High-pile wharf precast pile sinking precision control system and method

Abstract

The invention provides a high-pile wharf precast pile sinking precision control system and method which are suitable for the field of high-pile wharf construction, and provides a corresponding high-pile wharf precast pile sinking precision control method which comprises the steps of ship body coarse positioning, guide frame fine positioning, monitoring point position arrangement, pile hoisting and stabilizing, pile sinking process monitoring and rock entering process control. Position posture information and stress information of a pile body in the rock entering process are collected, the deviation condition of the pile body is judged, pre-deviation pile moving operation is carried out accordingly, the perpendicularity and position precision of the pile core position in the pile sinking process meet the design requirements, the influence of oblique rock on the precision of the pile body is eliminated through the pile sinking construction mode, and the construction efficiency is improved. And the underwater secondary operation amount with insufficient precision after pile sinking is reduced to the maximum extent, and the corresponding construction efficiency and construction cost are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of high-pile wharf construction, and in particular to a high-pile wharf precast pile sinking precision control system and method. Background Art

[0002] In the construction process of high-pile docks, the construction of precast piles is a crucial link. As the vertical supporting member of the dock structure, the verticality and accurate pile position of the precast piles are directly related to the stability, bearing capacity and subsequent safety of the entire dock. However, there are usually many inclined rocks in the rock strata of the selected location of the high-pile dock. During the pile sinking process, the precast piles should be mainly subjected to vertical downward impact force. However, once they encounter inclined rocks, the direction of the force generated at the contact point between the inclined rocks and the bottom of the pile changes. Not only does the vertical reaction force hinder the sinking of the pile, but also a strong horizontal reaction force is generated. The horizontal reaction force produces a moment that causes the pile body to tilt. As the pile sinking process proceeds, the inclination angle and irregular shape of the inclined rock continue to affect the stress state of the pile body, further aggravating the degree of pile deflection, which brings great difficulties to the quality control and construction progress of the high-pile dock project. In the prior art, after encountering inclined rocks that cause the pile body to tilt, the method of post-secondary adjustment is mainly adopted, but this post-secondary adjustment method has complex construction steps and huge time cost. Summary of the invention

[0003] The purpose of the present invention is to overcome the above problems and provide a high-pile wharf precast pile sinking accuracy control system and method, which can quickly and timely control the pile body accuracy during the high-pile wharf pile sinking process to ensure that the pile body finally reaches the verticality and accuracy required by the design.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A high-pile wharf precast pile sinking precision control system comprises a precast pile state monitoring module, a control module and an execution module. The precast pile state monitoring module is used to collect precast pile state information in real time and send it to the control module. The precast pile state information comprises position coordinate information of the precast pile sinking process and clamping force information of the guide frame on the precast pile. The control module receives the precast pile state information, calculates the final displacement prediction value of the pile center of the precast pile in real time according to the precast pile state information, analyzes and judges according to the size of the final displacement prediction value, sends corresponding instructions to the execution module according to the judgment result, and the execution module executes alarm and precision control countermeasures according to the received instructions.

[0006] Furthermore, a method for controlling the sinking accuracy of precast piles in a high-pile wharf comprises the following steps:

[0007] S101 hull rough positioning;

[0008] The rough positioning of the hull includes starting the hull to transport the prefabricated piles to the pile sinking position area, twisting and releasing the sail rope and completing the position and direction adjustment of the hull;

[0009] S102 guide frame precision positioning;

[0010] The guide frame is precisely positioned, including adjusting the position and verticality of the precast pile guide frame so that the guide frame points to the vertical direction and the center of the guide frame coincides with the pile center of the precast pile, and the error is within the design allowable range; the guide frame adopts a double-layer tic-tac-toe structure, each layer of the tic-tac-toe structure is composed of longitudinal beams and transverse beams in a tic-tac-toe shape to clamp the precast pile, and the layer spacing between the double-layer tic-tac-toe structures is d;

[0011] S103 monitoring point arrangement;

[0012] The monitoring point arrangement includes arranging position coordinate monitoring points on the surface of the precast pile body, which are used to monitor the sinking position coordinate information of the pile body during the pile sinking process;

[0013] The monitoring point arrangement also includes arranging four precast pile clamping force monitoring points on the lower layer of the well-shaped structure of the guide frame, which are used to monitor the clamping force of the well-shaped structure on the precast pile in four horizontal directions during the pile sinking process, and the clamping forces in the four horizontal directions all point to the center of the well-shaped structure;

[0014] S104 hoisting and stabilizing piles;

[0015] The lifting and stabilizing of the pile includes lifting the prefabricated pile using a lifting device, adjusting the lifting device to insert the prefabricated pile into the guide frame, making the prefabricated pile stand vertically on the water surface, and slowly lowering the prefabricated pile into the water and implanted;

[0016] S105 pile sinking process monitoring;

[0017] The monitoring of the pile sinking process includes using a vibrating hammer to hit the precast pile so that it sinks into the soil layer and the rock layer, and using the position coordinate monitoring point to collect position coordinate information at time intervals t during the pile sinking process, and combining the precast pile length information to calculate the extension length h from the bottom of the precast pile to the bottom of the guide frame in real time;

[0018] The monitoring of the pile sinking process also includes collecting the horizontal clamping force information of the guide frame on the precast pile during the driving process using the clamping force monitoring point while collecting the position coordinate information, and combining d and h to calculate in real time the magnitude and direction of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the driving process;

[0019] The pile sinking process monitoring further includes using the horizontal reaction force F to calculate the deflection value x corresponding to the precast pile in real time and monitoring it in real time. The deflection value x is calculated using formula (1):

[0020]

[0021] Where E is the elastic modulus of the precast pile, and I is the section moment of inertia of the precast pile;

[0022] S106 rock entry process control;

[0023] The rock entry process control includes real-time monitoring of the deflection value x of the rock entry process and making judgments and controls. The rock entry process is a process from the bottom of the prefabricated pile contacting the inclined rock to the bottom of the prefabricated pile basically flattening the inclined rock. The judgments and controls include:

[0024] a) if x is less than the pile position deviation value corresponding to the pile body verticality allowable error, the pile sinking process is continued, wherein the pile position deviation value corresponding to the pile body verticality allowable error is calculated by multiplying the pile body verticality allowable error by the pile length;

[0025] b) If x is greater than or equal to the pile position deviation value corresponding to the pile body verticality allowable error and less than the pile position allowable deviation, the current x value is recorded as x 偏 , and issue an alarm message 1, notifying to stop the current pile sinking process, and adopt the reverse pile moving method to eliminate the influence of the inclined rock on the inclination and displacement of the prefabricated piles; after eliminating the influence, continue the pile sinking operation at the designed pile position;

[0026] c) If x is greater than or equal to the allowable deviation of the pile position, an alarm message 2 is issued to notify the current pile sinking process to stop, and an underwater operation method is used to directly eliminate the influence of the inclined rock at the current pile position on the inclination of the pile body.

[0027] Furthermore, in step S105, the magnitude of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the pile sinking process is calculated using formula (2):

[0028]

[0029] Among them, f1, f2, f3, and f4 are the values ​​of horizontal clamping force measured in real time at four clamping force monitoring points, where f1 is in opposite directions to f3, and f2 is in opposite directions to f4.

[0030] Furthermore, the steps of the reverse pile moving method in step S106 are as follows:

[0031] a) Pull out the prefabricated pile from the current pile position, adjust the position of the guide frame, and make the center of the guide frame deviate from the designed pile center by the distance x 偏 , the deviation direction is the opposite direction of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the injection process calculated in step S105;

[0032] b) Sink the piles at the new offset position, sink the piles to a depth of about 1 / 2 the pile diameter based on the current pile depth, and then stop sinking the piles;

[0033] c) Pull out the precast pile from the current pile position, adjust the center of the guide frame to realign it with the designed pile center, and continue sinking the pile on the inclined rock platform chiseled out in step b).

[0034] The beneficial effects of the present invention are as follows:

[0035] The present invention provides a pile driving precision control system and control method for precast piles at a high-pile wharf. Aiming at the problem that the pile body is tilted due to inclined rocks during the pile driving process, the position and posture information and force information of the pile body entering the rock are collected to judge the deviation of the pile body, and analysis and judgment are performed accordingly. The pre-biased pile moving operation is performed according to the judgment result, which will cause the precast pile to be excessively tilted and the inclined rock to be offset to be flattened, so that the verticality and position accuracy of the pile driving process returning to the pile core position meet the design requirements, and the pile driving construction method itself is used to eliminate the influence of the inclined rock on the pile body accuracy, and the amount of underwater secondary operations with insufficient accuracy after pile driving is minimized, thereby greatly improving the corresponding construction efficiency and construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart of a method for controlling the precision of precast piles in high-pile docks provided by the present invention;

[0037] Figure 2 A schematic diagram of a pile sinking process of a method for controlling the pile sinking accuracy of precast piles at a high-pile dock according to an embodiment of the present invention;

[0038] In the figure, 1-the tic-tac-toe structure of the upper layer of the guide frame, 2-the tic-tac-toe structure of the lower layer of the guide frame, 3-the outer contour of the pile body, 4-the outer contour of the pile body after entering the rock, 5-the inclined rock boundary line, 6-the inclined rock boundary line newly chiseled during the rock entering process. DETAILED DESCRIPTION

[0039] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention, and cannot be used to limit the present invention.

[0040] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also have other implementations and variations thereof. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0041] like Figures 1-2As shown, a high-pile wharf precast pile sinking precision control system includes a precast pile state monitoring module, a control module and an execution module. The precast pile state monitoring module is used to collect precast pile state information in real time and send it to the control module. The precast pile state information includes position coordinate information of the precast pile sinking process and clamping force information of the guide frame on the precast pile. The control module receives the precast pile state information, calculates the final deviation prediction value of the pile center of the precast pile in real time according to the precast pile state information, analyzes and judges according to the size of the final deviation prediction value, and sends corresponding instructions to the execution module according to the judgment result. The execution module executes alarm and precision control countermeasures according to the received instructions.

[0042] As an embodiment of the present invention, a method for controlling the precision of precast piles in a high-pile wharf comprises the following steps:

[0043] S101 hull rough positioning;

[0044] The rough positioning of the hull includes starting the hull to transport the prefabricated piles to the pile sinking position area, twisting and releasing the sail rope and completing the position and direction adjustment of the hull;

[0045] S102 guide frame precision positioning;

[0046] The guide frame is precisely positioned, including adjusting the position and verticality of the precast pile guide frame so that the guide frame points to the vertical direction and the center of the guide frame coincides with the pile center of the precast pile, and the error is within the design allowable range; the guide frame adopts a double-layer tic-tac-toe structure, each layer of the tic-tac-toe structure is composed of longitudinal beams and transverse beams in a tic-tac-toe shape to clamp the precast pile, and the layer spacing between the double-layer tic-tac-toe structures is d;

[0047] S103 monitoring point arrangement;

[0048] The monitoring point arrangement includes arranging position coordinate monitoring points on the surface of the precast pile body, which are used to monitor the sinking position coordinate information of the pile body during the pile sinking process;

[0049] The monitoring point arrangement also includes arranging four precast pile clamping force monitoring points on the lower layer of the well-shaped structure of the guide frame, which are used to monitor the clamping force of the well-shaped structure on the precast pile in four horizontal directions during the pile sinking process, and the clamping forces in the four horizontal directions all point to the center of the well-shaped structure;

[0050] S104 hoisting and stabilizing piles;

[0051] The lifting and stabilizing of the pile includes lifting the prefabricated pile using a lifting device, adjusting the lifting device to insert the prefabricated pile into the guide frame, making the prefabricated pile stand vertically on the water surface, and slowly lowering the prefabricated pile into the water and implanted;

[0052] S105 pile sinking process monitoring;

[0053] The monitoring of the pile sinking process includes using a vibrating hammer to hit the precast pile so that it sinks into the soil layer and the rock layer, and using the position coordinate monitoring point to collect position coordinate information at time intervals t during the pile sinking process, and combining the precast pile length information to calculate the extension length h from the bottom of the precast pile to the bottom of the guide frame in real time;

[0054] The monitoring of the pile sinking process also includes collecting the horizontal clamping force information of the guide frame on the precast pile during the driving process using the clamping force monitoring point while collecting the position coordinate information, and combining d and h to calculate in real time the magnitude and direction of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the driving process;

[0055] The pile sinking process monitoring further includes using the horizontal reaction force F to calculate the deflection value x corresponding to the precast pile in real time and monitoring it in real time. The deflection value x is calculated using formula (1):

[0056]

[0057] Where E is the elastic modulus of the precast pile, and I is the section moment of inertia of the precast pile;

[0058] S106 rock entry process control;

[0059] The rock entry process control includes real-time monitoring of the deflection value x of the rock entry process and making judgments and controls. The rock entry process is a process from the bottom of the prefabricated pile contacting the inclined rock to the bottom of the prefabricated pile basically flattening the inclined rock. The judgments and controls include:

[0060] a) if x is less than the pile position deviation value corresponding to the pile body verticality allowable error, the pile sinking process is continued, wherein the pile position deviation value corresponding to the pile body verticality allowable error is calculated by multiplying the pile body verticality allowable error by the pile length;

[0061] b) If x is greater than or equal to the pile position deviation value corresponding to the pile body verticality allowable error and less than the pile position allowable deviation, the current x value is recorded as x 偏 , and issue an alarm message 1, notifying to stop the current pile sinking process, and adopt the reverse pile moving method to eliminate the influence of the inclined rock on the inclination and displacement of the prefabricated piles; after eliminating the influence, continue the pile sinking operation at the designed pile position;

[0062] c) If x is greater than or equal to the allowable deviation of the pile position, an alarm message 2 is issued to notify the current pile sinking process to stop, and an underwater operation method is used to directly eliminate the influence of the inclined rock at the current pile position on the inclination of the pile body.

[0063] Furthermore, in step S105, the magnitude of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the pile sinking process is calculated using formula (2):

[0064]

[0065] Among them, f1, f2, f3, and f4 are the values ​​of horizontal clamping force measured in real time at four clamping force monitoring points, where f1 is in opposite directions to f3, and f2 is in opposite directions to f4.

[0066] Furthermore, the steps of the reverse pile moving method in step S106 are as follows:

[0067] a) Pull out the prefabricated pile from the current pile position, adjust the position of the guide frame, and make the center of the guide frame deviate from the designed pile center by the distance x 偏 , the deviation direction is the opposite direction of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the injection process calculated in step S105;

[0068] b) Sink the piles at the new offset position, sink the piles to a depth of about 1 / 2 the pile diameter based on the current pile depth, and then stop sinking the piles;

[0069] c) Pull out the precast pile from the current pile position, adjust the center of the guide frame to realign it with the designed pile center, and continue sinking the pile on the inclined rock platform chiseled out in step b).

[0070] The precast pile is constrained by the guide frame. When the pile is driven, the bottom of the pile body is subjected to an instantaneous horizontal force F. The bottom of the pile is simultaneously driven vertically downward and bent horizontally. The driving condition of the bottom of the pile body into the inclined rock is as shown in Figure 2 The newly carved out inclined rock boundary line during the pile sinking process.

[0071] When the deflection value x is greater than or equal to the pile position deviation value corresponding to the allowable error of the verticality of the pile body and is less than the allowable deviation of the pile position, precision control is required. The reverse pile movement method is adopted and the pile is sunk to a depth of about 1 / 2 of the pile diameter to ensure that the inclined rock at the original pile center position is basically flattened by the pile bottom. After the pile is moved back to the original position, the horizontal reaction force of the rock layer on the pile bottom is basically eliminated, ensuring that the deviation value of the pile is within the allowable range; when x is greater than or equal to the allowable deviation of the pile position, the horizontal reaction force on the pile body is too large, and the pile body is at risk of breaking. It is necessary to stop pile driving at this position, and take measures to directly eliminate the influence of the inclination and deviation of the pile body on the inclined rock by underwater action.

[0072] Taking a fishing port project in eastern Africa assisted by my country as an example, in this embodiment, the diameter of the hollow circular tube pile is 800mm, the pile length is 27m, the allowable deviation of the pile position is 1 / 2 of the pile diameter, i.e. 400mm, the allowable error of the verticality of the pile body is 1 / 200, and the pile position deviation value corresponding to the allowable error of the verticality of the pile body is 135mm; when the deflection value is less than 135mm, the pile sinking construction continues; when the deflection value is greater than or equal to 135mm and less than 400mm, the reverse pile moving method is used to eliminate the influence of the inclined rock on the inclination and deviation of the pile body; when the deflection value is greater than 400mm, there is a risk of fracture of the pile body, and it is necessary to stop the pile sinking at this position, and take measures to directly eliminate the influence of the inclination and deviation of the pile body by underwater action on the inclined rock; based on the above parameter indicators and the values ​​of the horizontal clamping force measured at the four clamping force monitoring points, the pile end deflection value x can be predicted in real time to further control the pile sinking.

[0073] Please note that the above patent content is only an example. When actually applying for an invention patent, it is necessary to further improve the technical details, conduct rigorous experimental verification and various tasks required by the patent review process to ensure the validity and innovativeness of the patent.

[0074] It should be understood that the above-mentioned embodiments are multiple embodiments of the present invention, and there are many other embodiments and variations thereof based on the present invention; the variations and modifications made by ordinary technicians in this industry through the present invention without making pioneering innovations all fall within the scope of protection of the present invention.

Claims

1. A high-pile wharf precast pile sinking precision control system, characterized in that: include: The precast pile status monitoring module is used to collect the precast pile status information in real time and send it to the control module; The precast pile state information includes position coordinate information of the precast pile during the pile sinking process and clamping force information of the guide frame on the precast pile; A control module is used to receive the precast pile status information, calculate the final displacement prediction value of the pile center of the precast pile in real time according to the precast pile status information, analyze and judge according to the size of the final displacement prediction value, and send corresponding instructions to the execution module according to the judgment result; The execution module executes alarm and precision control countermeasures according to the received instructions.

2. A method for controlling the sinking accuracy of precast piles at a high-pile dock, applied to the control system for the sinking accuracy of precast piles at a high-pile dock according to claim 1, characterized in that: The following steps are involved: S101 hull rough positioning; The rough positioning of the hull includes starting the hull to transport the prefabricated piles to the pile sinking position area, twisting and releasing the sail rope and completing the position and direction adjustment of the hull; S102 guide frame precision positioning; The guide frame is precisely positioned, including adjusting the position and verticality of the precast pile guide frame so that the guide frame points to the vertical direction and the center of the guide frame coincides with the pile center of the precast pile, and the error is within the design allowable range; the guide frame adopts a double-layer tic-tac-toe structure, each layer of the tic-tac-toe structure is composed of longitudinal beams and transverse beams in a tic-tac-toe shape to clamp the precast pile, and the layer spacing between the double-layer tic-tac-toe structures is d; S103 monitoring point arrangement; The monitoring point arrangement includes arranging position coordinate monitoring points on the surface of the precast pile body, which are used to monitor the sinking position coordinate information of the pile body during the pile sinking process; The monitoring point arrangement also includes arranging four precast pile clamping force monitoring points on the lower layer of the well-shaped structure of the guide frame, which are used to monitor the clamping force of the well-shaped structure on the precast pile in four horizontal directions during the pile sinking process, and the clamping forces in the four horizontal directions all point to the center of the well-shaped structure; S104 hoisting and stabilizing piles; The lifting and stabilizing of the pile includes lifting the prefabricated pile using a lifting device, adjusting the lifting device to insert the prefabricated pile into the guide frame, making the prefabricated pile stand vertically on the water surface, and slowly lowering the prefabricated pile into the water and implanted; S105 pile sinking process monitoring; The monitoring of the pile sinking process includes using a vibrating hammer to hit the precast pile so that it sinks into the soil layer and the rock layer, and using the position coordinate monitoring point to collect position coordinate information at time intervals t during the pile sinking process, and combining the precast pile length information to calculate the extension length h from the bottom of the precast pile to the bottom of the guide frame in real time; The monitoring of the pile sinking process also includes collecting the horizontal clamping force information of the guide frame on the precast pile during the driving process using the clamping force monitoring point while collecting the position coordinate information, and combining d and h to calculate in real time the magnitude and direction of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the driving process; The pile sinking process monitoring further includes using the horizontal reaction force F to calculate the deflection value x corresponding to the precast pile in real time and monitoring it in real time. The deflection value x is calculated using formula (1): Where E is the elastic modulus of the precast pile, and I is the section moment of inertia of the precast pile; S106 rock entry process control; The rock entry process control includes real-time monitoring of the deflection value x of the rock entry process and making judgments and controls. The rock entry process is a process from the bottom of the prefabricated pile contacting the inclined rock to the bottom of the prefabricated pile basically flattening the inclined rock. The judgments and controls include: a) if x is less than the pile position deviation value corresponding to the pile body verticality allowable error, the pile sinking process is continued, wherein the pile position deviation value corresponding to the pile body verticality allowable error is calculated by multiplying the pile body verticality allowable error by the pile length; b) If x is greater than or equal to the pile position deviation value corresponding to the pile body verticality allowable error and less than the pile position allowable deviation, the current x value is recorded as x 偏 , and issue an alarm message 1, notifying to stop the current pile sinking process, and adopt the reverse pile moving method to eliminate the influence of the inclined rock on the inclination and displacement of the prefabricated piles; after eliminating the influence, continue the pile sinking operation at the designed pile position; c) If x is greater than or equal to the allowable deviation of the pile position, an alarm message 2 is issued to notify the current pile sinking process to stop, and an underwater operation method is used to directly eliminate the influence of the inclined rock at the current pile position on the inclination of the pile body.

3. A method for controlling the precision of precast piles in high-pile docks according to claim 2, characterized in that: In step S105, the magnitude of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the pile sinking process is calculated using formula (2): Among them, f1, f2, f3, and f4 are the values ​​of horizontal clamping force measured in real time at four clamping force monitoring points, where f1 is in opposite directions to f3, and f2 is in opposite directions to f4.

4. A method for controlling the precision of precast piles in high-pile docks according to claim 2, characterized in that: The steps of the reverse pile moving method in step S106 are: a) Pull out the prefabricated pile from the current pile position, adjust the position of the guide frame, and make the center of the guide frame deviate from the designed pile center by the distance x 偏 , the deviation direction is the opposite direction of the horizontal reaction force F of the inclined rock on the bottom of the precast pile during the injection process calculated in step S105; b) Sink the piles at the new offset position, sink the piles to a depth of about 1 / 2 the pile diameter based on the current pile depth, and then stop sinking the piles; c) Pull out the precast pile from the current pile position, adjust the center of the guide frame to realign it with the designed pile center, and continue sinking the pile on the inclined rock platform chiseled out in step b).

Images