CN106948366A - A kind of barrel base and accessory part and construction method for being easy to control perpendicularity - Google Patents

Abstract

The invention discloses a barrel-shaped foundation, an auxiliary component and a construction method which are convenient to control the verticality. The positioning sleeve of the top plate of the barrel body, the upper end of the barrel body is provided with an inlet and outlet valve connected with the pumping system; the auxiliary components include a triangular positioning frame and three positioning steel piles driven vertically into the seabed by using it; the barrel-shaped foundation is movable Set on three positioning steel piles, the barrel sinks into the sea to touch the seabed and penetrate to the design depth. The invention transforms the verticality problem in the sinking process of the barrel foundation into the verticality problem of the positioning steel piles. As long as the verticality of the positioning steel piles meets the requirements, the verticality of the barrel foundation automatically meets the requirements without subsequent leveling and correction , so that the construction process of the barrel foundation is greatly simplified, the construction difficulty is greatly reduced, the offshore operation time is shortened, and the construction cost is reduced.

Description

Bucket foundation, auxiliary components and construction method for convenient verticality control

Technical field:

The invention relates to foundations for offshore platforms and offshore wind turbines, in particular to a suction barrel foundation, and in particular to a barrel foundation, auxiliary components and a construction method that are convenient for verticality control.

Background technique:

The barrel foundation was produced in Norway in the 1990s. It is a circular plate foundation with a skirt. Because of its characteristics of reducing engineering volume, saving investment, shortening offshore construction time, and being reusable, it has been gradually used to In the foundation of offshore platforms and offshore wind turbines.

The barrel-shaped foundation needs to be kept vertical during the sinking process. If a certain degree of inclination occurs, it needs to be leveled to keep it vertical, otherwise its function will be affected. Reference [1] introduced the barrel foundation construction of an oilfield in the Bohai Sea. During the construction process, the barrel foundation was tilted, the barrel wall had excessive deformation and cracks, and soil plugging was serious, which led to the failure of the barrel foundation construction. end. It can be seen that how to effectively control and maintain the verticality in the barrel foundation sinking process is one of the key technologies in the barrel foundation construction process.

In particular, the configurations of barrel foundations are becoming more and more diverse. For example, Chinese Patent Announcement Nos. CN205742258U, CN205857222U, CN205444224U, CN204940320U, CN205188994U, CN204626445U, etc. disclose a variety of new barrel-shaped foundation configurations. These designs enrich the functions of the barrel-shaped foundation, but also increase the barrel-shaped foundation to a certain extent Shen through the construction difficulty. The various design configurations of the current barrel foundations have little consideration for the convenience and feasibility of the construction process.

If some auxiliary structures that are convenient for construction are added to the structure of the barrel foundation to ensure the verticality of the barrel foundation sinking and shorten the offshore construction time, the construction difficulty and construction cost of the barrel foundation can be greatly reduced, thereby promoting the construction of the barrel foundation. Application of fundamentals in engineering. It can be seen that it is necessary to explore the barrel foundation configuration suitable for offshore construction and promote the innovation and progress of the existing barrel foundation construction technology.

References: [1] Zhang Yifei. Case Analysis of Tube Foundation Installation Failure [J]. Shipbuilding Technology, 2014, 6:16-19.

Invention content:

In order to make up for the deficiencies of the existing technical problems, the purpose of the present invention is to provide a bucket foundation and auxiliary components and a construction method that are convenient to control the verticality. Three positioning sleeves are evenly arranged on the bucket foundation, which can guide the bucket foundation vertically It penetrates directly into the seabed, which is convenient for sinking construction.

Technical scheme of the present invention is as follows:

The barrel-shaped foundation and auxiliary components that are convenient to control the verticality are characterized in that it includes the barrel-shaped foundation, the main body of the barrel-shaped foundation is an inverted barrel, and the inner wall of the barrel is provided with three positioning holes that are evenly distributed along the ring and penetrate the top plate of the barrel Sleeve, the upper end of the barrel body is provided with an inlet and outlet valve connected to the pumping system;

The auxiliary assembly includes a triangular positioning frame and three positioning steel piles vertically driven into the seabed by means of the triangular positioning frame;

The barrel-shaped foundation is movable set on three positioning steel piles, and the barrel is sunk into the sea to contact the seabed and penetrate to the design depth.

The barrel-shaped foundation and auxiliary components that are convenient to control the verticality are characterized in that three positioning sleeves that clamp each other at 120° in pairs are welded to the inner wall of the barrel, and the upper part of the positioning sleeves is higher than the top plate of the barrel body. The lower port of the positioning sleeve is in the shape of a knife pointing to the barrel wall, and the upper end surface of the barrel body is also provided with an inlet and outlet valve connected with the pumping system.

The barrel-shaped foundation and auxiliary components that are convenient to control the verticality are characterized in that the triangular positioning frame is formed by welding steel pipes between three sleeves, and two reinforcing ribs are arranged up and down at each welding place, The center distance between the sleeves is equal to the center distance between the three positioning sleeves on the barrel body.

The barrel-shaped foundation and auxiliary components that are convenient to control the verticality are characterized in that the positioning steel pile is composed of a bottom section of the positioning steel pile and a plurality of standard sections of the positioning steel pile connected and assembled sequentially from bottom to top, and the positioning The lower end of the bottom section of the steel pile is provided with a tapered pile tip, and the upper end of the bottom section of the positioning steel pile is provided with a threaded connection hole;

One end of the positioning steel pile standard section is provided with a threaded tenon, and the other end of the positioning steel pile standard section is also provided with a threaded connection hole. The threaded tenon and the threaded connection hole match each other. By screwing the threaded tenon of the positioning steel pile standard section into the bottom The threaded connection holes of joints or other standard joints can be fixed and connected with each other.

The barrel-shaped foundation and auxiliary components that are convenient to control verticality are characterized in that the inner diameter of the positioning sleeve on the barrel body is equal to the inner diameter of the sleeve on the triangular positioning frame, and the inner diameter of the two is greater than the outer diameter of the positioning steel pile by 1 ~2cm.

A method for constructing barrel-shaped foundations and auxiliary components convenient for verticality control, characterized in that it includes the following steps:

1) Drive in the first positioning steel pile:

According to the design parameters, the threaded tenon is screwed into the threaded connection hole, and the bottom section of a positioning steel pile is assembled with multiple standard sections of the positioning steel pile to form a positioning steel pile, which is vertically driven into the first sea area in the designated sea area. Root positioning steel pile;

2) Drive in the other two positioning steel piles:

Put a sleeve of the triangular positioning frame around the first positioning steel pile that has been laid, and then drive the other two positioning steel piles into the seabed based on the restriction and positioning of the other two sleeves, and finally make the three positioning steel piles Parameters such as the center distance, plumbness, and soil penetration depth of the positioning steel piles meet the design requirements;

3) Set into the barrel foundation:

Take out the triangular positioning frame from the three positioning steel piles, lift the barrel so that the three positioning sleeves cover the three positioning steel piles and sink gradually. piles, and slowly sink the barrel into the sea along the positioning steel piles until it touches the seabed;

4) The barrel foundation penetrates into the seabed:

Open the pumping system connected to the water inlet and outlet valves of the barrel to draw negative pressure, so that the barrel penetrates into the seabed along the positioning steel piles to the design depth under the action of its own weight and negative pressure;

5) Remove part of the positioning steel piles:

Take out the triangular positioning frame from the three positioning steel piles, and rotate, unscrew and remove the standard sections of the positioning steel piles above the top surface of the barrel body one by one, and keep the positioning steel piles below the top surface of the barrel body to complete the barrel. Body foundation sinking construction.

The beneficial effects of the present invention are:

1. In the present invention, three vertical and hollow positioning bushings are arranged on the inner wall of the barrel. The size of the positioning bushings is small. This auxiliary structure will not significantly increase the difficulty of making and sinking the barrel-shaped foundation, and is economical and practicality;

2. The present invention transforms the verticality problem in the barrel foundation sinking process into the verticality problem of the positioning steel piles. As long as the verticality of the three positioning steel piles meets the requirements, the verticality of the barrel foundation automatically meets the requirements, and there is no need to Subsequent leveling and correction; the verticality of the positioning steel piles is easier to achieve, thus reducing the construction difficulty of the barrel foundation as a whole;

3. After the construction of the barrel-shaped foundation of the present invention is completed, the positioning steel piles below the top surface of the barrel-shaped foundation continue to be retained, which can continuously position and restrict the barrel-shaped foundation, ensuring the verticality of the barrel-shaped foundation in the subsequent use process, Obviously good for engineering.

Description of drawings:

Fig. 1 is a top view of the bucket foundation of the present invention.

Fig. 2 is a bottom view of the bucket foundation of the present invention.

Fig. 3 is a cross-sectional view of the bucket foundation of the present invention.

Fig. 4 is a schematic diagram of positioning steel pile accessories and assembly of the present invention.

Fig. 5 is a schematic structural diagram of the triangular positioning frame of the present invention.

Fig. 6 is a schematic diagram of the first positioning steel pile constructed in the present invention.

Fig. 7 is a schematic diagram of the completion of construction of three positioning steel piles of the present invention.

Fig. 8 is a schematic diagram of inserting three positioning steel piles into the barrel foundation of the present invention.

Fig. 9 is a schematic diagram of the barrel foundation of the present invention penetrating into the seabed.

Fig. 10 is a schematic diagram of the completion of construction of the barrel foundation of the present invention.

Explanation of reference signs: 1. Bucket body; 2. Inlet and outlet water valve; 3. Positioning sleeve; 4. Bottom section of positioning steel pile; 5. Tapered pile tip; 6. Threaded connection hole; 7. Standard section of positioning steel pile ; 8. Thread tenon; 9. Triangular positioning frame; 10. Sleeve; 11. Reinforced rib; A, sea level; B, seabed surface.

detailed description:

See attached picture:

A barrel-shaped foundation and auxiliary components that are easy to control verticality, including a barrel body 1 and positioning sleeves 3, three positioning sleeves 3 are welded symmetrically and uniformly on the inner wall of the barrel-shaped foundation barrel 1, and the construction is based on triangular positioning Three vertical positioning steel piles are drilled in advance on the frame 9, and then the three positioning sleeves 3 of the barrel-shaped foundation are covered with the three positioning steel piles and sunk into the sea to contact the seabed. The foundation penetrates into the seabed to the design depth, and the verticality of the barrel-shaped foundation can be automatically satisfied throughout the process, thus forming a new type of barrel-shaped foundation that is convenient for construction.

The inner wall of the barrel-shaped foundation barrel 1 is symmetrically and evenly welded with three positioning sleeves 3, the upper part of the positioning sleeve 3 penetrates and is higher than the top plate of the barrel-shaped foundation, and the lower part of the positioning sleeve 3 is in the shape of a blade pointing to the barrel wall. It facilitates the sinking of the barrel foundation, as shown in Figure 1 and Figure 2.

The connection between the three positioning sleeves 3 on the barrel body 1 and the central axis is 120°, as shown in Figure 3: the positioning sleeve 3 is connected to the inner wall of the barrel by welding, and its lower part is in the shape of a knife edge, which can reduce the resistance of penetration. It is convenient for construction. The top of the positioning sleeve 3 is higher than the top plate of the barrel-shaped foundation, which has no influence on the sealing of the inside of the barrel. Three positioning sleeves 3 are designed to make use of the stability of the triangle to make the overall stability of the subsequent three positioning steel piles meet the construction requirements.

The positioning steel pile is assembled by a positioning steel pile bottom section 4 and a plurality of positioning steel pile standard sections 7, one end of the positioning steel pile bottom section 4 is a conical pile tip 5, and the other end of the positioning steel pile bottom section 4 is A hollow section with a built-in thread 6 inside, one end of the standard section 7 of the positioning steel pile is a threaded tenon 8, and the other end of the standard section 7 of the positioning steel pile is a hollow section with a built-in thread 6 inside, the threaded tenon 8 and the built-in thread 6 Mutual matching, by screwing the threaded tenon 8 of the positioning steel pile standard section 7 into the built-in thread 6 of the bottom section 4 or other standard sections 7 to achieve mutual fixation and connection, as shown in Figure 4.

Generally, the bottom section 4 of the positioning steel pile has the same length as the standard section 7 of the positioning steel pile. The positioning steel pile standard section 7 can be standardized, normalized, and scaled to meet the needs of different depths in different situations. The extension and continuation of the positioning steel pile are realized by screwing the threaded tenon 8 and the built-in thread 6 into each other.

The role of positioning steel piles is mainly to guide the barrel foundation to penetrate into the seabed vertically. During the construction process, the horizontal load and vertical load it receives are small, so its cross-sectional size does not need to be too large, as long as it can maintain the vertical position of the barrel foundation. degree can be. Although it is called "positioning steel pile", it actually belongs to "positioning steel rod". Preferably, the outer diameter of the positioning steel pile is 10-25cm.

The triangular positioning frame 9 is welded with steel pipes between three sleeves 10, and two reinforcing ribs 11 are arranged up and down at each welding place. The center distances between the 3 are equal, as shown in Figure 5. The hollow inner diameter of the positioning sleeve 3 on the barrel body 1 is equal to the inner diameter of the sleeve 10 on the triangular positioning frame 9, and the hollow inner diameter of the positioning sleeve 3 on the barrel 1 is 1-2 cm larger than the outer diameter of the positioning steel pile.

The function of the triangular positioning frame 9 is to accurately locate and limit the position of the three positioning steel piles, so that the three positioning steel piles are inserted into the seabed in a vertical state, and the distance between the central axes of the three positioning steel piles is the three positioning steel piles on the barrel body 1. The distance between the central axes of casing 3.

In fact, during the construction process, a plurality of triangular positioning frames 9 can be used as needed to perform positioning constraints on the three positioning steel piles at different positions, so as to ensure the verticality and accurate position of the positioning steel piles. Only when the verticality and spacing of the three positioning steel piles meet the requirements can the verticality of the subsequent barrel foundation be guaranteed. The positioning steel piles should have sufficient strength and rigidity to maintain the plumb characteristics of the barrel foundation during the construction process.

It can be seen that this technology transforms the verticality requirements of ensuring the barrel foundation into the verticality requirements of positioning steel piles, and various types of steel piles have rich construction experience, and the verticality of positioning steel piles is relatively easy to achieve, so as to reduce the difficulty of barrel foundation construction the goal of.

The hollow inner diameter of the positioning sleeve 3 is 1 to 2 cm larger than the outer diameter of the positioning steel pile, so that the barrel-shaped foundation can be placed on the positioning steel pile and slide into the seabed smoothly. In order to reduce mutual friction, lubricant can even be applied on the inner wall of the positioning sleeve 3 and the outer wall of the positioning steel pile.

A construction method for barrel foundations and auxiliary components that facilitates verticality control, described in detail as follows:

1) Drive in the first positioning steel pile:

According to the design parameters, the threaded tenon 8 is screwed into the built-in thread 6, and a positioning steel pile bottom section 4 is assembled with a plurality of positioning steel pile standard sections 7 to form a positioning steel pile. Drive the first positioning steel pile vertically in the designated sea area, as shown in Figure 6.

Parameters such as plumbness and soil penetration depth of positioning steel piles meet the design requirements. Generally, the penetration depth of positioning steel piles should be greater than the sinking depth of the barrel foundation.

2) Drive in the other two positioning steel piles:

Put a sleeve 10 of the triangular positioning frame 9 around the first positioning steel pile that has been laid, and then drive the other two positioning steel piles into the seabed based on the restriction and positioning of the other two sleeves 10, Finally, the parameters such as the center distance, plumbness, and soil depth of the three positioning steel piles meet the design requirements, as shown in Figure 7.

The sinking posture of the barrel foundation depends on the guidance and restraint of the positioning steel piles, so the positioning steel piles should be able to resist various loads during the construction process without side shifting and inclination, and the strength of each component should be able to withstand the combination under complex working conditions. Under the action of load, buckling and deformation do not occur, and the vertical state can still be maintained.

3) Set into the barrel foundation:

Take out the triangular positioning frame 9 from the three positioning steel piles, lift the barrel-shaped foundation so that the three positioning sleeves 3 cover the three positioning steel piles and gradually sink, and then place the triangular positioning frame 9 after the positioning steel piles expose the top surface of the barrel-shaped foundation. Set it on three positioning steel piles, and make the barrel-shaped foundation slowly sink into the sea along the positioning steel piles until it touches the seabed, as shown in Figure 8.

Timely covering the three positioning steel piles with the triangular positioning frame 9 is to maintain the verticality of the positioning steel piles. When the three positioning steel piles are assembled together, the overall rigidity is greater, so as to avoid inclination of individual positioning steel piles due to local loads during the process.

4) The barrel foundation penetrates into the seabed:

Open the pumping system connected to the inlet and outlet valve 2 of the barrel foundation to extract negative pressure, so that the barrel foundation penetrates into the seabed along the positioning steel piles to the design depth under the action of its own weight and negative pressure, as shown in Figure 9.

When the verticality of the three positioning steel piles meets the requirements, the barrel-shaped foundation penetrates into the seabed along the three positioning steel piles, and its verticality automatically meets the requirements, and there is no need for leveling and repeated checks during the construction process. The construction process is greatly simplified, the construction difficulty is greatly reduced, and the offshore operation time is shortened, thereby reducing the construction cost.

5) Remove part of the positioning steel piles:

Take out the triangular positioning frame 9 from the three positioning steel piles, and rotate, unscrew and remove the positioning steel pile standard section 7 above the top surface of the barrel foundation one by one, and keep the positioning steel piles below the top surface of the barrel foundation , so as to complete the sinking construction of the barrel foundation, as shown in Figure 10.

After the barrel foundation is sunk in place, the positioning steel piles that are higher than the top surface of the barrel foundation will affect the subsequent construction and also affect the waterway in this area, so they need to be removed; during the design process of the positioning steel piles, it is necessary to consider the subsequent lifting, Removal needs, reversely unscrew the built-in thread 6 through the threaded tenon 8 to realize the removal of the standard section 7 of the positioning steel pile. However, the positioning steel piles below the top surface of the barrel foundation do not need to be removed, which will not affect the subsequent construction, and retaining this section is beneficial to maintaining the verticality of the barrel foundation in the subsequent work process.

In the present invention, three vertical and positioning sleeves are arranged on the inner wall of the barrel, and the size of the positioning sleeves is small. This auxiliary structure will not significantly increase the difficulty of making and sinking the barrel-shaped foundation, and is economical and practical; The verticality problem in the barrel foundation sinking process is transformed into the verticality problem of the positioning steel piles. As long as the verticality of the three positioning steel piles meets the requirements, the verticality of the barrel foundation automatically meets the requirements without subsequent leveling and correction; the verticality of the positioning steel piles is easier to achieve, thus reducing the construction difficulty of the barrel foundation as a whole.

The present invention is not limited to the above-mentioned specific implementation methods. According to the above-mentioned content, according to the common technical knowledge and conventional means in this field, without departing from the above-mentioned basic technical idea of the present invention, the present invention can also make other equivalent forms. Amendments, substitutions or alterations all fall within the protection scope of the present invention.

Claims (6)

1. A barrel-shaped foundation and auxiliary components that are convenient to control verticality, characterized in that it includes a barrel-shaped foundation, the main body of the barrel-shaped foundation is an inverted barrel, and the inner wall of the barrel is provided with three evenly distributed along the ring, penetrating the barrel The positioning sleeve of the top plate of the barrel body, the upper end of the barrel body is provided with an inlet and outlet valve connected with the pumping system; The auxiliary assembly includes a triangular positioning frame and three positioning steel piles vertically driven into the seabed by means of the triangular positioning frame; The barrel-shaped foundation is movable set on three positioning steel piles, and the barrel is sunk into the sea to contact the seabed and penetrate to the design depth. 2. The barrel-shaped foundation and auxiliary components that are convenient to control the verticality according to claim 1, characterized in that, the inner wall of the barrel is welded with three positioning sleeves that clamp each other at 120° in pairs, and the upper part of the positioning sleeves Higher than the top plate of the barrel body, the lower port of the positioning sleeve is in the shape of a knife pointing to the barrel wall, and the upper end surface of the barrel body is also provided with an inlet and outlet valve connected with the pumping system. 3. The barrel-shaped foundation and auxiliary components that are convenient to control verticality according to claim 1, wherein the triangular positioning frame is formed by welding steel pipes between three sleeves, and each welding point is arranged up and down Two reinforcing ribs, the center distance between the sleeves is equal to the center distance between the three positioning sleeves on the barrel body. 4. The barrel-shaped foundation and auxiliary components that are convenient to control the verticality according to claim 1, wherein the positioning steel pile is composed of a bottom section of the positioning steel pile and a plurality of standard sections of the positioning steel pile from bottom to top Connected and assembled sequentially, the lower end of the bottom section of the positioning steel pile is provided with a tapered pile tip, and the upper end of the bottom section of the positioning steel pile is provided with a threaded connection hole; One end of the positioning steel pile standard section is provided with a threaded tenon, and the other end of the positioning steel pile standard section is also provided with a threaded connection hole. The threaded tenon and the threaded connection hole match each other. By screwing the threaded tenon of the positioning steel pile standard section into the bottom The threaded connection holes of joints or other standard joints can be fixed and connected with each other. 5. The barrel-shaped foundation and auxiliary assembly convenient to control verticality according to claim 1, characterized in that, the inner diameter of the positioning sleeve on the barrel body is equal to the inner diameter of the sleeve on the triangular positioning frame, and the inner diameters of the two are greater than The outer diameter of the positioning steel pile is 1~2cm. 6. A construction method for a bucket foundation and auxiliary components that is convenient to control verticality, is characterized in that, comprises the steps: 1) Drive in the first positioning steel pile: According to the design parameters, the threaded tenon is screwed into the threaded connection hole, and the bottom section of a positioning steel pile is assembled with multiple standard sections of the positioning steel pile to form a positioning steel pile, which is vertically driven into the first sea area in the designated sea area. Root positioning steel pile; 2) Drive in the other two positioning steel piles: Put a sleeve of the triangular positioning frame around the first positioning steel pile that has been laid, and then drive the other two positioning steel piles into the seabed based on the restriction and positioning of the other two sleeves, and finally make the three positioning steel piles Parameters such as the center distance, plumbness, and soil penetration depth of the positioning steel piles meet the design requirements; 3) Set into the barrel foundation: Take out the triangular positioning frame from the three positioning steel piles, lift the barrel so that the three positioning sleeves cover the three positioning steel piles and sink gradually. piles, and slowly sink the barrel into the sea along the positioning steel piles until it touches the seabed; 4) The barrel foundation penetrates into the seabed: Open the pumping system connected to the water inlet and outlet valves of the barrel to draw negative pressure, so that the barrel penetrates into the seabed along the positioning steel piles to the design depth under the action of its own weight and negative pressure; 5) Remove part of the positioning steel piles: Take out the triangular positioning frame from the three positioning steel piles, and rotate, unscrew and remove the standard sections of the positioning steel piles above the top surface of the barrel body one by one, and keep the positioning steel piles below the top surface of the barrel body to complete the barrel. Body foundation sinking construction.