CN215669308U - Compartment suction type steel cylinder structure for lower compartment design of island-forming revetment - Google Patents
Compartment suction type steel cylinder structure for lower compartment design of island-forming revetment Download PDFInfo
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- CN215669308U CN215669308U CN202120926216.6U CN202120926216U CN215669308U CN 215669308 U CN215669308 U CN 215669308U CN 202120926216 U CN202120926216 U CN 202120926216U CN 215669308 U CN215669308 U CN 215669308U
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Abstract
The utility model provides a lobe suction formula steel cylinder structure that is used for becoming lower subdivision design of island shore protection, steel cylinder device substructure inserts in seabed impervious barrier or if the weak permeable layer, every suction formula steel cylinder device includes a steel cylinder to and at the left and right sides of steel cylinder respectively through vertical connection floor welded opening towards the outside and the cross section be three-quarter circular first arc flank and second arc flank, wherein the diameter of second arc flank slightly is greater than the diameter of first arc flank, make first arc flank can overlap and form a cylinder that is used for backfilling grit in second arc flank, first arc flank and second arc flank and steel cylinder set up along vertical direction parallel and level. The utility model utilizes negative pressure to sink, the first arc-shaped side wing and the second arc-shaped side wing obviously enhance the structural integrity, and the lower bulkhead can realize rapid and active deviation rectification through subdivision.
Description
Technical Field
The utility model relates to a steel cylinder bank protection structure. In particular to a bulkhead suction type steel cylinder structure which is designed for a lower subdivision of an island-forming revetment in offshore and offshore artificial island dyke construction engineering and marine structures in geotechnical engineering and hydraulic engineering.
Background
In recent years, as mankind has advanced the development of the ocean, engineering projects such as oil and gas production platforms, offshore airports, deep water harbors, artificial islands, etc. have gradually emerged in the ocean. However, offshore engineering often needs to face a plurality of construction problems, such as: huge stormy waves on the sea, ultra-thick soft foundation on the sea bottom, short engineering construction operation window period and the like. How to build the island wall structure quickly and efficiently and build the dry land working environment is the key importance of offshore engineering construction.
The existing rapid island forming technology adopts a vibration sinking type super-large-diameter steel cylinder, and an arc-shaped rib plate is combined to be used as an auxiliary cabin to be connected to form a water-stop island wall structure, and finally sand is backfilled to form land. For example, in the east-west artificial island engineering of the great bridge of Gangzhu Australia, the island wall is built by adopting steel cylinders with the height of 40.5-50.5 m, the diameter of 22m and the thickness of 16mm, 8 hydraulic vibration hammers are arranged for vibration sinking, and the two large cylinders are connected by using arc steel plates as auxiliary cabins. However, the vibration sinking technology generally needs to configure a hammer set system with a plurality of specific types of vibration hammers to be linked according to the diameter and the weight of the steel cylinder, so that the manufacturing cost is high, the hammer set is heavy, and the sinking time is long. In addition, from the perspective of the ocean foundation, the large-diameter cylinder can generate larger disturbance to the surrounding soil body in the process of vibration sinking, the sensitivity of the ocean clay is higher, the strength of the ocean clay can be rapidly reduced and cannot be recovered in a short period, and the stability of the island wall structure mainly depends on the resistance of the surrounding foundation; after the sand soil is backfilled, the contact surface of the bottom of the sand soil and the seabed soft sludge is discharged, so that the sludge squeezing phenomenon can occur, and the stability of the steel cylinder is influenced; the adjacent large cylinders are connected by the arc rib plates, and although the water stopping effect can be achieved, the structural integrity of the island wall is poor.
In addition, the inclination control requirement is high when the large cylinder is installed, the deviation rectification and leveling of the large cylinder can be indirectly realized only by adjusting the vibration of the vibration hammers in different directions in the conventional vibration sinking method, the method belongs to passive deviation rectification or indirect deviation rectification, and the designed verticality is difficult to achieve when hard strata are met.
Therefore, a new island wall structure form is required to ensure not only the rapid installation of the island wall structure but also the overall stability thereof.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a bulkhead suction type steel cylinder structure which can realize quick deviation correction in the sinking process and is used for the lower subdivision design of the island-forming revetment.
The technical scheme adopted by the utility model is as follows: a bulkhead suction type steel cylinder structure for a lower subdivision design of an island-forming revetment is an arc-shaped revetment structure which is formed by connecting a plurality of steel cylinder devices end to end, inserting the lower parts of the steel cylinder devices into a seabed impervious layer or a weak permeable layer, wherein the steel cylinder devices comprise steel cylinders, a first arc-shaped side wing and a second arc-shaped side wing which are connected with two sides of each steel cylinder respectively through connecting rib plates, the upper end surfaces and the lower end surfaces of the first arc-shaped side wing and the second arc-shaped side wing are arranged in parallel and level with the upper end surface and the lower end surface of each steel cylinder, and the opening is far away from each steel cylinder, the diameter of the second arc-shaped side wing is larger than that of the first arc-shaped side wing, so that a cylinder for backfilling gravel can be formed by embedding the first arc-shaped side wing of the next steel cylinder device into the second arc-shaped side wing of the previous steel cylinder device together, and the steel cylinders are divided into a lower bay and an upper part by a horizontally arranged subdivision plate, an inner sleeve is coaxially arranged in the lower compartment, the inner sleeve is equal to the lower compartment in height, N compartments with the same size are formed between the inner wall of the lower compartment and the outer wall of the inner sleeve at equal intervals through N clapboards which are vertically arranged, a water pumping/air hole is formed on the subdivision plate corresponding to each subdivision and the inner sleeve, each water pumping/air hole is connected with a hose which is communicated with the corresponding subdivision or the inner sleeve and is used for pumping water or air from the subdivision or the inner sleeve, the other end of each hose is correspondingly connected with a vacuum barrel arranged outside the steel cylinder device, each vacuum barrel is connected with a vacuum pump, the upper portion of vacuum bucket is provided with the snuffle valve that is used for discharging the gas of taking out from the subdivision, the lower part of vacuum bucket is provided with the sluicing valve that is used for discharging the water of taking out from the subdivision.
The utility model relates to a bulkhead suction type steel cylinder structure designed for a lower subdivision of an island-forming revetment, which sinks by utilizing negative pressure, the structural integrity is obviously enhanced by arc-shaped side wings at two sides, and the lower bulkhead can realize rapid and active deviation correction through subdivision. Compared with the prior art, the utility model has the following advantages:
1. the structure applies negative pressure to the lower compartment through the vacuum pump to sink, avoids using a vibration hammer, requires less equipment, consumes short time and low cost, and effectively improves the field construction efficiency.
2. The bottom of the structure directly acts on the surface of the soft soil foundation, so that the uplift and the flow of foundation soil are prevented, and the bearing capacity of the structure is improved.
3. The water (gas) pumping hoses are connected with the lower cabin body, the vacuum tank can control the negative pressure in each water (gas) pumping hose, and the negative pressure of each cabin body can be flexibly controlled, so that the sinking and the rectification are facilitated.
4. The size of the center cabin of the lower cabin and the number of the side cabins can be flexibly set according to engineering requirements, rapid and active deviation correction in the sinking process can be realized, and the deviation correction device is compared with the traditional deviation correction device with a vibration hammer, can not disturb the peripheral soil body, and is good in stability.
5. The lateral support of the steel cylinder is enhanced by the connecting rib plates, and the overall stability of the steel cylinder is obviously improved by the large and small arc-shaped side wings.
6. The device can utilize the lower compartment for offshore self-floating towing.
Drawings
FIG. 1 is a schematic structural view of a steel cylinder apparatus of a bulkhead suction type steel cylinder construction for a lower subdivision design of an island-forming revetment;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of two sets of steel cylinder devices interconnected in-line;
FIG. 4 is a schematic view of two sets of steel cylinder devices connected to each other at an angle;
FIG. 5 is a schematic illustration of a steel cylinder apparatus undergoing sinking;
FIG. 6 is a schematic view of the adjustment of a steel cylinder device when it is tilted during penetration;
fig. 7 is a schematic illustration of the formation of an artificial island or deep water dock.
In the drawings
1: a steel cylinder 2: connecting rib plate
3: first arc-shaped side wing 4: second arc flank
5: the cabin separation plate 6: lower compartment
7: upper compartment 8: cylinder
9: inner sleeve 10: partition board
11: a subdivision 12: flexible pipe
13: the vacuum drum 14: vacuum pump
15: the air release valve 16: water drain valve
17: water/air pumping hole 18: backfilling sandy soil
19: sea level 20: sea bottom surface
21: impermeable layer 22: artificial island or deep water wharf
Detailed Description
The present invention will be described in detail with reference to the following embodiments and accompanying drawings.
As shown in fig. 1 and fig. 2, the utility model relates to a lower compartment designed bulkhead suction type steel cylinder structure for island-forming revetment, which is an arc-shaped revetment structure formed by connecting a plurality of steel cylinder devices end to end with their lower portions inserted into a seabed impervious layer or a permeable layer, wherein the steel cylinder device comprises a steel cylinder 1, a first arc-shaped side wing 3 and a second arc-shaped side wing 4 connected to two sides of the steel cylinder 1 by welding through a connecting rib plate 2, the upper and lower end surfaces of the first arc-shaped side wing 3 and the second arc-shaped side wing 4 are correspondingly arranged flush with the upper and lower end surfaces of the steel cylinder 1, and the opening is far away from the steel cylinder 1, wherein the diameter of the second arc-shaped side wing 4 is larger than that of the first arc-shaped side wing 3, so that a cylinder 8 for backfilling gravel can be formed by embedding the first arc-shaped side wing 3 of the latter steel cylinder device into the second arc-shaped side wing 4 of the former steel cylinder device, as shown in fig. 3 and 4, in fig. 4, in both the two connected steel cylinder devices, the included angle between the center of the first arc-shaped side wing 3 and the center of the second arc-shaped side wing 4 and the connecting line between the center of the steel cylinder 1 is equal to 180 degrees, that is, the included angle is on a first straight line.
Fig. 5 shows that when two steel cylinder devices are connected, the included angles between the centers of the first arc-shaped side wing 3 and the second arc-shaped side wing 4 in the right steel cylinder device and the center of the steel cylinder 1 are respectively equal to 180 degrees, namely, on a first straight line, and the included angles between the centers of the first arc-shaped side wing 3 and the second arc-shaped side wing 4 in the left steel cylinder device and the center of the steel cylinder 1 are respectively less than 180 degrees, so that certain bending is formed during connection.
As shown in fig. 1 and 2, the steel cylinder 1 is divided into a lower compartment 6 and an upper compartment 7 by a horizontally arranged compartment plate 5, and the compartment plate 5 is connected with the inner wall of the steel cylinder 1 by welding. An inner sleeve 9 is coaxially arranged in the lower compartment 6 through welding, the inner sleeve 9 is equal to the lower compartment 6 in height, N compartments 11 with the same size are formed between the inner wall of the lower compartment 6 and the outer wall of the inner sleeve 9 at equal intervals through N partition plates 10 which are vertically arranged through welding, N can be 4-12 according to the actual engineering requirement, and the diameter of the inner sleeve 9 and the position of the compartment plate 5 can be flexibly adjusted according to the actual engineering requirement. A water pumping/air hole 17 is formed on the compartment plate 5 corresponding to each compartment 11 and the inner sleeve 9, a hose 12 communicated with the corresponding compartment 11 or the inner sleeve 9 and used for pumping water or pumping air from the compartment 11 or the inner sleeve 9 is connected to each water pumping/air hole 17, the other end of each hose 12 is correspondingly connected with a vacuum barrel 13 arranged outside the steel cylinder device, and each vacuum barrel 13 is connected with a vacuum pump 14.
An air release valve 15 for discharging air drawn out from the sub-chamber 11 is provided at an upper portion of the vacuum tub 13, and a drain valve 16 for discharging water drawn out from the sub-chamber 11 is provided at a lower portion of the vacuum tub 13.
When the steel cylinder device is inclined when the negative pressure sinks, the water (gas) pumping valve of the low chamber is closed to pump the high sub-chamber or the high sub-chamber and the middle chamber (the inner sleeve 9 forms the middle chamber), or the gas release valve of the vacuum barrel is used for discharging water (gas) to the low sub-chamber or the low sub-chamber and the middle chamber, so that the rapid deviation correction is realized. And after the deviation correction is finished, opening the water pumping or air extracting valves of all the sub-cabins to perform negative pressure sinking. If the tilt problem occurs again, the above process is repeated until the sink is lowered to a predetermined depth. Gravel is backfilled in the upper bulkhead 7 after the sink is installed in place.
The application example of the bulkhead suction type steel cylinder structure of the utility model used for the lower compartment design of the island-forming revetment is as follows:
1) the steel cylinder devices which are prefabricated in a factory and have required number and set size are transported to a specified place in a self-floating towing mode at sea, and are lifted by a professional lifting device to be submerged, such as a in fig. 5, ready to be in place;
2) beginning to sink, using a positioning system to enable the steel cylinder device to be in place at a designated position, firstly injecting a certain amount of water into an upper bay of the steel cylinder device, and enabling the steel cylinder device to sink under the self-weight of the steel cylinder device under the action of the water and the self-weight until a lower bay forms a closed condition, such as water adding gravity sinking in a figure 5;
3) after the self-weight sinking is finished, one end of each hose for pumping water or air is respectively connected to the water pumping/air holes on the subdivision plates and communicated with the corresponding subdivision, the other end of each hose is connected with the vacuum barrel, the vacuum barrel is connected with the vacuum pump, the vacuum pump is started to pump water and air in each subdivision, so that the steel cylinder device sinks to a set depth under the action of negative pressure, and the suction force in the figure 5 sinks;
4) after the sinking is finished, backfilling sandy soil or water in the upper compartment according to the set requirement, such as backfilling sandy soil or water in d in fig. 5;
5) continuing to sink the next steel cylinder device, and embedding the first arc-shaped side wing of the next steel cylinder device into the second arc-shaped side wing of the previous steel cylinder device after the next steel cylinder device is sunk, so as to form a cylinder for backfilling gravel together, wherein the second steel cylinder device sinks as shown in e in fig. 5;
6) backfilling sandy soil in the formed cylinder according to design requirements, such as backfilling sandy soil or water at the f side wing in fig. 5;
7) repeating the steps 2) to 6) until all the steel cylinder devices are completely sunk, and forming an artificial island or a deep water wharf 22;
8) backfilling the inside of the artificial island or deep water wharf 22 and consolidating the foundation as shown in fig. 7.
In the above application, during the sinking process of the steel cylinder device, the situation that one side is high and the other side is low occurs, as shown in a in fig. 6, a greater negative pressure is applied to the sub-chamber at the high side by the vacuum pump, and the air release valve of the vacuum barrel communicated with the sub-chamber at the low side is opened, as shown in b in fig. 6; or the air release valve is not opened, water or air is filled into the sub-compartment at the low side, so that the effects of sub-compartment sinking at the high side and sub-compartment floating at the low side are achieved, and therefore rapid and active deviation rectification is achieved, as shown in b in fig. 6. The specific process is that the other cabins are closed by pumping the high cabin, the other cabins are closed by pumping the high cabin and the middle cabin, water or gas is discharged from the low cabin, and water or gas is discharged from the low cabin and the middle cabin.
The steel cylinder device for forming the corner position of the artificial island or the deepwater wharf adopts the steel cylinder device as shown in fig. 4, wherein the included angle between the circle centers of the first arc-shaped side wing and the second arc-shaped side wing which are connected to the two sides of the steel cylinder and the connecting line of the circle centers of the steel cylinder is a set angle smaller than 180 degrees.
Claims (2)
1. The utility model provides a lobe suction formula steel cylinder structure for becoming design of lower subdivision of island shore protection, is by a plurality of steel cylinder device end to end connection and the lower part inserts the arc shore protection structure that forms jointly in seabed impervious barrier or if the weak permeable barrier, steel cylinder device including steel cylinder (1), connect through connecting floor (2) respectively first arc flank (3) and second arc flank (4) of steel cylinder (1) both sides, the terminal surface corresponds the parallel and level setting with the last terminal surface of steel cylinder (1) about first arc flank (3) and second arc flank (4), and the steel cylinder (1) is kept away from to the opening, wherein, the diameter of second arc flank (4) is greater than the diameter of first arc flank (3) to can form a drum (8) that is used for backfilling grit jointly in the second arc flank (4) of preceding steel cylinder device through embedding first arc flank (3) of following steel cylinder device in the second arc flank (4) of preceding steel cylinder device ) The steel cylinder (1) is divided into a lower compartment (6) and an upper compartment (7) by a horizontally arranged subdivision plate (5), and the steel cylinder is characterized in that an inner sleeve (9) is coaxially arranged in the lower compartment (6), the inner sleeve (9) is as high as the lower compartment (6), N equally-sized subdivisions (11) are formed between the inner wall of the lower compartment (6) and the outer wall of the inner sleeve (9) at equal intervals by N vertically arranged clapboards (10), N is 4-12, a water pumping/air hole (17) is formed on the subdivision plate (5) corresponding to each subdivision (11) and the inner sleeve (9), and a hose (12) communicated with the corresponding subdivision (11) or inner sleeve (9) and used for pumping water from the subdivision (11) or the inner sleeve (9) or exhausting air is connected to each water pumping/air hole (17), every the other end of hose (12) corresponds to connect and sets up at outside a vacuum bucket (13) of steel drum device, every vacuum bucket (13) all connect a vacuum pump (14), the upper portion of vacuum bucket (13) is provided with and is used for discharging from the snuffle valve (15) of taking out in subdivision (11), the lower part of vacuum bucket (13) is provided with and is used for discharging from the drainage valve (16) of taking out water in subdivision (11).
2. The bulkhead suction type steel cylinder structure of the lower subdivision design for the island-forming revetment according to claim 1, wherein the angle between the circle centers of the first arc-shaped side wing (3) and the second arc-shaped side wing (4) and the line connecting the circle centers of the steel cylinders (1) is less than or equal to 180 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120926216.6U CN215669308U (en) | 2021-04-30 | 2021-04-30 | Compartment suction type steel cylinder structure for lower compartment design of island-forming revetment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120926216.6U CN215669308U (en) | 2021-04-30 | 2021-04-30 | Compartment suction type steel cylinder structure for lower compartment design of island-forming revetment |
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| Publication Number | Publication Date |
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| CN215669308U true CN215669308U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120926216.6U Active CN215669308U (en) | 2021-04-30 | 2021-04-30 | Compartment suction type steel cylinder structure for lower compartment design of island-forming revetment |
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| CN (1) | CN215669308U (en) |
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2021
- 2021-04-30 CN CN202120926216.6U patent/CN215669308U/en active Active
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