JPS5850213A - Erection of panel by floating crane - Google Patents

Abstract

PURPOSE:To avoid the application of tortional force to panel structures by speicifically moving a floating crane hanging a panel as the panel is erected when erecting large-size trapezoidal panels constituting the jacket of an oil drilling rig, etc. CONSTITUTION:Under a condition that the barge B of a crane 1 is positioned on the extended line of one inclined side A on the erecting side of a panel A, one inclined side A' is hung up and moved along the circular line of the crane 1 at the crossing point (as center) between one inclined side A' and other inclined side A'' on the grounded side while regulatively moving the crane 1 in such a way that targets 4 and 5 provided to the panel A are in line with targets 2 and 3 provided to the crane 1 on the same level. The barge B and the crane 1 are displaced to an imaginary place and the erection of the panel A is completed.

Description

[Detailed Description of the Invention] The present invention relates to the creation of a method for erecting panels using a floating crane such as a marine crane, and the use of a marine crane to properly erect, lift, and install panels. 4. We are trying to obtain a TI method that can accurately produce items such as large-sized jackets.

The Jikiket method has long been known as one of the rounding methods for forming oil drilling rigs, etc., and has nine and four ro, but in order to manufacture a large jacket in such a case, each row has traditionally been made into a panel, 4 panels are manufactured in a three-dimensional assembly position, the panels are erected using several land cranes such as large crawler cranes, and installed at the i position, and a single piece of material is used between these panels. They are connected and assembled by mounting. But this↓
According to the conventional wisdom, land-based cranes generally have limited work capacity and cannot be used to lift panels, so panel production must be done at the three-dimensional assembly position. Panels that are assembled in sequential order are fabricated and then erected after completion for three-dimensional assembly.The production area is obstructed by the preceding panel until it is erected, that is, the fabrication and assembly of the preceding panel is completed. However, even with the best panel method, it is not possible to start manufacturing the next adjacent panel until the panel is installed. has disadvantages such as being difficult to adjust. As mentioned above, in structures such as large jackets and steel towers used for oil drilling and rigs, the lower part is generally large and the upper part becomes smaller, so the panels are It is often made into a trapezoidal shape, and when erecting such a trapezoidal panel, if one side of the panel is lifted up, the short side will be pulled up rapidly, whereas the long side will be lifted up. The speed is quite slow (the pulling radius on the short side is small, while the pulling radius on the long side is large), so the difference in pulling speed can be When this occurs, a strong lifting force acts on the short side during the lifting process, while the long side remains in contact with the ground, causing a torsion to act on the panel and ensuring that it is not connected with sufficient strength. There is a high possibility that the connecting parts of the panel components will be damaged or deformed during the erection process.

In other words, in the case of a trapezoidal panel like this one, the above [
U) It is necessary to build up so as not to give force,
In the prior art, there is no solution that appropriately solves this kind of relationship.

The present invention has been devised after repeated studies in view of the above-mentioned circumstances, and uses a floating crane to erect panels such as the upper part. °We propose setting targets on each side of the axis of the floating body of the crane, and erecting the panel while adjusting the movement of the floating crane so that these four targets are all located on a straight line. It is something.

In other words, according to floating cranes, umbrellas are used to move the crane by using a floating platform floating on the sea, and the cranes used have sufficiently large angles. For example, a crane with a capacity of 3,000 tons or more can be used, so even panels such as large jackets as mentioned above can be lifted sufficiently. At the same time, it is relatively easy to adjust the position on the water clay/side by using the buoyancy of the floating platform.In the present invention, this unique relationship is effectively utilized to advantageously erect the panel. This is something that we succeeded in trying to achieve. The embodiments of the invention according to the present invention will be described with reference to the accompanying drawings.
In the land area A, the remote village plans to use a crane 1 with a floating body B floating on water such as the sea to erect the bunel of the jacket, and in this case, on the axis of the floating body B. multiple targets 2
．． 3, and targets 4.5 as shown in FIG. 3 are provided on both ends of panel A. Regarding the target 4.5 in the panel A, the panel A is erected, hoisted and set in a predetermined position, and these hoistings are carried out in a manner that allows them to act as an appropriate target even during the movement process. A nine-fold weight 4 is suspended from a bendable strip.
It is preferable to use a, Sm, etc. in any process. Regarding the movement and setting operation of the panel, one of the requirements of the present invention is to operate it under the condition that the panel is lifted as described above, and also to set the panel at a predetermined position by moving the panel as appropriate in 1 tsp. Another requirement is to do so. However, with regard to lifting, in special cases, it is natural that panel A can be erected and operated with one side of it in contact with the ground without completely detaching it, and also on the floating body B side, the target Regarding 2 and 3, there is no need to attach a special target member, and the corner of an appropriate member of floating body B or crane 1 can be substituted for targets 2 and 3, and this is the same for panel A@. be. In any case, it is necessary to use a plurality of targets 2, 3, or 4.5 on the floating body B or clay 71 side and on the panel A side, respectively, so that the appropriate direction can be defined in any case. Demai, Mata Crane 1
By appropriately moving the sides, it is possible to align both directions on the same straight line. Regarding the lifting position WIK of panel A in the crane 1, it may be a single lifting position, but in this case, an auxiliary direction regulating operation by an appropriate auxiliary worker etc. is required on the panel A side. is common, that is, it is necessary to appropriately correct the direction of the lifted banelm by an auxiliary worker to bring it into position and to bring each target 2, 3 and 4.5 into the same straight line. In contrast, as shown in Fig. 1 or Fig. 2.3, a plurality of cranes are set with lifting points 6.7 along the axial direction, and the number of hanging pieces 8.7 in the panel is set. When lifting at point s, the lifted panel is automatically aligned with the thin line direction of the crane mouth. Note that the crane 1 installed on the floating platform B is generally fixed to the floating platform B in this type of floating crane, and the present invention can be applied appropriately even under such conditions where the crane arm is fixed.・It is possible to always use Targets 2 and 3 to accurately control sand throwing, especially on floating platform B.

The above-mentioned structure according to the present invention can be suitably implemented even in the case of a large-sized jacket of this type, which has a trapezoidal shape on the side and has a nine-panel construction. That is, as mentioned above, in the case of this trapezoidal panel, torsional force acts upon it when it is erected, and there is a high risk of damage, but in the present invention using a floating crane, first, as shown in FIG. With the floating platform B of the crane 1 positioned on the elongated line of the - side hypotenuse A' on the lifting side of the panel to be erected, the - side hypotenuse A'
′ is lifted, and as the lifting progresses, the panel, which forms a symmetrical trapezoid, lies sideways on the ground. The crane 1 is moved along a horizontal arc line as shown by the arrow in Fig. 4, centering on the intersection O of The erection is completed in the displaced state. That is, in this way, only an appropriate i-shape can be obtained at least in the case of a trapezoidal panel in which the dimensional difference between the long side and the short side is relatively small.

Furthermore, if the dimensional difference in the trapezoidal panel A is relatively large, using the method shown in Figure 5.6 in addition to the method described above will make it possible to substantially apply torsional force to one panel. No erection is obtained. That is, in this case, the relationship of a parallelogram is adopted with respect to the target 4°5 used for the panelum, and therefore, regarding its short side, the intersection of the short side A' and the short side is A target 5 having a weight is attached, and on the long side, the intersection point of a straight line drawn from the attachment point of the target 5 in the middle part and substantially parallel to the other oblique side of the ground side forms a set of 40 targets. . In special cases, the target 4 may be mounted at the intersection of the long side and one oblique side, or at a position close to the intersection, and in some cases, the target 5 may be mounted on the extension of the corresponding short side. That is, if this is done, the area formed by one side M', the targets 4 and S hanging down from each attachment point, and the straight line connecting these target attachment points will form a parallelogram shape. each targetera) 2,
If the relationship between 3 and 4.5 is established in the same vertical plane, the generation of torsional force can be effectively eliminated.
Ru.

Furthermore, in order to more preferably eliminate the torsional force, the hanging pieces 8 and 9 on panel A should be installed near the hanging positions of the targets 4 and 5 as described above. By raising the trapezoidal panel in the same manner as when raising the quadrilateral panel, smooth erection can be achieved with the lifting speed at each lifting point 6.7 of the crane 1 being the same.

Also, when erecting and operating large panel A, lift point 6
．． As shown in FIG. 6, it is preferable to make the interval 7 relatively large. In the case of a large jacket panel such as the one described above, if the deviation in the mounting position of the targets 4 and 5 is about 300 cm, erection can be accomplished with almost no practical problems.

According to the present invention as described above, a large jacket is created by using a water crane, providing a plurality of targets on the panel and the crane, and moving the clay side so that these targets are all in the same plane. It is possible to smoothly erect the panels of Japanese umbrellas, and when erecting them, almost no torsional force is generated even on trapezoidal panels, which are easily damaged by the torsional force acting on the large umbrella. This invention has great industrial effects because it depends on proper erection under such operating conditions.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the operating state according to the present invention, FIG. 2 is a plan view thereof,
Figure 3 is an explanatory diagram of the target placement relationship on that panel, Figure 9) is a plan view showing the relationship between the erection and operation of the trapezoidal panel, and Figure 5 is an explanatory diagram showing the target mounting relationship on that panel in a vertical state. Fig. 6 is a side view showing the state in the middle of being erected. However, in these drawings, A is a panel, B#'i floating platform, 1 is a crane, 2.3 is a crane target, 4 is a
．． 5 is a target on the panel side, 6.1 is a hanging point, and a and S are hanging pieces. Patent applicant Nippon Kokan Co., Ltd. Inventor Takashi Hosono / No. 11 ■ @tflll 411

Claims (1)

[Claims] 1. A plurality of targets are arranged on the panel side and a water crane side, respectively, and the panel is erected while adjusting the movement of the water crane so that these targets are all in the same horizontal plane. A method for erecting panels using a floating crane. 2. A patent claim for installing and erecting targets arranged in front and behind a trapezoidal panel so that the straight line connecting the target attachment points and the hypotenuse on the grounding side of the trapezoidal panel are approximately parallel to each other. A method for erecting panels using a floating crane as described in Scope 1. 3. The method for erecting a panel according to claim 2, wherein the hanging pieces of the panel are set near each target attachment position and lifted up by a crane.