SU1700138A1 - Design and erection of artificial deep-water island - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to increase the carrying capacity of the backbone under the action of horizontal loads on it, simplifying its installation and reducing construction time. Artificial island designs are made of two types of caissons. The bottom row sections of the caisson are made with vertical tubular elements 6 with through holes. The artificial island was erected, first flooding the lower row caisson — the base 4 with sections made with vertical guide columns 5, and then the subsequent caissons so that the vertical columns entered the through holes of tubular elements 6. 2 s.p. .f-ly, 2 Il.

Description

17 L / F LTLUZH / L LULUZHLU 27 / 7JrW.

Fig /

The invention relates to the hydraulic engineering of offshore stationary structures and can be used in the construction of the foundation for drilling operations in offshore oil and gas fields in harsh climatic conditions.

The purpose of the invention is to increase the carrying capacity of the island under the action of horizontal loads on it, simplifying installation and construction time.

FIG. 1 shows an island, a general view; in fig. 2 - the same, top view.

The design of a deep-sea artificial island consists of a fencing structure made of caissons 1, consisting of sections 2, stacked one on top of the other, and backfilling of a soil 3 internal cavity. The lower row of caisson sections is the base A of the closed loop structure. The sections of the caisson of the bases h are made with the vertical guide columns 5 monolithic in them. All the overlying rows of caissons are made of sections, each of which is equipped with vertical tubular elements 6 passing through each section of the caissons 1, are made in such a way that they protect the inner caisson cavity from the penetration of water into it. The upper ends of the vertical guide columns are positioned below the water level by the amount of precipitation of the floating caissons 1. The caissons are arranged relative to each other in such a way that the vertical guide columns 5 of the base 1 penetrate all the overlying rows of rows 1 through the through holes. Moreover, all the rows of caissons are laid by lacing the seams. For this, the caissons 1 are designed in such a way that the distances between the axes of the holes of the tubes of the tubular elements 6 of the two sections 2 of the caissons 1 installed correspond to the distances between the axes of the holes of the tubes of the tubular elements of one section of the caisson 1. To ensure structural rigidity and ballasting floating inside the caissons arrange partitions 7.

The method is carried out as follows.

After being manufactured at a coastal base in factory caissons. 4

0

five

0

five

0

five

0

five

1 and 4 they are transported afloat to the construction site. A closed enclosing structure was erected from the delivered caissons 1 and k by filling them with water and placing them on the bottom. The caisson k is first flooded with vertical guide columns 5 forming the bottom row of the stack. Then the caissons 1 of the overlying rows are exposed over the vertical columns 5 and flooded so that the vertical columns 5 enter the through holes of the vertical and tubular elements 6 of the caisson 1. Moreover, to carry out the stitching, each overlying course of the caissons 1 is placed with a movable half the length of the caisson relative to the underlying row. After installing each of the rows of caissons, the cavities of caissons 1 and C and the internal cavity of the erected structure are filled with backfill soil 3 with the help of dredging pumps widely used in hydraulic engineering construction.

The proposed design of an artificial island allows to increase the bearing capacity of the structure to the effect of horizontal loads, eliminates the possibility of shifting the caissons relative to each other due to the use of rigid connections between masonry courses and stitching seams. Ta-4 in this way, use this design at greater depths (from 10 or more).

In the proposed method of constructing an artificial island, divers are used only when installing the lower course of the caissons, while the remaining overlying caissons are flooded along the guide columns, which eliminates the use of labor of divers and the complicated system of positioning the caissons. in turn, it leads to a reduction in the cost of construction, as well as to a reduction in the construction time.

Claims (2)

1. The design of a deep-sea artificial island, including enclosing structure, consisting of a section | of the caissons, the lower one and the base of which are laid in rows in height and form a closed contour, and the internal cavity of the closed contour and cavity of the sections of the caissons are filled with backfilling soil, different from that. that, in order to increase the carrying capacity of the island under the action on horizontal loads, simplify its installation and reduce the construction time, each section of the lower row of the caisson is made with vertical guide columns, the upper ends of which are made flooded by caisson precipitation, and the section of the caissons the overlying rows are provided with vertical tubular elements installed in the cavity of each section along the entire height and connected with guide columns, while the distance between the outer holes the adjacent sections of caissons of one row correspond to the distances between the axes of the tubular elements of one section of the caisson, and the sections of caissons of one row are radially displaced relative to sections of caissons neighboring below and above. lying rows 2. The method of erection of a deep-sea artificial island, including transportation of caissons afloat to the construction site, installation of a fencing structure by flooding caissons, filling caissons and the internal cavity of the structure with backfill soil, characterized in that the caisson is first flooded, sections of which are made with vertical guide columns Then, the caissons of the subsequent rows alternately float the barn with vertical guide pillars and flood with a radial displacement relative to but the previous rows so that the vertical guides fit into the through holes of the tubular elements of the caissons, and the filling of the cavities of the caissons and the internal space of the structure with soil is carried out as the structure is increased in height. 7 7