CN113605344B - Deepwater foundation combined drilling platform and erection method - Google Patents

Abstract

The invention provides a deepwater foundation combined drilling platform which comprises a plurality of drilling platform starting units, wherein the drilling platform starting units are connected into a whole by steel pipes, and the drilling platform starting units are formed by assembling a jacket and a steel apron. The invention solves the technical problem that the drilling platform is difficult to set up under the poor geological conditions such as bare rock of an inclined rock face and the like, the bottom of the jacket adopts the steel apron and the underwater non-discrete concrete foundation, the jacket and the steel apron form a whole, and the combined platform and the seabed surface bedrock form a whole by pouring the underwater non-discrete concrete to achieve a stable system of wind resistance, surge resistance and current resistance, and the structure stability is good.

Description

Deepwater foundation combined drilling platform and erection method

Technical Field

The invention belongs to the technical field of drilling platform design and construction, and particularly relates to a deepwater foundation combined drilling platform and a building method.

Background

At present, the sea bed is in the working condition of shallow or no cover layer (bare rock area) in the construction process of constructing straddling and bay bridges at home and abroad, and the technical problems of difficult pile sinking and difficult construction of a construction platform exist under the poor geological conditions of large surface layer fluctuation height difference, large rock face inclination and the like and the severe natural environment construction conditions of wind, wave, current, tidal range and the like. Therefore, a platform easy to construct and a platform erecting method are required to be experimentally studied.

Disclosure of Invention

In view of the above, the invention aims to overcome the defects in the prior art, and provides a deepwater foundation combined drilling platform and a setting-up method.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

the deepwater foundation combined drilling platform comprises a plurality of drilling platform starting units, wherein the drilling platform starting units are connected into a whole by utilizing steel pipes, and the drilling platform starting units are formed by assembling a jacket and a steel apron.

Further, the jacket comprises a plurality of vertically arranged conduit rods, and the conduit rods are connected and fixed by connecting rods.

A method for erecting a deepwater foundation combined drilling platform comprises the following steps:

processing jacket rod pieces and steel apron rod pieces, and assembling the platform structure rod pieces into a plurality of drilling platform initial unit structures;

transporting the assembled drilling platform starting unit structure to the pier position by utilizing a weather window, and lowering the assembled drilling platform starting unit structure to the pier position;

cleaning the seabed surface corresponding to the drilling platform starting unit in the steel apron, checking the seabed surface of the seabed after cleaning, plugging a gap between the steel apron and the seabed surface, and finally pouring underwater non-discrete concrete in the cofferdam;

after the underwater non-discrete concrete reaches the strength, quickly erecting a temporary working platform on the jacket, placing a drilling machine on the temporary working platform, constructing an anchor pile in the steel pipe pile, and dismantling the temporary working platform after the anchor pile is completed;

according to the arrangement of the pier position bored piles, continuously adopting the steps to finish the lowering of the structures of the platform starting units, and connecting the structures to the whole by utilizing steel pipes;

and finally, installing a construction operation platform at the upper part of the drilling platform.

Further, before the processing of the platform structural rod piece, sea sweeping is carried out on the seabed surface, and after the topography condition of the seabed surface is cleared, the size of the processing platform rod piece is determined according to the actual topography of the seabed surface.

Further, the floating crane is utilized to integrally hoist and lower the platform starting unit structure.

Further, the seabed surface is cleaned up by adopting a gas lift method in the steel apron.

Further, underwater non-discrete concrete is poured into the cofferdam by adopting a conduit method.

Compared with the prior art, the invention has the following advantages:

the invention solves the technical problem that the drilling platform is difficult to set up under the poor geological conditions such as bare rock of the inclined rock face, the bottom of the jacket adopts the steel apron and the underwater non-discrete concrete foundation, not only solves the stability problem of the jacket platform under the inclined rock face, but also performs platform-resisting reinforcement on the construction platform through the underwater non-discrete concrete and the seabed surface as a whole, and adapts to the construction conditions of severe natural environments such as wind, waves, currents, tidal range and the like. The platform construction method is simple and convenient to operate, high in efficiency, high in popularization and application value and good in social benefit.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute an undue limitation on the invention. In the drawings:

FIG. 1 is a schematic diagram of a drilling platform initiation unit in accordance with the present invention;

FIG. 2 is a top view of a drilling platform initiation unit according to the present invention;

FIG. 3 is a schematic plan view of the present invention in use for creating a drilling platform.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

A deepwater foundation combined drilling platform is shown in figures 1 to 3 and comprises a plurality of drilling platform starting units, wherein the drilling platform starting units are connected into a whole by connecting rods, and the connecting rods are generally made of steel pipes. The drilling platform starting unit is formed by assembling a jacket 1 and a steel apron 2, concrete 3 is filled in the steel apron, and an anchor pile 4 is constructed at the lower end of the jacket so as to ensure that the drilling platform starting unit is stable in structure. Typically, the jacket includes a plurality of vertically disposed conduit members connected and secured by connecting rods.

The following provides a method for setting up a deepwater foundation combined drilling platform, which comprises the following steps: firstly, processing jacket rod pieces and steel apron rod pieces, and assembling the platform structure rod pieces into a plurality of drilling platform initial unit structures;

transporting the assembled drilling platform initial unit structure to the pier position by utilizing a weather window, and integrally lifting and lowering the platform initial unit structure to the pier position by utilizing a floating crane;

cleaning the corresponding seabed surface in the steel apron by adopting a gas lift method, checking the seabed surface at the seabed after cleaning, plugging a gap between the steel apron and the seabed surface, and finally pouring underwater non-discrete concrete in the cofferdam by adopting a conduit method;

after the underwater non-discrete concrete reaches the strength, quickly erecting a temporary working platform on the jacket, placing a drilling machine on the temporary working platform, constructing an anchor pile in the steel pipe pile, and dismantling the temporary working platform after the anchor pile is completed;

according to the arrangement of the pier position bored piles, continuously adopting the steps to finish the lowering of the structures of the platform starting units, and connecting the structures to the whole by utilizing steel pipes;

and finally, installing a construction operation platform at the upper part of the drilling platform.

Before the processing of the platform structural rod piece, sea sweeping is carried out on the seabed surface, and after the topography condition of the seabed surface is cleared, the size of the processing platform rod piece is determined according to the actual topography of the seabed surface.

The drilling platform provided by the invention fully utilizes the characteristics of the integral jacket, the jacket and the steel apron form a whole, the combined platform and the seabed bedrock form a stable system which is integrally wind-resistant, surge-resistant and flow-resistant through pouring the underwater non-discrete concrete, the structural stability is good, when the drilling platform is erected, the assembled combined platform steel structure is transported to a pier position by utilizing a weather window, the floating crane is used for integrally lifting and rapidly lifting and lowering, and the bottom sealing concrete is rapidly poured, so that a stable structure can be rapidly achieved, and the problem of erecting the drilling platform under complex natural conditions is solved.

The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. The method for erecting the deepwater foundation combined drilling platform comprises a plurality of drilling platform starting units, wherein each drilling platform starting unit is connected into a whole by utilizing a steel pipe, and the drilling platform starting units are formed by assembling a jacket and a steel apron; the jacket comprises a plurality of vertically arranged conduit rods, and the conduit rods are connected and fixed by connecting rods; the method is characterized by comprising the following steps of:

processing a guide pipe rod piece and a steel apron part, and assembling the platform structural parts into a plurality of drilling platform initial unit structures; before the platform structural component is processed, sea sweeping is carried out on the seabed surface, and after the topography condition of the seabed surface is cleared, the size of the processed platform structural component is determined according to the actual topography of the seabed surface;

transporting the assembled drilling platform starting unit structure to the pier position by utilizing a weather window, and lowering the assembled drilling platform starting unit structure to the pier position;

cleaning the seabed surface corresponding to the drilling platform starting unit in the steel apron, checking the seabed surface of the seabed after cleaning, plugging a gap between the steel apron and the seabed surface, and finally pouring underwater non-discrete concrete in the cofferdam by adopting a conduit method;

after the underwater non-discrete concrete reaches the strength, quickly erecting a temporary working platform on the jacket, placing a drilling machine on the temporary working platform, constructing an anchor pile in the guide pipe rod piece, and dismantling the temporary working platform after the anchor pile is completed;

according to the arrangement of the pier position bored piles, continuously adopting the steps to finish the lowering of the structures of the platform starting units, and connecting the platform starting units into a whole by utilizing steel pipes; the floating crane is used for integrally lifting and lowering the platform starting unit structure, the floating crane is integrally lifted and quickly lifted and lowered, and bottom sealing concrete is quickly poured, so that a stable structure is quickly achieved;

and finally, installing a construction operation platform at the upper part of the drilling platform.

2. The method for erecting a deepwater foundation combined drilling platform according to claim 1, wherein the method comprises the following steps of: the seabed surface is cleaned up by adopting a gas lift method in the steel apron.