CN115613712A - Novel marine assembled node structure - Google Patents
Novel marine assembled node structure Download PDFInfo
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- CN115613712A CN115613712A CN202211190477.1A CN202211190477A CN115613712A CN 115613712 A CN115613712 A CN 115613712A CN 202211190477 A CN202211190477 A CN 202211190477A CN 115613712 A CN115613712 A CN 115613712A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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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 invention discloses a novel marine fabricated node structure, which comprises a plurality of pile foundations, wherein any pile foundation extends to the position below a mud surface; the precast beam is horizontally hung on the top of the pile foundation; the pile foundation is internally provided with a plurality of pile core steel sleeves coaxially, and the top of each pile core steel sleeve can be hung on the precast beam; any pile core steel sleeve is connected with the corresponding pile foundation by a grouting connecting part; and a plurality of concrete pile cores are formed in one pile core steel sleeve by pouring concrete. The invention solves the strength problem of the connecting node of the precast beam and the pile foundation, can be applied to projects with complex wave conditions or earthquakes, and leads the fabricated structure to be popularized in the water transportation and traffic industries.
Description
Technical Field
The invention relates to the technical field of constructional engineering. More particularly, the invention relates to a novel maritime work fabricated node structure.
Background
The fabricated structure has become the mainstream of the building industry due to the advantages of short construction period, cost saving, energy saving, environmental protection and the like, but the bottleneck of further development of the fabricated structure is restricted by taking the connecting node as a weak link of the fabricated structure. In the marine area, the structure of the water transport engineering bears large horizontal and vertical loads and bears cyclic loads such as waves and earthquakes at the same time under certain conditions, so that the internal force of the upper structure and the node of the lower pile foundation is complex, and a cast-in-place reinforced concrete structure is generally adopted to ensure the stress and integrity of the structure. With the development of the water transportation engineering to the open sea, large-scale offshore construction operation is inevitably needed, so that problems of construction risks, construction quality and the like to a certain extent are caused, and therefore, the application research of the prefabricated concrete structure connection node in the water transportation engineering is certainly a trend.
The connecting node of the traditional water transport engineering adopts a reinforced concrete structure, and a whole body is formed by casting a reserved steel bar in situ after the reserved steel bar extends into an upper structure. Because the node bending moment, shear force and axial force are great usually, and receive pile foundation size and protective layer restriction, pile core cross-section height is less, and pile core concrete arrangement of reinforcement is more, and it is comparatively violent to reserve reinforcing bar and superstructure reinforcing bar collision, relies on the scene to adjust by the people in the work progress more, and the field work volume is great. In addition, in order to adapt to the formation of plastic hinges of a pile head and an upper structure under the earthquake condition in a strong earthquake area, the reinforcement quantity needs to be increased in the traditional pile core concrete, and the complexity and the construction difficulty of a node structure are further increased. If the prefabricated concrete structure connecting node still adopts the pile core reinforced concrete structure then can't avoid upper portion prefabricated construction and the collision problem of pile core reservation reinforcing bar, cause the installation difficulty even unable installation. The grouting connection technology of the jacket and the lower pile foundation in ocean engineering is mature and applied, the problem of connection nodes of an upper steel structure and the pile foundation is perfectly solved, the technology can be further used for researching a pile core connection structure introduced into water transport engineering, but the integrity problem of an upper concrete precast beam and a 'jacket' pile core in water transport engineering is not yet mature in design method.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a novel marine fabricated node structure, which solves the strength problem of the connecting node of the precast beam and the pile foundation, can be applied to projects with complex wave conditions or earthquakes and can be popularized in the water transportation and traffic industries.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a novel maritime fabricated node structure, comprising:
any pile foundation is vertically arranged, and the lower end of the pile foundation extends to the position below a mud surface;
the prefabricated beam is horizontally arranged at the tops of the pile foundations, a plurality of preformed holes are formed in the prefabricated beam, one pile foundation is correspondingly provided with one preformed hole, any preformed hole and the corresponding pile foundation are coaxially arranged, the diameter of the preformed hole is larger than that of the pile foundation, a plurality of supporting steel bars are arranged on the inner wall of the preformed hole at intervals along the circumferential direction, and the bottom of any supporting steel bar is placed at the top of the pile foundation;
the pile foundation is internally and coaxially provided with a plurality of pile core steel sleeves, the outer diameter of any one pile core steel sleeve is smaller than the inner diameter of a circular ring structure formed by a plurality of supporting steel bars, and the top of each pile core steel sleeve extends into a corresponding reserved hole and can be hung on the precast beam; any pile core steel sleeve is connected with the corresponding pile foundation by a grouting connecting part;
and a plurality of concrete pile cores are formed in one pile core steel sleeve by pouring concrete.
Preferably, in the novel marine fabricated node structure, any one of the preformed holes is correspondingly provided with a first blind hole group, any one of the first blind hole groups comprises a plurality of first blind holes which are arranged on the top surface of the precast beam at intervals along the circumferential direction, the circle center of a circular structure formed by the plurality of first blind holes is located on the axis of the corresponding preformed hole, and any one of the first blind holes vertically extends downwards;
a plurality of connecting steel bars are arranged at the top of any pile core steel sleeve at intervals along the circumferential direction; a connecting steel bar is correspondingly arranged in one first blind hole, any connecting steel bar is of an inverted U-shaped structure, the free end of a first vertical edge of the connecting steel bar is fixedly connected with the pile core steel sleeve, and the free end of a second vertical edge can be inserted into the corresponding first blind hole.
Preferably, in the novel maritime work assembled node structure, the inner wall of any reserved hole is an uneven rough surface.
Preferably, the novel marine fabricated node structure is characterized in that a spiral shear key is arranged on the outer wall of any pile core steel sleeve and is positioned inside a pile foundation.
Preferably, the novel marine engineering fabricated node structure is characterized in that a bottom sealing steel plate is arranged at the bottom of any pile core steel sleeve, and the bottom sealing steel plate can seal the annular bottom surface formed by the bottom of the pile core steel sleeve, the outer wall of the pile core steel sleeve and the inner wall of the reserved hole.
Preferably, in the novel marine fabricated node structure, an elastic mechanism which can be abutted against the outer wall of the corresponding pile core steel sleeve is arranged in any reserved hole.
Preferably, in the novel marine fabricated node structure, any elastic mechanism comprises a plurality of spiral steel bars spaced along the circumferential direction, one end of any spiral steel bar is fixedly arranged on the inner wall of the reserved hole, and the other end of any spiral steel bar extends along the radial direction and is welded with the outer wall of the pile core steel sleeve.
Preferably, in the novel marine fabricated node structure, a plurality of second blind holes are circumferentially arranged on the inner wall of any one of the preformed holes at intervals, one first blind hole is correspondingly provided with one second blind hole, and any one second blind hole extends in the radial direction of the preformed hole and is communicated with the lower part of the corresponding first blind hole;
an elastic mechanism is correspondingly arranged in a second blind hole, and any elastic mechanism comprises:
the first movable rod is coaxially arranged in the first blind hole in a sliding manner along the vertical direction, and the bottom surface of the first movable rod is a wedge-shaped surface;
the first spring is sleeved outside the first movable rod, the upper end of the first spring is connected with the first movable rod, and the lower end of the first spring is connected with the inner wall of the first blind hole;
the second movable rod is coaxially arranged in the second blind hole in a sliding mode along the horizontal direction, one end of the second movable rod is located in the reserved hole, the other end of the second movable rod can extend into the second blind hole, and the end face of the other end of the second movable rod is a wedge-shaped face matched with the bottom face of the first movable rod; the top and the bottom of the second movable rod are respectively provided with a connecting rod, and any connecting rod is in sliding connection with the supporting steel bar along the radial direction of the preformed hole;
and the second spring is sleeved outside the second movable rod, one end of the second spring is connected with the connecting rod, and the other end of the second spring horizontally extends and is connected with the inner wall of the preformed hole.
Preferably, in the novel marine assembled node structure, one end of any second movable rod is provided with a sucker which can be adsorbed on the outer wall of the pile core steel sleeve.
The invention at least comprises the following beneficial effects:
1. the invention solves the strength problem of the connecting node of the precast beam and the pile foundation, can be applied to projects with complex wave conditions or earthquakes, and leads the fabricated structure to be popularized in the water transportation and traffic industries;
2. the pile core steel sleeve-concrete structure is adopted to replace the traditional pile core steel bar-concrete structure and is used as a connecting node of a pile foundation and a precast beam, and the method has the advantages of less concrete pouring amount on water, high construction efficiency, environmental protection, energy conservation and the like; furthermore, a circle of supporting steel bars which can be placed at the top of a pile foundation are arranged in each preformed hole of the precast beam, and the supporting steel bars are used as supporting structures after installation, so that the self-setting supporting structure of the precast beam is realized, the precast beam can be temporarily fixed without depending on a traditional hoop, the temporary hoop structure can be cancelled, the working procedures are reduced, the construction process is simplified, the risk of hoop erection is reduced, and the integrity of a node structure can be improved;
3. the inner wall of the preformed hole is designed into an uneven structure, so that the bonding strength of new and old concrete can be enhanced; the spiral shear key is arranged at the position, located in the pile foundation, of the pile core steel sleeve, so that the length of the pile core is reduced, and the structural strength of the pile core is ensured; the spiral shear key is welded on the outer wall of the pile core steel sleeve;
4. the bottom of the pile core steel sleeve is provided with a bottom sealing steel plate which is used as a bottom die of the grouting connecting part and the concrete pile core and can play an auxiliary role in positioning the pile core steel sleeve and the pile foundation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a novel marine fabricated node structure according to one embodiment of the present invention;
fig. 2 is a schematic structural diagram of a novel marine fabricated node structure according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a novel marine fabricated node structure according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a novel marine fabricated node structure according to another embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4;
fig. 6 is a schematic structural view of a pile foundation and a pile core steel sleeve in another technical scheme of the invention;
fig. 7 is a schematic structural view of an elastic mechanism, a pile foundation and a pile core steel sleeve in another technical scheme of the invention;
fig. 8 is a schematic structural view of an elastic mechanism, a pile foundation and a pile core steel sleeve in another technical scheme of the invention;
FIG. 9 is a schematic structural view of a sector plate and a compression bar according to another embodiment of the present invention;
FIG. 10 is a schematic structural view of a sector plate and a strut according to another embodiment of the present invention;
fig. 11 is a top view of four sector plates according to another embodiment of the present invention.
Description of reference numerals: 1-pile foundation; 2-prefabricating a beam; 21-preparing a hole; 22-supporting steel bars; 23-a first blind hole; 24-a second blind hole; 3-pile core steel sleeve; 31-connecting reinforcing steel bars; 32-shear key; 33-a through hole; 4-grouting the connecting part; 5-concrete pile core; 6-bottom sealing steel plate; 61-sector plates; 62-a pressure bar; 7-spiral reinforcing steel bars; 81-a first movable bar; 82-a first spring; 83-a second movable bar; 84-a connecting rod; 85-a second spring; 86-a suction cup; 9-cast-in-place beam.
Detailed Description
The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified.
In the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 5, the present invention provides a novel marine fabricated node structure, which includes:
any pile foundation 1 is vertically arranged, and the lower end of the pile foundation 1 extends to the position below a mud surface;
the precast beam 2 is horizontally arranged at the tops of the pile foundations 1, a plurality of preformed holes 21 are formed in the precast beam 2, one pile foundation 1 is correspondingly provided with one preformed hole 21, any preformed hole 21 and the corresponding pile foundation 1 are coaxially arranged, the diameter of each preformed hole 21 is larger than that of the pile foundation 1, a plurality of supporting steel bars 22 are arranged on the inner wall of each preformed hole 21 at intervals along the circumferential direction, and the bottom of any supporting steel bar 22 is placed at the top of the pile foundation 1;
the pile comprises a plurality of pile core steel sleeves 3, wherein one pile foundation 1 is internally and coaxially provided with one pile core steel sleeve 3, the outer diameter of any one pile core steel sleeve 3 is smaller than the inner diameter of a circular ring structure formed by a plurality of supporting steel bars 22, and the top of the pile core steel sleeve 3 extends into a corresponding reserved hole 21 and can be hung on the precast beam 2; any pile core steel sleeve 3 is connected with the corresponding pile foundation 1 by adopting a grouting connecting part 4; the pile core steel sleeve meets the internal force requirement of a connection node of the precast beam and the pile foundation, the top of the pile core steel sleeve extends into the reserved hole and can be hung on the precast beam, the bottom of the pile core steel sleeve extends into the pile foundation to a certain depth, then high-strength slurry is poured in an annular region between the pile core steel sleeve and the pile foundation to form a grouting connection part, the pile core steel sleeve is connected with the pile foundation, the top of the pile core steel sleeve is connected with the precast beam, the precast beam is integrally connected with the pile foundations, and the integrity of the node structure is improved;
a plurality of concrete pile cores 5 are formed in one pile core steel sleeve 3 through concrete pouring, and one concrete pile core 5 is formed.
In the technical scheme, the invention provides a novel marine fabricated node structure, which adopts a pile core steel sleeve-concrete structure to replace a traditional pile core steel bar-concrete structure as a connecting node of a pile foundation and a precast beam, and has the advantages of less concrete pouring amount on water, high construction efficiency, environmental protection, energy conservation and the like; furthermore, a circle of supporting steel bars which can be placed at the top of the pile foundation are arranged in each preformed hole of the precast beam, and the supporting steel bars are used as supporting structures after installation, so that the self-supporting structure of the precast beam is realized, the precast beam can be temporarily fixed without depending on the traditional hoop, the temporary hoop structure can be eliminated, the processes are reduced, the construction process is simplified, the risk of hoop erection is reduced, and the integrity of the node structure can be improved;
in another technical scheme, in the novel marine fabricated node structure, a first blind hole group is correspondingly arranged in any one of the preformed holes 21, any one of the first blind hole groups comprises a plurality of first blind holes 23 which are arranged on the top surface of the precast beam 2 at intervals along the circumferential direction, the circle center of a circular structure formed by the plurality of first blind holes 23 is located on the axis of the corresponding preformed hole 21, and any one of the first blind holes 23 extends vertically and downwardly;
a plurality of connecting steel bars 31 are arranged at the top of any pile core steel sleeve 3 at intervals along the circumferential direction; one first blind hole 23 is correspondingly provided with one connecting steel bar 31, any connecting steel bar 31 is of an inverted U-shaped structure, the free end of a first vertical edge of the connecting steel bar 31 is fixedly connected with the pile core steel sleeve 3, and the free end of a second vertical edge can be inserted into the corresponding first blind hole 23.
In the technical scheme, a circle of first blind holes are formed in the periphery of the preformed hole, a circle of connecting steel bars are arranged on the top of the pile core steel sleeve in a surrounding mode, one connecting steel bar is correspondingly arranged in one first blind hole, each connecting steel bar is of an inverted U-shaped structure, as shown in fig. 2, the other ends of the connecting steel bars can be inserted into the corresponding first blind holes, and the top of the pile core steel sleeve and the top of the precast beam are hung;
connecting reinforcement's one end and the welding of stake core steel casing, in the other end inserts first blind hole, the cooperation supporting reinforcement for the temporary fixation of precast beam provides more effectual support, still can improve simultaneously precast beam and stake core steel casing, with the firm in connection nature and the wholeness of pile foundation.
According to the technical scheme, the concept of mortise and tenon is adopted, the connecting steel bars are uniformly welded on the inner wall of the top of the pile core steel sleeve, and the other ends of the connecting steel bars are matched with the first blind holes, so that the other ends of the connecting steel bars can extend into the precast beam, the integral prefabrication and integral hoisting are realized, the installation procedures are reduced, and the installation of the pile core structure and the installation of the precast beam are in place at one time; on the other hand, the installation and the positioning can be convenient, and the quick installation is realized. Wherein consider pile foundation construction deviation and roof beam prefabrication deviation, pile core steel casing reserved steel bar design is the U-shaped, and overhanging spiral reinforcing bar is connected with the pile core steel construction in the precast beam preformed hole, can adjust according to the off normal in the installation at any time, satisfies installation requirement and pile foundation and the minimum grout thickness requirement of pile core steel construction.
According to the invention, the pile core steel sleeve with the top extending into the preformed hole of the precast beam is coaxially inserted into the pile foundation, and the grouting connection part is further matched, so that the precast beam and the pile foundation are connected into a whole, and the integrity of the precast beam and the pile foundation and the strength of a connection node are improved; the pile core steel sleeve is adopted to replace conventional steel bars, so that the number of the steel bars at the node is greatly reduced, the probability of steel bar collision is reduced, the concrete pile core is convenient to pour and vibrate in the pouring process, and the installation is convenient; at inside concrete pile core that forms of pile core steel casing through concreting, the pile core of concrete structure receives the restraint of steel pipe, has strengthened the ductility of concrete, and the ductility of steel casing itself is superior to the ductility of traditional reinforcing bar in addition, and then makes precast beam and the connected node of pile foundation have more excellent ductility, better forms "plasticity hinge", increases the security of node structure.
In another technical scheme, in the novel marine assembled node structure, the inner wall of any preformed hole 21 is an uneven rough surface. The inner wall of the preformed hole is of an uneven structure, so that the bonding strength of new and old concrete (the poured concrete pile core is the new concrete, and the precast beam is the old concrete) can be enhanced.
In another technical scheme, in the novel marine fabricated node structure, a spiral shear key 32 is arranged on the outer wall of any pile core steel sleeve 3 and is located inside the pile foundation 1. The spiral shear key is arranged at the position, located in the pile foundation, of the pile core steel sleeve, so that the length of the pile core is reduced, and meanwhile, the structural strength of the pile core is guaranteed. The spiral shear key is welded on the outer wall of the pile core steel sleeve.
In another technical scheme, in the novel marine assembled node structure, the bottom of any pile core steel sleeve 3 is provided with a bottom sealing steel plate 6, and the bottom of the pile core steel sleeve 3, the outer wall of the pile core steel sleeve 3 and the annular bottom surface formed by the inner wall of the reserved hole 21 can be sealed. The bottom of the pile core steel sleeve is provided with a bottom sealing steel plate which is used as a bottom die of the grouting connecting part and the concrete pile core and can play an auxiliary role in positioning the pile core steel sleeve and the pile foundation. The bottom sealing steel plate can be a circular horizontal steel plate and is directly welded at the bottom of the pile core steel sleeve.
According to the invention, through the matching design of the supporting steel bars, the connecting steel bars and the bottom sealing steel plates, the prefabricated beam is provided with installation positioning assistance to realize vertical and horizontal 3D positioning, in the vertical direction, the overhanging supporting steel bars 11 are reserved at the bottom in the reserved hole of the prefabricated beam to serve as a supporting structure of the prefabricated beam 1 during installation, meanwhile, the depth of the pile core steel sleeve 4 extending into a pile foundation can be positioned, in the horizontal direction, the other ends of the connecting steel bars are inserted into corresponding first blind holes, the clear distance between the pile core steel sleeve and the reserved holes can be preliminarily adjusted, and further, the bottom sealing steel plates are arranged at the bottom of the pile core steel sleeve and serve as positioning assistance of the pile core steel sleeve and the clear distance between the pile foundations while serving as a grouting bottom mould.
Direct bottom weld back cover steel sheet at pile core steel casing's bottom among the above-mentioned technical scheme, if the diameter of back cover steel sheet equals with the pile foundation inner wall, when the installation construction, when pile core steel casing is vertical to be inserted the pile foundation downwards inside, there is the condition that back cover steel sheet circumferential edge can scrape the pile foundation inner wall, the transfer degree of difficulty of pile core steel casing has been increased, still can scratch the inner wall of pile foundation, if the diameter of back cover steel sheet is less than the pile foundation inner wall, back cover steel sheet and pile foundation directly have the annular gap, thick liquids can flow from this annular gap, lead to the back cover steel sheet not good to the shutoff effect of grout connecting portion.
Based on the technical defects of the back cover steel plate of the analysis, which exist in the fixed structure, the technical scheme can further comprise the following technical details so as to better realize the technical effects:
a compression bar 62 is coaxially arranged inside any one pile core steel sleeve 3 and is in sliding connection with the inner wall of the pile core steel sleeve 3 along the vertical direction, as shown in fig. 6, two pairs of arc-shaped through holes 33 are arranged on the circumferential side wall of the pile core steel sleeve 3 at intervals along the vertical direction, any one pair of arc-shaped through holes 33 comprises two symmetrically arranged arc-shaped through holes 33, and the vertical downward projection of the four arc-shaped through holes 33 forms a closed circle;
any bottom sealing steel plate 6 comprises two pairs of sector plates 61 arranged at intervals in the vertical direction, any one pair of sector plates 61 comprises two symmetrically arranged sector plates 61, one arc-shaped through hole 33 is correspondingly provided with one sector plate 61, as shown in fig. 10 to 11, one end of any sector plate 61 is hinged with the outer wall of a compression bar 62, the other end of the sector plate 61 penetrates through the corresponding arc-shaped through hole 33 to extend out of the pile core steel sleeve 3, when the compression bar 62 moves downwards to a limit position, the projections of any two adjacent sector plates 61 in the vertical direction are superposed, a circular ring structure formed by the vertical downward projections of the four sector plates 61 is matched with a circular ring structure formed by the compression bar 62 and the inner wall of a reserved hole 21, namely, the inner circular edge of the sector plate 61 is in sealing contact with the outer wall of the compression bar 62, the outer circular edge is in sealing contact with the inner wall of the reserved hole 21, and the four sector plates 61 completely block the circular ring structure formed by the reserved hole 21 and the compression bar 62.
Preferably, a sleeve (the bottom of the pressure rod is the sleeve and is not marked in fig. 7) is coaxially sleeved at the bottom of the pressure rod and is connected with a steel sleeve of the pile core, the pressure rod is in sliding connection with the sleeve along the vertical direction, an elastic bulge is arranged on the outer wall of the pressure rod, and a clamping groove corresponding to the bulge is arranged on the inner wall of the sleeve;
preferably, the inner circle of the sector plate is provided with a downward inclined surface inclining from the circle center to the circumferential edge;
according to the technical scheme, the back cover steel plate is arranged into the four fan-shaped plate structures with adjustable opening and closing degrees, and the annular area between the bottom of the pile core steel sleeve and the pile foundation can be sealed and plugged, so that the back cover steel plate can be used as a grouting connecting part and a concrete pile core bottom die and cannot scratch the inner wall of the pile foundation when the pile core steel sleeve is lowered, meanwhile, the back cover steel plate can also adjust the horizontal position of the pile core steel sleeve, the pile core steel sleeve is ensured to be coaxial with the pile foundation, and further the thickness of the grouting connecting part formed by grouting is ensured to be more uniform.
Before the pile core steel sleeve is hoisted in place, the compression rod is positioned at the upper limit position, the protrusion on the compression rod is positioned above the clamping groove at the moment, the protrusion and the clamping groove are not interfered with each other, the four sector plates are in a downward inclined state (as shown in figures 7 and 9), the edges of the four sector plates are not contacted with the inner wall of the pile foundation, and the situation that the edges of the sector plates scratch the inner wall of the pile foundation when the pile core steel sleeve is hoisted downwards can be avoided; after the pile core steel sleeve is hoisted in place, the pressure rod is vertically pressed downwards to the limit position, the bulge on the pressure rod is just clamped in the clamping groove, at the moment, the four sector plates rotate to the horizontal position, the vertical downward projection of the four sector plates just forms a closed circular structure (shown in figures 8 and 9), the outer diameter of the circular structure is equal to the inner diameter of the pile foundation, and the inner diameter of the circular structure is equal to the diameter of the pressure rod, namely the four sector plates block the bottom of the pile core steel sleeve to form a bottom die of the concrete pile core, and the bottom of the circular structure formed by the pile core steel sleeve and the pile foundation can also be blocked to form a bottom die of the grouting connecting part;
the interior circle middle part of sector plate is passed through the articulated elements and is articulated with the depression bar, the structural design on inclined plane, can guarantee that the relative depression bar of sector plate rotates (as shown in figure 9, during the depression bar upper limit position, sector plate tilt state and with the angle of depression bar be 45, during the depression bar lower limit position, sector plate horizontality and with the angle of depression bar be 90 degrees, can guarantee again simultaneously that the sector plate rotates when to the horizontality, the top of sector plate can with the periphery sealing contact of depression bar, improve the shutoff effect to the grout.
In another technical scheme, in the novel marine fabricated node structure, an elastic mechanism which can be abutted against the outer wall of the corresponding pile core steel sleeve 3 is arranged in any reserved hole 21. The elastic mechanism is arranged to further enhance the connection firmness of the precast beam and the pile core steel sleeve and the integrity of the connection node.
In another technical scheme, in the novel marine assembled node structure, any elastic mechanism comprises a plurality of spiral steel bars 7 spaced along the circumferential direction, one end of any spiral steel bar 7 is fixedly arranged on the inner wall of the preformed hole 21, and the other end of any spiral steel bar 7 extends along the radial direction and is welded with the outer wall of the pile core steel sleeve 3. The spiral reinforcing steel bar has certain elasticity modulus, and the one end of spiral reinforcing steel bar is located the pore wall of preformed hole, and the other end welds with the outer wall of pile core steel casing, during concrete construction, can put in place and the top is hung and is located after on the precast beam, carries out the welding of the other end and the pile core steel casing of spiral reinforcing steel bar (artifical tensile spiral reinforcing steel bar makes its other end and the outer wall contact of pile core steel casing).
In another technical scheme, in the novel marine fabricated node structure, a plurality of second blind holes 24 are circumferentially arranged on the inner wall of any one of the preformed holes 21 at intervals, one first blind hole 23 is correspondingly provided with one second blind hole 24, and any one of the second blind holes 24 extends along the radial direction of the preformed hole 21 and is communicated with the lower part of the corresponding first blind hole 23;
a second blind hole 24 is correspondingly provided with an elastic mechanism, and any elastic mechanism comprises:
the first movable rod 81 is coaxially and slidably arranged in the first blind hole 23 along the vertical direction, and the bottom surface of the first movable rod 81 is a wedge-shaped surface;
the first spring 82 is sleeved outside the first movable rod 81, the upper end of the first spring 82 is connected with the first movable rod 81, and the lower end of the first spring 82 is connected with the inner wall of the first blind hole 23;
the second movable rod 83 is coaxially and horizontally arranged in the second blind hole 24 in a sliding manner, one end of the second movable rod 83 is located in the preformed hole 21, the other end of the second movable rod can extend into the second blind hole 24, and the end face of the other end of the second movable rod 83 is a wedge-shaped face matched with the bottom face of the first movable rod 81; the top and the bottom of the second movable rod 83 are respectively provided with a connecting rod 84, and any connecting rod 84 is connected with the support steel bar 22 in a sliding manner along the radial direction of the preformed hole 21;
and a second spring 85 sleeved outside the second movable rod 83, wherein one end of the second spring 85 is connected with the connecting rod 84, and the other end extends horizontally and is connected with the inner wall of the preformed hole 21.
In the technical scheme, the elastic mechanism started by the connecting steel bars is arranged in each preformed hole, so that the automatic connection of the elastic mechanism and the pile core steel sleeve is realized, manual connection or welding is not needed, time and labor are saved, the elastic mechanism can be self-locked under the pressing action of the connecting steel bars, the connection firmness of the elastic mechanism and the pile core steel sleeve is ensured, the connection firmness and the integrity of the precast beam, the pile core steel sleeve and the pile foundation are further improved, and the firmness and the integrity of the connection node structure are improved; further, any elastic mechanism can adjust the horizontal position of the corresponding pile core steel sleeve to ensure that the pile core steel sleeve is coaxial with the reserved hole,
the inner wall of the preformed hole is provided with a plurality of second blind holes which are in one-to-one correspondence with the first blind holes, any first blind hole and the corresponding second blind hole form an L-shaped structure, a first movable rod is elastically arranged in the first blind hole and is in sliding connection with the hole wall of the first blind hole along the vertical direction, the upper part of the first blind hole can accommodate a space for connecting the other end of the steel bar, a second movable rod is elastically and movably arranged in the second blind hole, and the second movable rod is in sliding connection with the hole wall of the second blind hole along the horizontal direction (the radial direction of the preformed hole);
before the other end of the connecting steel bar is inserted into the first blind hole, the first spring and the second spring are in a natural extension state, the first movable rod is located at the upper limit position and located above the second blind hole, one end of the second movable rod is the largest distance away from the axis of the reserved hole (the diameter of a circular structure formed by the end parts of one ends of all the second movable rods is larger than that of the pile core steel sleeve and larger than that of a circular structure formed by vertically downward projecting a plurality of fan-shaped plates in an inspiration state, so that the second movable rods cannot influence the downward placement of the pile core steel sleeve), the other end of the second movable rod is located in the first blind hole, and the vertically downward projecting parts of the first movable rod and the second movable rod are overlapped; when the other end of connecting reinforcement is vertical when inserting first blind hole downwards, the tip of the other end of connecting reinforcement exerts decurrent driving force to first movable rod, make the vertical downstream of first movable rod, first spring is compressed, promote the second movable rod towards the direction horizontal migration who is close to the axis of preformed hole in the time of the vertical downstream of first movable rod, the second spring is compressed, after target in place in inserting first blind hole when the other end of connecting reinforcement, first movable rod downstream to extreme position, second movable rod horizontal migration to extreme position, the tip of the one end of all second movable rods and the outer wall butt of stake core steel casing.
In another technical scheme, in the novel marine assembled node structure, one end of any second movable rod is provided with a sucker 86 which can be adsorbed on the outer wall of the pile core steel sleeve 3. The setting can adsorb the sucking disc on pile core steel casing outer wall, and a plurality of second movable rods accessible sucking disc are firmly connected with pile core steel casing, and then improve the fastness and the wholeness that pile core steel casing and precast beam are connected to reach the fastness and the wholeness that improve whole connected node structure. When the other end at connecting reinforcement did not insert first blind hole in, first spring and second spring are the natural extension state, first movable rod is located the upper limit position, the other end of second movable rod extends to in the first blind hole, the diameter of the circular structure that a plurality of sucking discs formed is greater than the diameter of stake core steel casing, and be greater than the depression bar when being located the upper limit position (a plurality of sector plates are located under the horizontality), the diameter of the confined circular structure that the vertical decurrent projection of a plurality of sector plates formed, before (before the other end of connecting reinforcement inserts first blind hole and targets in place) a plurality of sucking discs do not influence stake core steel casing promptly transferring to the place, a plurality of sector plates are vertical to pass the preformed hole downwards and insert inside.
The installation and construction process of the invention is as follows:
the steps 1 and 2 can also be replaced, the pile core steel sleeve and the precast beam are assembled in advance, and then the pile core steel sleeve and the precast beam are integrally hoisted to a construction site and are placed to the top of the pile foundation; the method comprises the following steps that pile core steel sleeves and precast beams can be integrally precast and hoisted, one pile core steel sleeve is inserted into each reserved hole of the precast beam, the top of each pile core steel sleeve is hung on the precast beam through a plurality of connecting steel bars, each connecting steel bar is inserted into a first blind hole, a second movable rod is pushed out and is firmly adsorbed on the pile core steel sleeves through a sucker, then the precast beam and the pile core steel sleeves which are integrally pre-assembled are integrally hoisted to the top of a pile foundation, in the hoisting process, each pile core steel sleeve is ensured to be vertically and downwards inserted into the corresponding pile foundation, and a circle of supporting steel bars arranged inside each reserved hole are placed on the annular top surface of the corresponding pile foundation;
step 4, performing high-strength grouting on an annular region between any pile core steel sleeve and the corresponding pile foundation to form a grouting connecting part, and further connecting the pile core steel sleeve with the inner wall of the pile foundation;
step 5, pouring concrete into the steel sleeve of each pile core to form a concrete pile core;
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not intended to be limited to the details shown, described and illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed, and to such extent that such modifications are readily available to those skilled in the art, and it is not intended to be limited to the details shown and described herein without departing from the general concept as defined by the appended claims and their equivalents.
Claims (9)
1. Novel marine worker assembled node structure, its characterized in that includes:
any pile foundation is vertically arranged, and the lower end of the pile foundation extends below a mud surface;
the prefabricated beam is horizontally arranged at the tops of the pile foundations, a plurality of preformed holes are formed in the prefabricated beam, one pile foundation is correspondingly provided with one preformed hole, any preformed hole and the corresponding pile foundation are coaxially arranged, the diameter of the preformed hole is larger than that of the pile foundation, a plurality of supporting steel bars are arranged on the inner wall of each preformed hole at intervals along the circumferential direction, and the bottom of any supporting steel bar is placed at the top of the pile foundation;
the pile foundation is internally and coaxially provided with a plurality of pile core steel sleeves, the outer diameter of any one pile core steel sleeve is smaller than the inner diameter of a circular ring structure formed by a plurality of supporting steel bars, and the top of each pile core steel sleeve extends into a corresponding reserved hole and can be hung on the precast beam; any pile core steel sleeve is connected with the corresponding pile foundation by a grouting connecting part;
and a plurality of concrete pile cores are formed in one pile core steel sleeve by pouring concrete.
2. The novel maritime work fabricated node structure as claimed in claim 1, wherein any one of the prepared holes is provided with a first blind hole group correspondingly, any one of the first blind hole groups comprises a plurality of first blind holes which are arranged on the top surface of the precast beam at intervals along the circumferential direction, the circle center of a circular structure formed by the plurality of first blind holes is located on the axis of the corresponding prepared hole, and any one of the first blind holes extends vertically downwards;
a plurality of connecting steel bars are arranged at the top of any pile core steel sleeve at intervals along the circumferential direction; a connecting steel bar is correspondingly arranged in one first blind hole, any connecting steel bar is of an inverted U-shaped structure, the free end of a first vertical edge of the connecting steel bar is fixedly connected with the pile core steel sleeve, and the free end of a second vertical edge can be inserted into the corresponding first blind hole.
3. The novel maritime fabricated node structure of claim 1, wherein the inner wall of any one of the prepared holes is an uneven rough surface.
4. The novel marine fabricated node structure of claim 1, wherein the outer wall of the steel sleeve of any one of the pile cores is provided with a spiral shear key, which is located inside the pile foundation.
5. The structure of the novel maritime work fabricated node as claimed in claim 1, wherein the bottom of any pile core steel casing is provided with a bottom sealing steel plate which can seal off the bottom of the pile core steel casing, the annular bottom surface formed by the outer wall of the pile core steel casing and the inner wall of the reserved hole.
6. The novel maritime work assembled node structure as claimed in claim 1, wherein any one of the prepared holes is provided with an elastic mechanism capable of abutting against the outer wall of the corresponding pile core steel sleeve.
7. The marine fabricated node structure of claim 6, wherein the resilient means comprises a plurality of circumferentially spaced spiral bars, one end of each spiral bar being fixed to the inner wall of the prepared hole and the other end extending radially and being welded to the outer wall of the pile core steel sleeve.
8. The novel maritime work fabricated node structure of claim 6, wherein a plurality of second blind holes are circumferentially arranged at intervals on the inner wall of any one of the prepared holes, one second blind hole is correspondingly arranged on one first blind hole, and any one second blind hole extends in the radial direction of the prepared hole and is communicated with the lower part of the corresponding first blind hole;
a second blind hole corresponds sets up an elastic mechanism, and arbitrary elastic mechanism includes:
the first movable rod is coaxially arranged in the first blind hole in a sliding manner along the vertical direction, and the bottom surface of the first movable rod is a wedge-shaped surface;
the first spring is sleeved outside the first movable rod, the upper end of the first spring is connected with the first movable rod, and the lower end of the first spring is connected with the inner wall of the first blind hole;
the second movable rod is coaxially arranged in the second blind hole in a sliding mode along the horizontal direction, one end of the second movable rod is located in the reserved hole, the other end of the second movable rod can extend into the second blind hole, and the end face of the other end of the second movable rod is a wedge-shaped face matched with the bottom face of the first movable rod; the top and the bottom of the second movable rod are respectively provided with a connecting rod, and any connecting rod is connected with the support steel bar in a sliding manner along the radial direction of the preformed hole;
and the second spring is sleeved outside the second movable rod, one end of the second spring is connected with the connecting rod, and the other end of the second spring horizontally extends and is connected with the inner wall of the preformed hole.
9. The novel maritime fabricated node structure of claim 8, wherein one end of any one of the second movable rods is provided with a suction cup which can be adsorbed on the outer wall of the pile core steel sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211190477.1A CN115613712B (en) | 2022-09-28 | 2022-09-28 | Novel marine assembled node structure |
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| CN202211190477.1A CN115613712B (en) | 2022-09-28 | 2022-09-28 | Novel marine assembled node structure |
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| CN115613712B CN115613712B (en) | 2023-05-30 |
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| CN103696418A (en) * | 2013-12-12 | 2014-04-02 | 湖北中南勘察基础工程有限公司 | Anti-floating method and device for bored concrete pile reinforcement cage |
| CN105345926A (en) * | 2015-09-25 | 2016-02-24 | 安徽水利开发股份有限公司 | Prefabricated construction method for prestressed concrete box girder |
| CN107558617A (en) * | 2017-10-23 | 2018-01-09 | 上海市城市建设设计研究总院（集团）有限公司 | Prefabricated beam-column node structure and its construction method in contrary sequence method foundation ditch |
| JP6647721B1 (en) * | 2019-04-19 | 2020-02-14 | 黒沢建設株式会社 | Tensionless PC steel bar concrete beam-column structure |
| CN216688979U (en) * | 2021-12-09 | 2022-06-07 | 淮安市水利勘测设计研究院有限公司 | Novel assembled landing stage structure |
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2022
- 2022-09-28 CN CN202211190477.1A patent/CN115613712B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696418A (en) * | 2013-12-12 | 2014-04-02 | 湖北中南勘察基础工程有限公司 | Anti-floating method and device for bored concrete pile reinforcement cage |
| CN105345926A (en) * | 2015-09-25 | 2016-02-24 | 安徽水利开发股份有限公司 | Prefabricated construction method for prestressed concrete box girder |
| CN107558617A (en) * | 2017-10-23 | 2018-01-09 | 上海市城市建设设计研究总院（集团）有限公司 | Prefabricated beam-column node structure and its construction method in contrary sequence method foundation ditch |
| JP6647721B1 (en) * | 2019-04-19 | 2020-02-14 | 黒沢建設株式会社 | Tensionless PC steel bar concrete beam-column structure |
| CN216688979U (en) * | 2021-12-09 | 2022-06-07 | 淮安市水利勘测设计研究院有限公司 | Novel assembled landing stage structure |
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| CN115613712B (en) | 2023-05-30 |
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