providing power for fixing and back-off of the sidewall of the large-diameter pile when the large-diameter pile is sunk and penetrated.

[0014] Further, the servo water injection system comprises a water supply centrifugal pump and a pressure acquisition device, the water supply centrifugal pump is fixed on the base, and is used for providing pumping power for water injection, the pressure acquisition device acquires real-time monitored pressure of the CPTu geological detection system, when the pressure is less than a first set threshold, water continues to be pumped by the water supply centrifugal pump, and when the pressure reaches a second set threshold, water injection is stopped.

[0015] Further, the reinforcing grouting equipment comprises a pumping grouting machine and a settlement acquisition device, the pumping grouting machine is fixed on the base, and is used for providing pumping power for cement mortar reinforcement liquid, when the large-diameter pile is penetrated and installed at a specified position, the settlement acquisition device acquires pile end settlement displacement detected by the CPTu geological detection system, and when the pile end settlement displacement is less than a first displacement threshold, secondary grouting reinforcement is started.

[0016] Further, the large-diameter pile is a prefabricated perforated pipe pile.

[0017] Further, the prefabricated multi-hole pipe pile comprises a pile body with embedded holes, a circumferential water / grouting pipe, a longitudinal water / grouting pipe, a one-way check valve and a pile shoe, the circumferential water / grouting pipe, the longitudinal water / grouting pipe and the one-way check valve are embedded in the pile body, one end of the circumferential water / grouting pipe is connected to the outer wall of the pile body, the other end is connected to the inner wall of the pile body and communicates with the longitudinal water / grouting pipe, one end of the longitudinal water / grouting pipe is connected to the top of the pile body, the other end is connected to the bottom of the pile body, the longitudinal water / grouting pipe is connected with the circumferential water / grouting pipe through the one-way check valve, and the pile shoe is connected with the bottom of the pile body and has a hole matching the bottom of the pile body.

[0018] Further, the CPTu geological detection system comprises a CPTu geological sounding device and a CPTu driving device for driving the CPTu geological sounding device to penetrate.

[0019] Further, a control unit is further included, the servo water injection system and the reinforcement grouting equipment are connected to the control unit, and the CPTu geological detection system is connected to the control unit.

[0020] The technical scheme provided by the embodiment of the application can have the following beneficial effects: As known from the above embodiment, in the construction process of a coastal structure or an offshore platform, the seabed surface foundation is often subjected to long-term action of dynamic loads such as wave load, wind load, earthquake load, ship load and static water pressure and static loads, so that the soil body of the foundation becomes extremely dense, which brings great difficulty to the penetration process of a large-diameter foundation and secondary reinforcement in the construction process. If larger construction equipment or construction load is used in the construction process, the disturbance of the surrounding soil body of the seabed foundation will be increased, which greatly affects the stability of the seabed foundation structure. The surrounding soil quality and the speed of pore pressure dissipation greatly affect the stability of the foundation in the construction process, therefore, an advanced CPTu detection method is used in the construction process to timely feedback the pore pressure dissipation response of the surrounding soil body of the foundation and the distribution of the change of the void ratio along the depth, so as to timely adjust the strength of the soil body around the pile by the servo water injection mode, which provides a convenient condition and basis for rapid piling and pile sinking. The application integrates rapid construction, timely monitoring, real-time feedback, servo control and secondary reinforcement, which greatly facilitates the construction application of a large-diameter single pile of a coastal structure foundation and provides great convenience for coastal structure construction and offshore platform construction.

[0021] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0023] Figure 1 Overall device front view shown in accordance with an exemplary embodiment;

[0024] Figure 2 Front elevation view shown in accordance with an exemplary embodiment;

[0025] Figure 3 Rear elevation view shown in accordance with an exemplary embodiment;

[0026] Figure 4 Left elevation view shown in accordance with an exemplary embodiment;

[0027] Figure 5 Right elevation view shown in accordance with an exemplary embodiment;

[0028] Figure 6 Plan view shown in accordance with an exemplary embodiment;

[0029] Figure 7 Elevation view shown in accordance with an exemplary embodiment;

[0030] Figure 8 Elevation view and plan view of a precast pipe pile shown in accordance with an exemplary embodiment;

[0031] Figure 9 Sectional view of a precast pipe pile shown in accordance with an exemplary embodiment;

[0032] Figure 10 Sectional detail view of a precast pipe pile check valve shown in accordance with an exemplary embodiment;

[0033] The reference signs in the figures are: base 1, pile top pushing device 2, pile side hydraulic linkage device 3, servo water injection system 4, reinforcement grouting equipment 5, prefabricated porous pipe pile 6, CPTu geological detection system 7, control unit 8, circumferential water injection / grouting pipe 9, longitudinal water injection / grouting pipe 10, one-way check valve 11, pile shoe 12, base bottom fixed plate 13, anti-tilt movable plate 14, linkage shaft 15, linkage hydraulic pushing device 16, CPTu vertical fixed plate 17, CPTu geological sounding device 18, instrument fixing device 19, inclined strut fixing device 20, base bottom outer frame 21, base connecting rod 22, base middle outer frame 23, electric hoist 24, steering fixed pulley 25, anchor-cable-pile body connector 26, movable connecting device 27, stand column 28, water supply centrifugal pump 29, pumping grouting machine 30, telescopic rod 31, pile body connecting cable 32, triangular support 33, CPTu left sliding way 34, CPTu right sliding way 35, CPTu fixed disc 36, CPTu penetrating device 37, connecting rod 38, movable pulley 39, pulley marker 40, anchor cable steering pulley 41, connecting piece 42. DETAILED DESCRIPTION

[0034] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the exemplary embodiments is intended to apply to any embodiment of the application, unless specifically stated otherwise. It is understood that the following description is not intended as a limitation on the application. Accordingly, the application is not limited to the specific embodiments described herein, but only by the claims and their equivalents. It is also understood that the terminology used herein is for the purpose of describing only the particular embodiments and is not intended to be limiting.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0036] Reference Figures 1-10The embodiment of the present application provides a large-diameter pile rapid sinking device for rapidly sinking the large-diameter pile, which comprises a base 1, a pile top pushing device 2, a pile side hydraulic linkage device 3, a servo water injection system 4, a CPTu geological detection system 7, the pile top pushing device 2 and the pile side hydraulic linkage device 3 are both installed on the base 1; the upper part of the large-diameter pile is connected with the pile top pushing device 2, and the large-diameter pile is lifted through the pile top pushing device 2; the lower part of the large-diameter pile is connected with the pile side hydraulic linkage device 3, and the large-diameter pile is fixed laterally through the pile side hydraulic linkage device 3; the servo water injection system 4 is connected with the pile side hydraulic linkage device 3 and is respectively used for injecting water under pressure; the CPTu geological detection system 7 is carried on the pile side hydraulic linkage device 3 and is used for soil property testing and in-situ exploration of an in-situ geological seabed, can synchronously monitor the soil body characteristics of the prefabricated multi-hole pipe pile in the penetration process and the excess pore water pressure generated due to the pile penetration process, and is used for judging the stability of the soil body. The pile top pushing device 2 and the pile side hydraulic linkage device 3 are used for providing downward penetration force and fixing the pile body position of the prefabricated multi-hole pipe pile in the pile penetration process. The servo water injection system 4 is used for pumping water and providing water pressure in the prefabricated multi-hole pipe pile penetration process, so as to reduce the frictional penetration resistance and soften the soil around the prefabricated pipe. The problems of the related art, such as the difficulty in foundation pile penetration when the large-diameter single pile is installed in a dense seabed, the stability problem of the surrounding soil softening or sand disturbance liquefaction after installation, the complicated steps in secondary reinforcement, and the difficulty in real-time data monitoring on site in the pile penetration process, are solved.

[0037] In an embodiment of the present application, the reinforcing grouting equipment 5 is connected with the pile side hydraulic linkage device 3 and is used for grouting reinforcement. When the prefabricated multi-hole pipe pile is penetrated, the reinforcing grouting equipment 5 can be connected with the hydraulic linkage device 3 to pump cement slurry for the prefabricated multi-hole pipe pile. The cement reinforcement slurry will penetrate through the prefabricated pipe hole and form a cement bond at the pile side and the pile bottom, so as to achieve the effect of secondary reinforcement.

[0038] In an embodiment of the present application, the base 1 comprises a base bottom outer frame 21, a base connecting rod 22 and a base middle outer frame 23, the base middle outer frame 23 and the base bottom outer frame 21 are fixedly connected through the base connecting rod 22. The mutual fixed connection between the base frames can be used for supporting the base top electric hoist 24 and the water supply centrifugal pump 29. And a platform support is provided for carrying the CPTu geological detection system 7.

[0039] In an embodiment of the present application, the pile jacking device 2 comprises: a diagonal bracing fixing device 20, a stand column 28, a stand column auxiliary adjusting device 33, a hoisting device for hoisting the large-diameter pile, the stand column 28 is hinged to the base 1, the stand column auxiliary adjusting device 33 is connected between the stand column 28 and the base 1, and is used for adjusting the inclination of the stand column; the hoisting device is installed on the stand column 28, the diagonal bracing fixing device 20 is fixed on the stand column 28 and supports the side wall of the large-diameter pile. The pile jacking device can be used to provide certain positioning and jacking force during the jacking of the prefabricated multi-hole hollow pipe pile.

[0040] Further, the hoisting device comprises an electric hoist 24, a pile body connecting cable 32, a turning fixed pulley 25, and an anchor cable-pile body connector 26, the turning fixed pulley 25 is installed at the top of the stand column 28, the anchor cable-pile body connector 26 is installed at the top of the large-diameter pile, one end of the pile body connecting cable 32 is fixedly connected with the electric hoist 24, and the other end is fixedly connected with the anchor cable-pile body connector 26 after passing through the turning fixed pulley 25 in sequence. The electric hoist 24 can be fixed on the base 1. The hoisting device can be used to hoist the prefabricated multi-hole hollow pipe pile to a preset fixed position on site.

[0041] Further, the stand column auxiliary adjusting device 33 comprises a telescopic rod assembly 31 and a triangular support 33, the triangular support 33 is fixed on the stand column 28, and the telescopic rod assembly 31 connects the triangular support 33 and the base 1, and is used for adjusting the inclination of the stand column. Specifically, the telescopic rod assembly 31 mainly consists of three telescopic rods with different lengths. The stand column auxiliary adjusting device is used for fixing and supporting the stand column 28 to prevent excessive deformation and twisting of the stand column 28.

[0042] Further, a pulley card marker 40 is further included, the pulley card marker 40 is hinged to the stand column 28 and connected with the anchor cable-pile body connector 26, and can be used to measure the sinking depth of the pile body.

[0043] Further, an anchor cable turning pulley 41 is further included, the anchor cable turning pulley 41 is installed in the middle of the stand column 28, and the other end of the pile body connecting cable 32 is fixedly connected with the anchor cable-pile body connector 26 after passing through the turning fixed pulley 25 in sequence. The anchor cable turning pulley 41 is used for fixing the anchor cable on the stand column 28 and providing a fulcrum point when the anchor cable is tensioned and loosened.

[0044] In an embodiment of the present application, the pile side hydraulic linkage device 3 comprises a bottom fixed plate 13, an anti-tilting movable plate 14, a linkage shaft 15, and a linkage hydraulic propulsion device 16. The lower part of the large-diameter pile is clamped by the bottom fixed plate 13 and the anti-tilting movable plate 14. The bottom fixed plate 13 is fixed to the base 1. The anti-tilting movable plate 14 is fixedly connected with the hydraulic linkage shaft 15. The anti-tilting movable plate 14 is provided with a small hole for connecting with the servo water injection system 4 and / or the reinforcement grouting equipment 5. The linkage hydraulic propulsion device 16 drives the hydraulic linkage shaft 15 to provide power during the sinking process of the pile body. The pile side hydraulic linkage device 3 is used to provide power for the fixation and retraction of the sidewall of the large-diameter prefabricated hollow pipe pile when the large-diameter pile is sinking and penetrating.

[0045] In an embodiment of the present application, the CPTu geological detection system 7 comprises a CPTu geological sounding device 18 and a CPTu penetration device 37 for driving the CPTu geological sounding device 18 to penetrate. The CPTu geological detection system 7 is used for soil property testing and in-situ exploration of the in-situ geological seabed, can synchronously monitor the soil property in the penetration process of the prefabricated multi-hole pipe pile and the excess pore water pressure generated due to the pile penetration process, and is used for determining the stability of the soil.

[0046] Specifically, the CPTu penetration device 37 comprises a CPTu vertical fixed plate 17, a CPTu geological sounding device 18, a CPTu left slide 34, a CPTu right slide 35, a CPTu fixed disc 36, and a connecting rod 38. One side of the CPTu vertical fixed plate 17 is fixed to the CPTu and the connecting rod 38, and the other side is provided with the CPTu left slide 34 and the CPTu right slide 35. The CPTu fixed disc 36 is connected with the CPTu penetration device 37 in the middle and can slide up and down. The CPTu vertical fixed plate 17 and the connecting rod 38 fix the entire CPTu geological detection system 7 on the base 1. The CPTu left slide 34 and the CPTu right slide 35 can be used to greatly adjust the penetration depth of the CPTu, and the CPTu fixed disc 36 can be used to slightly adjust the penetration depth of the CPTu. The CPTu penetration device 37 is used to provide penetration power for the CPTu in the CPT penetration process. The CPTu geological detection system 7 is used for soil property testing and in-situ exploration of the in-situ geological seabed, can synchronously monitor the soil property in the penetration process of the prefabricated multi-hole pipe pile and the excess pore water pressure generated due to the pile penetration process, and is used for determining the stability of the soil.

[0047] In an embodiment of the present application, the servo water injection system 4 comprises a water supply centrifugal pump 29 and a pressure acquisition device. The water supply centrifugal pump 29 is fixed on the base 1 and used to provide pumping power for water injection. The pressure acquisition device acquires the pressure monitored by the CPTu geological detection system 7 in real time. When the pressure is less than a first set threshold, the water continues to be pumped by the water supply centrifugal pump 29. When the pressure reaches a second set threshold, the water injection is stopped. The servo water injection system 4 is used to provide the required water pressure for the pile body during penetration and to provide pumping power for water injection.

[0048] In an embodiment of the present application, the reinforcement grouting device 5 comprises a pumping grouting machine 30 and a settlement acquisition device. The pumping grouting machine 30 is fixed on the base 1 and used to provide pumping power for the cement mortar reinforcement liquid. When the large-diameter pile is installed at a designated position, the settlement acquisition device acquires the pile end settlement displacement detected by the CPTu geological detection device 18. When the pile end settlement displacement is less than a first displacement threshold, the secondary grouting reinforcement is started. The reinforcement grouting device 5 is used to pump the cement mortar for the prefabricated multi-hole pipe pile. During pumping, the cement reinforcement slurry will pass through the holes of the prefabricated pipe to form a cement bond at the pile side and the pile bottom, thereby achieving the effect of stable secondary reinforcement.

[0049] In an embodiment of the present application, the large-diameter pile is a prefabricated multi-hole pipe pile 6. The holes reserved on the prefabricated multi-hole pipe pile ensure the smooth progress of water injection and secondary reinforcement.

[0050] In an embodiment of the present application, the prefabricated multi-hole pipe pile 6 comprises a pile body with embedded holes, a circumferential water / grouting pipe 9, a longitudinal water / grouting pipe 10, a one-way check valve 11, and a pile shoe 12. The circumferential water / grouting pipe 9, the longitudinal water / grouting pipe 10, and the one-way check valve 11 are embedded in the pile body, and the number of embedded holes is determined according to the requirement. One end of the circumferential water / grouting pipe 9 is connected to the outer wall of the pile body, and the other end is connected to the inner wall of the pile body and communicates with the longitudinal water / grouting pipe 10. One end of the longitudinal water / grouting pipe 10 is connected to the top of the pile body, and the other end is connected to the bottom of the pile body. The longitudinal water / grouting pipe 10 and the circumferential water / grouting pipe 9 are connected through the one-way check valve 11, which ensures the flow of the pipes and makes the water flow smoothly downward and laterally. The one-way check valve 11 embedded in the pipe ensures that the water flow / sand slurry only flows downward and laterally, but not backflow due to pressure. The pile shoe 12 is connected to the bottom of the pile body and has a hole that fits the bottom of the pile body. The pile shoe 12 can protect the pile foundation and reduce the penetration resistance when the prefabricated pile penetrates. The holes reserved on the prefabricated multi-hole pipe pile ensure the smooth progress of water injection and secondary reinforcement.

[0051] In an embodiment of the present application, a control unit 8 is further included, the servo water injection system 4 and the reinforcement grouting device 5 are connected to the control unit 8, and the CPTu geological detection system 7 is connected to the control unit 8. The control unit 8 is used to collect the pressure data of the CPTu geological detection system 7 in real time during the penetration of the prefabricated multi-hole pipe pile, and to control the servo water injection system 4.

[0052] The construction steps are as follows:

[0053] A. Prefabrication of large-diameter multi-hole hollow pipe pile. As shown in Figure 7 Fig. 1 is a top view and a side view of a large-diameter prefabricated multi-hole hollow pipe pile. Eight equidistant water injection and grouting holes are prefabricated in the large-diameter prefabricated multi-hole hollow pipe pile; the holes are connected to each other in the upper and lower and the side wall holes. A prefabricated buried pipe check valve is installed at each vertical and side wall connection, which only allows water flow or grouting liquid to flow downward in one direction. If the water flow or grouting liquid flows downward due to pressure, the internal valve of the check valve will open due to water pressure; if it flows upward due to pressure, the valve will automatically close upward. The top of the multi-hole hollow prefabricated pipe pile is embedded with a screw thread to facilitate connection with the pile top anchor-cable-pile connector.

[0054] B. Installation of pile shoe of large-diameter multi-hole pipe pile. As shown in Figure 8 A prefabricated bottom pile shoe is installed at the bottom of the pile, and the pile shoe is a prefabricated multi-hole rigid circular ring with a clamping groove and a screw thread at the upper part to facilitate installation with the pile side wall. The circular hole is connected to the eight grouting holes of the pile side wall.

[0055] C. Installation of pile top anchor-cable-pile connector. The anchor cable turning pulley of the device is loosened, and the anchor-cable-pile connector is connected with the embedded screw thread at the top of the pile.

[0056] D. Positioning and pile lifting of large-diameter multi-hole prefabricated pipe pile. The large-diameter multi-hole prefabricated pipe pile is positioned at the specified construction location, and then the anchor-cable-pile connector is lifted into position with the pile using a hydraulic jack;

[0057] E. Side wall fixation of large-diameter multi-hole prefabricated pipe pile. The pile side hydraulic linkage pushing device is pushed into position, and holes are opened in the pile side anti-tilting movable plate connected to the device, which are connected to the servo water injection pipeline. The water injection pipeline is connected to a water pressure gauge and a water supply centrifugal pump, which can serve to servo water injection according to the pressure in the hole.

[0058] F. Connection of side wall water injection hole of large-diameter multi-hole prefabricated pipe pile. The water supply pressure gauge and the water supply centrifugal pump are turned on, the pressure in the pipe is detected, and the pressure is stabilized at a fixed threshold value. When the pressure is less than the threshold value, the water injection is automatically started; when the pressure is greater than the threshold value, the valve is closed to stop water injection. The increase of water pressure will cause liquefaction and other phenomena in the lower dense soil, greatly facilitating the penetration of the multi-hole prefabricated pipe pile.

[0059] G. Retracting the hydraulic linkage of the pile side to the in-place position. The hydraulic linkage of the pile side is retracted to the in-place position, and the movable anti-tilting plate connected to the hydraulic linkage of the pile side is also retracted, so that the pile side wall is no longer restricted, providing a basis for the next step of hydraulic penetration.

[0060] H. Hydraulic penetration of the large-diameter pipe pile. The hydraulic penetration device at the top of the pile pushes the prefabricated pipe pile to the specified depth. Due to the action of water pressure, the side friction and end resistance of hydraulic penetration can be greatly reduced.

[0061] Repeat the above steps (E) to (H) until the pile is completely penetrated to the specified elevation.

[0062] Secondary reinforcement of the large-diameter perforated prefabricated pipe pile. After the pile is penetrated, the hydraulic linkage of the pile side is pushed to the in-place position. Holes are opened in the movable anti-tilting plate connected to the hydraulic linkage of the pile side, the pipes around the holes are pulled out and replaced with grouting pipes, and the grouting pipes are connected to the cement mortar mixing and pumping machine to perform secondary grouting reinforcement.

[0063] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application cover any and all variations of the application that come within the scope of the general concept of the application and that the claims be construed to cover any such variations as fall within the scope of the application. It is submitted that the specification and examples are illustrative of organizational structures solely and are not intended to limit the true scope and spirit of the application as defined by the claims.

[0064] It is to be understood that the application is not limited to the precise construction described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be defined by the claims appended hereto.

Claims

1. A rapid pile driving device for large-diameter piles, used for rapidly driving large-diameter piles, characterized in that, include: The components include: (1) foundation, (2) pile top propulsion device, (3) pile side hydraulic linkage device, (4) servo water injection system, and (7) CPTu geological exploration system; among which: The pile top propulsion device (2) and the pile side hydraulic linkage device (3) are both installed on the base (1); The upper part of the large-diameter pile is connected to the pile top propulsion device (2), and the large-diameter pile is raised and lowered through the pile top propulsion device (2); The lower part of the large-diameter pile is connected to the pile-side hydraulic linkage device (3), and the lateral fixation of the large-diameter pile is achieved through the pile-side hydraulic linkage device (3); The servo water injection system (4) is connected to the pile-side hydraulic linkage device (3) and is used for pressurizing and adding water respectively; The CPTu geological exploration system (7) is mounted on the pile-side hydraulic linkage device (3) and is used to conduct soil property testing and in-situ exploration of the in-situ geological seabed. The servo water injection system (4) includes: a water supply centrifugal pump (29) and a pressure acquisition device. The water supply centrifugal pump (29) is fixed on the base (1) and is used to provide pumping power for water injection. The pressure acquisition device acquires the pressure monitored in real time by the CPTu geological exploration system (7). When the pressure is less than the first set threshold, water continues to be pumped through the water supply centrifugal pump (29). When the pressure reaches the second set threshold, water injection stops. The device also includes a reinforcement grouting device (5), which is connected to the pile side hydraulic linkage device (3) for grouting reinforcement. The reinforcement grouting device (5) includes a pump grouting machine (30) and a settlement acquisition device. The pump grouting machine (30) is fixed on the base (1) and is used to provide pumping power for cement mortar reinforcement liquid. When the large-diameter pile is driven into the designated position, when the settlement acquisition device collects the pile end settlement displacement detected by the CPTu geological detection system (7) which is less than the first displacement threshold, the secondary grouting reinforcement begins.

2. The rapid pile driving device for large-diameter piles according to claim 1, characterized in that, The pile top advancing device (2) includes: a diagonal bracing fixing device (20), a column (28), a column auxiliary adjustment device (33), and a hoisting device for hoisting the large-diameter pile. The column (28) is hinged to the base (1). The column auxiliary adjustment device (33) is connected between the column (28) and the base (1). The hoisting device is installed on the column (28). The diagonal bracing fixing device (20) is fixed on the column (28) and supports the side wall of the large-diameter pile.

3. The rapid pile driving device for large-diameter piles according to claim 1, characterized in that, The pile-side hydraulic linkage device (3) includes: a bottom fixed plate (13), an anti-tilting movable plate (14), a linkage shaft (15), and a linkage hydraulic propulsion device (16); the lower part of the large-diameter pile is clamped by the bottom fixed plate (13) and the anti-tilting movable plate (14), the bottom fixed plate (13) is fixed on the base (1), the anti-tilting movable plate (14) is fixedly connected to the linkage shaft (15), the anti-tilting movable plate (14) has a small hole, the small hole is used to connect to the servo water injection system (4) and / or the reinforcement grouting equipment (5); the linkage hydraulic propulsion device (16) drives the linkage shaft (15) to provide power for fixing and retracting the side wall of the large-diameter pile when the large-diameter pile sinks and penetrates.

4. The rapid pile driving device for large-diameter piles according to claim 1, characterized in that, The large-diameter pile is a precast multi-hole pipe pile (6).

5. The rapid pile driving device for large-diameter piles according to claim 4, characterized in that, The precast multi-hole pipe pile (6) includes: a pile body with pre-embedded holes, a circumferential water injection / grouting pipe (9), a longitudinal water injection / grouting pipe (10), a one-way check valve (11), and a pile shoe (12). The circumferential water injection / grouting pipe (9), the longitudinal water injection / grouting pipe (10), and the one-way check valve (11) are pre-embedded in the pile body. One end of the circumferential water injection / grouting pipe (9) is connected to the outer wall of the pile body, and the other end is connected to the inner wall of the pile body and is connected to the longitudinal water injection / grouting pipe (10). One end of the longitudinal water injection / grouting pipe (10) is connected to the top of the pile body, and the other end is connected to the bottom of the pile body. The longitudinal water injection / grouting pipe (10) and the circumferential water injection / grouting pipe (9) are connected by a one-way check valve (11). The pile shoe (12) is connected to the bottom of the pile body and has a hole that fits the bottom of the pile body.

6. The rapid pile driving device for large-diameter piles according to claim 1, characterized in that, The CPTu geological exploration system (7) includes: a CPTu geological penetration device (18) and a CPTu penetration device (37) for driving the CPTu geological penetration device (18) to penetrate.

7. The rapid pile driving device for large-diameter piles according to claim 1, characterized in that, It also includes a control unit (8), the servo water injection system (4) and the reinforcement grouting equipment (5) are connected in parallel to the control unit (8), and the CPTu geological exploration system (7) is connected to the control unit (8).

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