CN114457750A - Construction method of large-diameter steel-concrete combined cylindrical structure - Google Patents
Construction method of large-diameter steel-concrete combined cylindrical structure Download PDFInfo
- Publication number
- CN114457750A CN114457750A CN202210381215.7A CN202210381215A CN114457750A CN 114457750 A CN114457750 A CN 114457750A CN 202210381215 A CN202210381215 A CN 202210381215A CN 114457750 A CN114457750 A CN 114457750A
- Authority
- CN
- China
- Prior art keywords
- steel
- concrete
- cylinder
- dowel
- construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 claims abstract description 27
- 238000009434 installation Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000011900 installation process Methods 0.000 claims description 7
- 238000009417 prefabrication Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
- E02B3/066—Quays
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/0017—Means for protecting offshore constructions
- E02B17/003—Fenders
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
- E02D5/526—Connection means between pile segments
Abstract
The invention provides a construction method of a large-diameter steel-concrete combined cylindrical structure, which comprises the following steps: manufacturing a steel cylinder body and a dowel bar: manufacturing a steel cylinder and a plurality of dowel bars, wherein the lower end part of each dowel bar is provided with a notch; installation of dowel bars and steel cylinder: vertically inserting dowel bars to the upper end part of the cylinder wall of the steel cylinder body at intervals through the gaps for fixing; mounting of the support structure: the supporting structure comprises a plurality of transversely arranged supporting rods, one end of each supporting rod is connected with a force transmission rod, and the other ends of the supporting rods are intersected and fixed on the central axis of the steel cylinder; manufacturing and installing an annular replacing punch: fixedly connecting the annular counterbeat with the upper end part of the dowel bar; and (3) vibration and sinking construction: installing a vibration and sinking tool for vibration and sinking, and dismantling the annular replacement and supporting structure after vibration and sinking construction is finished; prefabricating the concrete cylinder and installing the concrete cylinder. The construction method can effectively reduce the construction cost, is easy for engineering manufacture, and the obtained cylindrical structure has strong durability.
Description
Technical Field
The invention belongs to the technical field of offshore artificial island cylinder revetment structures in soft foundation areas, and particularly relates to a construction method of a large-diameter steel-concrete combined cylindrical structure.
Background
The large-diameter steel cylinder revetment structure is a novel structure applied to marine artificial island construction, and through application in super projects such as a Hongzhu Macao bridge and a deep-middle channel, the structure is verified to have the characteristics of quick construction, engineering manufacturing, small environmental influence and the like, and is a key technology for realizing quick construction of an artificial island.
However, the diameter of the steel cylinder revetment structure is relatively large, generally between ten meters and several tens of meters, for example, the diameter of a steel cylinder used for a manned island of a majora bealei bridge in hong Kong is 22m, the diameter of a steel cylinder used for a manned island in the west of a deep middle channel is 28m, and the diameter of a steel cylinder used for a manned island in a Mitsui airport is 30 m. Therefore, the manufacture of the steel cylinder bank protection structure needs to consume a large amount of steel, and the problems of high production construction cost, poor durability and the like of the steel cylinder bank protection structure are caused.
Disclosure of Invention
The invention provides a construction method of a large-diameter steel-concrete combined cylindrical structure aiming at the technical problems of high production and construction cost and poor durability in the prior art, the construction method can effectively reduce the construction cost, is easy to engineer and manufacture, and the obtained cylindrical structure has strong durability.
In order to achieve the purpose, the invention provides a construction method of a large-diameter steel-concrete combined cylindrical structure, which comprises the following steps:
manufacturing a steel cylinder body and a dowel bar: manufacturing a steel cylinder body and a plurality of dowel bars according to the required size, wherein a notch is formed in the lower end part of each dowel bar, and the notch has a radian matched with the cylinder wall of the steel cylinder body; the height of the steel cylinder body is the designed vibration sinking depth;
installation of dowel steel and steel barrel: vertically inserting dowel bars to the upper end part of the cylinder wall of the steel cylinder body at intervals through the openings at the lower end part for fixing;
mounting a supporting structure: the supporting structure comprises a plurality of supporting rods which are transversely arranged, the number of the supporting rods in one supporting structure is the same as that of the force transmission rods, one end of each supporting rod is connected with the force transmission rod, and the other ends of the supporting rods are intersected and fixed on the central axis of the steel cylinder;
manufacturing and installing an annular replacing punch: determining the height of the annular counterattack according to the size of the vibration sinking tool, manufacturing the annular counterattack, and fixedly connecting the annular counterattack with the upper end part of the dowel bar to finish a first-stage assembly body of the large-diameter steel-concrete combined cylindrical structure;
and (3) vibration and sinking construction: transporting the first-stage assembly to a region to be hoisted, installing a vibration sinking tool, hoisting the first-stage assembly to an installation position, performing vibration sinking construction, stopping vibration sinking when the steel cylinder reaches a designed elevation, dismantling the vibration sinking tool, and further dismantling the annular counterattack and the supporting structure;
prefabricating a concrete cylinder: firstly, carrying out sectional design on the whole concrete cylinder, then carrying out sectional prefabrication on the concrete cylinder, and reserving a plurality of through holes for the dowel bars to penetrate in the cylinder wall of the concrete cylinder in the prefabrication process, wherein the positions of the through holes correspond to the positions of the dowel bars;
installation of the concrete cylinder: the concrete cylinders are sequentially installed, and the dowel bars penetrate through the through holes in the installation process, so that the concrete cylinders and the steel cylinders are integrated.
In some embodiments of the present invention, before the step of installing the dowel bar and the steel cylinder, the method further comprises the steps of manufacturing and installing a connecting structure: the connecting structure comprises a connecting plate and a shear plate, a connecting hole is formed in the middle of the connecting plate, the dowel bar penetrates into the connecting hole, the lower surface of the connecting plate is flush with the top of the notch, the connecting plate is fixed to the outer surface of the dowel bar at the position, the shear plate is fixedly installed between the lower surface of the connecting plate and the dowel bar, and the number of the shear plates is greater than or equal to 2.
In some embodiments of the invention, after the notch at the lower end part of the dowel bar is inserted into the upper end part of the cylinder wall of the steel cylinder, the top end of the cylinder wall of the steel cylinder is contacted and fixed with the connecting plate; the upper surfaces of the connecting plates of all the connecting structures are on the same horizontal plane.
In some embodiments of the invention, the dowel is a hollow steel tube, and after the support structure is installed, concrete is poured into the dowel.
In some embodiments of the present invention, during the installation process of the ring-shaped replacement tie, the first flange is fixedly connected to the upper end of the force transmission rod, the second flange is fixedly connected to the lower surface of the ring-shaped replacement tie, and the first flange and the second flange are fixedly connected by bolts, so as to achieve the connection between the ring-shaped replacement tie and the force transmission rod.
In some embodiments of the invention, reinforcing ribs are arranged between the upper surface of the second flange and the annular studs, and the number of the reinforcing ribs is greater than or equal to 2.
In some embodiments of the present invention, in the prefabrication process of the concrete cylinder, a tongue-and-groove structure is provided at the joint of each section of the cylinder, specifically including a protrusion portion and a groove portion provided on two adjacent sections of the cylinder; in the installation process of the concrete cylinder, the protruding parts and the groove parts of the two adjacent sections of cylinders are butted and fixed.
In some embodiments of the present invention, before the vibration sinking construction, the method further comprises the step of preparing on site: and cleaning the site foundation of the area to be installed to enable the foundation environment to reach a basically flat condition.
In some embodiments of the invention, further comprising: according to construction requirements, arranging and installing a plurality of large-diameter steel-concrete combined cylindrical structures at corresponding positions; the concrete cylinder body of each large-diameter steel-concrete combined cylindrical structure extends outwards from the outer side to form an extending structure, the extending structure and the cylinder wall of the concrete cylinder body are integrally prefabricated and formed, and the extending structure between two adjacent cylindrical structures forms an auxiliary compartment.
In some embodiments of the present invention, after arranging and installing the plurality of diameter steel-concrete composite cylindrical structures, the method further comprises a backfill construction: and backfilling the cylindrical structure and the auxiliary grid bins, and treating the soft foundation to complete the construction and installation of the integral revetment structure.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) the construction method of the large-diameter steel-concrete combined cylindrical structure provided by the invention utilizes the cooperation of the concrete cylinder and the steel cylinder to carry out construction, can replace the existing steel cylinder bank protection structure, effectively saves steel materials and reduces the construction cost under the condition of ensuring that the use requirement of the cylinder bank protection is met, and has the advantages of strong durability, quick construction, easiness in engineering manufacture, small influence on the environment and the like.
(2) The construction method of the large-diameter steel-concrete combined cylindrical structure provided by the invention has the advantages that the steel cylinder is adopted as the lower cylinder structure, the construction requirement in a harder soil layer can be met, the problem that the concrete cylinder structure is difficult to shake and sink in the harder soil layer is solved, meanwhile, the upper concrete cylinder structure has high rigidity, and can be used for the wharf upper structure, bear the horizontal force action and widen the application range of the large-diameter cylinder structure.
(3) The construction method of the large-diameter steel-concrete combined cylindrical structure can improve the wave splash protection effect, does not need to add anti-corrosion treatment, is simple to manufacture and convenient to construct, and reduces the requirement on the lifting capacity of lifting equipment.
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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic longitudinal sectional view of a first stage assembly of an embodiment of the present invention;
FIG. 2 is a top view of a support structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of a connection structure in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a connecting plate according to an embodiment of the present invention;
FIG. 5 is a bottom view of the attachment structure in an embodiment of the present invention;
FIG. 6a is a schematic longitudinal sectional view of the cylinder wall of the concrete cylinder at the position of the through hole according to the embodiment of the present invention;
FIG. 6b is a schematic longitudinal sectional view of the cylinder wall of the concrete cylinder at a position where no through hole is formed according to the embodiment of the present invention;
FIG. 7 is a schematic illustration of a concrete cylinder wall segment installation;
FIG. 8 is a partial enlarged view of portion A of FIG. 7;
FIG. 9 is a partial enlarged view of portion B of FIG. 1;
FIG. 10 is a schematic diagram of the combination arrangement of the large-diameter steel-concrete combination cylindrical structure according to the embodiment of the invention;
in the figure:
1. a steel cylinder body;
2. a dowel bar; 21. opening the gap;
3. a support structure; 31. a support bar;
4. annular replacing;
5. a concrete cylinder; 51. a through hole; 52. an overhang structure;
6. a connecting structure; 61. a connecting plate; 611. connecting holes; 62. a shear plate;
71. a first flange plate; 72. a second flange plate; 73. a bolt; 74. a reinforcing rib plate;
8. a tongue-and-groove structure; 81. a boss portion; 82. and a groove part.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature.
Further, in the description of the present invention, the "large diameter" means a diameter exceeding 15 m.
The embodiment of the invention provides a construction method of a large-diameter steel-concrete combined cylindrical structure, which comprises the following steps:
manufacturing a steel cylinder body 1 and a dowel bar 2: as shown in fig. 1-3, a steel cylinder 1 and a plurality of dowel bars 2 are manufactured according to the required size, a notch 21 is arranged at the lower end part of each dowel bar 2, and the notch 21 has a radian matched with the cylinder wall of the steel cylinder 1; the height of the steel cylinder 1 is the designed vibration sinking depth.
Installation of dowel bar 2 and steel barrel 1: as shown in fig. 1, the dowel bar 2 is vertically inserted into the upper end of the cylinder wall of the steel cylinder 1 at intervals through the slits 21 at the lower end thereof for fixation. It will be understood that the width of the slit 31 is slightly wider than the thickness of the wall of the steel cylinder 1, so that the upper end of the steel cylinder 1 is smoothly inserted into the slit 31. Preferably, the dowel bars 2 are uniformly distributed along the circumferential direction of the steel cylinder 1; in the embodiment shown in fig. 2, 8 force transfer rods 2 are provided, it being understood that a person skilled in the art may design the number of force transfer rods 2 according to the strength and stability requirements required for the tubular structure, and for example more than 8 force transfer rods 2 may be provided.
Mounting of the support structure 3: the supporting structure 3 comprises a plurality of supporting rods 31 which are transversely arranged, the number of the supporting rods 31 in one supporting structure is the same as that of the dowel bars 2, one end of each supporting rod 31 is connected with the dowel bar 2, and the other ends of the supporting rods 31 are intersected and fixed on the central axis of the steel cylinder 1. The supporting structure 3 supports each dowel bar 2 in the transverse direction, so that the whole structure is more stable, and the change of the shape of the cylindrical structure due to the action of external force in the construction process is avoided; preferably, the support structure 3 is provided with two or more parallel supports for the force rods 2 at different levels.
Manufacturing and installing a ring-shaped replacing punch 4: and determining the height of the annular offset 4 according to the size of the vibration sinking tool, manufacturing the annular offset 4, and fixedly connecting the annular offset 4 with the upper end part of the dowel bar 2 to complete the first-stage assembly of the large-diameter steel-concrete combined cylindrical structure, as shown in fig. 1.
And (3) vibration and sinking construction: transporting the first-stage assembly to a region to be hoisted, installing a vibration sinking tool, hoisting the first-stage assembly to an installation position, performing vibration sinking construction, stopping vibration sinking when the steel cylinder 1 reaches a design elevation, namely after the steel cylinder 1 completely enters a soil layer, dismantling the vibration sinking tool, and further dismantling the annular replacing beating 4 and the supporting structure 3. The vibration sinking tool is concretely a vibration hammer set, a clamp and the like.
Prefabricating the concrete cylinder 5: firstly, the integral concrete cylinder 5 is designed in a segmented mode, then the concrete cylinder 5 is prefabricated in a segmented mode, a plurality of through holes 51 for the dowel bars 2 to penetrate through are reserved in the cylinder wall of the concrete cylinder 5 in the prefabricating process, and the positions of the through holes 51 correspond to the positions of the dowel bars 2. The concrete cylinder 5 has a longitudinal section at the location of the through-hole 51, see fig. 6a, and the concrete cylinder 5 has a longitudinal section at the location of the non-opened through-hole 51, see fig. 6 b. It will be appreciated that the diameter of the through bore 51 is slightly larger than the outer diameter of the dowel 2 so that the dowel can be inserted smoothly into the through bore 51.
Installation of the concrete cylinder 5: as shown in fig. 7, the concrete cylinder 5 is installed in sequence, and the dowel bar 2 is inserted through the through hole 51 during installation, so that the concrete cylinder 5 and the steel cylinder 1 are integrated.
According to the construction method of the large-diameter steel-concrete combined cylindrical structure, the concrete cylinder and the steel cylinder are matched for construction, the existing steel cylinder bank protection structure can be replaced, and the production construction cost of the existing steel cylinder bank protection structure is reduced; the steel cylinder body is adopted as the cylinder body structure at the lower part, so that the construction requirement in a harder soil layer can be met, the problem that the concrete cylinder body structure is difficult to sink in the harder soil layer is solved, the use requirement of the cylinder revetment structure is met, meanwhile, the construction cost can be effectively reduced, the wave splash protection effect is improved, the addition of anti-corrosion treatment is not needed, the manufacturing is simple, the construction is convenient, the requirement on the lifting capacity of lifting equipment is reduced, and the advantages of strong durability, quick construction, easiness in engineering manufacturing, small influence on the environment and the like are realized; meanwhile, the upper part of the wharf adopts a concrete cylinder structure with high rigidity, and the concrete cylinder structure can be used for the wharf upper structure, bears the action of horizontal force and widens the application range of the large-diameter cylinder structure.
In some embodiments, before the step of installing the dowel 2 and the steel cylinder 1, the method further comprises the steps of manufacturing and installing the connecting structure 6: as shown in fig. 3 to 5 and 8, the connecting structure 6 includes a connecting plate 61 and shear plates 62, a connecting hole 611 is formed in the middle of the connecting plate 61, the dowel 2 is inserted into the connecting hole 611 and the lower surface of the connecting plate 61 is flush with the top of the notch 21, the connecting plate 61 is fixed to the outer surface of the dowel 2 at the position, the shear plates 62 are fixedly installed between the lower surface of the connecting plate 61 and the dowel 2 for supporting the connecting plate 61, and the number of the shear plates 62 is greater than or equal to 2. In the embodiment shown in fig. 5, the number of shear plates is provided with 4. Preferably, the connecting plate 61 is a circular steel plate; the diameter of the connection hole 611 is slightly larger than the outer diameter of the dowel 2 so that the dowel 2 is smoothly inserted therethrough.
In some embodiments, the upper edge of the shear plate 62 is welded to the lower surface of the connecting plate 61, and the inner edge of the shear plate 62 is welded to the outer wall of the dowel 2, so as to achieve a stable connection.
According to the construction method provided by the embodiment of the invention, the steel cylinder body 1 and the dowel bar 2 are stably connected by matching the specially designed connecting structure 6 with the notch design, the connecting structure 6 is only composed of two parts, the structure is simple, the cost is low, the connection stability is good, in the process of installing and vibrating and sinking the cylindrical structure, the uniform transmission of force can be realized, and the cylinder body is prevented from being damaged.
Further, as shown in fig. 8, after the notch 21 at the lower part of the dowel bar 2 is inserted into the upper end part of the cylindrical wall of the steel cylinder 1, the top end of the cylindrical wall of the steel cylinder 1 is fixed in contact with the connecting plate 61. Preferably, the upper surfaces of the connection plates 61 of all connection structures 6 are in the same horizontal plane.
In the above-described embodiment, as an embodiment of the fixed connection, a welding method may be selected for the fixation.
In some embodiments, the dowel 2 is a hollow steel tube, and after the support structure is installed, fine aggregate concrete is poured into the dowel.
In some embodiments, as shown in fig. 9, during the installation of the ring-shaped break-in 4, the first flange 71 is fixedly connected to the upper end of the dowel bar 2, the second flange 72 is fixedly connected to the lower surface of the ring-shaped break-in 4, and the first flange 71 and the second flange 72 are fixedly connected through bolts 73, so that the connection between the ring-shaped break-in 4 and the dowel bar 2 is realized. Wherein the number of bolts 73 is 2 or more.
Further, reinforcing ribs 74 are arranged between the upper surface of the second flange 72 and the ring-shaped studs 4, and the number of the reinforcing ribs 74 is greater than or equal to 2. Preferably, the number of the reinforcing ribs 74 is 2 or more and is uniformly arranged along the circumferential direction of the second flange 72.
In some embodiments, the ring tie-downs 4 and the first flange 71, the second flange 72, the bolts 73, and the reinforcing ribs 74 are all steel structures to enhance the rigidity of the tubular structure and the stability of the connection.
In some embodiments, as shown in fig. 6a and 6b, during the prefabrication process of the concrete cylinder 5, the joint of each section of cylinder is provided with a tongue-and-groove structure 8, specifically comprising a protruding portion 81 and a groove portion 82 which are arranged on two adjacent sections of cylinder; in the installation process of the concrete cylinder 5, the protruding part 81 and the groove part 82 of two adjacent sections of cylinders are butted and fixed, so that the prefabricated structures are connected more stably, and the installation precision is higher.
In some embodiments, the method further comprises the step of preparing on site before the vibration sinking construction: and cleaning the site foundation of the area to be installed to enable the foundation environment to reach a basically flat condition.
In some embodiments, further comprising: as shown in fig. 10, a plurality of large-diameter steel-concrete combined cylindrical structures are arranged and installed at corresponding positions according to construction requirements; the outer side of each concrete cylinder 5 of the large-diameter steel-concrete combined cylindrical structure extends outwards to form an extending structure 52, the extending structures 52 and the cylinder wall of the concrete cylinder 5 are integrally prefabricated and formed, and the extending structures 52 between two adjacent cylindrical structures can form an auxiliary compartment. The overhanging structure 52 may be straight or arc, and those skilled in the art can design the overhanging structure according to actual needs, and the angle of the overhanging structure 52 can also be designed according to the requirements of the enclosed revetment, and the present invention is not limited in detail.
Further, backfill construction is further included after the steps: and backfilling the cylindrical structure and the auxiliary grid bins, and treating the soft foundation to complete the construction and installation of the integral revetment structure. Specifically, coarse sand construction in the backfill of the cylindrical structure is carried out, and soft foundation treatment is carried out; then, a geotextile reversed filter layer is arranged at the joint of the extending structure 52 between the two cylindrical structures, and coarse sand, gravel or concreting is backfilled in the auxiliary grid bin to finish the construction.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A construction method of a large-diameter steel-concrete combined cylindrical structure is characterized by comprising the following steps:
manufacturing a steel cylinder body and a dowel bar: manufacturing a steel cylinder body and a plurality of dowel bars according to the required size, wherein a notch is formed in the lower end part of each dowel bar, and the notch has a radian matched with the cylinder wall of the steel cylinder body; the height of the steel cylinder body is the designed vibration sinking depth;
installation of dowel steel and steel barrel: vertically inserting dowel bars to the upper end part of the cylinder wall of the steel cylinder body at intervals through the openings at the lower end part for fixing;
mounting a supporting structure: the supporting structure comprises a plurality of supporting rods which are transversely arranged, the number of the supporting rods in one supporting structure is the same as that of the force transmission rods, one end of each supporting rod is connected with the force transmission rod, and the other ends of the supporting rods are intersected and fixed on the central axis of the steel cylinder;
manufacturing and installing an annular replacing punch: determining the height of the annular counterattack according to the size of the vibration sinking tool, manufacturing the annular counterattack, and fixedly connecting the annular counterattack with the upper end part of the dowel bar to finish a first-stage assembly body of the large-diameter steel-concrete combined cylindrical structure;
and (3) vibration and sinking construction: transporting the first-stage assembly to a region to be hoisted, installing a vibration sinking tool, hoisting the first-stage assembly to an installation position, performing vibration sinking construction, stopping vibration sinking when the steel cylinder reaches a designed elevation, dismantling the vibration sinking tool, and further dismantling the annular counterattack and the supporting structure;
prefabricating a concrete cylinder: firstly, carrying out sectional design on the whole concrete cylinder, then carrying out sectional prefabrication on the concrete cylinder, and reserving a plurality of through holes for the dowel bars to penetrate in the cylinder wall of the concrete cylinder in the prefabrication process, wherein the positions of the through holes correspond to the positions of the dowel bars;
installation of the concrete cylinder: the concrete cylinders are sequentially installed, and the dowel bars penetrate through the through holes in the installation process, so that the concrete cylinders and the steel cylinders are integrated.
2. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 1, characterized in that: before the installation step of dowel steel and steel barrel, still include connection structure's preparation and installation: the connecting structure comprises a connecting plate and a shear plate, wherein a connecting hole is formed in the middle of the connecting plate, a dowel bar penetrates into the connecting hole, the lower surface of the connecting plate is flush with the top of the opening, the connecting plate is fixed to the outer surface of the dowel bar at the position, the shear plate is fixedly installed between the lower surface of the connecting plate and the dowel bar, and the number of the shear plates is more than or equal to 2.
3. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 2, characterized in that: after the notch at the lower end part of the dowel bar is inserted into the upper end part of the cylinder wall of the steel cylinder, the top end of the cylinder wall of the steel cylinder is contacted and fixed with the connecting plate; the upper surfaces of the connecting plates of all the connecting structures are on the same horizontal plane.
4. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 1, characterized in that: the dowel bar is a hollow steel pipe, and after the supporting structure is installed, concrete is poured into the dowel bar.
5. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 1, characterized in that: in the installation process of the annular replacing tie rod, the first flange plate is fixedly connected to the upper end of the dowel rod, the second flange plate is fixedly connected to the lower surface of the annular replacing tie rod, and the first flange plate and the second flange plate are fixedly connected through bolts, so that the connection of the annular replacing tie rod and the dowel rod is realized.
6. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 5, characterized in that: and reinforcing rib plates are arranged between the upper surface of the second flange plate and the annular stop buttons, and the number of the reinforcing rib plates is more than or equal to 2.
7. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 1, characterized in that: in the prefabricating process of the concrete cylinder, a tongue-and-groove structure is arranged at the joint of each section of the cylinder, and specifically comprises a convex part and a groove part which are arranged on two adjacent sections of the cylinder; in the installation process of the concrete cylinder, the protruding parts and the groove parts of the two adjacent sections of cylinders are butted and fixed.
8. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 1, characterized in that: the method also comprises the steps of preparing on site before the vibration sinking construction: and cleaning the site foundation of the area to be installed to enable the foundation environment to reach a basically flat condition.
9. The construction method of a large-diameter steel-concrete composite cylindrical structure according to claim 1, further comprising: according to construction requirements, arranging and installing a plurality of large-diameter steel-concrete combined cylindrical structures at corresponding positions; the concrete cylinder body of each large-diameter steel-concrete combined cylindrical structure extends outwards from the outer side to form an extending structure, the extending structure and the cylinder wall of the concrete cylinder body are integrally prefabricated and formed, and the extending structure between two adjacent cylindrical structures forms an auxiliary compartment.
10. The construction method of the large-diameter steel-concrete composite cylindrical structure according to claim 9, further comprising backfilling construction after arranging and installing the plurality of diameter steel-concrete composite cylindrical structures: and backfilling the cylindrical structure and the auxiliary grid bins, and treating the soft foundation to complete the construction and installation of the integral revetment structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210381215.7A CN114457750B (en) | 2022-04-13 | 2022-04-13 | Construction method of large-diameter steel-concrete combined cylindrical structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210381215.7A CN114457750B (en) | 2022-04-13 | 2022-04-13 | Construction method of large-diameter steel-concrete combined cylindrical structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114457750A true CN114457750A (en) | 2022-05-10 |
| CN114457750B CN114457750B (en) | 2022-06-28 |
Family
ID=81418631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210381215.7A Active CN114457750B (en) | 2022-04-13 | 2022-04-13 | Construction method of large-diameter steel-concrete combined cylindrical structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114457750B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094942A (en) * | 2022-06-30 | 2022-09-23 | 中国交通建设股份有限公司 | Large-diameter combined cylinder, deep water foundation, wind power foundation and static force sinking construction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120020742A1 (en) * | 2010-07-22 | 2012-01-26 | Mahmoud Mostafa H | Underwater Reinforced Concrete Silo for Oil Drilling and Production Applications |
| CN104005919A (en) * | 2014-06-13 | 2014-08-27 | 湖南大学 | Anchored ribbed type connecting device for prestressed concrete and steel tower section of wind power combined tower |
| CN106150924A (en) * | 2016-08-31 | 2016-11-23 | 山东中车同力钢构有限公司 | A kind of mixed steel tower and wind power generating set |
| CN209923921U (en) * | 2019-02-13 | 2020-01-10 | 北京市第三建筑工程有限公司 | Can splice formula steel protects a section of thick bamboo and supports |
| CN111648332A (en) * | 2020-06-01 | 2020-09-11 | 中交天津港湾工程研究院有限公司 | Rapidly-assembled artificial ecological island suitable for medium-sized open water area and construction method thereof |
| CN214460138U (en) * | 2021-02-23 | 2021-10-22 | 中交第一航务工程局有限公司 | Embedded large-diameter concrete cylindrical structure and cylindrical revetment structure |
-
2022
- 2022-04-13 CN CN202210381215.7A patent/CN114457750B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120020742A1 (en) * | 2010-07-22 | 2012-01-26 | Mahmoud Mostafa H | Underwater Reinforced Concrete Silo for Oil Drilling and Production Applications |
| CN104005919A (en) * | 2014-06-13 | 2014-08-27 | 湖南大学 | Anchored ribbed type connecting device for prestressed concrete and steel tower section of wind power combined tower |
| CN106150924A (en) * | 2016-08-31 | 2016-11-23 | 山东中车同力钢构有限公司 | A kind of mixed steel tower and wind power generating set |
| CN209923921U (en) * | 2019-02-13 | 2020-01-10 | 北京市第三建筑工程有限公司 | Can splice formula steel protects a section of thick bamboo and supports |
| CN111648332A (en) * | 2020-06-01 | 2020-09-11 | 中交天津港湾工程研究院有限公司 | Rapidly-assembled artificial ecological island suitable for medium-sized open water area and construction method thereof |
| CN214460138U (en) * | 2021-02-23 | 2021-10-22 | 中交第一航务工程局有限公司 | Embedded large-diameter concrete cylindrical structure and cylindrical revetment structure |
Non-Patent Citations (1)
| Title |
|---|
| 孔令磊等: "港珠澳大桥西人工岛钢圆筒及岛内回填砂成岛技术", 《水运工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094942A (en) * | 2022-06-30 | 2022-09-23 | 中国交通建设股份有限公司 | Large-diameter combined cylinder, deep water foundation, wind power foundation and static force sinking construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114457750B (en) | 2022-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213836667U (en) | Foundation pit engineering precast concrete non-primary support system | |
| CN114457750B (en) | Construction method of large-diameter steel-concrete combined cylindrical structure | |
| KR20160143599A (en) | Hybrid type concrete foundation of offshore wind turbine using composite of concrete and steel sleevee and fabrication method thereof | |
| CN112177012A (en) | Precast concrete non-primary support system with lattice columns for foundation pit engineering and construction method | |
| CN114045821A (en) | Combined connection type pile plate structure and construction method thereof | |
| CN110453715B (en) | Gas-liquid replaceable combined cylindrical jacket foundation structure and construction method thereof | |
| CN111305627B (en) | Concrete tank room construction method | |
| JP2017172295A (en) | Reinforcement structure and reinforcement method of existing steel sheet pile wall | |
| CN112779914A (en) | Inclined strut structure and construction method for combined support in foundation pit | |
| CN111022080A (en) | Connection structure of track beam and shield tunnel, construction method of connection structure and shield tunnel | |
| CN112376577A (en) | Subway station water-rich sand layer deep foundation pit construction supporting structure and construction method | |
| CN216713007U (en) | Combined connection type pile plate structure | |
| CN116378127A (en) | Method and device for reinforcing in-situ soil around offshore wind power single pile | |
| CN213836666U (en) | Precast concrete non-primary support system with lattice columns for foundation pit engineering | |
| CN114215092B (en) | Supporting plate overhead pile cap tie beam structure and construction method thereof | |
| CN216130114U (en) | High-bearing-capacity cast-in-place pile superposed column for reverse construction | |
| CN113047435B (en) | Cover-excavation top-down subway station beam column node structure and construction method | |
| JP5562715B2 (en) | Underwater foundation construction method and outer shell structure | |
| CN113136946B (en) | Self-supporting assembly type seawater sea sand concrete frame structure and construction method | |
| CN212153447U (en) | Assembled precast concrete retaining wall | |
| CN217480069U (en) | Large-diameter steel-concrete combined cylindrical structure | |
| KR100460457B1 (en) | Hollow Type I Beam Composite Deck having Longitudinal Joints and Constructing Method thereof | |
| CN219491009U (en) | Damping structure suitable for urban foundation pit support | |
| CN211692489U (en) | Connection structure of track beam and shield tunnel | |
| CN114592739B (en) | Semi-assembled ultra-deep superposed water storage tank and construction process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |