CN113502807B - Slow-setting prestressed cast-in-place pile reinforcement cage structure and segmented construction method thereof - Google Patents
Slow-setting prestressed cast-in-place pile reinforcement cage structure and segmented construction method thereof Download PDFInfo
- Publication number
- CN113502807B CN113502807B CN202110661748.6A CN202110661748A CN113502807B CN 113502807 B CN113502807 B CN 113502807B CN 202110661748 A CN202110661748 A CN 202110661748A CN 113502807 B CN113502807 B CN 113502807B
- Authority
- CN
- China
- Prior art keywords
- reinforcement cage
- section
- prestressed
- slow
- setting
- 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.)
- Active
Links
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
-
- 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
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a retarded coagulation prestressed cast-in-place pile reinforcement cage structure and a sectional construction method thereof, aiming at providing the retarded coagulation prestressed cast-in-place pile reinforcement cage structure and the sectional construction method thereof, which can simplify the construction process, facilitate the construction and save the labor and time cost under the condition of not influencing the bearing capacity of the cast-in-place pile structure. The reinforcement cage structure of the slow-setting prestressed cast-in-place pile comprises a reinforcement cage assembly, wherein the reinforcement cage assembly comprises a plurality of sections of reinforcement cages which are sequentially distributed from bottom to top, and any two adjacent sections of reinforcement cages are connected; the slow-setting prestressed tendons comprise inner lower-section prestressed tendons, outer middle-section prestressed tendons and inner upper-section prestressed tendons which are sequentially distributed from bottom to top, wherein the inner lower-section prestressed tendons are positioned in a section of steel bar cage at the middle part or the lower part of the steel bar cage assembly; the outer middle section prestressed tendon is positioned at the outer side of the steel bar cage assembly; the inner upper-section prestressed tendon is positioned at the inner side of the reinforcement cage assembly.
Description
Technical Field
The invention relates to a bored concrete pile reinforcement cage structure, in particular to a retarded coagulation prestressed bored concrete pile reinforcement cage structure and a sectional construction method thereof.
Background
Along with the continuous development of urban construction, the development scale of underground space is continuously enlarged, more and more multilayer basement projects are provided, the foundation is buried deeper and deeper, and the application of the uplift cast-in-place pile is very wide. Based on the requirement of durability design, the reinforcing bars of uplift piles are often controlled by cracks of pile bodies, common cast-in-place piles are easy to crack when being pulled, delayed coagulation prestressed cast-in-place piles do not crack by applying prestress, and the uplift pile has the characteristics of high durability, good economical efficiency and the like and is gradually popularized.
The existing slow-setting prestressed cast-in-place pile steel reinforcement cage structure generally comprises non-prestressed tendons, slow-setting prestressed tendons and spiral stirrups. The slow-setting prestressed cast-in-place pile generally adopts the following two construction modes,
firstly, a one-step forming construction mode is adopted, specifically, a reinforcement cage is formed in one step, the reinforcement cage of the cast-in-place pile and a prestressed steel strand are directly bound into a whole, large-scale hoisting equipment is used for hoisting and placing, and concrete is poured; the construction mode has higher requirements on fields, operation surfaces and hoisting equipment, has larger limitation, is difficult to be applied to conventional projects, and is not favorable for popularization and practical use of the slow-setting prestressed cast-in-place pile.
Secondly, a construction mode is manufactured in a segmented mode, specifically, the reinforcement cages are manufactured in a segmented mode according to field hoisting equipment and field conditions, the reinforcement cages are hoisted section by section and are placed into the pile holes, two adjacent sections of reinforcement cages are welded and connected with non-prestressed framework reinforcements and stirrups of the reinforcement cages at the hole openings of the pile holes, and finally concrete is poured; the construction method has the following defects that the length of the prestressed cast-in-place pile is generally between 20m and 80m, the length of the prestressed steel strand is long (the prestressed steel strand cannot be lapped, and the length still is the length of the whole pile), and the prestressed steel strand has high rigidity and is difficult to bend, so that in the actual construction process (the process of hoisting the steel reinforcement cage section by section and putting the steel reinforcement cage into a pile hole), dozens of meters of steel strands cannot be sequentially penetrated into the finished steel reinforcement cage, and the structural form of 'closed hooping outside and prestressed steel strand inside' cannot be formed; therefore, the following two conditions often occur in the current sectional manufacturing construction mode, in one condition, the prestressed steel strands are arranged on the outer side of the reinforcement cage, so that although the construction is convenient, the prestressed steel strands are arranged on the outer side of the reinforcement cage, the bearing capacity of the reinforcement cage structure of the delayed coagulation prestressed cast-in-place pile can be greatly influenced, and the bearing capacity of the cast-in-place pile structure is reduced; in another kind of condition, for making the prestressing steel strand wires can be in the steel reinforcement cage inboard, adopt at the drill way position of stake hole on-the-spot ligature, preparation steel reinforcement cage, place prestressing steel strand wires in the steel reinforcement cage, so, though can make prestressing steel strand wires can be in the stirrup inboard, its construction procedure is complicated, and the engineering time greatly prolongs, can make the stake hole appear vacant for a long time, increases the hole risk of collapsing, also will reduce rig efficiency by a wide margin, consume a large amount of manpowers and time cost.
Disclosure of Invention
The invention aims to overcome the defects existing in the sectional manufacturing construction mode of the slow-setting prestressed cast-in-place pile in the prior art, in order to facilitate construction, the prestressed steel strands are arranged on the outer side of the reinforcement cage, so that the bearing capacity of the reinforcement cage structure of the slow-setting prestressed cast-in-place pile is influenced, thereby reducing the bearing capacity of the cast-in-place pile structure, and in order to enable the prestressed steel strands to be positioned at the inner side of the reinforcement cage so as to improve the bearing capacity of the cast-in-place pile structure, the problems that the construction process is complicated, the construction time is greatly prolonged, the pile hole is left vacant for a long time, the risk of hole collapse is increased, and a large amount of labor and time cost are consumed are solved, the method can solve the problems that the bearing capacity of a cast-in-place pile structure is not influenced, the construction process is simplified, the construction is convenient, and the labor and time costs are saved.
The technical scheme of the invention is as follows:
a slow setting prestressed filling pile steel reinforcement cage structure, includes:
the steel reinforcement cage assembly comprises a plurality of steel reinforcement cages which are sequentially distributed from bottom to top, and any two adjacent steel reinforcement cages are connected;
the slow-setting prestressed tendon comprises an inner lower segment prestressed tendon, an outer middle segment prestressed tendon and an inner upper segment prestressed tendon which are sequentially distributed from bottom to top, wherein the inner lower segment prestressed tendon, the outer middle segment prestressed tendon and the inner upper segment prestressed tendon are formed by the same slow-setting prestressed tendon,
the inner lower segment prestressed tendon is positioned in a section of reinforcement cage at the middle part or the lower part of the reinforcement cage assembly, the lower end of the inner lower segment prestressed tendon is fixed on the section of reinforcement cage, and the upper end of the inner lower segment prestressed tendon extends upwards along the inner wall of the reinforcement cage and penetrates out of the outer side of the reinforcement cage assembly from the upper end of the section of reinforcement cage;
the outer middle-section prestressed tendon is positioned at the outer side of the reinforcement cage assembly, and the upper end of the outer middle-section prestressed tendon penetrates into the inner side of the reinforcement cage assembly at a position h meters away from the top end of the reinforcement cage assembly;
interior upper segment prestressing tendons is located the inboard of the steel reinforcement cage of steel reinforcement cage subassembly, and the upper end of interior upper segment prestressing tendons up extends along the inner wall of steel reinforcement cage, and the upper end of interior upper segment prestressing tendons is fixed on the upper portion that is located a section steel reinforcement cage of the top.
The slow setting prestressed cast-in-place pile steel reinforcement cage structure adopts a sectional manufacturing construction mode, the arrangement of slow setting prestressed tendons is optimized, the slow setting prestressed tendons adopt an arrangement mode of 'middle section external and two ends internal', concretely, the inner lower section prestressed tendons are positioned in a section of steel reinforcement cage at the middle part or the lower part of the steel reinforcement cage assembly, and the upper ends of the inner lower section prestressed tendons penetrate out of the outer side of the steel reinforcement cage assembly from the upper ends of the section of steel reinforcement cage; the outer middle-section prestressed tendons are positioned on the outer side of the reinforcement cage assembly, the upper ends of the outer middle-section prestressed tendons penetrate into the inner side of the reinforcement cage assembly at a position h meters away from the top end of the reinforcement cage assembly, and the upper ends of the inner upper-section prestressed tendons are fixed on the upper portion of the uppermost reinforcement cage; therefore, the formed retarding prestressed filling pile reinforcement cage structure has reliable bearing capacity, the bearing capacity of the filling pile structure cannot be influenced, and meanwhile, because the outer middle section prestressed tendons of the retarding prestressed tendons are arranged outside and pass through the reinforcement cage at the middle section from the outer side, the construction process can be effectively simplified, the construction is convenient, and the labor and the time cost are saved; therefore, the construction process can be simplified, the construction is convenient, and the labor and the time cost are saved under the condition that the bearing capacity of the cast-in-place pile structure is not influenced.
Preferably, the lower end of the lowermost section of the reinforcement cage is provided with a lower end plate, and the lower end of the inner lower section of the prestressed tendon is fixed on the lower end plate. So, set up the lower plate and fix a section steel reinforcement cage and interior hypomere prestressing tendons of below at the bottom of the pile, can effectively guarantee the initial form of slowly condensing prestressing tendons and steel reinforcement cage, improve the construction quality of pile body, and produce the minimum to pouring of concrete and disturb.
Preferably, the lower end plate is an annular plate. In this way, the disturbance of the lower end plate to the concrete pouring can be further reduced.
Preferably, the upper end of the uppermost section of the reinforcement cage is provided with an upper end plate, and the upper end of the inner upper-section prestressed tendon is fixed on the upper end plate. So, set up the upper end plate and fix a section of steel reinforcement cage and the interior upper segment prestressing tendons of top at the stake surely, can effectively guarantee the initial form of slowly condensing prestressing tendons and steel reinforcement cage, improve the construction quality of pile body.
Preferably, the steel bar cage further comprises a reinforcing hoop structure, the reinforcing hoop structure is formed by reinforcing hoops surrounding the outer middle section prestressed tendons, and the reinforcing hoops hoop the outer middle section prestressed tendons on the steel bar cage. So, can further improve the structural stability who is located the outer middle section prestressed reinforcement in the steel reinforcement cage outside, improve the bearing capacity of bored concrete pile structure.
Preferably, the reinforcement cage comprises vertical reinforcements and main stirrups surrounding the outer sides of the vertical reinforcements, at least part of the reinforcement cage is further provided with a fixing ring plate, the fixing ring plate is provided with a plurality of reinforcement through holes in one-to-one correspondence with the vertical reinforcements, the vertical reinforcements of the reinforcement cage penetrate through the corresponding reinforcement through holes, and the fixing ring plate is fixedly connected with the vertical reinforcements. Therefore, the structural stability and the bearing capacity of the reinforcement cage can be further improved.
Preferably, the steel bar fixing device further comprises a guide structure, the guide structure corresponds to the fixing ring plates one to one, the guide structure comprises a plurality of guide ribs which are uniformly distributed in the circumferential direction of the fixing ring plates, the guide ribs sequentially comprise a lower connecting section, an arc-shaped guide section and an upper connecting section from bottom to top, the arc-shaped guide section is located on the inner side of the fixing ring plates, the lower connecting section is located below the fixing ring plates and fixed on the steel bar cage, and the upper connecting section is located above the fixing ring plates and fixed on the steel bar cage. So, at the concrete placement in-process, the pipe for concreting is at the in-process that vibrates and promote, when the position of pipe through the fixed ring board, can lead through the direction rib, avoids the concrete placement in-process to the vibrating and promotion production influence of pipe, improves pile body construction shaping quality, ensures structural safety.
Preferably, the length of the reinforcement cage is greater than h meters.
A sectional construction method of a reinforcement cage structure of a slow-setting prestressed cast-in-place pile sequentially comprises the following steps:
firstly, constructing a pile hole;
secondly, placing the slow-setting prestressed tendon in the first section of reinforcement cage, fixedly connecting one end of the slow-setting prestressed tendon to one end of the first section of reinforcement cage, then, hoisting the first section of reinforcement cage into the pile hole, and enabling one end of the reinforcement cage fixedly connected with one end of the slow-setting prestressed tendon to face downwards;
thirdly, a second section of reinforcement cage is hung at the upper port of the pile hole, the slow-setting prestressed tendon penetrates out of the reinforcement cage from the upper end of the first section of reinforcement cage to enable the slow-setting prestressed tendon to be positioned outside the second section of reinforcement cage, and then the upper end of the first section of reinforcement cage is connected with the lower end of the second section of reinforcement cage in a welding mode; wherein, the slow-setting prestressed tendon in the first section of reinforcement cage forms an inner lower section prestressed tendon;
fourthly, a third section of reinforcement cage is hoisted to the upper port of the pile hole, the slow-setting prestressed tendon is positioned at the outer side of the third section of reinforcement cage, and then the upper end of the second section of reinforcement cage is connected with the lower end of the third section of reinforcement cage in a welding manner;
fifthly, returning to the fourth step until the length of the reinforcement cage assembly reaches a set height;
sixthly, penetrating the upper end of the slow-setting prestressed tendon into the inner side of a reinforcement cage of the reinforcement cage assembly at a position h meters away from the top end of the reinforcement cage assembly, and then fixing the upper end of the slow-setting prestressed tendon at the upper end of the uppermost reinforcement cage; wherein the slow setting prestressed tendons that are located the reinforcing bar cage subassembly outside constitute outer middle section prestressed tendons, and the slow setting prestressed tendons in the reinforcing bar cage that is close to reinforcing bar cage subassembly upper end constitutes interior upper segment prestressed tendons.
In the slow-setting prestressed bored concrete pile reinforcement cage structure formed by adopting the sectional construction method of the scheme, the slow-setting prestressed tendons are arranged in an arrangement mode of arranging the middle sections externally and arranging the two ends internally, so that the slow-setting prestressed bored concrete pile reinforcement cage structure of the structure has reliable bearing capacity, and the bearing capacity of the bored concrete pile structure can be improved; meanwhile, the prestressed tendons at the outer middle section of the slow-setting prestressed tendons are arranged externally and penetrate through the reinforcement cage at the middle section from the outer side, so that the construction process can be effectively simplified, the construction is convenient, and the labor and time cost are saved; therefore, the construction process can be simplified, the construction is convenient, and the labor and the time cost are saved under the condition that the bearing capacity of the cast-in-place pile structure is not influenced.
The invention has the beneficial effects that: the segmented construction process of the slow-setting prestressed filling pile reinforcement cage structure can be effectively simplified under the condition that the bearing capacity of the filling pile structure is not influenced, construction is convenient, and labor and time cost are saved.
Drawings
Fig. 1 is a partial structural view of the connection portion of the two lowermost steel reinforcement cages in the slow-setting prestressed filling pile cage structure of the invention.
Fig. 2 is a partial structural view of the guide structure in the cage structure of the slow-setting prestressed filling pile of the present invention (the main stirrup is removed).
In the figure:
the steel reinforcement cage comprises a steel reinforcement cage 1, vertical steel reinforcements 1.1, main stirrups 1.2 and a fixed annular plate 1.3;
the prestressed tendon 2 of slow setting, the inner lower segment prestressed tendon 2.1, the outer middle segment prestressed tendon 2.2;
a reinforcement stirrup 3;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all embodiments. Other embodiments obtained by persons skilled in the art without making creative efforts based on the embodiments in the implementation belong to the protection scope of the invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, "upper" includes an upper end and "lower" includes a lower end.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and fig. 2, a slow-setting prestressed pile reinforcement cage structure includes a reinforcement cage assembly and slow-setting prestressed tendons 2.
The reinforcement cage assembly comprises a plurality of reinforcement cages 1 which are sequentially distributed from bottom to top, and any two adjacent reinforcement cages are connected. In this embodiment, any two adjacent sections of reinforcement cages are connected by welding.
The slow-setting prestressed tendon 2 comprises an inner lower-section prestressed tendon 2.1, an outer middle-section prestressed tendon 2.2 and an inner upper-section prestressed tendon which are sequentially distributed from bottom to top, wherein the inner lower-section prestressed tendon, the outer middle-section prestressed tendon and the inner upper-section prestressed tendon are formed by the same slow-setting prestressed tendon.
The inner lower segment prestressed tendon 2.1 is positioned in the steel reinforcement cage at the bottom, the lower end of the inner lower segment prestressed tendon is fixed at the lower end of the steel reinforcement cage at the bottom, and the upper end of the inner lower segment prestressed tendon upwards extends along the inner wall of the steel reinforcement cage and penetrates out of the outer side of the steel reinforcement cage assembly from the upper end of the steel reinforcement cage at the bottom. The outer middle section prestressed tendon 2.2 is positioned at the outer side of the steel bar cage assembly, and the upper end of the outer middle section prestressed tendon penetrates into the inner side of the steel bar cage assembly at a position h meters away from the top end of the steel bar cage assembly; in this embodiment, the length of the reinforcement cage is greater than h meters, for example, the length of the reinforcement cage is 9 meters, and the value of h is 5 meters. The inner upper prestressed tendon is located on the inner side of the steel reinforcement cage assembly, the upper end of the inner upper prestressed tendon extends upwards along the inner wall of the steel reinforcement cage, and the upper end of the inner upper prestressed tendon is fixed on the upper end of the steel reinforcement cage located at the top.
The reinforcement cage structure of the slow-setting prestressed cast-in-place pile of the embodiment adopts a sectional manufacturing construction mode, the arrangement of slow-setting prestressed tendons is optimized, the slow-setting prestressed tendons adopt an arrangement mode of 'external middle section and internal two ends', specifically, the inner lower section prestressed tendons are positioned in the lowermost reinforcement cage, and the upper ends of the inner lower section prestressed tendons penetrate out of the outer side of the reinforcement cage assembly from the upper ends of the lowermost reinforcement cage; the outer middle-section prestressed tendon is positioned at the outer side of the reinforcement cage assembly, the upper end of the outer middle-section prestressed tendon penetrates into the inner side of the reinforcement cage assembly at a position h meters away from the top end of the reinforcement cage assembly, and the upper end of the inner upper-section prestressed tendon is fixed at the upper end of the uppermost reinforcement cage; therefore, the formed retarding prestressed filling pile reinforcement cage structure has reliable bearing capacity, the bearing capacity of the filling pile structure cannot be influenced, and meanwhile, because the outer middle section prestressed tendons of the retarding prestressed tendons are arranged outside and pass through the reinforcement cage at the middle section from the outer side, the construction process can be effectively simplified, the construction is convenient, and the labor and the time cost are saved; therefore, the construction process can be simplified, the construction is convenient, and the labor and the time cost are saved under the condition that the bearing capacity of the cast-in-place pile structure is not influenced.
Specifically, the reinforcement cage 1 includes a plurality of vertical reinforcing bars 1.1 that circumference distributes in proper order and encircles main stirrup 1.2 in the vertical reinforcing bar outside.
Furthermore, the lower end of the lowermost section of the reinforcement cage is provided with a lower end plate, and the lower end of the inner lower section of the prestressed tendon is fixed on the lower end plate. In this embodiment, the lower end plate is an annular plate. So, set up the lower plate and fix a section steel reinforcement cage and interior hypomere prestressing tendons of below at the bottom of the pile, can effectively guarantee the initial form of slowly condensing prestressing tendons and steel reinforcement cage, improve the construction quality of pile body, and produce the minimum to pouring of concrete and disturb.
Furthermore, an upper end plate is arranged at the upper end of the uppermost section of the steel reinforcement cage, and the upper end of the inner upper section of the prestressed reinforcement is fixed on the upper end plate. So, set up the upper end plate and fix a section of steel reinforcement cage and the interior upper segment prestressing tendons of top at the stake surely, can effectively guarantee the initial form of slowly condensing prestressing tendons and steel reinforcement cage, improve the construction quality of pile body.
Further, as shown in fig. 1, the slow-setting prestressed filling pile cage structure further comprises a reinforcing hoop structure. The reinforced hoop structure is composed of reinforced hoops 3 surrounding the outer middle section prestressed tendons, and the reinforced hoops hoop the outer middle section prestressed tendons on the reinforcement cage. So, can further improve the structural stability who is located the outer middle section prestressing tendons in the steel reinforcement cage outside to improve the bearing capacity of bored concrete pile structure.
Further, as shown in fig. 2, at least some of the reinforcement cages are further provided with a fixing ring plate, and in this embodiment, each reinforcement cage is provided with a plurality of fixing ring plates 1.3 sequentially distributed from top to bottom. The fixing ring plate is provided with a plurality of steel bar through holes which are in one-to-one correspondence with the vertical steel bars, the vertical steel bars of the steel bar cage penetrate through the corresponding steel bar through holes, and the fixing ring plate is fixedly connected with the vertical steel bars. The fixed ring plate is connected with the vertical steel bars through welding. Therefore, the structural stability and the bearing capacity of the reinforcement cage can be further improved.
Further, as shown in fig. 2, the slow-setting prestressed filling pile cage structure further comprises a guiding structure. The guide structures correspond to the fixed ring plates one to one. The guide structure comprises a plurality of guide ribs 4 which are uniformly distributed around the circumference of the fixed ring plate. The guide rib comprises a lower connecting section 4.3, an arc-shaped guide section 4.2 and an upper connecting section 4.1 from bottom to top in sequence. The arc guide section is located the inboard of fixed ring board, and lower linkage segment is located the below of fixed ring board and fixes on the steel reinforcement cage, and the upper linkage segment is located the top of fixed ring board and fixes on the steel reinforcement cage. So, at the concrete placement in-process for the pipe of concreting when the pipe passes through the position of fixed ring board at the in-process that vibrates and promotes, can lead through the direction rib, avoids the concrete placement in-process to the vibration and the promotion production influence of pipe, improves pile body construction shaping quality, ensures the structural safety.
The second concrete embodiment: as shown in fig. 1 and 2, a slow-setting prestressed cast-in-place pile steel reinforcement cage structure includes a steel reinforcement cage assembly and a slow-setting prestressed reinforcement 2. The reinforcement cage assembly comprises a plurality of reinforcement cages 1 which are sequentially distributed from bottom to top, and any two adjacent reinforcement cages are connected. In this embodiment, any two adjacent sections of reinforcement cages are connected by welding.
The slow-setting prestressed tendon 2 comprises an inner lower segment prestressed tendon 2.1, an outer middle segment prestressed tendon 2.2 and an inner upper segment prestressed tendon which are sequentially distributed from bottom to top, wherein the inner lower segment prestressed tendon, the outer middle segment prestressed tendon and the inner upper segment prestressed tendon are composed of the same slow-setting prestressed tendon.
The inner lower segment prestressed tendon is located in a section of the steel reinforcement cage at the lower part of the steel reinforcement cage assembly, and the lower end of the inner lower segment prestressed tendon is fixed on the section of the steel reinforcement cage, for example, the lower end of the inner lower segment prestressed tendon is fixed at the lower end of the section of the steel reinforcement cage, or the lower end of the inner lower segment prestressed tendon is fixed at the lower part or the middle part of the section of the steel reinforcement cage. The upper end of the inner lower segment prestressed tendon extends upwards along the inner wall of the reinforcement cage and penetrates out of the outer side of the reinforcement cage assembly from the upper end of the reinforcement cage.
The outer middle section prestressed tendon 2.2 is positioned at the outer side of the steel bar cage assembly, and the upper end of the outer middle section prestressed tendon penetrates into the inner side of the steel bar cage assembly at a position h meters away from the top end of the steel bar cage assembly; in this embodiment, the length of the reinforcement cage is greater than h meters, for example, the length of the reinforcement cage is 9 meters, and the value of h is 5 meters. Interior upper segment prestressing tendons is located the inboard of the steel reinforcement cage of steel reinforcement cage subassembly, and the upper end of interior upper segment prestressing tendons up extends along the inner wall of steel reinforcement cage, and the upper portion at the steel reinforcement cage that is located the top is fixed to the upper end of interior upper segment prestressing tendons, and in this embodiment, the upper end of interior upper segment prestressing tendons is fixed in the upper end that is located the steel reinforcement cage of the top.
Furthermore, a plurality of fixed ring plates are arranged in each reinforcement cage from top to bottom in sequence. Be equipped with a plurality of reinforcing bar via holes with vertical reinforcement one-to-one on the fixed ring board, the vertical reinforcing bar of steel reinforcement cage passes the reinforcing bar via hole that corresponds, and fixed ring board and vertical reinforcing bar fixed connection. The fixed ring plate is connected with the vertical steel bars through welding. In this embodiment, the lower end of the inner lower segment prestressed tendon is fixed on the fixing ring plate at the lower part or the middle part of the section of steel reinforcement cage, or the lower end of the inner lower segment prestressed tendon is fixed on the vertical steel bar at the lower part or the middle part of the section of steel reinforcement cage, so as to fix the lower end of the inner lower segment prestressed tendon at the lower part or the middle part of the section of steel reinforcement cage.
The third concrete embodiment: as shown in fig. 1 and fig. 2, a slow-setting prestressed pile reinforcement cage structure includes a reinforcement cage assembly and slow-setting prestressed tendons 2. The reinforcement cage assembly comprises a plurality of reinforcement cages 1 which are sequentially distributed from bottom to top, and any two adjacent reinforcement cages are connected. In this embodiment, any two adjacent sections of reinforcement cages are connected by welding.
The slow-setting prestressed tendon 2 comprises an inner lower segment prestressed tendon 2.1, an outer middle segment prestressed tendon 2.2 and an inner upper segment prestressed tendon which are sequentially distributed from bottom to top, wherein the inner lower segment prestressed tendon, the outer middle segment prestressed tendon and the inner upper segment prestressed tendon are composed of the same slow-setting prestressed tendon.
The inner lower segment prestressed tendon is located in a section of the reinforcement cage in the middle of the reinforcement cage assembly, and the lower end of the inner lower segment prestressed tendon is fixed on the section of the reinforcement cage, for example, the lower end of the inner lower segment prestressed tendon is fixed at the lower end of the section of the reinforcement cage, or the lower end of the inner lower segment prestressed tendon is fixed at the lower part or the middle of the section of the reinforcement cage. The upper end of the inner lower segment prestressed tendon extends upwards along the inner wall of the reinforcement cage and penetrates out of the outer side of the reinforcement cage assembly from the upper end of the reinforcement cage.
The outer middle section prestressed tendon 2.2 is positioned at the outer side of the steel bar cage assembly, and the upper end of the outer middle section prestressed tendon penetrates into the inner side of the steel bar cage assembly at a position h meters away from the top end of the steel bar cage assembly; in this embodiment, the length of the reinforcement cage is greater than h meters, for example, the length of the reinforcement cage is 9 meters, and the value of h is 5 meters. Interior upper segment prestressing tendons is located the inboard of the steel reinforcement cage of steel reinforcement cage subassembly, and the upper end of interior upper segment prestressing tendons up extends along the inner wall of steel reinforcement cage, and the upper end of interior upper segment prestressing tendons is fixed on the upper portion that is located the steel reinforcement cage of the top, and in this embodiment, the upper end of interior upper segment prestressing tendons is fixed in the upper end that is located the steel reinforcement cage of the top.
Furthermore, a plurality of fixed ring plates are arranged in each reinforcement cage from top to bottom in sequence. Be equipped with a plurality of reinforcing bar via holes with vertical reinforcement one-to-one on the fixed ring board, the vertical reinforcing bar of steel reinforcement cage passes the reinforcing bar via hole that corresponds, and fixed ring board and vertical reinforcing bar fixed connection. The fixed ring plate is connected with the vertical steel bars through welding. In this embodiment, the lower end of the inner lower segment prestressed tendon is fixed on the fixing ring plate at the lower part or the middle part of the section of steel reinforcement cage, or the lower end of the inner lower segment prestressed tendon is fixed on the vertical steel bar at the lower part or the middle part of the section of steel reinforcement cage, so as to fix the lower end of the inner lower segment prestressed tendon at the lower part or the middle part of the section of steel reinforcement cage.
Fourth specific embodiment, referring to the first specific embodiment, the concrete structure of the reinforcement cage structure of the slow-setting prestressed filling pile in this embodiment,
a sectional construction method of a reinforcement cage structure of a slow-setting prestressed cast-in-place pile sequentially comprises the following steps:
first, a pile hole is constructed.
Secondly, placing the slow-setting prestressed tendon in the first section of reinforcement cage, and fixedly connecting one end of the slow-setting prestressed tendon to one end of the first section of reinforcement cage, specifically, placing the slow-setting prestressed tendon in the first section of reinforcement cage when the first section of reinforcement cage is flatly placed on the ground surface, and fixedly connecting one end of the slow-setting prestressed tendon to one end of the first section of reinforcement cage; then, the first section of reinforcement cage is hoisted into the pile hole, and one end of the reinforcement cage fixedly connected with one end of the delayed coagulation prestressed tendon faces downwards; thus, the operation of the second step is convenient.
Thirdly, a second section of reinforcement cage is hung at the upper port of the pile hole, the slow-setting prestressed tendon penetrates out of the reinforcement cage from the upper end of the first section of reinforcement cage to enable the slow-setting prestressed tendon to be positioned outside the second section of reinforcement cage, and then the upper end of the first section of reinforcement cage is connected with the lower end of the second section of reinforcement cage in a welding mode; wherein, the slow-setting prestressed tendons positioned in the first section of reinforcement cage form inner lower-section prestressed tendons; because when hanging the second section steel reinforcement cage, the slow setting knot prestressing tendons is in the outside of second section steel reinforcement cage, so, the convenient operation of hanging the second section steel reinforcement cage that puts that can be very convenient makes the third step.
Fourthly, a third section of reinforcement cage is hoisted to the upper port of the pile hole, the slow-setting prestressed tendon is positioned at the outer side of the third section of reinforcement cage, and then the upper end of the second section of reinforcement cage is connected with the lower end of the third section of reinforcement cage in a welding manner; and when the third section of reinforcement cage is hoisted, the slow-setting prestressed tendon is positioned at the outer side of the third section of reinforcement cage, so that the third section of reinforcement cage can be very conveniently hoisted, and the operation of the fourth step is convenient.
And fifthly, returning to the fourth step until the length of the reinforcement cage assembly reaches the set height.
Sixthly, penetrating the upper end of the slow-setting prestressed tendon into the inner side of a reinforcement cage of the reinforcement cage assembly at a position h meters away from the top end of the reinforcement cage assembly, and then fixing the upper end of the slow-setting prestressed tendon at the upper end of the uppermost reinforcement cage; wherein the slow setting prestressed tendons that are located the reinforcing bar cage subassembly outside constitute outer middle section prestressed tendons, and the slow setting prestressed tendons in the reinforcing bar cage that is close to reinforcing bar cage subassembly upper end constitutes interior upper segment prestressed tendons. So, one section slowly congeals prestressing tendons that can be very convenient the top penetrates the steel reinforcement cage inboard of steel reinforcement cage subassembly, its convenient operation. In this embodiment, h is 5 meters, and the height of the reinforcement cage is 9 meters.
In the slow-setting prestressed bored concrete pile reinforcement cage structure formed by the sectional construction method of this embodiment, the slow-setting prestressed tendons are arranged in an arrangement manner of "external middle section and internal two ends", and the slow-setting prestressed bored concrete pile reinforcement cage structure of this structure has reliable bearing capacity, and can improve the bearing capacity of the bored concrete pile structure; meanwhile, the construction flow can be effectively simplified, the construction is convenient, and the labor and time cost are saved; therefore, the construction process can be simplified, the construction is convenient, and the labor and the time cost are saved under the condition that the bearing capacity of the cast-in-place pile structure is not influenced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a slow setting knot prestressed bored concrete pile steel reinforcement cage structure, characterized by includes:
the steel reinforcement cage assembly comprises a plurality of steel reinforcement cages which are sequentially distributed from bottom to top, and any two adjacent steel reinforcement cages are connected;
the slow setting prestressed tendon comprises an inner lower section prestressed tendon, an outer middle section prestressed tendon and an inner upper section prestressed tendon which are sequentially distributed from bottom to top, wherein the inner lower section prestressed tendon, the outer middle section prestressed tendon and the inner upper section prestressed tendon are formed by the same slow setting prestressed tendon,
the inner lower segment prestressed tendon is positioned in a section of reinforcement cage at the middle part or the lower part of the reinforcement cage assembly, the lower end of the inner lower segment prestressed tendon is fixed on the section of reinforcement cage, and the upper end of the inner lower segment prestressed tendon extends upwards along the inner wall of the reinforcement cage and penetrates out of the outer side of the reinforcement cage assembly from the upper end of the section of reinforcement cage;
the outer middle-section prestressed tendons are positioned on the outer side of the steel bar cage assembly, and the upper ends of the outer middle-section prestressed tendons penetrate into the inner side of the steel bar cage assembly at a position h meters away from the top end of the steel bar cage assembly;
interior upper segment prestressing tendons is located the inboard of the steel reinforcement cage of steel reinforcement cage subassembly, and the upper end of interior upper segment prestressing tendons up extends along the inner wall of steel reinforcement cage, and the upper end of interior upper segment prestressing tendons is fixed on the upper portion that is located a section steel reinforcement cage of the top.
2. The slow-setting prestressed bored concrete pile steel reinforcement cage structure of claim 1, wherein the lower end of the lowermost section of steel reinforcement cage is provided with a lower end plate, and the lower ends of the inner lower prestressed tendons are fixed on the lower end plate.
3. The slow-setting prestressed filling pile cage structure according to claim 2, wherein said lower end plate is an annular plate.
4. The slow-setting prestressed pile reinforcement cage structure of claim 1, 2 or 3, wherein the upper end of the uppermost section of reinforcement cage is provided with an upper end plate, and the upper ends of the inner upper prestressed tendons are fixed on the upper end plate.
5. A slow-setting prestressed pile reinforcement cage structure according to claim 1, 2 or 3, further comprising a reinforcement hoop structure, wherein the reinforcement hoop structure is formed by reinforcement stirrups surrounding the outer intermediate prestressed tendons, and the reinforcement stirrups clamp the outer intermediate prestressed tendons to the reinforcement cage.
6. The structure of the slow-setting prestressed bored concrete pile reinforcement cage according to claim 1, 2 or 3, wherein the reinforcement cage comprises vertical reinforcements and main stirrups surrounding the vertical reinforcements, at least some of the reinforcement cages are provided with fixing ring plates, the fixing ring plates are provided with a plurality of reinforcement through holes corresponding to the vertical reinforcements one by one, the vertical reinforcements of the reinforcement cages pass through the corresponding reinforcement through holes, and the fixing ring plates are fixedly connected with the vertical reinforcements.
7. The structure of a slow-setting prestressed filling pile steel reinforcement cage according to claim 6, further comprising a guiding structure, wherein the guiding structure is in one-to-one correspondence with the fixed ring plate, the guiding structure comprises a plurality of guiding ribs uniformly distributed around the circumference of the fixed ring plate, the guiding ribs comprise, from bottom to top, a lower connecting section, an arc-shaped guiding section and an upper connecting section, the arc-shaped guiding section is located inside the fixed ring plate, the lower connecting section is located below the fixed ring plate and fixed on the steel reinforcement cage, and the upper connecting section is located above the fixed ring plate and fixed on the steel reinforcement cage.
8. A sectional construction method of the slow-setting prestressed filling pile reinforcement cage structure according to any one of claims 1 to 7, which is characterized by comprising the following steps in sequence:
firstly, constructing a pile hole;
secondly, placing the slow-setting prestressed tendon in a first section of reinforcement cage, fixedly connecting one end of the slow-setting prestressed tendon to one end of the first section of reinforcement cage, then, hoisting the first section of reinforcement cage into the pile hole, and enabling one end of the reinforcement cage fixedly connected with one end of the slow-setting prestressed tendon to face downwards;
thirdly, hanging a second section of reinforcement cage to the upper port of the pile hole, penetrating the slow-setting prestressed reinforcement out of the outer side of the reinforcement cage from the upper end of the first section of reinforcement cage to enable the slow-setting prestressed reinforcement to be positioned at the outer side of the second section of reinforcement cage, and then welding and connecting the upper end of the first section of reinforcement cage with the lower end of the second section of reinforcement cage; wherein, the slow-setting prestressed tendons positioned in the first section of reinforcement cage form inner lower-section prestressed tendons;
fourthly, a third section of reinforcement cage is hoisted to the upper port of the pile hole, the slow-setting prestressed tendon is positioned at the outer side of the third section of reinforcement cage, and then the upper end of the second section of reinforcement cage is connected with the lower end of the third section of reinforcement cage in a welding manner;
fifthly, returning to the fourth step until the length of the reinforcement cage assembly reaches a set height;
sixthly, penetrating the upper end of the slow-setting prestressed tendon into the inner side of a reinforcement cage of the reinforcement cage assembly at a position h meters away from the top end of the reinforcement cage assembly, and then fixing the upper end of the slow-setting prestressed tendon at the upper end of the uppermost reinforcement cage; wherein the slow setting prestressed tendon that is located the reinforcing bar cage subassembly outside constitutes outer middle section prestressed tendon, and the slow setting prestressed tendon in the reinforcing bar cage of the reinforcing bar cage subassembly upper end that is close to constitutes interior upper segment prestressed tendon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661748.6A CN113502807B (en) | 2021-06-15 | 2021-06-15 | Slow-setting prestressed cast-in-place pile reinforcement cage structure and segmented construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661748.6A CN113502807B (en) | 2021-06-15 | 2021-06-15 | Slow-setting prestressed cast-in-place pile reinforcement cage structure and segmented construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113502807A CN113502807A (en) | 2021-10-15 |
| CN113502807B true CN113502807B (en) | 2022-08-19 |
Family
ID=78010060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110661748.6A Active CN113502807B (en) | 2021-06-15 | 2021-06-15 | Slow-setting prestressed cast-in-place pile reinforcement cage structure and segmented construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113502807B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232614A (en) * | 2022-01-31 | 2022-03-25 | 中铁六局集团广州工程有限公司 | Anti-floating pile construction method based on slow-bonding prestressed steel strand |
| CN114960627B (en) * | 2022-05-20 | 2023-03-10 | 中国建筑第二工程局有限公司 | Construction method of overlong slow-bonding prestressed cast-in-place pile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302760A (en) * | 2008-06-25 | 2008-11-12 | 天津三建建筑工程有限公司 | Ultralong overweight concrete filling pile reinforcement type reinforcing steel bar caging |
| CN109235424A (en) * | 2018-09-18 | 2019-01-18 | 中国十九冶集团有限公司 | Sectional installation method for pile foundation reinforcement cage |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100430342B1 (en) * | 2001-07-25 | 2004-05-04 | 원 회 양 | A formative installation and construction method of concrete file that projection is protruded into a radial shape |
| JP5382394B1 (en) * | 2013-03-11 | 2014-01-08 | 株式会社恵信工業 | A method for linking and installing a reinforced steel bar and a reinforced steel frame for the same. |
| CN109555119B (en) * | 2018-12-11 | 2020-09-01 | 浙江省建筑设计研究院 | Retarding and coagulating prestressed cast-in-place pile for resisting pulling and method |
-
2021
- 2021-06-15 CN CN202110661748.6A patent/CN113502807B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302760A (en) * | 2008-06-25 | 2008-11-12 | 天津三建建筑工程有限公司 | Ultralong overweight concrete filling pile reinforcement type reinforcing steel bar caging |
| CN109235424A (en) * | 2018-09-18 | 2019-01-18 | 中国十九冶集团有限公司 | Sectional installation method for pile foundation reinforcement cage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113502807A (en) | 2021-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020001156A1 (en) | Bridge and bridge pier thereof | |
| CN113502807B (en) | Slow-setting prestressed cast-in-place pile reinforcement cage structure and segmented construction method thereof | |
| CN109853363A (en) | Pipe pier and cushion cap connection structure and construction method | |
| CN209722702U (en) | Pipe pier and cushion cap connection structure | |
| CN111364352A (en) | Prefabricated pipe pier and cast-in-place pile connecting structure and construction method | |
| CN109989395B (en) | Large storage tank filling pile assembled pile cap and construction method thereof | |
| CN106639052A (en) | Fabricated structural system of steel plate reinforced concrete shear walls and construction method of fabricated structural system | |
| CN213233111U (en) | Concrete filled steel tube pier connecting structure with PBL (Poly-p-phenylene benzobisoxazole) shear keys | |
| CN215978069U (en) | Reinforcing cage structure of slow-setting prestressed cast-in-place pile | |
| CN109267489B (en) | Construction method for cable-stayed bridge cable tower anchoring area | |
| CN111764299A (en) | Pile-column integrated assembling type bridge cap beam elevation control equipment and control method | |
| CN103061334B (en) | I-section prestressed reinforced concrete support pile by centrifugal pouring | |
| CN215441418U (en) | Pier column structure | |
| CN216505824U (en) | Shell ring and tower body | |
| CN216198677U (en) | Tower section, tower and wind power tower | |
| CN115467249A (en) | Rear rib method assembly type pier stud construction method | |
| CN215330441U (en) | Precast concrete beam column connection structure | |
| CN215168600U (en) | Steel pipe concrete combination formula tower section of thick bamboo | |
| CN210508405U (en) | Multi-cavity thin-wall steel plate concrete combined shear wall steel structure system | |
| CN210216398U (en) | Large-scale storage tank bored concrete pile assembled pile cap | |
| CN210857194U (en) | Cast-in-place reinforcement cage structure | |
| CN210767204U (en) | Prefabricated concrete component and concrete structure system | |
| CN212452268U (en) | Connecting structure of prefabricated cylinder and pile foundation | |
| CN220377257U (en) | Anti-floating structure for bored pile reinforcement cage | |
| CN217840575U (en) | Precast concrete constructional column |
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 |