Bottom-supported positioning frame and four-pile jacket foundation pile sinking method

Abstract

The invention discloses a bottom-supported positioning frame and a four-pile jacket foundation pile sinking method.The bottom-supported positioning frame comprises an upper barrel and a lower anti-sinking plate, the upper end and the lower end of the upper barrel are provided with an upper horn mouth and a lower horn mouth respectively, and the lower anti-sinking plate is provided with a guide opening corresponding to the lower horn mouth; the bottom-supported positioning frame and an underwater foundation pile can be conveniently aligned and sleeved, a pile feeder can be conveniently inserted into the upper cylinder for operation through the upper horn mouth, the secondary positioning precision and efficiency of the bottom-supported positioning frame are improved, the lower anti-settling plate makes contact with the mud surface, and the anti-settling effect is good. Accordingly, the position can be fixed through structural cooperation and self weight of the upper barrel and the lower anti-sinking plate, the perpendicularity of underwater foundation pile construction is guaranteed, the positioning precision is improved, the bottom-sitting type positioning frame can be prevented from sinking into sludge too deep due to the design of the lower anti-sinking plate, and compared with a traditional positioning frame, the positioning frame has the advantages of being simple in structure and convenient to use. Auxiliary pile sinking for fixing the position of the positioning frame is not needed, so that the field construction efficiency is improved, and the construction cost is effectively controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and particularly relates to a bottom-sitting positioning frame and a method for driving foundation piles of a four-pile jacket foundation. Background Art

[0002] The four-pile jacket foundation for offshore wind power is a relatively common foundation form in China at present. The geological conditions of the construction sea area are complex, and the offshore environment is harsh and difficult to predict. During the construction process, it is difficult to drive the foundation piles to the designed elevation, and there is a situation of secondary driving construction. Generally, a positioning frame is used for secondary positioning. Since the foundation piles are located below the water surface, the secondary positioning is difficult, and it is difficult to ensure the verticality of the underwater foundation pile construction, which affects the construction quality. Moreover, affected by natural factors such as waves and swells, the construction risk is high and the cost is difficult to control. In addition, the traditional positioning frame also needs to drive auxiliary piles to fix the position of the positioning frame, resulting in low construction efficiency. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a bottom-sitting positioning frame, which can reduce the difficulty of secondary positioning, ensure the verticality of underwater foundation pile construction, and improve the construction efficiency and quality.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: A bottom-sitting positioning frame includes an upper cylinder and a lower anti-settlement plate. The upper and lower ends of the upper cylinder are respectively provided with an upper bell mouth and a lower bell mouth. The lower anti-settlement plate is connected to the lower end of the upper cylinder, and the lower anti-settlement plate is provided with a guiding opening corresponding to the lower bell mouth. When sleeving the pile, the bottom-sitting positioning frame is sleeved outside the foundation pile through the guiding opening of the lower anti-settlement plate and the lower bell mouth, and the lower anti-settlement plate contacts the mud surface.

[0005] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0006] 1. The bottom-sitting positioning frame of the present invention includes an upper cylinder. The upper and lower ends of the upper cylinder are respectively provided with an upper bell mouth and a lower bell mouth. The lower bell mouth can facilitate the alignment of the bottom-sitting positioning frame with the underwater foundation pile and the insertion of the bottom-sitting positioning frame onto the foundation pile. The upper bell mouth can facilitate the insertion of the pile driver into the upper cylinder for operation, improve the secondary positioning accuracy and efficiency of the bottom-sitting positioning frame, and the upper cylinder is a sleeve structure, which can effectively fix the pile driver and improve the energy transfer efficiency;

[0007] 2. The structure of the bottom-sitting positioning frame of the present invention is simple, light in weight and the strength can meet the requirements of foundation pile driving construction. It can adopt the structural form of single-pile positioning, reducing the difficulty of four-pile secondary synchronous positioning of the traditional positioning frame;

[0008] 3. After the bottom-supported positioning frame is sleeved onto the foundation pile, the upper cylinder of the sleeve structure is sleeved outside the foundation pile, while the lower anti-settlement plate contacts the mud surface. Thus, the fixed position can be achieved by the cooperation of the bottom-supported structure of the upper cylinder and the lower anti-settlement plate and its own weight, ensuring the verticality of the underwater foundation pile construction, improving the positioning accuracy, and the design of the lower anti-settlement plate can prevent the bottom-supported positioning frame from sinking too deep into the silt. Compared with the traditional positioning frame, there is no need to drive auxiliary piles to fix the position of the positioning frame, improving the on-site construction efficiency and effectively controlling the construction cost.

[0009] For the above-mentioned bottom-supported positioning frame, a diagonal brace is connected between the upper cylinder and the lower anti-settlement plate.

[0010] For the above-mentioned bottom-supported positioning frame, multiple diagonal braces are circumferentially distributed.

[0011] For the above-mentioned bottom-supported positioning frame, the lower anti-settlement plate includes a base and a plate body laid in the base.

[0012] For the above-mentioned bottom-supported positioning frame, the base is welded by I-beams and connected and reinforced with channel steel and angle steel in the middle.

[0013] For the above-mentioned bottom-supported positioning frame, the plate body is a diamond plate, and a plurality of through holes are formed in the diamond plate.

[0014] The present invention also provides a method for driving the foundation piles of a four-pile jacket. The above-mentioned bottom-supported positioning frame is used for secondary positioning, including the following steps:

[0015] Step S100: The crane vessel anchors for positioning;

[0016] Step S200: Lift and install the bottom-supported positioning frame;

[0017] Step S300: Lift and install the pipe ramming adapter and the hydraulic hammer;

[0018] Step S400: Ram the pile.

[0019] The above pile driving method uses the above-mentioned bottom-supported positioning frame for secondary positioning, which can reduce the difficulty of four-pile secondary synchronous positioning of the traditional positioning frame, ensure the verticality of the underwater foundation pile driving construction, and improve the construction efficiency and quality.

[0020] For the above-mentioned method for driving the foundation piles of a four-pile jacket, step S200 includes the following steps:

[0021] Step S210: The crane vessel lifts the bottom-supported positioning frame, and the relative position relationship between the bottom-supported positioning frame and the foundation pile is monitored in real time through the GPS positioning system;

[0022] Step S220: Slowly lower the bottom - sitting positioning frame to the top of the foundation pile. The diver enters the water to assist in the pile - sleeving work of the bottom - sitting positioning frame. Sleeve the bottom - sitting positioning frame outside the foundation pile through the guiding opening of the lower anti - sinking plate and the lower bell mouth until the lower anti - sinking plate contacts the mud surface, and ensure that the top of the upper bell mouth and the diagonal braces are above the top of the foundation pile.

[0023] For the above - mentioned method of driving the foundation piles of the four - pile jacket, step S300 includes the following steps:

[0024] Step S310: Use the main hook of the crane ship to lift the hydraulic hammer, and use the auxiliary hook to hang the balance beam of the pipe - jacking device to lift the pipe - jacking device.

[0025] Step S320: Rotate the boom of the crane ship to send the pipe - jacking device above the bottom - sitting positioning frame. Slowly lower the pipe - jacking device according to the display of the GPS positioning system. At the same time, the diver conducts auxiliary command for the pipe - jacking of the pipe - jacking device underwater to complete the pipe - jacking of the pipe - jacking device.

[0026] Step 330: Adjust the angle of the boom of the crane ship and sleeve the hydraulic hammer to the top of the pipe - jacking device.

[0027] For the above - mentioned method of driving the foundation piles of the four - pile jacket, step S400 includes the following steps:

[0028] Step S410: Start the hydraulic hammer. First, use a small energy for pile driving by hammering, and then gradually increase the energy until the foundation pile is driven to the design elevation.

[0029] Step S420: Send the hydraulic hammer and the pipe - jacking device back to the deck of the crane ship. Lift the bottom - sitting positioning frame and move the ship to the next foundation pile, and successively complete the driving of the remaining three foundation piles.

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the front view of the bottom - sitting positioning frame of the embodiment of the present invention;

[0032] Figure 2 It is the top view of the bottom - sitting positioning frame of the embodiment of the present invention;

[0033] Figure 3 It is the schematic diagram when the crane ship is anchored and positioned in the embodiment of the present invention;

[0034] Figure 4 It is the schematic diagram when the bottom - sitting positioning frame is lifted and installed in the embodiment of the present invention;

[0035] Figure 5 It is the schematic diagram when the pipe - jacking device and the hydraulic hammer are lifted in the embodiment of the present invention;

[0036] Figure 6 Schematic diagram of the pile feeder and hydraulic hammer installation in the embodiment of the present invention;

[0037] Figure 7 Cooperation relationship diagram of the bottom - sitting positioning frame, foundation pile and pile feeder in the embodiment of the present invention;

[0038] Figure 8 Schematic diagram of the hydraulic pile sinking in place in the embodiment of the present invention.

[0039] Explanation of the reference numerals in the drawings: 100 bottom - sitting positioning frame, 110 upper cylinder, 111 upper bell mouth, 112 lower bell mouth, 120 lower anti - sinking plate, 130 diagonal brace, 200 pile feeder, 300 hydraulic hammer. Detailed implementation manners

[0040] The following details the embodiments of the present invention

[0041] Embodiment 1

[0042] Referring to Figure 1 and Figure 2 , Embodiment 1 of the present invention provides a bottom - sitting positioning frame 100, which includes an upper cylinder 110 and a lower anti - sinking plate 120. The upper and lower ends of the upper cylinder 110 are respectively provided with an upper bell mouth 111 and a lower bell mouth 112. The lower anti - sinking plate 120 is connected to the lower end of the upper cylinder 110, and the lower anti - sinking plate 120 is provided with a guiding port corresponding to the lower bell mouth 112. When sleeving the pile, the bottom - sitting positioning frame 100 is sleeved outside the foundation pile through the guiding port of the lower anti - sinking plate 120 and the lower bell mouth 112, and the lower anti - sinking plate 120 contacts the mud surface.

[0043] The beneficial effects of the present invention are as follows:

[0044] 1. The bottom - sitting positioning frame 100 of the present invention includes an upper cylinder 110. The upper and lower ends of the upper cylinder 110 are respectively provided with an upper bell mouth 111 and a lower bell mouth 112. The lower bell mouth 112 can facilitate the alignment of the bottom - sitting positioning frame 100 with the underwater foundation pile and the insertion of the bottom - sitting positioning frame 100 onto the foundation pile. The upper bell mouth 111 can facilitate the insertion of the pile feeder 200 into the upper cylinder 110 for operation, improving the secondary positioning accuracy and efficiency of the bottom - sitting positioning frame 100. Moreover, the upper cylinder 110 is a sleeve structure, which can effectively fix the pile feeder 200 and improve the energy transfer efficiency;

[0045] 2. The structure of the bottom - sitting positioning frame 100 of the present invention is simple, light in weight, and its strength can meet the requirements of the foundation pile sinking construction. It can adopt the structural form of single - pile positioning, reducing the difficulty of the four - pile secondary synchronous positioning of the transmission positioning frame;

[0046] 3. After the 100 bottom-supported positioning frames are sleeved onto the foundation piles, the upper cylinder 110 of the sleeve structure is sleeved outside the foundation piles, while the lower anti-settlement plate 120 contacts the mud surface. Thus, the bottom-supported structure of the upper cylinder 110 and the lower anti-settlement plate 120 can be used in combination with its own weight to fix the position, ensure the verticality of the underwater foundation pile construction, improve the positioning accuracy, and the design of the lower anti-settlement plate 120 can prevent the bottom-supported positioning frame 100 from sinking too deep into the silt. Compared with the traditional positioning frame, there is no need to drive auxiliary piles to fix the position of the positioning frame, which improves the efficiency of on-site construction and effectively controls the construction cost.

[0047] Further, the total height of the upper cylinder 110 is about 22m, and the main materials of the upper bell mouth 111 and the lower bell mouth 112 are circular steel pipes. The lower anti-settlement plate 120 includes a base and a plate body laid in the base. The base is welded by I-beams. For example, an I-beam is welded into a square structure with a diameter of 14m×14m as the base, and channels and angle steels are used for connection and reinforcement in the middle to meet the strength required for the construction of the bottom-supported positioning frame 100. Patterned steel plates with a thickness of about 8mm are used both above and below the I-beams as the plate body of the lower anti-settlement plate 120 to lay the part except for the reserved guiding ports, and a plurality of through holes are opened on the patterned steel plates to reduce the adsorption force of the anti-settlement plate.

[0048] Further, a diagonal brace 130 is connected between the upper cylinder 110 and the lower anti-settlement plate 120. A plurality of diagonal braces 130 are circumferentially distributed, for example, 8. When sleeving the pile, the connection position between the top of the foundation pile and the pile driver 200 is below the top of the diagonal brace 130, which can increase the balance and strength of the bottom-supported positioning frame 100 during pile driving, ensure the verticality of the underwater foundation pile construction, and improve the positioning accuracy.

[0049] Embodiment 2

[0050] Embodiment 2 of the present invention provides a method for driving foundation piles of a four-pile jacket foundation, which uses the above-mentioned bottom-supported positioning frame 100 for secondary positioning, and includes the following steps:

[0051] Step S100: The crane ship anchors for positioning:

[0052] Referring to Figure 3 , the crane ship sails to the vicinity of the machine position through the "marine remote GPS pile driving positioning system" for anchoring and positioning to complete the positioning work.

[0053] Step S200: Lift and install the bottom-supported positioning frame 100. Referring to Figure 4 , it includes the following steps:

[0054] Step S210: The crane vessel uses the main hook to suspend two steel wire ropes to connect the top of the submersible positioning frame 100, lift the submersible positioning frame 100, and use the GPS positioning system to monitor the relative position relationship between the submersible positioning frame 100 and the foundation pile in real time;

[0055] Step S220: Slowly lower the submersible positioning frame 100 to the top of the foundation pile. The diver goes into the water to assist in the pile-sleeving work of the submersible positioning frame 100. Sleeve the submersible positioning frame 100 outside the foundation pile through the guiding port of the lower anti-settlement plate 120 and the lower bell mouth 112 until the lower anti-settlement plate 120 contacts the mud surface, and make the top of the upper bell mouth 111 and the diagonal bracing rod 130 be above the top of the foundation pile. After completing the installation work of the submersible positioning frame 100, the diver goes into the water to release the sling of the submersible positioning frame 100.

[0056] Step S300: Lift and install the pipe ramming adapter 200 and the hydraulic hammer 300, referring to Figures 5 to 7 , including the following steps:

[0057] Step S310: The rotating boom of the crane vessel returns to the deck. Use the main hook to lift the hydraulic hammer 300, and use the auxiliary hook to suspend the balance beam of the pipe ramming adapter 200 to lift the pipe ramming adapter 200;

[0058] Step S320: Rotate the boom of the crane vessel to send the pipe ramming adapter 200 above the submersible positioning frame 100. Slowly lower the pipe ramming adapter 200 according to the display of the GPS positioning system. At the same time, the diver conducts auxiliary command for the pipe ramming of the pipe ramming adapter 200 underwater. After completing the pipe ramming of the pipe ramming adapter 200, keep the sling of the pipe ramming adapter 200 in a slack state;

[0059] Step 330: Adjust the angle of the boom of the crane vessel and sleeve the hydraulic hammer 300 to the top of the pipe ramming adapter 200.

[0060] Step S400: Pile driving, including the following steps:

[0061] Step S410: Start the hydraulic hammer 300. First, use a small energy for hammer-driven pile driving, and then gradually increase the energy according to the penetration of the pile driving on site. During the pile driving process, the surveyors monitor the verticality of the foundation pile in real time and make records until the foundation pile is driven to the design elevation. The surveyors re-check and accept the elevation of the top of the foundation pile again. After passing the acceptance, complete the pile driving work of a single foundation pile. The schematic diagram after the pile driving in place is as shown in Figure 8 ;

[0062] Step S420: Send the hydraulic hammer 300 and the pipe ramming adapter 200 back to the deck of the crane vessel. Lift the submersible positioning frame 100 and move the vessel to the next foundation pile, and successively complete the pile driving of the remaining three foundation piles.

[0063] This pile driving method uses the above-mentioned bottom-sitting positioning frame 100 for secondary positioning, which can reduce the difficulty of the four-pile secondary synchronous positioning of the traditional positioning frame, ensure the verticality of the underwater foundation pile driving construction, and improve the construction efficiency and quality. The single-pile positioning structure form is adopted to position the underwater foundation pile through the ship measurement and positioning equipment. During the process, divers can be used to assist in the observation to ensure the positioning accuracy and efficiency.

[0064] It should be noted that in the description of the present invention, if there is any reference to the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc., it is all based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation to the present invention.

[0065] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If there is a description of the first or the second, etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0066] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0067] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A bottom-mounted positioning frame, characterized in that: The bottom-seated positioning frame (100) comprises an upper cylinder (110) and a lower anti-sinking plate (120), wherein the upper and lower ends of the upper cylinder (110) are respectively provided with an upper bell mouth (111) and a lower bell mouth (112), wherein the lower anti-sinking plate (120) is connected to the lower end of the upper cylinder (110), and the lower anti-sinking plate (120) is provided with a guide opening corresponding to the lower bell mouth (112). When the pile is sleeved, the bottom-seated positioning frame (100) is sleeved on the outside of the foundation pile through the guide opening of the lower anti-sinking plate (120) and the lower bell mouth (112) until the lower anti-sinking plate (120) contacts the mud surface.

2. The bottom-mounted positioning frame according to claim 1, characterized in that: A diagonal brace (130) is connected between the upper cylinder (110) and the lower anti-sinking plate (120).

3. The bottom-mounted positioning frame according to claim 2, characterized in that: There are a plurality of diagonal support rods (130) distributed along the circumferential direction.

4. The bottom-mounted positioning frame according to claim 1, characterized in that: The lower anti-sinking plate (120) comprises a base and a plate body laid inside the base.

5. The bottom-mounted positioning frame according to claim 4, characterized in that: The base is welded by I-beams, and is connected and reinforced by channel steel and angle steel in the middle.

6. The bottom-mounted positioning frame according to claim 4, characterized in that: The plate body is a patterned steel plate, and a plurality of through holes are formed on the patterned steel plate.

7. A four-pile jacket foundation pile sinking method, characterized in that: The secondary positioning is performed using the bottom-mounted positioning frame (100) as claimed in any one of claims 1 to 6, comprising the following steps: Step S100, the crane vessel drops anchor and positions; Step S200, lifting and installing the bottom-mounted positioning frame (100); Step S300, hoisting and installing the pile driver (200) and the hydraulic hammer (300); Step S400: sinking piles.

8. The four-pile jacket foundation pile sinking method according to claim 7, characterized in that: Step S200 includes the following steps: Step S210: The crane vessel lifts the bottom-mounted positioning frame (100), and the relative position relationship between the bottom-mounted positioning frame (100) and the foundation pile is monitored in real time by a GPS positioning system; Step S220, slowly lower the bottom-seated positioning frame (100) to the top of the foundation pile, and a diver goes into the water to assist in the pile-covering work of the bottom-seated positioning frame (100), and the bottom-seated positioning frame (100) is covered on the outside of the foundation pile through the guide opening of the lower anti-sinking plate (120) and the lower bell mouth (112) until the lower anti-sinking plate (120) contacts the mud surface, and the upper bell mouth (111) and the top of the diagonal brace (130) are both located above the top of the foundation pile.

9. The four-pile jacket foundation pile sinking method according to claim 7, characterized in that: Step S300 includes the following steps: Step S310, using the main hook of the crane ship to lift the hydraulic hammer (300), the auxiliary hook to hang the pile driver (200), and the balance beam to lift the pile driver (200); Step S320, the crane arm is rotated to send the pile driver (200) to the top of the bottom-mounted positioning frame (100), and the pile driver (200) is slowly lowered according to the display of the GPS positioning system, and at the same time, a diver is used to assist in directing the pile driver (200) to insert the pile underwater, thereby completing the pile insertion of the pile driver (200); Step 330: adjust the angle of the crane boom and put the hydraulic hammer (300) on the top of the pile driver (200).

10. The four-pile jacket foundation pile sinking method according to claim 7, characterized in that: Step S400 includes the following steps: Step S410, start the hydraulic hammer (300), first use a small amount of energy to hammer and sink the pile, then gradually increase the energy until the foundation pile is sunk to the designed elevation; Step S420, the hydraulic hammer (300) and the pile driver (200) are returned to the deck of the crane ship, the bottom-seated positioning frame (100) is lifted and the ship is moved to the next foundation pile, and the remaining three foundation piles are sunk in sequence.

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