CN210827539U

CN210827539U - Thick wall concrete cylindrical foundation with spiral injection device

Info

Publication number: CN210827539U
Application number: CN201921196578.3U
Authority: CN
Inventors: 付登锋; 刘润; 练继建; 汪嘉钰
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-06-23
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a thick wall concrete section of thick bamboo type basis with spiral injection device, the device plant a plurality of spiral auxiliary piles at section of thick bamboo type basis lateral wall, through control helical blade at mud face internal rotation, produce decurrent injection force, this injection force passes through flange and circular steel sheet and transmits to section of thick bamboo type basis to drive section of thick bamboo type basis and inject downwards, sink to preset position.

Description

Thick wall concrete cylindrical foundation with spiral injection device

Technical Field

The utility model belongs to the technical field of the ocean engineering, concretely relates to thick wall concrete section of thick bamboo type basis with spiral injection device.

Background

The energy crisis is increasingly prominent when people enter the 21 st century, and offshore wind energy is a renewable clean energy and becomes a new direction for relieving the situation of global energy tension. The cylindrical foundation is a novel ocean platform foundation form, is a circular plate foundation with a skirt board, and is gradually applied to offshore wind power foundation engineering due to the advantages of reducing engineering quantity, saving investment, shortening construction time, being reusable and the like.

The sinking process and the related theory of the steel thin-wall cylindrical foundation are basically mature, but the self structure cost is too high, and the large-scale popularization is not easy to carry out; the thick-wall cylindrical foundation made of reinforced concrete materials can effectively reduce the structural cost and improve the economic benefit of the cylindrical foundation, and is the main direction for developing the cylindrical foundation in the future.

The thick-wall cylindrical foundation is a novel foundation form, and has no precedent of successful settlement at home and abroad, and the difficulty is that the cylinder wall is thickened and the material is changed, so that the cylinder end resistance and the side wall friction resistance of the cylindrical foundation in the injection process are obviously increased. The traditional cylinder foundation generally adopts a negative pressure penetration sinking method, but the method is difficult to provide enough power to ensure that the cylinder foundation can be smoothly and safely penetrated to the designed depth when acting on a thick-wall cylinder foundation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a thick wall concrete shell type basis with spiral injection device, and the device is at a plurality of spiral auxiliary piles of shell type basic lateral wall implantation, through control helical blade at mud face internal rotation, produces decurrent injection force, and this injection force passes through flange and circular steel sheet and transmits to shell type basis to drive the downward injection of shell type basis, sink to preset position.

The utility model discloses a realize through following technical scheme:

a thick-wall concrete cylindrical foundation with a spiral penetration device comprises a cylindrical foundation and a plurality of spiral penetration devices arranged on a circular foundation;

a through prefabricated sleeve for inserting the spiral penetration device is arranged in the wall of the cylindrical foundation;

the spiral penetration device comprises a spiral pile upper structure, a spiral pile lower structure and a round steel plate; a circular steel plate is clamped between the upper structure of the spiral pile and the lower structure of the spiral pile through a flange structure, and the lower end of the lower structure of the spiral pile is provided with a spiral blade;

the spiral penetration device is inserted into each prefabricated sleeve of the cylindrical foundation, so that the circular steel plate covers the prefabricated sleeve (positioned on the upper surface of the cylindrical foundation), the diameter of the circular steel plate is larger than the inner diameter of the prefabricated sleeve, and the whole spiral penetration device can freely rotate in the prefabricated sleeve.

In the above technical solution, each of the prefabricated sleeves (spiral penetration means) is located on a circular side line concentric with the cylindrical foundation.

In the above technical solution, the number of the spiral penetration devices is greater than or equal to 2, and each spiral penetration device is centrosymmetric with the center of a circle of the cylindrical foundation.

In the technical scheme, the diameter of the spiral penetration device is smaller than that of the cylindrical foundation prefabricated sleeve, so that the friction resistance of the spiral penetration device during rotation is reduced, and the torque required to be applied in the installation process is reduced.

In the above technical scheme, the thick-wall concrete cylindrical foundation further comprises an external power mechanism for screwing the spiral penetration device into the soil body, and the external power mechanism applies torque force to the top end of the spiral penetration device

In the technical scheme, an external counterweight for generating sinking force is placed on the cylindrical foundation.

In the technical scheme, the cylindrical foundation is provided with a lifting ring for lifting.

A construction method of a thick-wall concrete cylindrical foundation with a spiral penetration device comprises the following steps:

step one, assembling the spiral penetration device and the cylindrical foundation on land: placing the lower structure of the spiral pile into a prefabricated sleeve of a cylindrical foundation, clamping a circular steel plate between the upper structure of the spiral pile and the lower structure of the spiral pile, and fixedly connecting the circular steel plate and the lower structure of the spiral pile through a flange; positioning a circular steel plate on the upper end surface of the prefabricated sleeve;

secondly, hoisting the cylindrical foundation and the spiral penetration device to a target placement water area, and enabling the spiral penetration device to partially penetrate below a mud surface under the action of self weight or an external counterweight;

and step three, under the driving of an external power device, each spiral pile rotates around the rotating shaft of the spiral pile, the spiral blades penetrating into the mud surface part generate downward penetrating force under the rotating action, and the cylindrical foundation penetrates to a preset depth under the combined action of the penetrating force and the self weight.

The utility model discloses an advantage and beneficial effect do:

the utility model discloses in a thick wall concrete section of thick bamboo type basis with spiral injection device, its main effect is that the rotation of spiral pile produces decurrent injection force, transmits to section of thick bamboo type basis body via relevant structure, sinks section of thick bamboo type basis to preset position.

Drawings

FIG. 1 is a top plan view of a thick-walled concrete cylindrical foundation with a screw penetration device;

FIG. 2 is a front view of a thick-walled concrete cylindrical foundation with a screw penetration device;

FIG. 3 is a cross-sectional view A-A' of FIG. 1;

FIG. 4 is a top view of a cartridge type foundation;

FIG. 5 is a front view of a screw pile superstructure;

FIG. 6 is a top view of a screw pile superstructure;

FIG. 7 is a front view of a screw pile substructure;

FIG. 8 is a top view of the screw pile substructure;

FIG. 9 is an elevation view of a flange configuration;

FIG. 10 is a top view of a flange configuration;

FIG. 11 is a top view of a circular steel plate;

FIG. 12 is a cross-sectional view B-B' of FIG. 7;

in the above figures: 1 is a cylindrical foundation; 1-1 is a cylindrical foundation body; 1-2 is a prefabricated sleeve; 2, the upper structure of the spiral pile; 2-1 is a spiral pile upper structure body; 2-2 is an upper flange; 3, a spiral pile lower structure; 3-1 is a lower structure body of the spiral pile; 3-2 is a lower flange; 3-3 is a helical blade; 4, a flange structure; 5 is a round steel plate; and 6, a bolt and nut structure.

For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.

Detailed Description

In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.

Example 1

A spiral penetration device for controlling the sinking of a cylindrical foundation comprises a cylindrical foundation 1, a spiral pile upper structure 2, a spiral pile lower structure 3 and an external power device, and is characterized in that a sleeve 1-2 is prefabricated in the side wall of a cylindrical foundation body 1-1; an upper flange 2-2 is welded at the lower edge of the upper structure body 2-1 of the spiral pile; the upper edge of the lower structure body 3-1 of the spiral pile is welded with a lower flange 3-2, and the lower part is welded with a spiral blade 3-3. The upper flange 2-2 and the lower flange 3-2 clamp the circular steel plate 5 at the middle position by utilizing a bolt and nut structure 6 to jointly form a pair of flange structures 4, and the spiral pile upper structure 2 and the spiral pile lower structure 3 are connected into a whole. The diameter of the flange structure 4 should be less than the diameter of the barrel-shaped foundation casing 1-2 to reduce the frictional resistance of the screw pile during rotation and reduce the torque required to be applied during installation, and the diameter of the circular steel plate 5 should be greater than the diameter of the circular foundation grouting casing 1-2 to transmit the penetration force generated by the screw pile to the barrel-shaped foundation 1. The penetration load generated by the helical blades 3-3 is transmitted to the cylindrical foundation 1 through the helical pile lower part structure body 3-1, the lower flange 3-2 and the round steel plate 5, so that the whole foundation can be penetrated to a preset position.

Example 2

When the device is assembled on land, a crane is used for erecting the lower part structure 3 of the screw pile, and other structures are used for restraining the lower part structure 3 of the screw pile to keep the lower part structure in an upright state; hoisting the cylindrical foundation 1 by using a crane, and enabling a grouting sleeve 1-2 on the cylindrical foundation 1 to penetrate through a lower part structure 3 of the spiral pile; and finally, hoisting the upper structure 2 of the spiral pile by using a crane, mutually matching an upper flange 2-2 structure of the lower edge of the upper structure 2 of the spiral pile, a lower flange 3-2 structure of the upper edge of the lower structure 3 of the spiral pile and a circular steel plate 5, and screwing bolts and nuts 6 at the flange 4 by using a manual method to rigidly combine the upper structure 2 of the spiral pile and the lower structure 3 of the spiral pile. After the onshore assembly is finished, the circular foundation 1 is lifted to a water area by a crane to drive the screw pile structure, so that the later floating transportation is facilitated.

Example 3

When the device is sunk, the whole structure is transported in a floating mode or hoisted to a preset place, the spiral pile part penetrates into the position below a mud surface under the action of dead weight or external balance weight, the spiral pile can rotate around a rotating shaft of the spiral pile under the driving of an external power device, a spiral blade 3-3 penetrating into the mud surface part can generate downward penetration force under the action of rotation, and the penetration force is transmitted to a cylindrical foundation 1 through a spiral pile lower part structure body 3-1, a flange 3-2 and a circular steel plate 5 in sequence to drive the cylindrical foundation 1 to be sunk to a preset depth; the inclination degree of the cylindrical foundation 1 can be controlled by changing the rotation speed of the spiral piles at different positions in the sinking process, and the bottom surface of the top cover of the cylindrical foundation 1 is ensured to be in complete contact with the bottom mud surface after the sinking is finished, so that the cylindrical foundation 1 can be ensured to have good bearing performance after the construction is finished. The number and the size of the spiral piles and the space and the size of the spiral blades 3-3 are designed according to the size of the cylindrical foundation 1 and the physical and mechanical properties of the soil body in a working area, namely the required maximum penetration force; however, the spiral auxiliary piles 2 should be uniformly distributed with the central axis of the cylindrical foundation body 1 as a symmetry center to ensure that differential settlement is not generated during the settling process of the cylindrical foundation body 1.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.

Claims

1. The utility model provides a thick wall concrete cylindrical foundation with spiral injection device which characterized in that: comprises a cylindrical foundation and a plurality of spiral penetration devices arranged on a circular foundation;

the spiral penetration device is inserted into each prefabricated sleeve of the cylindrical foundation, so that the circular steel plate covers the prefabricated sleeve, the diameter of the circular steel plate is larger than the inner diameter of the prefabricated sleeve, and the whole spiral penetration device can freely rotate in the prefabricated sleeve.

2. A thick-walled concrete cylindrical foundation with screw penetration device as claimed in claim 1, wherein: each prefabricated sleeve is positioned on a circular side line concentric with the cylindrical foundation.

3. A thick-walled concrete cylindrical foundation with screw penetration device as claimed in claim 1, wherein: the number of the spiral penetration devices is more than or equal to 2, and each spiral penetration device is centrosymmetric with the circle center of the cylindrical foundation.

4. A thick-walled concrete cylindrical foundation with screw penetration device as claimed in claim 1, wherein: the diameter of the spiral penetration device is smaller than that of the barrel-type foundation prefabricated sleeve, so that the friction resistance of the spiral penetration device during rotation is reduced, and the torque required to be applied in the installation process is reduced.

5. A thick-walled concrete cylindrical foundation with screw penetration device as claimed in claim 1, wherein: the thick-wall concrete cylindrical foundation further comprises an external power mechanism for screwing the spiral penetration device into the soil body, and the external power mechanism applies torsion on the top end of the spiral penetration device.

6. A thick-walled concrete cylindrical foundation with screw penetration device as claimed in claim 1, wherein: and an external counterweight for generating sinking force is arranged on the cylindrical foundation.

7. A thick-walled concrete cylindrical foundation with screw penetration device as claimed in claim 1, wherein: and a lifting ring for lifting is arranged on the cylindrical foundation.