CN114718107B - Ocean suction type foundation capable of carrying out systematic negative pressure monitoring and using method thereof - Google Patents
Ocean suction type foundation capable of carrying out systematic negative pressure monitoring and using method thereof Download PDFInfo
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- CN114718107B CN114718107B CN202210649537.5A CN202210649537A CN114718107B CN 114718107 B CN114718107 B CN 114718107B CN 202210649537 A CN202210649537 A CN 202210649537A CN 114718107 B CN114718107 B CN 114718107B
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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
- E02D27/24—Foundations constructed by making use of diving-bells
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
The application relates to the technical field of ocean engineering foundation structures, and discloses an ocean suction type foundation capable of carrying out systematic negative pressure monitoring and a using method thereof, wherein the ocean suction type foundation comprises a suction bucket body and a negative pressure monitoring device, the suction bucket body comprises a top cover and a side wall, and the top cover is provided with a wire outlet hole; the negative pressure monitoring devices are respectively arranged on the inner surfaces of the top cover and the side wall, each negative pressure monitoring device comprises a pressure sensor and a protection device arranged outside the pressure sensor, each protection device can wrap and limit the pressure sensor, each protection device is provided with a hollowed-out area, each hollowed-out area is exposed in a soil body inside the suction bucket foundation, and the sensing end of each pressure sensor at least extends into the hollowed-out area; the suction bucket body still is equipped with the pipeline passageway, and the outlet opening communicates the pipeline passageway. The negative pressure monitoring device in the suction foundation can simultaneously detect the pore water pressure below the top cover and in the side wall so as to monitor the negative pressure change in the foundation in real time.
Description
Technical Field
The invention belongs to the field of ocean engineering foundation structures, and particularly relates to an ocean suction type foundation capable of carrying out systematic negative pressure monitoring and a using method thereof.
Background
The suction type foundation is an important foundation form of an offshore oil and gas platform and an offshore wind power structure, and is mostly an inverted-buckle large-diameter cylindrical structure with an opening at the bottom end and a closed top end in appearance. When the barrel is installed, firstly, the barrel body is partially inserted into the soil by means of the dead weight of the barrel body to form a closed space, then the air in the barrel is pumped out, and the barrel base is gradually pressed into the seabed to a preset depth by means of the pressure difference between the inside and the outside to complete the installation.
The soil body in the suction type foundation is a main area influenced by negative pressure, and negative pressure monitoring in the foundation has great significance for evaluating the characteristics of foundation penetration, bearing and recovery. The existing negative pressure monitoring of the marine foundation is mostly limited to the negative pressure in the foundation below a suction type foundation top cover and cannot be monitored after grouting is carried out on the upper portion of the foundation, and the installation method of the negative pressure monitoring device on the inner side wall of the foundation is not clear.
The application number is 201810008033.9, and the subject name is 'an automatic liquefaction prevention double-wall suction barrel foundation', and the invention discloses a scheme that a pore water pressure sensor is arranged on the barrel wall of the suction barrel foundation to collect the hyperstatic pore water pressure in the seabed around the suction barrel foundation, and the scheme can only detect the pore water pressure of the soil body around the suction barrel and is not beneficial to evaluating the negative pressure change condition in the suction barrel foundation.
The Chinese invention patent application with the application number of 202111408315.6 and the subject name of 'intelligent monitoring device for suction tube' discloses a differential pressure monitoring device for detecting the differential pressure inside and outside the suction tube, wherein the differential pressure inside and outside detecting device comprises a pressure sensor, the specific installation structure and installation position of the pressure sensor are not described, and how to avoid the situation that the current negative pressure monitoring device is easy to damage is not known.
Disclosure of Invention
The invention provides a marine suction foundation to solve at least one of the above technical problems.
The technical scheme adopted by the invention is as follows:
the invention provides an ocean suction type foundation capable of carrying out systematic negative pressure monitoring, which comprises a suction barrel body and a negative pressure monitoring device, wherein the suction barrel body is provided with a suction inlet and a suction outlet; the suction bucket body comprises a top cover and a side wall, the top cover and the side wall surround to form a bucket body structure with a downward opening, and the top cover is provided with a wire outlet hole; the suction bucket foundation comprises a suction bucket foundation, a plurality of negative pressure monitoring devices, a plurality of suction bucket foundations and a plurality of suction bucket foundations, wherein the suction bucket foundation is arranged on the suction bucket foundation, the suction bucket foundations are arranged on the suction bucket foundation, and the suction bucket foundations are arranged on the inner surfaces of the top cover and the side walls of the suction bucket foundation; the suction bucket body still is equipped with the pipeline passageway, the wire hole intercommunication pipeline passageway, negative pressure monitoring devices's pipeline can connect in external controller through pipeline passageway.
As a preferable embodiment of the present invention, the negative pressure monitoring device further includes a suction device disposed inside the protection device, the suction device is disposed beside the pressure sensor, and a suction end of the suction device is located below the pressure sensor in the longitudinal direction.
As a preferred embodiment of the present invention, the negative pressure monitoring devices include two first negative pressure monitoring devices disposed on the top cover and two second negative pressure monitoring devices disposed on the inner surface of the side wall, the two first negative pressure monitoring devices are disposed symmetrically along the center of the top cover, the multiple sets of second negative pressure monitoring devices are disposed longitudinally along the side wall, and each set of the two second negative pressure monitoring devices is disposed symmetrically with respect to the center line of the side wall.
As a preferred embodiment of the present invention, a plurality of sets of first reinforcing ribs are provided at intervals in the circumferential direction of the side wall, two first reinforcing ribs are provided in each set, an installation gap is formed between the two first reinforcing ribs, the second negative pressure monitoring device is provided in the installation gap, and a plurality of negative pressure monitoring devices are also provided at even intervals in the longitudinal direction of each set of the first reinforcing ribs.
As a preferred embodiment of the present invention, the protection device includes an upper member and a lower member, the upper member includes a first connecting section and a second connecting section, the second connecting section and the lower member are both provided with the hollow-out area, the first connecting section is connected to the top cover, the second connecting section is connected to the lower member, and the hollow-out area protrudes below the top cover; or the first connecting section is connected with the first reinforcing rib, the second connecting section is connected with the lower component, and the hollow area is exposed out of the first reinforcing rib;
the protection device further comprises a filter screen, and the filter screen is fixed between the second connecting section and the lower component.
As a preferred embodiment of the present invention, the second negative pressure monitoring device further includes a limiting member, the limiting member includes a circumferential limiting member and an axial limiting member, the circumferential limiting member is in clamping contact with the side wall of the protection device, the axial limiting member includes an upper limiting member disposed at the upper end of the protection device and a lower limiting member disposed at the lower end of the protection device, and the upper limiting member and the lower limiting member are respectively fixed to the inner surface of the side wall.
As a preferred embodiment of the present invention, the axial limiting part is a U-shaped member, two wings of the U-shaped member are fixedly connected to the inner surface of the side wall through fasteners, the circumferential limiting part is an elastic expansion part, one end of the circumferential limiting part is in clamping fit with the first reinforcing rib, and the other end of the circumferential limiting part is in clamping fit with the second protection device.
As a preferred embodiment of the present invention, a connecting member is disposed above the top cover, a second reinforcing rib is disposed below the top cover, the connecting member has a first pipeline channel and a communication hole communicating with the outside, the communication hole can also communicate the first pipeline channel with the outlet hole, the connecting member has a mounting groove communicating with the first pipeline channel, the first negative pressure monitoring device passes through the top cover and extends into the mounting groove, the first reinforcing rib, the axial limiting member and the side wall surround to form a second pipeline channel, the second reinforcing rib has a third pipeline channel communicating with the second pipeline channel, and the third pipeline channel communicates with the outlet hole.
The invention also provides a using method of the marine suction foundation, which comprises the following steps:
(1) assembling the marine suction foundation, respectively modularly assembling the negative pressure monitoring devices on the top cover and the side wall of the suction barrel body, and connecting the negative pressure monitoring devices to the external controller through pipelines;
(2) sinking and penetrating the marine suction type foundation, sinking and penetrating the marine suction type foundation to the seabed, and detecting the negative pressure below the top cover and inside the side wall of the suction barrel body in the sinking and penetrating installation stage by the negative pressure monitoring device;
(3) the ocean suction type foundation enters a service bearing stage, and the negative pressure monitoring device detects negative pressures below a top cover and inside a side wall of the suction barrel body in the service stage;
(4) the ocean suction type foundation is recovered, and the negative pressure monitoring device detects negative pressure below the top cover and inside the side wall of the suction barrel body in the recovery process;
(5) modularizing the negative pressure monitoring device from the suction bucket body;
acquiring a water pressure preset value at any stage in the steps (2) - (4), acquiring and analyzing real-time negative pressure monitoring values below the base top cover of the suction bucket and inside the side wall through an external controller, and judging that the pressure sensor is damaged when the real-time negative pressure monitoring values are smaller than the water pressure preset value; and when the real-time negative pressure monitoring value is larger than the water pressure preset value, judging that soil particles enter the negative pressure monitoring device, and controlling the suction device to perform suction operation.
As a preferred embodiment of the present invention, the suction device includes a first suction member and a second suction member provided at both sides of the pressure sensor, and the first suction member and the second suction member alternately perform a water pumping and a water absorbing operation.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention provides a marine suction foundation capable of carrying out systematic negative pressure monitoring.A negative pressure monitoring device is arranged on a suction barrel body so as to monitor the negative pressure change in the barrel body in real time in the installation, service and recovery processes of the suction foundation, so that the processes of penetration installation, service bearing and smooth recovery can be smoothly finished. Because the negative pressure monitoring devices can be arranged on the top cover and the side wall of the suction type body, the pore water pressure below the top cover and in the side wall can be detected simultaneously. The protection device is arranged outside the pressure sensor to avoid the situation that the pressure sensor is in quick contact with soil and boulder to cause damage due to extrusion or collision and the like with the soil and boulder in the process of penetration of the suction barrel main body. When carrying out the protection, through set up the fretwork district on protection device, water can get into in the negative pressure monitoring devices to pressure sensor can sense water pressure.
2. The ocean suction type foundation provided by the invention is also provided with the suction device, so that the problem of how to remove sand if the sand feeding problem occurs in the using process of the negative pressure monitoring device is solved, when a large amount of sand is fed into the negative pressure monitoring device, the water pressure and the soil pressure are monitored by the pressure sensor, and at the moment, the entering soil body can be dispersed, sucked and discharged through the suction device, so that the water pressure is only monitored by the pressure sensor. Furthermore, the first suction piece and the second suction piece are arranged on the two sides of the pressure sensor respectively, so that the water pumping operation and the water suction effect are performed alternately, and the negative pressure monitoring device is favorable for quickly and completely removing soil particles in the negative pressure monitoring device. In order to avoid soil block particles to enter the negative pressure monitoring device, further, the negative pressure monitoring device of the application is further provided with a filter screen, the soil particles possibly entering the inside of the protection device are separated by the filter screen, the accuracy of the water pressure sensed by the pressure sensor is ensured, and the water pressure error sensed by the sensor is ensured to be within 5% of the true value.
3. The invention provides a negative pressure monitoring device of an ocean suction type foundation, which comprises a first negative pressure monitoring device arranged on a top cover and a second negative pressure monitoring device arranged on the inner surface of a side wall, wherein at least two first negative pressure monitoring devices are symmetrically arranged along the center of the top cover, a plurality of groups of second negative pressure monitoring devices are arranged in the longitudinal direction of the side wall, each group at least comprises two second negative pressure monitoring devices symmetrically arranged relative to the center line of the side wall, and the negative pressure monitoring data at the same level can be compared, and a plurality of negative pressure monitoring data at different levels at the same side can be compared to judge whether the negative pressure in a barrel accords with a negative pressure change rule or not, and cause analysis is carried out.
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 not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an ocean suction foundation according to an embodiment of the present invention;
FIG. 2 is a top view of a marine suction foundation according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a marine suction foundation cap according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first negative pressure monitoring device according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a joint between an upper member and a lower member of a protective device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second negative pressure monitoring device according to an embodiment of the present invention;
fig. 7 is a first schematic view illustrating an installation of a second negative pressure monitoring device according to an embodiment of the present invention;
fig. 8 is a second schematic view illustrating an installation of a second negative pressure monitoring device according to an embodiment of the present invention;
fig. 9 is a third schematic view illustrating an installation of a second negative pressure monitoring device according to an embodiment of the present invention.
Wherein the content of the first and second substances,
1-a suction bucket body; 11-a top cover; 111-outlet holes; 112-deadweight pneumatic valve; 113-vacuum pneumatic valves; 12-a side wall; 13-a pipeline channel; 131-a first line channel; 132-a second line channel; 133-a third line channel; 14-a first reinforcing rib; 15-a connector; 151-communicating holes; 152-a mounting groove; 16-a second reinforcing rib; 17-a sealing block;
2-a negative pressure monitoring device; 21-a first negative pressure monitoring device; 22-a second negative pressure monitoring device; 23-a pressure sensor; 231-sensor upper module; 232-a sensor processing module; 233-sensor sensing module; 24-a protective device; 241-an upper member; 2411-a first connecting segment; 2412-a second connection segment; 242-a lower member; 243-a filter screen; 25-a suction device; 251-a first suction piece; 252-a second suction piece; 26-a stop; 261-a circumferential limit; 262-an axial stop; 2621-an upper stop; 2622-a lower stop; 2623-fasteners.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those illustrated in the drawings, and are used merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The invention provides a marine suction foundation capable of carrying out systematic negative pressure monitoring, and as shown in figures 1-5, the marine suction foundation comprises a suction bucket body 1 and a negative pressure monitoring device 2. The suction bucket body 1 comprises a top cover 11 and a side wall 12, the top cover 11 and the side wall 12 surround to form a bucket body structure with a downward opening, the top cover 11 is provided with a wire outlet hole 111, and the top cover 11 is further provided with a self-weight pneumatic valve 112 and a vacuum pneumatic valve 113 so as to adjust negative pressure in the bucket. Negative pressure monitoring devices 2 are equipped with a plurality ofly, install respectively in top cap 11 and lateral wall 12 internal surface, and negative pressure monitoring devices 2 includes pressure sensor 23 and locates the outside protection device 24 of pressure sensor 23, and protection device 24 can wrap up and spacing pressure sensor 23. The guard 24 is typically a metal member that is steel, stainless steel, or the like. The pressure sensor 23 includes a sensor upper module 231, a sensor processing module 232, and a sensor sensing module 233. The sensor upper module 231 is mainly used for fixing the sensor, the outer side of the sensor is provided with threads, the sensor is in threaded sealing connection with the external protection device 24, and the sensor can be replaced in time if damaged. The sensor upper module 231 is provided with a through hole in the middle thereof through which a data line of the sensor passes. The sensor processing module 232 is used for processing the data signal generated by the sensor sensing module 233 due to the surface pressure change. The pressure sensor 23 is a flat membrane type sensor, which is different from the microporous type of the conventional pore water pressure sensor, and thus can ensure that the sensor is not damaged by the entry of soil particles. And the flat-die water pressure sensor is adopted to replace the existing vibrating wire pressure sensor, so that the sensor is cheap and durable, and the matched acquisition instrument is small in volume and low in price
The protection device 24 is provided with a hollow-out area exposed in the soil body inside the suction bucket foundation, and the sensing end of the pressure sensor 23 at least extends into the hollow-out area. The suction bucket body 1 is further provided with a pipeline channel 13, the outlet hole 111 is communicated with the pipeline channel 13, and a pipeline of the negative pressure monitoring device 2 can be connected to an external controller through the pipeline channel 13.
According to the marine suction foundation provided by the invention, the negative pressure monitoring device 2 is arranged on the suction barrel body 1 so as to detect the negative pressure change in the barrel body in real time in the installation, service and recovery processes of the suction foundation, so that the processes of penetration installation, service bearing and smooth recovery can be smoothly completed. Because the negative pressure monitoring device 2 can be installed on the top cover 11 and the side wall 12 of the suction type body, the pore water pressure below the top cover 11 and in the side wall 12 can be detected simultaneously. The protection device 24 is arranged outside the pressure sensor 23 to avoid the situation that the pressure sensor 23 is in quick contact with the soil body and is damaged due to extrusion or collision and the like between the pressure sensor 23 and the soil body in the process that the suction bucket body sinks through. When the protection is performed, water can enter the negative pressure monitoring device 2 by arranging the hollow-out area on the protection device 24, so that the pressure sensor 23 can sense the water pressure.
As shown in fig. 1 to 6, in one embodiment, the negative pressure monitoring device 2 further includes a suction device 25 disposed inside the protection device 24, the suction device 25 is disposed beside the pressure sensor 23, and a suction end of the suction device 25 is located below the pressure sensor 23 in the longitudinal direction. The suction device 25 can disperse and suck soil particles entering the interior of the negative pressure monitoring device 2 by applying forward and reverse water pressure. In one embodiment, the suction device 25 includes a first suction member 251 and a second suction member 252 provided at both sides of the pressure sensor 23.
The marine suction foundation provided by the invention is also provided with the suction device 25 so as to solve the problem that sand should be removed if sand enters the negative pressure monitoring device 2 in the using process, when a large amount of sand enters the negative pressure monitoring device 2, the pressure sensor 23 monitors not only water pressure but also soil pressure, and at the moment, the entering soil body can be dispersed, sucked and discharged through the suction device 25, so that only the water pressure is monitored by the pressure sensor 23.
Negative pressure monitoring devices 2 is including locating first negative pressure monitoring devices 21 of top cap 11 and the second negative pressure monitoring devices 22 of locating lateral wall 12 internal surface, first negative pressure monitoring devices 21 are followed top cap 11's center symmetry sets up two at least, and second negative pressure monitoring devices 22 sets up the multiunit along the longitudinal direction of lateral wall 12, and every group second negative pressure monitoring devices 22 includes two at least, and relative lateral wall 12 central line symmetry sets up.
The invention provides a negative pressure monitoring device 2 of an ocean suction type foundation, which comprises a first negative pressure monitoring device 21 arranged on a top cover 11 and a second negative pressure monitoring device 22 arranged on the inner surface of a side wall 12, wherein at least two first negative pressure monitoring devices 21 are symmetrically arranged along the center of the top cover 11, a plurality of groups of second negative pressure monitoring devices 22 are arranged in the longitudinal direction of the side wall 12, each group at least comprises two second negative pressure monitoring devices 22 symmetrically arranged relative to the center line of the side wall 12, so that the negative pressure monitoring data at the same level can be compared, a plurality of negative pressure monitoring data at different levels at the same side can be compared, whether the negative pressure in a barrel accords with a negative pressure change rule or not can be judged, and cause analysis can be carried out.
The first negative pressure monitoring device 21 includes a first pressure sensor and a first protection device including an upper member 241 and a lower member 242. The upper surface of the upper member 241 is provided with a plurality of mounting holes, which are provided with threads, and the upper module of the pressure sensor 23 and the suction device 25 are mounted in the mounting holes and are connected with each other in a sealing manner through the threads. The upper member 241 includes a first connection section 2411 and a second connection section 2412 from top to bottom, the first connection section 2411 has a diameter slightly larger than that of the second connection section 2412, and outer surfaces thereof are provided with threads; the first connection section 2411 is in threaded sealing connection with the top cover 11 of the suction bucket body 1, and the second connection section 2412 is in threaded sealing connection with the lower member 242. The side walls 12 and the bottom of the two are both hollow and provided with holes.
As shown in fig. 1, 4-6, in one embodiment, a plurality of sets of first reinforcing ribs 14 are spaced circumferentially along the sidewall 12 to generally increase the stiffness of the foundation. Two first reinforcing ribs 14 are arranged in each group, an installation gap is formed between the two first reinforcing ribs 14, the second negative pressure monitoring devices 22 are arranged in the installation gap, and a plurality of negative pressure monitoring devices 2 are uniformly arranged at intervals along the longitudinal direction of each group of first reinforcing ribs 14. The second negative pressure monitoring device 22 includes a second pressure sensor and a second protector, which also includes an upper member 241 and a lower member 242, and is installed in a similar manner to the first negative pressure monitoring device 21, except that the first connection section 2411 of the upper member 241 of the second protector is connected to the first reinforcing rib 14.
The first and second protection devices 4 are each provided with a filter screen 243, and the filter screen 243 is fixed between the second connection section 2412 and the lower member 242. In order to avoid soil particles from entering the negative pressure monitoring device 2, further, the negative pressure monitoring device 2 of the present application is further provided with a filter screen 243, soil particles which may enter the protection device 24 are blocked by the filter screen 243, so as to ensure the accuracy of the water pressure sensed by the pressure sensor 23, and ensure that the error of the water pressure sensed by the sensor is within 5% of the true value. The filter screen 243 is generally made of a metal sintered net, and the size of the pores of the metal sintered net not only needs to satisfy the requirements of good water permeability, reducing the influence on water pressure monitoring as much as possible, but also needs to isolate most soil particles.
As shown in fig. 7-8, in one embodiment, the second negative pressure monitoring device 22 further includes a limiting member 26, the limiting member 26 includes a circumferential limiting member 261 and an axial limiting member 262, the circumferential limiting member 261 is in clamping contact with the sidewall 12 of the protection device 24, the axial limiting member 262 includes an upper limiting member 2621 disposed at an upper end of the protection device 24 and a lower limiting member 2622 disposed at a lower end of the protection device 24, the upper limiting member 2621 and the lower limiting member 2622 are respectively fixed on the inner surface of the sidewall 12, and the upper and lower sides are respectively provided with a limiting member to limit the vertical displacement of the negative pressure monitoring device 2.
As shown in fig. 7-9, the axial stop 262 is a U-shaped member, and two wings of the U-shaped member are fixedly connected to the inner surface of the sidewall 12 by fasteners 2623. The fastener 2623 may be a bolt. The circumferential limiting member 261 is an elastic expansion member, such as an expansion spring, one end of the circumferential limiting member 261 is in snap fit with the first reinforcing rib 14, and the other end of the circumferential limiting member 261 is in snap fit with the second protection device 24, so as to limit the direction change and radial displacement of the second negative pressure monitoring device 22.
As shown in fig. 1 to 2, in one embodiment, a connecting member 15 is provided above the top cover 11, a second reinforcing rib 16 is provided below the top cover 11, the connecting member 15 is provided with a first pipeline channel 131 and a communication hole 151 communicating with the outside, the communication hole 151 can also communicate the first pipeline channel 131 with the outlet hole 111, the connecting member 15 is provided with a mounting groove 152 communicating with the first pipeline channel 131, and the first negative pressure monitoring device 21 penetrates through the top cover 11 and extends into the mounting groove 152. In one embodiment, the first reinforcing bead 14, the axial stop 262 and the sidewall 12 surround to form the second line channel 132. Because a longitudinal gap may exist between the upper and lower groups of second negative pressure monitoring devices 22, the pipeline channel 13 is sealed by arranging the sealing block 17. The seal block 17 may also be fixed to the first reinforcing rib 14 by a circumferential stopper 261. The second reinforcing rib 16 is provided with a third pipeline channel 133 communicated with the second pipeline channel 132, the inner part of the second reinforcing rib 16 is provided with a hole to form the third pipeline channel 133, or the second reinforcing rib 16 is grooved towards the rib wall of the top cover 11 to form the third pipeline channel 133 with the top cover 11, and the third pipeline channel 133 is communicated with the wire outlet hole 111. The line of the first negative pressure monitoring passage and the line of the second negative pressure monitoring device 22
The invention also provides a method for installing and using the marine suction foundation, which comprises the following steps:
(1) assembling a marine suction foundation, namely respectively assembling a first negative pressure monitoring device 21 and a second negative pressure monitoring device 22 on a top cover 11 and a side wall 12 of a suction bucket body 1, and connecting the first negative pressure monitoring device and the second negative pressure monitoring device to an external controller through pipelines;
the first negative pressure monitoring device 21 is exemplified as an example of assembling the first negative pressure monitoring device 21. The first pressure sensor 23 and the suction device 25 are screwed to the upper member 241 of the first protector, respectively, to secure the fixation and ensure the sealing. Wrapping the filter screen 243 at the hollow-out area of the second connecting section 2412 of the upper member 241 of the first protection device, and rotating the lower member 242 of the first protection device from bottom to top to realize threaded connection with the upper member 241; the filter screen 243 should not affect the threaded connection of the two members in the height direction;
the connection of the second negative pressure monitoring device 22 with the suction bucket body 1 generally follows the principle from bottom to top. As shown in fig. 1, four sets of A, B, C, D sets of second negative pressure monitoring devices 22 are included from top to bottom. Firstly, the second negative pressure monitoring device 22 at the group A height is installed between two first reinforcing ribs 14 on the inner side wall 12 of the suction bucket main body and is fixed through the telescopic circumferential limiting piece 261, so that the second negative pressure monitoring device 22 is ensured not to generate circumferential and radial displacement; then, the lower limiting piece 2622 and the upper limiting piece 2621 below and above the second negative pressure monitoring device 22 at the group a height are installed to ensure that the monitoring devices do not generate vertical displacement; finally, the sealing block 17 above the a level is installed. Like the group a, B, C, D sets of the second negative pressure monitoring devices 22 are sequentially mounted, and the side wall 12 negative pressure monitoring device 2 is fixed. After the installation is completed, the pipelines such as the data line, the water delivery pipe and the like are hidden in the second pipeline channel 132 formed by the foundation side wall 12, the second negative pressure monitoring device 22, the limiting part 26 and the sealing block 17, so that the pipelines are ensured not to be pulled and disconnected in the processes of sinking, penetrating, loading and recovering of the foundation and are led out to the communication hole 151 through the third pipeline channel 133;
the second negative pressure monitoring device 22 is connected in parallel with the lines of the first negative pressure monitoring device 21. The pipelines of the two types of negative pressure monitoring devices 2 are combined together at the outlet hole 111, led out to a certain position of the basic superstructure, connected with an external controller and used for reading water pressure signals.
(2) Sinking and penetrating the marine suction type foundation to be installed on the seabed, and monitoring the negative pressure below the top cover 11 and inside the side wall 12 of the suction bucket body 1 in the sinking and penetrating installation stage by the negative pressure monitoring device 2; the penetration installation stage comprises the following three stages:
in the foundation penetration installation phase, the second negative pressure monitoring device 22 at group a height first enters the seabed, followed by B, C, D groups of second negative pressure monitoring devices 22 at height, and finally the first negative pressure monitoring device 21.
In the self-weight penetration stage, at the moment of contacting the seabed, under the action of the super-pore water pressure, the negative pressure monitored by the negative pressure monitoring device 2 is obviously greater than the water pressure at the depth; after entering the seabed, the self-weight penetration stage is completed, and the negative pressure monitored by the negative pressure monitoring device 2 is close to the water pressure at the depth;
in the negative pressure penetration stage, the negative pressure monitored by the negative pressure monitoring device 2 should be obviously smaller than the stable negative pressure monitored in the previous stage, and the negative pressure penetration stage is completed, and the negative pressure monitored by the negative pressure monitoring device 2 should be close to the water pressure at the depth.
(3) When the marine suction type foundation enters a service bearing stage, the negative pressure monitoring device 2 detects negative pressure below a top cover 11 and inside a side wall 12 of a suction barrel body 1 in the service stage; the stage mainly comprises three conditions of static load dominance, normal use circulation load dominance and extreme impact load dominance, and negative pressure monitoring of the three conditions is matched with oceanographic monitoring data for use.
For the condition that the static load is dominant, the hydrostatic pressure is required to be around the foundation, negative pressure or super-pore hydraulic pressure cannot be generated, and the pressure monitored by the negative pressure monitoring device 2 is close to the hydrostatic pressure;
for the condition that the circulation load is dominant in normal use, the pressure of the circulation water is around the foundation, and if the negative pressure obtained by the negative pressure monitoring device 2 conforms to the rule of circulation increase or decrease;
for extreme scouring load dominated situations, there should be a sharp increase or decrease in water pressure around the foundation, and at the same level there should be a sharp increase on one side and a sharp decrease on the other.
(4) The recovery of the ocean suction type foundation is carried out, the negative pressure monitoring device 2 detects the negative pressure below the top cover 11 and inside the side wall 12 of the suction barrel body 1 in the recovery process, and at the stage, the inside of the suction type foundation is positive pore water pressure, namely the water pressure is greater than the surrounding hydrostatic pressure.
(5) And (3) the negative pressure monitoring device 2 is detached from the suction bucket body 1 in a modularized manner.
Acquiring a water pressure preset value at any stage in the steps (2) to (4), acquiring and analyzing real-time negative pressure monitoring values below the top cover 11 and inside the side wall 12 of the suction bucket foundation through an external controller, and judging that the pressure sensor 23 is damaged when the real-time negative pressure monitoring values are smaller than the water pressure preset value; when the real-time negative pressure monitoring value is larger than the water pressure preset value, the soil particles entering the negative pressure monitoring device 2 are judged, and the suction device 25 is controlled to perform suction operation.
As shown in fig. 3 to 7, in one embodiment, the suction device 25 includes a first suction member 251 and a second suction member 252 provided at both sides of the pressure sensor 23, and the first suction member 251 and the second suction member 252 alternately perform a pumping operation and a suction operation.
By providing the first suction member 251 and the second suction member 252 on both sides of the pressure sensor 23, the water suction operation and the water suction operation are performed alternately, which facilitates quick and complete removal of soil particles in the negative pressure monitoring device 2.
The method can be realized by adopting or referring to the prior art in places which are not described in the invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only an example of the present invention and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. A marine suction foundation capable of carrying out systematic negative pressure monitoring is characterized by comprising a suction bucket body and a negative pressure monitoring device, wherein the negative pressure monitoring device is used for monitoring negative pressures below a top cover and inside a side wall of the suction bucket body in a penetration installation stage, a service stage and a recovery process;
the suction bucket body comprises a top cover and a side wall, the top cover and the side wall surround to form a bucket body structure with a downward opening, and the top cover is provided with a wire outlet hole;
the suction bucket foundation comprises a suction bucket foundation, a plurality of negative pressure monitoring devices, a plurality of suction bucket foundations and a plurality of suction bucket foundations, wherein the suction bucket foundation is provided with a suction bucket foundation, the suction bucket foundation is arranged on the suction bucket foundation, the suction bucket foundation is provided with a plurality of negative pressure monitoring devices, the negative pressure monitoring devices are respectively arranged on the inner surfaces of the top cover and the side wall, the negative pressure monitoring devices comprise a pressure sensor and a protection device arranged outside the pressure sensor, the suction bucket foundation is provided with a hollow area, the sensing end of the pressure sensor, the pressure sensor is at least extended into the hollow area, the sensing end of the suction bucket foundation, the pressure sensor is a flat-type water pressure sensor, the pressure monitoring device is arranged on the pressure sensor, and is arranged on the suction bucket foundation, and is arranged on the inner surface of the suction bucket foundation, and is arranged on the top cover, and is arranged on the bottom of the suction bucket foundation, and is arranged on the bottom of the suction bucket foundation, and is arranged on the bottom of the suction bucket foundation, and is arranged on the bottom of the bottom;
the negative pressure monitoring device also comprises a suction device arranged in the protection device, the suction device is arranged beside the pressure sensor, and the suction end of the suction device is positioned below the pressure sensor in the longitudinal direction;
the suction bucket body still is equipped with the pipeline passageway, the wire hole intercommunication pipeline passageway, negative pressure monitoring devices's pipeline can be connected in external controller through pipeline passageway.
2. The marine suction foundation of claim 1, wherein the negative pressure monitoring devices comprise a first negative pressure monitoring device disposed on the top cover and a second negative pressure monitoring device disposed on the inner surface of the sidewall, the first negative pressure monitoring devices are at least symmetrically disposed along the center of the top cover, the second negative pressure monitoring devices are disposed along the longitudinal direction of the sidewall, each set of the second negative pressure monitoring devices comprises at least two and are symmetrically disposed relative to the center line of the sidewall.
3. The marine suction foundation capable of performing systematic negative pressure monitoring as claimed in claim 2, wherein a plurality of groups of first reinforcing ribs are arranged at intervals along the circumferential direction of the side wall, two first reinforcing ribs are arranged in each group, an installation gap is formed between the two first reinforcing ribs, the second negative pressure monitoring devices are arranged in the installation gap, and a plurality of negative pressure monitoring devices are arranged at equal intervals along the longitudinal direction of each group of the first reinforcing ribs.
4. The marine suction foundation of claim 3, wherein the protection device comprises an upper member and a lower member, the upper member comprises a first connecting section and a second connecting section, the second connecting section and the lower member are both provided with the hollow area, the first connecting section is connected with the top cover, the second connecting section is connected with the lower member, and the hollow area protrudes below the top cover; or the first connecting section is connected with the first reinforcing rib, the second connecting section is connected with the lower component, and the hollow area is exposed out of the first reinforcing rib;
the protection device further comprises a filter screen, and the filter screen is fixed between the second connecting section and the lower component.
5. The marine suction foundation capable of performing systematic negative pressure monitoring according to claim 3, wherein the second negative pressure monitoring device further comprises a limiting member, the limiting member comprises a circumferential limiting member and an axial limiting member, the circumferential limiting member is in clamping contact with the side wall of the protection device, the axial limiting member comprises an upper limiting member arranged at the upper end of the protection device and a lower limiting member arranged at the lower end of the protection device, and the upper limiting member and the lower limiting member are respectively fixed on the inner surface of the side wall.
6. The marine suction foundation capable of carrying out systematic negative pressure monitoring according to claim 5, wherein the axial position-limiting part is a U-shaped member, two wings of the U-shaped member are fixedly connected to the inner surface of the side wall through fasteners, the circumferential position-limiting part is an elastic expansion part, one end of the circumferential position-limiting part is in clamping fit with the first reinforcing rib, and the other end of the circumferential position-limiting part is in clamping fit with the protection device.
7. The marine suction foundation capable of performing systematic negative pressure monitoring according to claim 3, wherein a connecting member is arranged above the top cover, a second reinforcing rib is arranged below the top cover, the connecting member is provided with a first pipeline channel and a communication hole communicated with the outside, the communication hole can also be communicated with the first pipeline channel and the wire outlet, the connecting member is provided with a mounting groove communicated with the first pipeline channel, the first negative pressure monitoring device penetrates through the top cover and extends into the mounting groove, the first reinforcing rib, the axial limiting member and the side wall surround to form a second pipeline channel, the second reinforcing rib is provided with a third pipeline channel communicated with the second pipeline channel, and the third pipeline channel is communicated with the wire outlet.
8. A method of using a marine suction foundation according to any one of claims 1 to 7, comprising the steps of:
(1) assembling the marine suction foundation, respectively modularly assembling the negative pressure monitoring devices on the top cover and the side wall of the suction barrel body, and connecting the negative pressure monitoring devices to the external controller through pipelines;
(2) sinking and penetrating the marine suction type foundation, sinking and penetrating the marine suction type foundation to the seabed, and monitoring the negative pressure below the top cover and inside the side wall of the suction barrel body in the sinking and penetrating installation stage by the negative pressure monitoring device;
(3) the marine suction type foundation enters a service bearing stage, and the negative pressure monitoring device monitors negative pressure below a top cover and inside a side wall of the suction barrel body in the service stage;
(4) the marine suction type foundation is recovered, and the negative pressure monitoring device monitors the negative pressure below the top cover and inside the side wall of the suction barrel body in the recovery process;
(5) modularizing the negative pressure monitoring device from the suction bucket body;
acquiring a water pressure preset value at any stage in the steps (2) to (4), acquiring and analyzing real-time negative pressure monitoring values below a top cover and inside the side wall of the suction bucket foundation through an external controller, and judging that the pressure sensor is damaged when the real-time negative pressure monitoring values are smaller than the water pressure preset value; and when the real-time negative pressure monitoring value is larger than the water pressure preset value, judging that soil particles enter the negative pressure monitoring device, and controlling the suction device to perform suction operation.
9. The method of using a marine suction foundation as claimed in claim 8, wherein the suction means comprises a first suction member and a second suction member provided at both sides of the pressure sensor, the first suction member and the second suction member alternately performing a water pumping and a water suction operation.
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| CN115450248B (en) * | 2022-09-29 | 2023-07-25 | 山东科技大学 | Ocean suction type foundation anti-pulling bearing capacity early warning device and application method thereof |
| CN115492156B (en) * | 2022-11-15 | 2023-03-17 | 山东科技大学 | Suction foundation capable of monitoring contact state of internal soil body and monitoring method |
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| KR20080073264A (en) * | 2008-04-22 | 2008-08-08 | 주식회사 동아지질 | Sensor apparatus for confirming of filling grout for installing caisson |
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| KR20160059051A (en) * | 2014-11-17 | 2016-05-26 | 현대중공업 주식회사 | A casing for the soil survey of a site of the seabed and method for predicting support force of the casing with the passage of time |
| CN204988829U (en) * | 2015-09-18 | 2016-01-20 | 浙江大学城市学院 | Many UNICOMs say and remold native intelligent former |
| CN206554134U (en) * | 2017-03-13 | 2017-10-13 | 江苏道达风电设备科技有限公司 | A kind of device that pressure monitoring and automatic boosting in bucket foundation are combined for offshore wind farm |
| CN215669726U (en) * | 2021-06-15 | 2022-01-28 | 中交第三航务工程局有限公司 | Device for measuring penetration resistance of barrel type foundation in situ |
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| KR20080073264A (en) * | 2008-04-22 | 2008-08-08 | 주식회사 동아지질 | Sensor apparatus for confirming of filling grout for installing caisson |
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| 薄膜压力传感器(FSR)曲面土压力测量研究;刘开源等;《岩土工程学报》;20200331;第42卷(第3期);第584-591页 * |
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