CN216865139U - Pile sliding prevention system of pile driving barge - Google Patents
Pile sliding prevention system of pile driving barge Download PDFInfo
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- CN216865139U CN216865139U CN202220068603.5U CN202220068603U CN216865139U CN 216865139 U CN216865139 U CN 216865139U CN 202220068603 U CN202220068603 U CN 202220068603U CN 216865139 U CN216865139 U CN 216865139U
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Abstract
The utility model discloses an anti-slip pile system of a pile driving barge, which comprises a winch, a pulley block, an anti-slip pile oil cylinder, an upper pile gripper and a balance weight; a steel wire rope is wound on the winch and sequentially wound around the pulley block, the upper pile gripper and the balance weight; the balance weight is arranged below the upper pile gripper; the anti-sliding pile oil cylinder is connected with the pulley block, and the rodless cavity side of the anti-sliding pile oil cylinder is connected with an energy accumulator through a hydraulic system. The utility model can be adapted to various soil layers which can generate pile slipping when the equipment is not adjusted, can effectively inhibit the amplitude of pile slipping in the pile sinking process, prevents the pile slipping from being damaged, and ensures the safety of operating personnel and equipment.
Description
Technical Field
The utility model relates to a pile sinking construction technology of a pile driving barge, in particular to an anti-slip pile system of the pile driving barge.
Background
During offshore pile sinking operation, different geological layers can provide different requirements for a pile driving ship, a pile hammer and a pile, and if a loose and soft soil layer with a thick covering layer is encountered, the pile slipping phenomenon can be caused by a common operation mode, so that deck steel wire rope jumping, the pile hammer falling, pile cracking damage and the like are caused, and huge safety risks, economic losses and construction period delay are caused. The method for preventing pile slipping includes reducing the dead weight of pile body or pile hammer, controlling the hammering energy from small to large during construction, etc. The reduction of the dead weight of the pile in engineering construction is difficult to realize, the reduction of the dead weight of the pile hammer cannot avoid the phenomenon of pile slipping, if the pile hammer meets a sand bed with higher compactness, the design elevation is difficult to achieve, and the application of the methods has certain limitation.
Analyzing the reason of pile slipping: in the pile sinking process, the stress state of the pile is as shown in fig. 1, and if the total soil bearing capacity Qd (formula 1) is less than the total sinking force F (formula 2), the pile slipping can be generated:
1) is less than the dead weight of the pile body;
2) less than the sum of the weights of the pile and the pile hammer;
3) less than the sum of the weight of the pile and hammer and the inertial force of the pile.
The condition of soil layers with reduced side friction force, particularly softer soil layers such as silt, silt clay and the like, is noticed, and the side friction force is quickly reduced under the action of dynamic load; in addition, when the soil layer changes, sandy soil is switched to cohesive soil, and the bearing capacity of the end part is weakened.
In the formula: qdRepresenting the total resistance (KN) to which the pile is subjected;
Qfindicating the lateral friction (KN) experienced by the pile;
QRrepresents pile tip resistance (KN);
u represents the perimeter (m) of the section of the pile body;
qfiunit surface of i-th layer soil is expressed activelyPile limit side resistance standard value (kPa);
lithe length (m) of the pile body in the ith layer of soil is shown;
qRexpressing a standard value (kPa) of the resistance of the limiting pile end of a unit area;
a represents the cross-sectional area (m) of the pile body2)。
The total sinking force of the pile foundation can be calculated according to the following formula:
F＝G+Fp (2)
in the formula: g represents the floating supporting force (KN) of the pile, the hammer and the secondary driving structural member at the water inlet end;
Fpthe inertial force (KN) of pile driving is shown.
As can be seen from the composition of the formula (1) and the formula (2), in order to solve the problem of pile slipping, the traditional methods have the disadvantages of reducing the self weight of a pile body or the self weight of a pile hammer, increasing the soil bearing capacity of the pile (arranging a bottom sealing plate, increasing the pile diameter and the like), reducing the striking energy of the pile (adopting a proper pile hammer and adopting a small hammer for small energy hammering) and the like, and have certain limitations.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a pile slipping prevention system of a pile driving vessel, which can be adapted to various soil layers possibly generating pile slipping when equipment is not adjusted, can effectively inhibit the pile slipping range in the pile sinking process, prevent the pile slipping range from being damaged and ensure the safety of operators and equipment.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an anti-slip pile system of a pile driving barge comprises a winch, a pulley block, an anti-slip pile oil cylinder, an upper pile gripper and a balance weight;
a steel wire rope is wound on the winch and sequentially wound around the pulley block, the upper pile gripper and the balance weight;
the balance weight is arranged below the upper pile gripper;
the anti-sliding pile oil cylinder is connected with the pulley block, and the rodless cavity side of the anti-sliding pile oil cylinder is connected with an energy accumulator through a hydraulic system.
Preferably, the pile driving device further comprises a lower pile gripper, and the lower pile gripper is located below the balance weight.
Preferably, the pulley block comprises a fixed pulley block and a movable pulley block;
the fixed pulley block is connected with the rodless cavity side of the anti-slip pile oil cylinder, and the movable pulley block is connected with the rod cavity side of the anti-slip pile oil cylinder.
Preferably, the hydraulic system comprises a proportional valve PS1, a solenoid valve S1, a solenoid valve S2, a solenoid valve S3, a first cartridge valve, a second cartridge valve, a first balance valve, a second balance valve, a shuttle valve, a one-way valve, a main valve and a relief valve;
the proportional valve PS1 is used for controlling the anti-slide pile oil cylinder and the energy accumulator;
the rodless cavity side of the anti-slip pile oil cylinder is connected with an energy accumulator through the first cartridge valve;
the second cartridge valve, the main valve and the overflow valve form a safety overflow valve for discharging redundant hydraulic oil into an oil tank;
the first cartridge valve, the shuttle valve, the solenoid valve S1 and the solenoid valve S2 form a one-way hydraulic lock for locking the anti-slide pile oil cylinder;
the electromagnetic valve S3 is used for discharging hydraulic oil in the energy accumulator to the oil tank;
the first balance valve and the second balance valve are used for preventing leakage of the anti-slipping pile oil cylinder.
Preferably, pressure sensors are arranged on the anti-slip pile oil cylinder and the energy accumulator;
and the energy accumulator is also provided with a pressure gauge.
The pile slipping preventing system of the pile driving barge provided by the utility model has the following beneficial effects:
1) besides the bearing capacity of the soil layer, a controllable anti-slip pile device is introduced to balance the gravity and the inertia force of the pile sinking equipment, so that the influence of the bearing capacity of the soil layer is weakened;
2) the pile slipping prevention device absorbs pile slipping energy to change gradually, the process is smooth, and the response is quick;
3) the damage of destructive pile slipping is prevented.
Drawings
FIG. 1 is a schematic diagram of a prior art pile force analysis;
FIG. 2 is a schematic structural diagram of the pile slipping preventing system of the pile driving barge according to the utility model;
FIG. 3 is an enlarged schematic view of position A of FIG. 2;
FIG. 4 is an exploded view of the anti-slip pile system of the pile driving vessel of the present invention;
fig. 5 is a hydraulic principle schematic diagram of a hydraulic system in the pile driving boat pile slipping prevention system.
Detailed Description
In order to better understand the technical solutions of the present invention, the following further describes the technical solutions of the present invention with reference to the accompanying drawings and examples.
Referring to fig. 2 and 3, the pile slipping preventing system for the pile driving barge provided by the utility model comprises a winch 1, a pulley block, a pile slipping preventing cylinder 2, an upper pile gripper 3 and a counterweight 4.
A steel wire rope 5 is wound on the winch 1, and the steel wire rope 5 sequentially winds the pulley block, the upper pile gripper 3 and the counterweight 4;
the counter weight 4 is arranged below the upper pile gripper 3.
The pulley block comprises a fixed pulley block 6 and a movable pulley block 7.
The fixed pulley block 6 is connected with the rodless cavity side of the anti-slip pile oil cylinder 2, and the movable pulley block 7 is connected with the rod cavity side of the anti-slip pile oil cylinder 2.
The rodless cavity side of the anti-slip pile oil cylinder 2 is connected with an energy accumulator 8 through a hydraulic system.
The pile slipping preventing system of the pile driving barge further comprises a lower pile gripper 9, and the lower pile gripper 9 is positioned below the balance weight 4.
Referring to fig. 5, the hydraulic system includes a proportional valve PS1, a solenoid valve S1, a solenoid valve S2, a solenoid valve S3, a first cartridge valve 10, a second cartridge valve 11, a first counter balance valve 12, a second counter balance valve 13, a shuttle valve 14, a check valve 15, a main valve 16, and a relief valve 17.
The proportional valve PS1 is used to control the state of the anti-slide pile cylinder 2 and the accumulator 8.
The rodless cavity side of the anti-slip pile oil cylinder 2 is connected with an energy accumulator 8 through a first cartridge valve 10.
The second cartridge valve 11, the main valve 16 and the overflow valve 17 form a large-diameter safety overflow valve, which is used for discharging redundant hydraulic oil into the oil tank 18, instantaneously responding to the large-flow overflow requirement of the anti-slip pile oil cylinder 2, and playing a good protection role.
The first cartridge valve 10, the shuttle valve 14, the solenoid valve S1 and the solenoid valve S2 form a one-way hydraulic lock for locking the anti-slide pile cylinder 2.
The solenoid valve S3 is used to discharge the hydraulic oil in the accumulator 8 into the oil tank 18.
The first balance valve 12 and the second balance valve 13 can lock the anti-slide pile cylinder 2 at ordinary times, and are used for preventing leakage or misoperation of the anti-slide pile cylinder 2.
And pressure sensors PT1 and PT2 are arranged on the anti-slide pile oil cylinder 2 and the energy accumulator 8.
The accumulator 8 is also provided with a pressure gauge 19.
Referring again to fig. 1 and 2, if slip occurs, the total resistance Q experienced by the pile 20 is increaseddAnd guarantee QdIf the distance is larger than F, pile slipping can be greatly reduced, and pile slipping damage is reduced to be completely eliminated. Therefore, the pile frame 21 is added with the pile slipping preventing system of the pile driving barge.
Referring to fig. 4, in the pile slipping preventing system of the pile driving vessel of the present invention, the upper pile gripper 3 and the counterweight 4 can move along the pile frame 21 and are connected to the pulley block, the pile slipping preventing cylinder 2 and the winch 1 through the steel wire rope 5, after the pile 20 is positioned, the upper pile gripper 3 grips the pile 20, the counterweight 4 is disposed below the upper pile gripper 3, a certain tensioning amount Δ h1 (a preset pile slipping sinking amount) of the steel wire rope 5 is reserved, at this time, the upper pile gripper 3 applies a sinking force to the pile 20, and the counterweight 4 is mainly used for tensioning the steel wire rope 5. Before pile sinking, the winch is released in advance according to the elevation of the pile 20 and the tensioning amount delta h1 of the steel wire rope 5 is kept, if the winch 1 is not moved in a certain pile sinking process and the sinking amount of the pile 20 suddenly exceeds delta h1, the pile is judged to be pile slipping, the sinking force applied to the pile 20 by the steel wire rope 5 through the upper pile gripper 3 is changed into lifting force, the lifting force is set by the anti-slip pile oil cylinder 2, the pile slipping energy is absorbed by the anti-slip pile oil cylinder 2, and the pile slipping energy W absorbed by the anti-slip pile oil cylinder 2 is changed into pile slipping energycThe calculation is as follows:
Wc＝(F-Qd)×Δh2
＝(G+Fp-Qf-QR)×Δh2
＝(G-Qf-QR)×Δh2+FpΔh2
＝(G-Qf-QR)×Δh2+Wp..................(3)
in the formula: w is a group ofpRepresents the hammering energy of the hammer 22;
Δ h2 represents the amount of sinking of pile 20 after the anti-slip pile has been set.
W to be absorbed by anti-slip pile oil cylinder 2cThe energy, which is either absorbed by the accumulator 8 or dissipated by flooding through the main valve 16. Referring to fig. 5, the anti-slip pile cylinder 2 is pressurized, a displacement sensor is arranged in the anti-slip pile cylinder, and the rodless cavity side of the anti-slip pile cylinder 2 is connected with an energy accumulator 8 through a first cartridge valve 10. The second cartridge valve 11, the main valve 16 and the overflow valve 17 form a large-diameter safety overflow valve, which is used for discharging redundant hydraulic oil into the oil tank 18, instantaneously responding to the large-flow overflow requirement of the anti-slip pile oil cylinder 2, and playing a good protection role. The first cartridge valve 10, the shuttle valve 14, the solenoid valve S1 and the solenoid valve S2 form a one-way hydraulic lock for locking the anti-slide pile cylinder 2. The solenoid valve S3 is used to discharge the hydraulic oil in the accumulator 8 into the oil tank 18. The first balance valve 12 and the second balance valve 13 can lock the anti-slide pile cylinder 2 at ordinary times, and are used for preventing leakage or misoperation of the anti-slide pile cylinder 2.
The main working conditions of the pile slipping prevention system of the pile driving barge are as follows:
1) preparing before pile sinking:
a) positioning a pile 20 on a pile frame 21, tightly holding the pile 20 by an upper pile gripper 3, adjusting a steel wire rope 5 by a winch 1, placing a balance weight 4 below the upper pile gripper 3, tensioning the steel wire rope 5 and reserving a certain tensioning amount of the steel wire rope 5;
b) adjusting the initial working pressure of the energy accumulator 8 to P1, de-energizing the electromagnetic valve S1, energizing the electromagnetic valve S2, operating the proportional valve PS1 (right position), because the anti-slide pile oil cylinder 2 is close to zero load, the hydraulic oil passes through the proportional valve PS1 (right position), the first balance valve 12 and the non-rod cavity A1 opening ejection oil cylinder of the anti-slide pile oil cylinder 2, the hydraulic oil of the rod cavity of the anti-slide pile oil cylinder 2 passes through the port B2, the port B1, the second balance valve 13 and the proportional valve PS1 oil return tank 18, the system pressure begins to rise after the anti-slide pile oil cylinder 2 is completely ejected, at the moment, the hydraulic oil charges the energy accumulator 8 through the proportional valve PS1 (right position), the first balance valve 12 and the first cartridge valve 10, and stops when the charging pressure reaches the working pressure P1;
c) adjusting the initial position of the anti-slide pile oil cylinder 2 to enable the anti-slide pile oil cylinder 2 to have a set anti-slide pile protection stroke: when the pressure of the energy accumulator 8 reaches P1, the electromagnetic valves S1 and S2 are de-energized, the first cartridge valve 10 is in a closed state, and the energy accumulator 8 and the anti-slip pile oil cylinder 2 are separated from each other; the proportional valve PS1 is operated to set the anti-slip pile cylinder 2 to the initial position.
2) Pile sinking:
when the electromagnetic valve S1 is de-energized, the electromagnetic valve S2 is energized, the first cartridge valve 10 is in one-way conduction, hydraulic oil can flow into the energy accumulator 8 from a rodless cavity of the pile slipping prevention oil cylinder 2, and pile slipping is prevented.
Since the balance weight 4 is arranged below the upper pile gripper 3, the steel wire rope 5 has a certain tensioning amount delta h1, the tensioning amount is larger than the variation of the steel wire rope 5 caused by one-time sinking of the pile 20 in the normal pile sinking process, and the winch 1 continuously releases the steel wire rope 5 along with the sinking of the pile 20, so that the balance weight 4 is always arranged below the upper pile gripper 3. At this time, the load of the anti-slide pile oil cylinder 2 is very small, and the hydraulic oil of the rodless cavity of the anti-slide pile oil cylinder 2 cannot flow into the energy accumulator 8.
3) And (3) anti-sliding piles:
when the electromagnetic valve S1 is de-energized, the electromagnetic valve S2 is energized, the first cartridge valve 10 is conducted in a one-way mode, and hydraulic oil can flow into the energy accumulator 8 from a rodless cavity of the anti-slip pile oil cylinder 2.
When the amount of change in the wire rope 5 due to the sinking of the pile 20 exceeds Δ h1 in a pile sinking operation, it is considered that pile slipping starts. At the moment, the sinking force applied to the pile 20 by the steel wire rope 5 through the upper pile gripper 3 is changed into lifting force, when the pressure of a rodless cavity caused by the lifting force to the pile slipping prevention oil cylinder 2 is greater than the set pressure P1 of the energy accumulator 8, the pile slipping prevention oil cylinder 2 starts to act, the hydraulic oil of the rodless cavity flows into the energy accumulator 8 through the first plug valve 10, the pile slipping energy is absorbed by the pile slipping prevention oil cylinder 2, the extra sinking amount delta h2 is the sinking amount of the pile slipping prevention protection of the pile slipping prevention oil cylinder 2, and the value can be controlled within a reasonable range and cannot cause damage to equipment.
The pressure of the accumulator 8 is increased from P1 to P2, if P2 reaches the pressure P3 set by the overflow valve 17, the main valve 16 is opened, after the hydraulic oil overflows through the main valve 16, a part of the hydraulic oil enters the rod cavity of the anti-slide pile oil cylinder 2 through the check valve 15, and a part of the hydraulic oil returns to the oil tank 18 through the valve block T; the two-stage cartridge valve is designed to increase the response speed of the main valve 16, quickly discharge the control oil of the main valve 16 through the second cartridge valve 11 and the relief valve 17, and quickly open the main valve 16. The pile slipping energy is firstly absorbed by the energy accumulator 8, and when the pile slipping energy reaches the set pressure of the overflow valve 17, the pile slipping energy is consumed through overflow of the main valve 16.
In addition, the electromagnetic valves S1 and S2 are both de-energized, and the pressure oil in the accumulator 8 can be discharged to the oil tank 18 by operating the electromagnetic valve S3; the pressure sensors PT1 and PT2 can respectively monitor the pressures of the anti-slide pile oil cylinder 2 and the energy accumulator 8.
The working pressure P1 of the energy accumulator 8 reflects the initial load during pile slipping, the pile slipping energy can be absorbed smoothly by selecting a proper P1 value, the maximum pile slipping load can be set by setting the P3 value of the overflow valve 17, and damage to equipment caused by load damage is prevented. The P1 and P3 values are determined comprehensively according to pile frame 21, pile 20, weight 22, alternate driving, hammering energy and soil texture and by combining construction experience.
From equation (3), it can be seen that to control the slide pile sinking amount, under the condition of certain external construction equipment conditions, the anti-slide pile capability of the pile driving vessel can be calculated by designing and selecting the appropriate anti-slide pile oil cylinder 2, the volume of the energy accumulator 8, the inflation pressure (the slide pile sinking amount can be changed by properly adjusting the lowest working pressure of the energy accumulator 8 within the allowable range), and the like, and if the friction resistance Q on the right side of the slide pile sinking of equation (3) is weakenedfAnd pile tip bearing capacity QRThe influence is 0, and the left side oil cylinder, the initial working pressure P1 of the energy accumulator 8 and the working pressure P3 of the overflow valve 17 are correspondingly strengthened in the equation (3) and the parameter capability design can completely adapt to different geological conditions, so that the pile slipping is in a controlled state.
In the utility model, the anti-slide pile oil cylinder 2 is selected as the device for absorbing the redundant energy of the slide pile, and the problems of small inertia of the oil cylinder, high instant response speed (compared with the method of directly absorbing the energy by a winch) and no damage caused by overlarge starting load of the whole structure are mainly considered.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a pile driver prevents swift current stake system which characterized in that: comprises a winch, a pulley block, an anti-slip pile oil cylinder, an upper pile gripper and a counterweight;
a steel wire rope is wound on the winch and sequentially wound around the pulley block, the upper pile gripper and the balance weight;
the balance weight is arranged below the upper pile gripper;
the anti-sliding pile oil cylinder is connected with the pulley block, and the rodless cavity side of the anti-sliding pile oil cylinder is connected with an energy accumulator through a hydraulic system.
2. The pile driving vessel pile slipping prevention system according to claim 1, wherein: still include pile gripper down, pile gripper is located down the below of counter weight.
3. The pile driving vessel pile slipping prevention system according to claim 1, wherein: the pulley block comprises a fixed pulley block and a movable pulley block;
the fixed pulley block is connected with the rodless cavity side of the anti-slip pile oil cylinder, and the movable pulley block is connected with the rod cavity side of the anti-slip pile oil cylinder.
4. The pile driving vessel pile slipping prevention system according to claim 1, wherein: the hydraulic system comprises a proportional valve PS1, a solenoid valve S1, a solenoid valve S2, a solenoid valve S3, a first cartridge valve, a second cartridge valve, a first balance valve, a second balance valve, a shuttle valve, a one-way valve, a main valve and an overflow valve;
the proportional valve PS1 is used for controlling the anti-slide pile oil cylinder and the energy accumulator;
the rodless cavity side of the anti-slip pile oil cylinder is connected with an energy accumulator through the first cartridge valve;
the second cartridge valve, the main valve and the overflow valve form a safety overflow valve for discharging redundant hydraulic oil into an oil tank;
the first cartridge valve, the shuttle valve, the solenoid valve S1 and the solenoid valve S2 form a one-way hydraulic lock for locking the anti-slide pile oil cylinder;
the electromagnetic valve S3 is used for discharging the hydraulic oil in the accumulator to the oil tank;
the first balance valve and the second balance valve are used for preventing leakage of the anti-slip pile oil cylinder.
5. The pile driving vessel pile slipping prevention system according to claim 4, wherein: pressure sensors are arranged on the anti-slip pile oil cylinder and the energy accumulator;
and the energy accumulator is also provided with a pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220068603.5U CN216865139U (en) | 2022-01-12 | 2022-01-12 | Pile sliding prevention system of pile driving barge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220068603.5U CN216865139U (en) | 2022-01-12 | 2022-01-12 | Pile sliding prevention system of pile driving barge |
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| CN216865139U true CN216865139U (en) | 2022-07-01 |
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| CN202220068603.5U Active CN216865139U (en) | 2022-01-12 | 2022-01-12 | Pile sliding prevention system of pile driving barge |
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