Design method for jack-up rig wharf pile driving positioning

Abstract

The application discloses a self-elevating drilling platform wharf pile driving positioning design method, comprising the following steps: S1, platform construction, before the platform is launched, an independent reference coordinate system is established on the platform, a point on the X axis is determined as a direction point of the platform, and measurement data is obtained through a measuring instrument; S2, according to the measured measurement data, a shape file of the platform is established by using navigation software, and the origin of the reference coordinate system, the direction point and the position of the three-station pile are marked on the shape file; S3, the position of the designed three-station pile is marked on the established CAD diagram, the design positions of the origin and the direction point are calculated, and a direction mark is made by connecting lines, so as to serve as a positioning background diagram; and S4, the navigation software is used to establish a plan survey line with the calculated positions of the origin and the direction point as the starting point and the ending point. The application solves the problem that the positioning error affects the later engineering construction.

Description

TECHNICAL FIELD

[0001] The present application relates to a self-elevating drilling platform wharf pile insertion positioning design method. BACKGROUND

[0002] When the self-elevating drilling platform inserts piles at the wharf position, the personnel need to go from the wharf to the platform through the bridge, so the positioning requirement of the self-elevating platform is very high.

[0003] The conventional method is to pull and position by a tugboat, and then to insert piles. This results in that the platform is not accurately positioned at the wharf pile insertion position, and the distance between the platform and the wharf is uncertain, which leads to not reaching the expected positioning position, and further affects the later engineering construction.

[0004] Therefore, a self-elevating drilling platform wharf pile insertion positioning design method is provided. SUMMARY

[0005] The present application aims to overcome the existing defects and provide a self-elevating drilling platform wharf pile insertion positioning design method, which solves the problem of affecting the later engineering construction due to positioning error.

[0006] The technical solution to achieve the above-mentioned purpose is:

[0007] A self-elevating drilling platform wharf pile insertion positioning design method, comprising:

[0008] Step S1, building a platform, before the platform is launched, an independent reference coordinate system is established on the platform, a point on the X-axis is determined as the direction point of the platform, and measurement data is obtained by measuring instruments;

[0009] Step S2, according to the measured measurement data, a navigation software is used to establish a shape file of the platform, and the origin, direction point and three-station pile position of the reference coordinate system are marked on the shape file;

[0010] Step S3, the designed position of the three-station pile is marked on the established CAD drawing, and the design position of the origin and direction point is calculated and connected to make direction marks, serving as a positioning background drawing;

[0011] Step S4, a navigation software is used to establish a planned measurement line with the calculated origin and direction point positions as the starting point and the ending point;

[0012] Step S5, a GPS is erected at the origin of the platform reference coordinate system, and a fiber compass is placed at a position that has been accurately adjusted;

[0013] Step S6, through the image and the displayed data of the navigation software, the tugboat adjusts the distance from the origin of the platform reference coordinate system to the design origin position and the design direction of the direction point, so that the three-station pile position on the platform coincides with the design position, and then the platform wharf pile positioning is realized.

[0014] Preferably, in the step S1, the measured data comprises the coordinates of the three-station pile and the direction point in the reference coordinate system.

[0015] Preferably, the step S1 comprises:

[0016] Step S11, before the platform is launched, an independent reference coordinate system is established on the platform in advance, the measuring instrument is erected on the coordinate origin of the coordinate system, and another direction point is found on the x-axis of the coordinate system;

[0017] Step S12, the Beidou satellite receiver is positioned at the origin of the reference coordinate system on the platform, and two points are found on land using the Beidou satellite receiver;

[0018] Step S13, the total station instrument is erected on the origin of the reference coordinate system on the platform, one point on land is taken as the zero direction, another point is taken as the checking point, and the direction and the coordinates of the direction point on the x-axis of the reference coordinate system are measured;

[0019] Step S14, the fiber compass for measuring the direction is arranged on the x-axis of the reference coordinate system, the position of the fiber compass is adjusted so that the direction pointed by the fiber compass can be consistent with the measured direction, and the fiber compass is fixed, and then the coordinates of the three-station pile and the direction point in the reference coordinate system are measured.

[0020] Preferably, in the step S11, the axes of the independent reference coordinate system should be close to the axes of the platform and parallel to each other.

[0021] Preferably, in the step S14, the direction of the positive direction of the x-axis is measured on land, the fiber compass is arranged on the x-axis, the direction of the fiber compass is pointed to the positive direction of the x-axis, the direction pointed by the fiber compass is adjusted according to the direction reading displayed by the fiber compass, so that the reading of the fiber compass is consistent with the measured direction of the positive direction of the x-axis, and then the fiber compass is fixed.

[0022] Preferably, in the step S3, the background file of the CAD is established according to the design position of the three-station pile of the platform and the calculated origin position.

[0023] Preferably, after the pile positioning position of the platform wharf is determined, the preparation work before the platform approaches is carried out, which specifically comprises:

[0024] The wind speed, wind direction, flow speed and flow direction that may appear when the platform approaches are grasped;

[0025] According to the wind speed, the wind direction, the flow rate, the flow direction, the approach route is adjusted, the route is kept parallel with the wharf as far as possible, the approach is made against the wind or against the flow, the auxiliary tugboat assists the main tugboat to control the platform to slowly sail on the planned route under the command of the main tugboat, the platform is deviated left and right, when the platform is at 3 nautical miles away from the pile inserting position, the main tugboat is slowed down and the route is controlled, and then the route direction is controlled;

[0026] The platform is fully filled with water before approaching the pile, the platform is basically leveled to meet the angle requirement of less than 0.5 degrees for pile insertion, and the three legs have been lowered to be close to the mud surface by about 1 meter;

[0027] The anchor boat is prepared for throwing anchor at the position where the pile is expected to be inserted.

[0028] Preferably, after the preparation work of the platform is completed, the anchor positioning and pile insertion are performed, and the specific steps include:

[0029] When approaching the position where the pile is expected to be inserted, the anchor chain is thrown by the anchor boat, wherein the anchor throwing sequence is: the anchor of the bow inner row is thrown first, then the anchor of the bow outer row is thrown, then the anchor of the stern inner row is thrown, and finally the anchor of the stern outer row is thrown; the anchor throwing length is: the anchor chain is thrown as long as possible, about 350 meters; the anchor throwing angle is: the inner row is about 30 degrees away from the center line, and the outer row is about 30 degrees away from the center line;

[0030] According to the positioning error of the platform, the length of the anchor chain and the tension of the tow cable are adjusted under the cooperation of the main tugboat and the auxiliary tugboat, the platform is stabilized at the predetermined position by the main tugboat, and in this process, the tension of the anchor chain needs to be monitored at all times, the pulling force of the anchor chain is 40 tons, and the platform positioning conditions are: flat tide, flow rate is not more than 1.5 kn, and wind speed is less than five levels;

[0031] Once the heading of the platform and the position error meet the design requirements, the pile is quickly inserted by gravity;

[0032] When the pile foot is inserted into the mud layer and the ship body starts to rise, each anchor cable is cooperatively loosened;

[0033] After the main ship body is lifted to the predetermined height, the auxiliary tugboat can be unhooked, the main tugboat is not unhooked, according to the normal operation principle, after the pre-pressing is completed, the anchor is lifted, then the tugboat is unhooked, and then the anchor positioning and pile insertion are completed.

[0034] The present application has the advantages that: the present application finds the coordinates of the self-elevating drilling platform through professional navigation software positioning, and makes the coordinate position highly coincide with the expected design positioning coordinate through the dragging cooperation of the wharf tugboat, and then quickly inserts the pile for operation; the positioning time of the tugboat is reduced, the positioning accuracy is improved, and the influence of the positioning error on the later engineering construction is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a flow chart of a wharf pile inserting and positioning design method of a self-elevating drilling platform of the present application;

[0036] Figure 2 is a specific flow chart of measuring data by measuring instruments installed in the present application;

[0037] Figure 3 is a schematic diagram of the shape of the platform and the platform coordinate system in the present application;

[0038] Figure 4 is a schematic diagram of establishing the shape file of the platform by using navigation software in the present application;

[0039] Figure 5 is a pile insertion position diagram of the self-elevating drilling platform in the present application. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be described clearly and completely in combination with the drawings. In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying the importance of the opposite.

[0041] The present application will be further described in combination with the drawings.

[0042] As shown in Figure 1 , a self-elevating drilling platform pier pile positioning design method comprises:

[0043] Step S1, building a platform, before the platform is launched, an independent reference coordinate system is established on the platform in advance, a point on the X-axis is determined as the direction point of the platform, and measurement data is obtained by measuring instruments.

[0044] In the embodiment, the measurement data includes the coordinates of the three-station pile and the direction point in the reference coordinate system.

[0045] As shown in Figure 2 , step S1 specifically comprises:

[0046] Step S11, before the platform is launched, an independent reference coordinate system is established on the platform in advance, the measuring instrument is erected on the coordinate origin of the coordinate system, and another direction point is found on the x-axis of the coordinate system.

[0047] In the embodiment, the axes of the independent reference coordinate system should be close to the axes of the platform and parallel to each other, as shown in Figure 3 , A, B, and C are the positions of the station piles, and O is the origin.

[0048] Step S12, the Beidou satellite receiver is used to locate the origin of the reference coordinate system on the platform, and two points on the land are found by using the Beidou satellite receiver.

[0049] Step S13, the total station is erected on the origin of the reference coordinate system on the platform, and a point on the land is used as the zero direction and another point is used as the checking point to measure the azimuth and coordinates of the direction point on the x-axis of the reference coordinate system.

[0050] Step S14, the fiber compass for measuring the azimuth is arranged on the x-axis of the reference coordinate system, the position of the fiber compass is adjusted so that the direction pointed by the fiber compass can be consistent with the measured azimuth, and the fiber compass is fixed, and then the coordinates of the three-station stake and the direction point in the reference coordinate system are measured.

[0051] In the embodiment, the azimuth of the positive direction of the x-axis is measured on the land, the fiber compass is arranged on the x-axis, the direction of the fiber compass is pointed to the positive direction of the x-axis, the direction pointed by the fiber compass is adjusted according to the azimuth reading displayed by the fiber compass so that the reading of the fiber compass is consistent with the measured azimuth of the positive direction of the x-axis, and then the fiber compass is fixed.

[0052] Step S2, the shape file of the platform is established by using the navigation software according to the measured data, as shown in FIG. 2, and the positions of the origin of the reference coordinate system, the direction point and the three-station stake are marked on the shape file. Figure 4

[0053] Step S3, the positions of the designed three-station stakes are marked on the established CAD diagram, and the design positions of the origin and the direction point are calculated and connected to make direction marks, which are used as the positioning background diagram.

[0054] In the embodiment, the background file of the CAD is established according to the design positions of the three-station stakes of the platform and the calculated position of the origin.

[0055] Step S4, the navigation software is used to establish the planned measuring line with the calculated positions of the origin and the direction point as the starting point and the ending point.

[0056] Step S5, the GPS is erected on the origin of the reference coordinate system of the platform, and the fiber compass is arranged on the position which is accurately adjusted.

[0057] Step S6, the distance between the origin of the reference coordinate system of the platform and the design position of the origin and the design azimuth of the direction point are adjusted by the tugboat through the image and the displayed data of the navigation software, so that the position of the three-station stake on the platform is consistent with the design position, and then the platform wharf stake positioning is realized.

[0058] In the embodiment, after the position of the platform wharf stake is determined, the preparation work before the platform approach is carried out, which specifically includes:

[0059] ​Master the wind speed, wind direction, flow rate, flow direction that will appear when the platform approaches;

[0060] According to the wind speed, wind direction, flow rate, flow direction, adjust the approach route, the route is kept parallel to the wharf as far as possible, approach against the wind or against the flow, the auxiliary tug assists the main tug to control the platform to slowly sail on the planned route under the command of the main tug, control the platform to deviate left and right, when the distance to the pile inserting position is 3 nautical miles, the main tug slows down, and then controls the route heading;

[0061] The platform is fully filled with water before approaching the pile, the platform is basically leveled to meet the angle requirement of less than 0.5 degrees for inserting the pile, and the three legs have been lowered to about 1 meter close to the mud surface;

[0062] The anchor boat is ready to throw the anchor at the position where the pile is expected to be inserted.

[0063] In the embodiment, after the preparation work of the platform is completed before approaching, the anchor positioning and pile inserting are performed, as shown in FIG. 1, and specifically include: Figure 5

[0064] When approaching the position where the pile is expected to be inserted, the anchor boat throws the anchor chain, wherein, the anchor throwing sequence is: first, throw the anchor of the inner row of the bow, then throw the anchor of the outer row of the bow; then throw the anchor of the inner row of the stern, and finally throw the anchor of the outer row of the stern; the anchor throwing length: try to throw the anchor chain length of about 350 meters; the anchor throwing angle: the inner row is about 30 degrees away from the center line, and the outer row is about 30 degrees;

[0065] According to the positioning error of the platform, the length of the anchor chain and the tension of the tow cable are adjusted under the cooperation of the main tug and the auxiliary tug, and the platform is stabilized at the predetermined position by the main tug, and in this process, the tension of the anchor chain needs to be monitored at all times, the tension of the anchor chain is 40 tons, and the platform positioning conditions are: flat tide, flow rate is not more than 1.5 kn, and wind speed is less than five levels;

[0066] Once the heading and position error of the platform meet the design requirements, the pile is quickly inserted by gravity;

[0067] When the pile foot is inserted into the mud layer and the ship body begins to rise, each anchor cable is cooperatively loosened;

[0068] After the main ship body is raised to the predetermined height, the auxiliary tug can be unhooked, the main tug is not unhooked, according to the normal operation principle, after the pre-pressing is completed, the anchor is lifted, and then the tug is unhooked, and then the anchor positioning and pile inserting are completed.

[0069] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.​

Claims

1. A method for designing the positioning of a jack-up drilling platform wharf using pile driving, characterized in that... include: Step S1: Construct a platform. Before the platform is launched into the water, establish an independent reference coordinate system on the platform and determine a point on the X-axis as the orientation point of the platform. Obtain measurement data by measuring instruments. Step S2: Based on the measured data, use navigation software to create a shape file for the platform, and mark the origin, direction point, and positions of the three station stakes of the reference coordinate system on the shape file; Step S3: Mark the locations of the three station piles on the established CAD drawing, and at the same time calculate the design locations of the origin and direction points and connect them to make direction marks, which will serve as the positioning background image. Step S4: Use navigation software to establish the calculated origin and direction points as the starting and ending points of the planned survey line; Step S5: Set up the GPS at the origin of the platform reference coordinate system and place the fiber optic compass in the precisely adjusted position. Step S6: Using the images and displayed data from the navigation software, the tugboat adjusts the distance between the origin of the platform's reference coordinate system and the design origin, as well as the design orientation of the direction point, so that the positions of the three piles on the platform coincide with the design positions, thereby achieving the positioning of the platform wharf pile insertion. In step S1, the measurement data includes the coordinates of the three station stakes and the direction point in the reference coordinate system; Step S1 includes: Step S11: Before the platform is launched into the water, establish an independent reference coordinate system on the platform in advance, set up the measuring instrument at the origin of the coordinate system, and find another direction point on the x-axis of the coordinate system. Step S12: Position the BeiDou satellite receiver on the platform to locate the origin of the reference coordinate system, and use the BeiDou satellite receiver to find two points on land; Step S13: Set up the total station on the origin of the reference system on the platform, take one point on the land as the zero direction and another point as the check point, and measure the azimuth and coordinates of the direction points on the x-axis of the reference coordinate system. Step S14: Place the fiber optic compass for measuring the azimuth on the x-axis of the reference system, adjust the position of the fiber optic compass so that the azimuth it points to is consistent with the azimuth being measured, and fix the fiber optic compass to obtain the coordinates of the three station stakes and the direction point in the reference coordinate system.

2. The design method for positioning and jacking up a drilling platform wharf according to claim 1, characterized in that, In step S11, the axes of the independent reference coordinate system should be close to the axis of the platform and parallel to each other.

3. The design method for positioning and inserting piles at the wharf of a jack-up drilling platform according to claim 1, characterized in that, In step S14, the azimuth of the positive x-axis is measured on land. A fiber optic compass is placed on the x-axis so that its direction points to the positive x-axis. Based on the azimuth reading displayed by the fiber optic compass, the direction pointed to by the fiber optic compass is adjusted so that the fiber optic compass reading is consistent with the measured azimuth of the positive x-axis, and then the fiber optic compass is fixed.

4. The design method for positioning and jacking up a drilling platform wharf according to claim 1, characterized in that, In step S3, a CAD background file is created based on the design location of the three-station piles on the platform and the calculated origin location.

5. The design method for pile positioning of a self-elevating drilling platform wharf according to claim 1, characterized in that, After determining the location for the platform wharf's piling, preparatory work for the platform's entry into the site is carried out, specifically including: Understand the wind speed, wind direction, airflow speed, and airflow direction that will occur when the platform enters the site; Adjust the approach route according to wind speed, wind direction, current speed and current direction, and keep the route as parallel to the dock as possible. Enter the site against the wind or current. The auxiliary tugboat, under the command of the main tugboat, assists the main tugboat in controlling the platform to slowly navigate on the planned route and controls the platform to yaw left and right. When the distance to the pile position is 3 nautical miles, the main tugboat slows down and retracts, thereby controlling the course of the route. Before the platform was brought to the site, all the pile boots were filled with water. The platform was basically leveled to meet the requirement that the pile insertion angle be less than 0.5 degrees, and the three legs were lowered to within 1 meter of the mud surface. The anchored vessel should prepare to anchor at the location where the bollards are to be dropped.

6. The design method for pile positioning of a jack-up drilling platform wharf according to claim 5, characterized in that, After the preparatory work for the platform's entry into the site is completed, anchoring, positioning, and stake driving will be carried out, specifically including: When approaching the expected stake placement, the anchored vessel will drop its anchor chain. The order of dropping the anchor is as follows: first, drop the anchor near the inner bow; then drop the anchor near the outer bow; next, drop the anchor near the inner stern; and finally, drop the anchor near the outer stern. The anchor chain length should be at least 350 meters. The anchor angle should be 30 degrees from the centerline for both the inner and outer bows. Based on the platform's positioning error, with the cooperation of the main tugboat and auxiliary tugboats, the length of the anchor chain and the tension of the tow cable are adjusted. The main tugboat stabilizes the platform in the predetermined position. During this process, the tension of the anchor chain must be monitored at all times. The anchor chain tension is 40 tons. The platform positioning conditions are: slack tide, current speed not exceeding 1.5 knots, and wind speed below level 5. Once the platform's heading and positional errors meet the design requirements, it can be quickly driven into piles by its own weight. As the piles are inserted into the mud and the hull begins to rise, the anchor cables are loosened in coordination. After the main hull is raised to the predetermined height, the auxiliary tow line is released while the main tow line remains unreleased. Following normal operating procedures, the tow line is released after the preloading is completed and the anchor is raised, thus completing the anchoring and stake insertion.

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