CN112195958B - Soil-blockage-preventing hole-blocking and reverse-grouting-preventing cabin-dividing suction bucket foundation - Google Patents
Soil-blockage-preventing hole-blocking and reverse-grouting-preventing cabin-dividing suction bucket foundation Download PDFInfo
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- CN112195958B CN112195958B CN202010644777.7A CN202010644777A CN112195958B CN 112195958 B CN112195958 B CN 112195958B CN 202010644777 A CN202010644777 A CN 202010644777A CN 112195958 B CN112195958 B CN 112195958B
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- bucket
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
Abstract
The invention discloses a subdivision suction bucket foundation for preventing soil from blocking holes and performing reverse grouting, which comprises a suction bucket and pumping installation equipment, wherein the suction bucket comprises a suction bucket top plate, an outer bucket wall, an inner bucket wall and a subdivision ribbed plate which are fixedly connected, and the inner bucket wall and the subdivision ribbed plate divide the suction bucket into an inner subdivision and a plurality of outer subdivisions respectively; still include soil stopper baffle, soil stopper detection device, limbers and geotechnological filter screen: the filter screen is arranged in the foundation, so that the hole blocking phenomenon possibly occurring in the injection process is prevented; inside sets up soil stopper baffle and detection device, can the in-bucket soil stopper of real-time supervision highly whether exceed the restriction, when the high whole soil stopper that reaches baffle department of soil stopper, constructor can stop further suction injection according to monitoring data, then carries out reverse slip casting and fills the space. The slurry injected into the bucket can ensure that the top cover of the suction bucket is in complete contact with the soil body, so that the installation quality of the suction bucket is improved, and the bearing capacity of the suction bucket and the safety of the bucket top plate structure are further ensured.
Description
Technical Field
The invention belongs to the technical field of offshore wind power engineering, and particularly relates to a subdivision suction bucket foundation capable of preventing soil from blocking holes and performing reverse grouting.
Background
In recent years, renewable clean energy is vigorously developed in China, and offshore wind energy resources are always the focus of much attention. The offshore wind power generation technology is the most important way for offshore wind energy resource development at present, and the offshore wind power base accounts for more than 30% of the total investment of offshore wind power. The offshore wind turbine foundation that present conventionality adopted is single pile foundation and jacket basis, but along with the extension of marine wind power development scope and the complication of environmental condition, neotype suction bucket shape basis uses widely gradually. The suction bucket foundation uses negative pressure penetration, water pressure difference is formed on the inner surface and the outer surface of the bucket body by extracting water in the bucket, and the bucket body is gradually pressed into a soil layer under the action of the water pressure difference to finish installation. After the installation, the passive negative pressure in the barrel body can be effectively ensured to still exert through sealing the water pumping port during service. Therefore, the construction of the suction bucket foundation has the advantages of no need of heavy piling equipment, quick installation, no influence of water depth and the like, and is gradually favored by the offshore wind power industry.
A bucket foundation of suction for offshore wind power generally is a broad shallow formula basis, and for the convenience of installation and leveling, also generally will carry out the subdivision to it, can in time rectify a deviation in the installation through the pressure of controlling different cabins, guarantees the requirement of installation gradient.
In the process of negative pressure penetration of the suction barrel, soil at the bottom of the barrel is poured into the barrel, the height of the soil plug is continuously increased, however, due to the influence of barrel wall friction, the height development of the soil plug is not uniform, partial soil plug is likely to block a water drainage port under the action of suction force, and further the barrel body is influenced to continue penetration. The result may also cause erroneous judgment by the engineer, considering that the bucket body has been installed in place and stopping subsequent corrective measures. However, due to the uneven development of the soil plug, a plurality of cavities are formed in the bucket, and the soil body in the cavities is not in contact with the top plate of the suction bucket. Under the condition, on one hand, the whole bearing capacity of the barrel body can be obviously reduced, and on the other hand, the top plate of the barrel is locally stressed under the action of external load to cause obvious stress concentration, so that the safety of the foundation structure is directly harmed.
Based on the situation, the invention provides the subdivision suction bucket foundation capable of preventing the soil from blocking the hole and performing reverse grouting, and the problems can be effectively solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a subdivision suction bucket foundation capable of preventing soil from blocking holes and performing reverse grouting. The filter screen is arranged in the foundation, so that the hole blocking phenomenon possibly occurring in the injection process is prevented; inside sets up native stopper baffle and detection device, can the real-time supervision bucket in the native stopper highly whether exceed the restriction, when the high whole of native stopper reaches native stopper baffle department, constructor can stop further suction and inject according to monitoring data, then carries out reverse slip casting and fills the space. The slurry injected into the bucket can ensure that the top cover of the suction bucket is in complete contact with the soil body, so that the installation quality of the suction bucket is improved, and the bearing capacity of the suction bucket and the safety of the bucket top plate structure are further ensured.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a subdivision suction bucket foundation for preventing soil blockage and reverse grouting comprises a suction bucket and a water pumping installation device, wherein the suction bucket comprises a suction bucket top plate, an outer bucket wall, an inner bucket wall and a subdivision ribbed plate which are fixedly connected, and the inner bucket wall and the subdivision ribbed plate divide the suction bucket into an inner subdivision and a plurality of outer subdivisions respectively; further comprising:
the soil plug baffle comprises an inner side baffle arranged corresponding to the inner side subdivision and an outer side baffle arranged corresponding to the outer side subdivision, the inner side baffle and the outer side baffle are arranged on the lower surface of the suction barrel top plate, and gaps are reserved between the inner side baffle and the suction barrel top plate;
the soil plug detection device comprises a strain gauge and a film soil pressure meter which are arranged on the lower surface of the soil plug baffle plate and are respectively used for detecting the structural deformation and the surface soil pressure of the soil plug baffle plate;
the limber hole is formed in the soil plug baffle and serves as a water flow channel; the limbers are covered with geotechnical filter screens for preventing the particles from being taken away to cause blockage.
In the structure, the soil plug detection device mainly comprises a sensor arranged on the lower side of the soil plug baffle plate, and the sensor comprises a strain gauge and a film soil pressure meter. The strain gauge has the effects that when the soil plug baffle is contacted with the soil body, the baffle can be deformed due to contact stress, and whether the baffle is contacted with the soil plug can be judged through structural deformation; the effect of film soil pressure gauge is for perception and the structural soil pressure who receives of measurement baffle, and then judges the integrality of soil stopper and baffle contact.
As a preferable technical solution of the present invention, the bulkhead ribs are circumferentially and uniformly distributed inside the outer sub-bay, and an inward extending surface of the bulkhead ribs is parallel to and intersects with a central axis of the suction bucket; the outer barrel wall and the inner barrel wall are both cylindrical, and correspondingly, the inner side baffle plate and the outer side baffle plate are respectively in a disc shape and a fan shape.
As a preferable technical scheme of the invention, the strain gauge and the film soil pressure gauge are both annularly arranged on the disc-shaped inner side baffle plate and are both arranged on the fan-shaped outer side baffle plate along the arc direction.
As a preferable technical scheme of the invention, water pumping holes are formed in the middle positions of the inner subdivision and the outer subdivision and are used for negative pressure installation.
As a preferred technical scheme of the invention, the water pumping installation equipment comprises a water pumping pump and a water pumping pipeline; one end of the water pumping pipeline is connected with the water pump, and the other end of the water pumping pipeline is connected with the water pumping hole.
As a preferred technical scheme of the invention, a first grouting hole and a first grout returning hole are respectively formed on the top surface of the inner side subdivision, which is close to the outer edge; and a second grouting hole is formed in the top surface of each outer side subdivision, close to the outer edge, and a second grout returning hole is formed in the top surface of each outer side subdivision, close to the inner edge.
In the structure, the first grouting hole and the second grouting hole are used for subsequent grouting, and the first grout returning hole and the second grout returning hole are used for returning grout, so that the grout is ensured to flow in the barrel to form complete grout.
As a preferred technical scheme of the invention, the pore diameter of the geotechnical filter screen is 0.075 mm.
In the structure, lay the limbers on the soil stopper baffle, can regard as the passageway of rivers, lay geotechnological filter screen on the limbers, the aperture of filter screen is 0.075 millimeters, can prevent that the granule from being taken away and arouse the jam.
As a preferred technical scheme of the invention, all the soil plug baffle plates are fixedly connected with the top plate of the suction bucket through the baffle plate support.
As a preferable technical scheme of the invention, the gap between the soil plug baffle plate and the top plate of the suction bucket is set to be 20-30 cm.
As a preferable technical scheme of the invention, the size of the soil plug baffle plate is slightly smaller than the section outline of the corresponding sub-compartment.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the geotechnical filter screen is arranged in the barrel-shaped foundation, so that the hole blocking phenomenon possibly occurring in the injection process is prevented; inside soil stopper baffle and the soil stopper detection device of setting up can remind in real time when the contact of soil stopper, and constructor can stop further suction and penetrate according to this warning, then carries out reverse slip casting and fills the space, can guarantee the top cap and the soil body of suction bucket to contact completely through the slip casting body, improves the installation quality of suction bucket, and then guarantees the bearing capacity of suction bucket and the security of bucket roof structure.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic longitudinal sectional view of the present invention;
FIG. 3 is a bottom view of the inner baffle of the present invention;
FIG. 4 is a bottom view of the outboard fender of the present invention;
FIG. 5 is a schematic view of the grouted structure of the present invention.
Reference numerals are as follows: 1. the soil plug device comprises a suction barrel, 2, a soil plug baffle, 3, a soil plug detection device, 4, water pumping installation equipment, 5, a suction barrel top plate, 6, an outer barrel wall, 7, an inner barrel wall, 8, a bulkhead rib plate, 9, an inner compartment, 10, an outer compartment, 11, an inner baffle, 12, an outer baffle, 13, a baffle support, 14, a water through hole, 15, a geotechnical filter screen, 16, a strain gauge, 17, a membrane soil pressure gauge, 18, a water pumping hole, 19, a water pumping pump, 20, a water pumping pipeline, 21, a first grouting hole, 22, a first grouting hole, 23, a second grouting hole, 24 and a second grouting hole.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The technical features (the components/elements of the invention) of the strain gauge, the membrane pressure gauge, the computer program, etc. described in the present invention are all obtained from conventional commercial sources or prepared by conventional methods, and the specific structure, the operation principle, and the control mode and the spatial arrangement mode that may be involved are all the conventional choices in the field, which should not be regarded as the innovation point of the present invention, and it is understood by those skilled in the art that the present invention is not further specifically described in detail.
As shown in fig. 1-5, the invention provides a subdivision suction bucket foundation for preventing soil from blocking holes and performing reverse grouting, which mainly comprises a suction bucket 1, a soil plug baffle 2, a soil plug detection device 3 and a water pumping installation device 4.
The suction bucket 1 is cylindrical and comprises a suction bucket top plate 5, an outer bucket wall 6, an inner bucket wall 7 and bulkhead ribbed plates 8, the number of the bulkhead ribbed plates 8 is 6, the bulkhead ribbed plates 8 are arranged at 60 degrees, seven cabins are formed by the bulkhead ribbed plates 8, and each cabin comprises an inner side cabin 9 and six outer side cabins 10. A water pumping hole 18 is formed in the middle of the top surface of each barrel and used for negative pressure installation; a first grouting hole 21 and a first grout returning hole 22 are respectively formed on the top surface of the inner subdivision 9 close to the outer edge; the top surface of each outer compartment 10 is provided with a second grouting hole 23 near the outer edge and a second grouting hole 24 near the inner edge. The first grouting hole 21 and the second grouting hole 23 are used for subsequent grouting, and the first grout returning hole 22 and the second grout returning hole 24 are used for grout returning, so that the grout can flow in the barrel to form complete grouting.
The soil plug baffle plate 2 has two configurations, one is a round inner side baffle plate 11 which is fixed in the inner side sub-chamber 9; the second is fan-shaped outside baffle 12, and it is fixed in six outside subdivision 10 respectively, and all baffles support 13 through four baffles and fix on suction bucket roof 5 inboard, and the distance roof sets up to 20~30cm, and the size of all baffles slightly is less than the section profile of corresponding subdivision. The baffle supports 13 are respectively arranged at four corners of the fan-shaped outer baffle 12 at four positions on the outer side of the circular inner baffle 11 in the circumferential direction. The limbers 14 are arranged on the baffle and can be used as a channel of water flow, the geotechnical filter screen 15 is arranged on the limbers 14, the aperture of the filter screen is 0.075mm, and particles can be prevented from being taken away to cause blockage.
The soil plug detection device 3 mainly comprises a sensor arranged on the lower side of the soil plug baffle plate 2, and comprises a strain gauge 16 and a film soil pressure meter 17. The strain gauge 16 is used for judging whether the soil plug baffle is contacted or not through structural deformation, wherein the baffle is likely to deform due to contact stress when the soil plug baffle is contacted with soil; the diaphragm soil pressure gauge 17 functions to sense and measure the soil pressure generated by the structure when the soil directly contacts the fender. The strain gauge 16 and the film soil pressure gauge 17 are arranged on the disc-shaped inner baffle plate 11 in an annular direction and are arranged on the fan-shaped outer baffle plate 12 in an arc direction. The strain gauge 16 and the film soil pressure gauge 17 are arranged alternately along the radial direction of the soil plug baffle.
The water pumping installation device 4 comprises a water pumping pump 19 and a water pumping pipeline 20; one end of the water pumping pipeline 20 is connected with a water pumping pump 19, and the other end of the water pumping pipeline is connected with a water pumping hole 18.
The whole installation process of the suction bucket foundation is as follows: in the negative pressure installation process, a computer program is used for controlling the water suction pump 19 to pump water, the inclination of the barrel body is monitored in real time, and the external suction force on each cabin is adjusted by controlling the switches of different water suction pipelines 20 in the water suction pump 19, so that the barrel body is leveled; after the soil plug is penetrated to a certain depth, the inner soil plug touches the soil plug baffle 2, the strain gauge 16 and the soil pressure gauge 17 can detect the structural deformation and the surface soil pressure, and when the structural deformation and the surface soil pressure reach a threshold value, further suction penetration is stopped; and closing the water pumping hole 18, reversely irrigating the cement mortar through the first grouting hole 21 and the second grouting hole 23, and grouting back through the first grout returning hole 22 and the second grout returning hole 24 to fill the gap between the bucket and the soil body with the cement mortar slurry to finish construction.
According to the description and the drawings of the invention, the person skilled in the art can easily manufacture or use the hole blockage preventing and reverse grouting subdivision suction bucket foundation of the invention and can produce the positive effects recorded by the invention.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art by referring to the drawings as appropriate.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. A subdivision suction bucket foundation capable of preventing soil blockage and reverse grouting comprises a suction bucket (1) and a water pumping installation device (4), wherein the suction bucket (1) comprises a suction bucket top plate (5), an outer bucket wall (6), an inner bucket wall (7) and a bulkhead ribbed plate (8) which are fixedly connected, the suction bucket (1) is divided into an inner subdivision (9) and a plurality of outer subdivisions (10) by the inner bucket wall (7) and the bulkhead ribbed plate (8), and water pumping holes are formed in the tops of the outer subdivisions (10) and the inner subdivision; it is characterized by also comprising:
the soil plug baffle (2) comprises an inner side baffle (11) arranged corresponding to the inner side subdivision (9) and an outer side baffle (12) arranged corresponding to the outer side subdivision (10), the inner side baffle (11) and the outer side baffle (12) are both arranged on the lower surface of the suction barrel top plate (5), gaps are reserved between the outer side baffle and the suction barrel top plate (5), and the size of the soil plug baffle (2) is slightly smaller than the section outline of the corresponding subdivision;
the soil plug detection device (3) comprises a strain gauge (16) and a film soil pressure gauge (17) which are arranged on the lower surface of the soil plug baffle plate (2), the strain gauge has the function that when the soil plug baffle plate contacts with a soil body, the baffle plate can deform due to contact stress, and whether the baffle plate contacts with the soil plug can be judged through structural deformation; the film soil pressure gauge is used for sensing and measuring the soil pressure borne by the baffle structure so as to judge the contact integrity of the soil plug and the baffle;
the limber hole (14) is arranged on the soil plug baffle plate (2) and is used as a water flow channel; the water through holes (14) are covered with a geotechnical filter screen (15) for preventing particles from being taken away to cause blockage;
a first grouting hole (21) and a first grout returning hole (22) are respectively formed in the top surface of the inner side subdivision (9) close to the outer edge; and a second grouting hole (23) is formed in the top surface of each outer side subdivision (10) close to the outer edge, and a second grout returning hole (24) is formed in the top surface of each outer side subdivision close to the inner edge.
2. The bucket foundation of claim 1, which is characterized in that: the compartment rib plates (8) are circumferentially and uniformly distributed in the outer sub-compartment (10), and the inward extending surfaces of the compartment rib plates are parallel to and intersected with the central axis of the suction bucket (1); the outer barrel wall (6) and the inner barrel wall (7) are both cylindrical, and correspondingly, the inner side baffle plate (11) and the outer side baffle plate (12) are respectively disc-shaped and fan-shaped.
3. The bucket foundation of claim 2, which is characterized in that: the strain gauge (16) and the film soil pressure meter (17) are arranged on the disc-shaped inner side baffle plate (11) in an annular direction and are arranged on the fan-shaped outer side baffle plate (12) along an arc direction.
4. The soil blockage prevention hole-reverse grouting subdivision suction bucket foundation of claim 1, which is characterized in that: and water pumping holes (18) are formed in the middle positions of the inner subdivision (9) and the outer subdivision (10) and used for negative pressure installation.
5. The bucket foundation of claim 4, which is characterized in that: the water pumping installation equipment (4) comprises a water pumping pump (19) and a water pumping pipeline (20); one end of the water pumping pipeline (20) is connected with a water pump (19), and the other end of the water pumping pipeline is connected with a water pumping hole (18).
6. The bucket foundation of claim 1, which is characterized in that: the pore diameter of the geotechnical filter screen (15) is 0.075 mm.
7. The bucket foundation of claim 1, which is characterized in that: all the soil plug baffle plates (2) are fixedly connected with the suction bucket top plate (5) through baffle plate supports (13).
8. The bucket foundation of claim 1, which is characterized in that: the gap between the soil plug baffle plate (2) and the suction barrel top plate (5) is set to be 20-30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010644777.7A CN112195958B (en) | 2020-07-07 | 2020-07-07 | Soil-blockage-preventing hole-blocking and reverse-grouting-preventing cabin-dividing suction bucket foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010644777.7A CN112195958B (en) | 2020-07-07 | 2020-07-07 | Soil-blockage-preventing hole-blocking and reverse-grouting-preventing cabin-dividing suction bucket foundation |
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| CN112195958A CN112195958A (en) | 2021-01-08 |
| CN112195958B true CN112195958B (en) | 2022-06-14 |
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| CN202010644777.7A Active CN112195958B (en) | 2020-07-07 | 2020-07-07 | Soil-blockage-preventing hole-blocking and reverse-grouting-preventing cabin-dividing suction bucket foundation |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878353B (en) * | 2021-01-15 | 2022-09-13 | 浙江工业大学 | Reverse filtering device applied to offshore wind turbine pile-bucket composite foundation and construction method |
| CN112942404B (en) * | 2021-02-03 | 2022-07-15 | 青岛理工大学 | Suction bucket for offshore wind turbine and construction method |
| CN113404078B (en) * | 2021-05-18 | 2022-07-15 | 中交第三航务工程局有限公司 | Method for blocking seepage channel of negative pressure barrel foundation |
| CN114809063A (en) * | 2022-02-28 | 2022-07-29 | 上海勘测设计研究院有限公司 | Multi-compartment composite cylindrical foundation and construction method thereof |
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