Disclosure of Invention
Embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art, and provide a piling method and a piling device for a submarine buried pile.
In one aspect, embodiments of the present disclosure provide a method of driving a subsea buried pile, the method comprising:
fixing the first end of the pile driver along the length direction of the pile driver on the first end of the pile driver along the length direction of the pile driver;
The pile follower and the pile follower after being fixed are hoisted and translated to a second preset position and turned, the second end of the pile follower after being turned along the length direction is inserted into the first end of the main pile, the first end face of the pile follower is abutted with the first end face of the main pile, and the pile follower is maintained in a hoisting state;
the pile driver and the main pile are connected into a whole through the pile extension device;
Opening a limit structure of the pile supporting frame, and moving the pile driver by hoisting so that the main pile can be driven under the gravity action of the pile driver, the pile extension device and the main pile;
After pile sinking is completed, releasing the hoisting state of the pile driver, and fixing a vibrating hammer at the second end of the pile driver along the length direction;
Starting the vibrating hammer, and driving the main pile to a preset depth position on the sea floor by adjusting the piling frequency and the hoisting hook falling speed of the vibrating hammer;
And recycling the vibrating hammer, the pile extension device and the pile delivery device which are fixedly connected to the floating crane ship.
Optionally, the pile extension device comprises a pile extension device main body, a movable guide, a fixed guide and a driving unit for driving the movable guide to move, wherein a plurality of pairs of guide grooves with inclined bottoms are formed in the fixed guide and the movable guide, each pair of guide grooves is embedded with a tensioning plate, the tensioning plates are in sliding fit with the bottom of the guide grooves, and the tensioning plates are provided with ejector blocks;
the pile driver and the main pile are connected into a whole through the pile extension device, and the pile extension device comprises:
The driving unit drives the movable guide to move towards the direction close to the fixed guide, the tensioning plate is extruded to move outwards in the guide groove by the bottoms of the guide grooves with inclined sides, and the ejector block is ejected outwards to the inner wall of the main pile so as to connect the pile feeder with the main pile into a whole.
Optionally, the recovering the vibratory hammer, the pile extension device and the pile delivery device which are fixedly connected to the floating crane vessel includes:
the driving unit drives the movable guide to move in a direction away from the fixed guide, the tensioning plate moves inwards in the guide groove, and the jacking block contracts inwards in the radial direction of the pile extension device main body to be separated from the inner wall of the main pile;
and hoisting and recycling the vibrating hammer, the pile extension device and the pile delivery device which are fixedly connected to the floating crane ship.
Optionally, the pile extension device is a hydraulic pile extension device.
Optionally, the limit structure of the pile supporting frame comprises a frame body provided with a through channel and a supporting component connected with the frame body, wherein a plurality of lug plates are distributed on the outer surface of the first end of the main pile along the circumferential direction of the first end of the main pile;
The support assembly comprises a plurality of support pieces and a plurality of telescopic mechanisms corresponding to the support pieces, and the telescopic mechanisms drive the support pieces to reciprocate between a first position for supporting the ear plate and a second position far away from the ear plate.
Optionally, the hoisting and translating the main pile to the first predetermined position and turning the pile includes:
And hoisting and translating the main pile to a first preset position, connecting an anchor chain and overturning the main pile.
Optionally, central axes of the pile supporting frame, the pile extension device and the pile delivery device which are fixedly connected are coincident and perpendicular to the seabed plane.
Optionally, before the hoisting and translating the main pile to the first predetermined position and turning the pile, the piling method further includes:
and fixing the pile supporting frame on the side of the floating crane ship for hanging the main pile.
In another aspect, embodiments of the present disclosure provide a piling device for a subsea buried pile, the piling device comprising a pile follower, and a vibratory hammer, the piling device employing the piling method described above.
According to the piling method and the piling device for the submarine embedded pile, the underwater pile supporting frame can be avoided, embedded pile driving can be achieved through the vibrating hammer, the piling efficiency is remarkably improved, the occurrence of a sliding pile is effectively avoided, and pile pulling operation can be conducted under special conditions.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present disclosure, the present disclosure will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in FIG. 1, the piling method of the submarine buried pile comprises the following steps of S1, fixing a pile support frame on the side of a floating crane ship for hanging a main pile.
Specifically, referring to fig. 2 and 3 together, first, a pile guide 100 is fixed to the side of a floating vessel 200, and the pile guide fixed to the side of the floating vessel 200 is used for hanging a main pile 300. When the main pile 300 is hung on the pile supporting frame 100, the pile supporting frame 100 can provide fixing and guiding functions for the main pile 300, so that the subsequent pile driving operation is convenient.
It should be noted that, the pile supporting frame 100 includes a limiting structure, the limiting structure includes a frame body 110 provided with a through channel and a supporting component 120 connected to the frame body 110, and a plurality of lugs 310 are distributed on the outer surface of the first end of the main pile 300 along the circumferential direction thereof. The through channel of the frame 110 is used for penetrating the main pile 300, and the support assembly 120 is used for supporting the corresponding ear plate 310. The support assembly 120 includes a plurality of supports and a plurality of telescoping mechanisms (not shown) corresponding to the plurality of supports that drive the supports to reciprocate between a first position supporting the ear plate 310 and a second position away from the ear plate 310.
As a specific example, as shown in fig. 3, two lugs 310 are symmetrically disposed at the top end of the main pile 300 along the circumferential direction, and corresponding supporting members are respectively disposed on the frame 110 at both sides of the through channel. When the pile support 100 is required to carry out limit support on the main pile 300, the telescopic mechanism drives the supporting piece to the first position, and the supporting piece can be supported on the lug plate 310, so that the main pile 300 is erected on the pile support 100. When the pile rest 100 completes the limit support task for the main pile 300, the telescopic mechanism drives the support member to the second position, the support member is away from the lug plate 310, and the main pile 300 is no longer supported on the pile rest 100. As a specific example, the telescopic mechanism may be provided as a hydraulic jack.
S2, fixing the first end of the pile driver along the length direction of the pile driver to the first end of the pile driver along the length direction of the pile driver.
Specifically, referring to fig. 4 and 5 together, pile driver 400 and pile driver 500 are fixedly connected. As shown in fig. 4, the pile extension device 400 includes a pile extension device main body 410, a movable guide (not shown in the figure), a fixed guide (not shown in the figure), and a driving unit 420 for driving the movable guide to move, wherein a plurality of pairs of guide grooves with inclined bottoms are formed on the fixed guide and the movable guide, each pair of guide grooves is embedded with a tensioning plate 430, the tensioning plates 430 are slidably matched with the bottom of the guide grooves, and the tensioning plates 430 are provided with top blocks 431. As shown in fig. 5, the top of the pile driver 400 is connected to the bottom of the pile driver 500, it will be understood that the driving unit 420 at the top of the pile driver 400 is inserted into the bottom of the pile driver 500, and the pile driver 400 is connected to the pile driver 500 by means of the clamping heads 440 provided at the first ends along the length thereof. The collet 440 and the pile driver 500 may be connected by bolts, in particular.
S3, hoisting and translating the main pile to a first preset position, turning the pile, and hanging the turned main pile on a pile support frame on the side of the floating crane along the first end of the length direction of the main pile. And hoisting and translating the fixed pile extension device and the pile delivery device to a second preset position and turning the pile, inserting the second end of the pile extension device after turning the pile into the first end of the main pile along the length direction of the pile extension device, abutting the first end face of the pile delivery device with the first end face of the main pile, and maintaining the pile delivery device in a hoisting state.
Specifically, referring to fig. 3 and 6 together, the main pile 300 is lifted and translated to a first predetermined position by using a lifting device, and then pile turning operation is performed on the main pile 300. That is, the pile-turned main pile 300 is hung on the pile holder 100 on the side of the floating vessel 200 by a hoisting device. It should be noted that, after the main pile 300 is hoisted and translated to the first preset position, the main pile 300 and the floating vessel 200 can be connected together through the anchor chain 210, so as to perform a certain degree of fixed connection on the main pile 300, and then the main pile 300 is turned over again to perform pile turning operation, so that the later stage of launching by a diver and connecting the anchor chain under water is avoided.
As shown in fig. 5 to 8, after the hanging of the main pile 300 is completed, the hoisting operation of the pile follower 400 and the pile driver 500, which have been fixedly connected, is continued by using the hoisting device. The fixed pile extension 400 and pile driver 500 are hoisted and translated to a second preset position, and then pile turning operation is carried out on the pile extension 400 and the pile driver 500. After pile turning, the bottom of the fixed pile follower 400 is inserted into the top of the main pile 300, and the bottom end face of the fixed pile follower 500 abuts against the top end face of the main pile 300, so that no gap exists between the bottom end face of the pile follower 500 and the top end face of the main pile 300. As shown in fig. 6 and 7, the lifting hook 220 is a part of a lifting device, and the main pile 300, the pile follower 400 and the pile driver 500 which are fixedly connected are all lifted and moved by the lifting hook 220 of the lifting device.
And S4, connecting the pile driver and the main pile into a whole through the pile extension device.
Specifically, referring to fig. 4, 5 and 8 together, after the pile driver 500, the pile extension 400 and the main pile 300 are lifted, the pile extension 400 is started, and the pile driver 500 and the main pile 300 are integrally connected by the pile extension 400. The driving unit 420 in the pile extension 400 drives the movable guide to move in a direction approaching to the fixed guide, the tensioning plate 430 is pressed by the bottoms of the guide grooves with two inclined sides to move outwards in the guide grooves, and the ejector blocks 431 are ejected outwards to the inner wall of the main pile 300 to connect the pile extension 500 and the main pile 300 into a whole. It will be appreciated that when the top blocks 431 are ejected outwardly against the inner wall of the main pile 300, the radial force provided by the top blocks 431 to the main pile 300 is converted into an axial force fixedly connecting the main pile 300 and the pile follower 500. Connecting the main pile 300 and the pile driver 500 together can improve the force transmission effect during subsequent pile driving and can also effectively prevent the pile slipping. As an example, the pile driver 400 may be specifically configured as a hydraulic pile driver, and the top block 431 is moved by the driving of the hydraulic driving unit 420.
S5, opening a limit structure of the pile supporting frame, and moving the pile driver through hoisting so that the main pile can be driven under the gravity action of the pile driver, the pile extension device and the main pile.
Specifically, referring to fig. 3 to 5, 8 and 9 together, the pile driver 500 is maintained in a lifted state all the time, and after the pile driver 500 is integrally connected with the main pile 300, the limit structure of the pile supporting frame 100 is opened, and the pile driver 500, the pile extension 400 and the main pile 300 are integrally lowered by the lifting device to perform pile sinking operation. The main pile 300 can be partially submerged under the seabed mud surface by virtue of the self weights of the pile driver 500, the pile extension 400 and the main pile 300. In this process, whether the perpendicularity of the main pile 300 meets the design requirement when the pile sinking operation is obtained is measured by an angle measuring device arranged on the main pile 300, if not, pile pulling is performed again, and if yes, a vibrating hammer is placed on a pile feeder after the pile sinking operation is completed. As a specific example, the angle measuring device may be provided as a level bar, and of course, the angle measuring device may be provided as a device other than a level bar, which is not particularly limited in this embodiment.
As shown in fig. 8, the central axis of the pile supporting frame 100 is perpendicular to the seabed plane, and the central axis of the pile supporting frame 100 coincides with the central axes of the pile driver 500, the pile follower 400, and the main pile 300 after hoisting. So that the perpendicularity of the main pile 300 can be ensured in the subsequent piling process, and the main pile 300 can be driven into the seabed mud perpendicular to the seabed plane.
And S6, after pile sinking is completed, releasing the hoisting state of the pile driver, and fixing the vibrating hammer at the second end of the pile driver along the length direction of the pile driver.
Specifically, referring to fig. 5 and 9 together, the vibration hammer 600 after the hoisting is completed is positioned at the top end of the pile driver 500, the pile driver 500 is positioned at the top end of the pile extension 400, and the pile extension 400 is positioned at the top end of the main pile 300. At this time, the hoisting equipment does not have force, and the main pile 300 can continue to sink under the seabed mud surface by means of the self weights of the vibrating hammer 600, the pile driver 500, the pile extension 400 and the main pile 300 so as to perform pile sinking operation again. After the pile sinking operation is completed, whether the perpendicularity of the main pile 300 meets the design requirement after the pile sinking operation is completed is measured by an angle measuring device arranged on the main pile 300, if not, pile pulling is performed again, and if yes, vibration pile driving is performed by using a vibration hammer 600 after the pile sinking operation is completed.
The oscillating weight 600 is designed using resonance theory. When the forced vibration frequency of the main pile is consistent with the vibration frequency of the soil particles, the soil particles resonate. At this time, the soil particles have large amplitude, and enough vibration speed and acceleration can quickly destroy the adhesive force between the main pile and the soil, so that the pile body and the soil are transited from a compacting state to an instant separating state, pile sinking resistance, particularly the side resistance of the pile sinking resistance is quickly reduced, and the pile is sunk under the action of dead weight. Because the vibrating hammer achieves the aim of pile sinking by reducing the friction force between the pile and the soil, the pile can be pulled up by using a force slightly larger than the pile and the pile body under the condition that the friction force between the pile and the soil is reduced. Therefore, the vibratory hammer is suitable for pile sinking and pile pulling. Pile sinking and pile pulling efficiency are high.
S7, starting the vibrating hammer, and driving the main pile to a preset depth position of the seabed by adjusting the piling frequency and the hoisting hook falling speed of the vibrating hammer.
Specifically, referring to fig. 5, 9 and 10 together, after the pile sinking operation is completed, the vibratory hammer 600 is started, the vibratory hammer 600 performs a vibratory hammering on the pile driver 500, and the pile driver 500 transmits the force of the vibratory hammering to the main pile 300 through the pile extension 400, so that the main pile 300 can be maintained to be perpendicular to the seabed plane and move downward. During this time, the lifting hook 220 of the lifting device is adjusted to descend at the same speed as the main pile 300, so as to ensure that the vibratory hammer 600 can always transmit acting force to the main pile 300 to drive the main pile 300 to move downwards. The main pile 300 is forced to vibrate at a frequency consistent with that of the seabed soil particles by the vibratory hammer 600, and the main pile can be continuously lowered below the seabed soil surface. The specific descending depth of the main pile 300 can be controlled according to actual needs in a specific operation process, so that the main pile 300 can be driven to a preset depth position on the sea floor. As a specific example, the specific pile depth may be determined by the real-time water depth, sea wave height, and the position of the scale on the pile driver 500 at the sea surface. The embodiment of the present disclosure may set the pile driving depth to a preset depth position below the seabed mud surface by completely driving the main pile, and of course, if there are other design requirements on the pile driving depth in actual engineering, for example, a part of the main pile is exposed out of the seabed mud surface, the pile driving depth may be designed according to the design requirements, which is not limited in this embodiment.
If the main pile cannot be driven to the preset depth position of the seabed by using the vibrating hammer, the impact hammer may be replaced to continue driving until the main pile is driven to the preset depth position of the seabed. In the process of piling by using the impact hammer, whether the perpendicularity of the main pile 300 meets the design requirement is measured by an angle measuring device arranged on the main pile 300, if not, pile pulling is performed again, and if yes, pile piling is performed continuously, so that the perpendicularity of the main pile 300 meets the design requirement during pile piling is ensured. It is further noted that, because the embodiment of the disclosure adopts the hoisting device to hoist the vibratory hammer to pile, the vibratory hammer can transmit the vibratory force perpendicular to the seabed plane to the main pile at any time, and thus the perpendicularity of the main pile relative to the seabed plane during pile driving can be ensured. And the vibration hammer is hoisted by using hoisting equipment to pile, so that the situation of pile sliding can be effectively prevented. And pile pulling operation can be timely and conveniently carried out when the perpendicularity of the main pile exceeds the design requirement by adopting the vibrating hammer for pile driving.
According to the piling method of the submarine buried pile, the main pile is hung on the pile supporting frame on the side of the floating crane ship by using the hoisting equipment, so that the central axis of the main pile is perpendicular to the seabed plane. Then through hoist and mount vibratory hammer, pile follower and pile extension ware for the main pile can be under guaranteeing its straightness requirement that hangs down and the not circumstances of swift current stake, realize piling the design requirement to going into mud completely with the main pile. The pile driving operation of the embedded pile by using the vibrating hammer is realized, the pile driving efficiency is obviously improved, the pile sliding is effectively avoided, the pile pulling operation can be performed under special conditions, the pile driving device has the advantages of simplicity in operation, no need of underwater observation, underwater operation and the like, the construction efficiency is improved, and the operation risk and the construction cost are reduced.
S8, recycling the vibrating hammer, the pile extension device and the pile delivery device which are fixedly connected to the floating crane ship.
Specifically, referring to fig. 10 together, when the main pile is driven to a predetermined depth position and the vibration hammer 600, the fixedly connected pile follower 400 and the pile follower 500 are required to be recovered, the vibration hammer 600 may be recovered to the floating vessel 200 by the hoisting device, the movable guide is driven to move away from the fixed guide by the driving unit 420 of the pile follower 400, the tension plate 430 moves inward in the guide groove, the top block 431 is retracted inward in the radial direction of the pile follower body 410 to be separated from the inner wall of the main pile 300, and at this time, the pile follower 500 and the main pile 300 are disconnected to be in an integrated state, and the pile follower 500 and the pile follower 400 are recovered to the floating vessel 200 by the hoisting device.
According to the piling method of the submarine buried pile, after piling is completed, the vibrating hammer, the pile extension device and the pile delivery device which are fixedly connected can be conveniently recovered.
In another aspect, embodiments of the present disclosure provide a piling device for a subsea buried pile, the piling device comprising a pile follower, and a vibratory hammer, the piling device employing the piling method described above. The pile driving device for the submarine embedded pile can realize the design requirement of driving the pile body to completely enter mud under the conditions of ensuring that the pile body cannot slide and ensuring the perpendicularity, realizes the driving operation of the embedded pile by using a vibrating hammer, remarkably improves the driving efficiency, effectively avoids the occurrence of slide pile and can perform pile pulling operation under special conditions, has the advantages of simple operation, no need of underwater observation, underwater operation and the like, improves the construction efficiency, and reduces the operation risk and the construction cost.
It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.