UHPC (Ultra High Performance Concrete) embedded giant prefabricated column based on fabricated structure and connecting method
By adopting UHPC embedded giant prefabricated columns based on prefabricated structures in urban rail transit, combining grouting joints and strand energy consumption technology, the problem that existing connection methods are difficult to adapt to standardized and rapid construction is achieved, and high efficiency is achieved , safe and economical prestressing effect.
Patent Information
- Application Number
- CN202411557328.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-02-07
AI Technical Summary
The connection method between the existing prefabricated pier columns and the bearing platform is difficult to meet the requirements of standardized and rapid construction of urban rail transit, and the construction of prestressed ribs is difficult, slow, and high.
UHPC embedded giant prefabricated columns based on prefabricated structures are connected through the grouting joints of the prefabricated concrete base bearings, and steel strands and hollow UHPC legs are installed in the prefabricated UHPC section, using steel strands and steel strands and The energy consumption effect of the energy consumption bar forms no bond prestress.
It has achieved strong bending load-bearing capacity, good node deformation and self-recovery capabilities, high seismic resistance and strong collapse resistance. At the same time, the structural form of the anchoring place is simplified, the construction difficulty and cost are reduced, and construction efficiency is improved.
Smart Images
Figure CN119392594A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of urban rail transit elevated structures and construction engineering, and in particular to a UHPC embedded giant prefabricated column based on an assembled structure and a connection method. Background Art
[0002] Urban rail transit elevated stations and rail bridges often adopt a single column form, which has a large scale and high bearing capacity requirements. Traditional elevated station single columns and rail bridge piers often adopt cast-in-place construction methods, involving multiple links such as on-site formwork, steel bar binding, concrete pouring, maintenance and demoulding. This method not only has a long construction period, occupies a wide operating area, but also requires a large amount of manpower. It not only causes traffic interference to the surrounding roads for a long construction period, but also may pollute the air environment, making it difficult to meet the standards of modern civilized construction.
[0003] With the acceleration of urbanization in my country, the use of standardized prefabrication and assembly construction technology has become an emerging trend. Compared with the traditional cast-in-place construction method, prefabricated piers stand out for their high efficiency, rapid construction, and environmental protection. They can effectively alleviate traffic interference, shorten the construction period, reduce environmental pollution, and reduce construction noise. At the same time, prefabricated piers also have the advantages of easy control of component quality and reduced life cycle costs of bridges.
[0004] At present, there are construction processes in China that use prefabricated structural connection technology for piers and caps. However, the conventional connection between prefabricated piers and caps often uses grouting sleeves, which requires extremely high precision in the installation of prefabricated components and construction hoisting, and has a small error adjustment. The other method of crimping prestressed tendons is often difficult to construct, slow, and costly. Both connection methods are difficult to meet the requirements of standardized and rapid construction of urban rail transit.
[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention
[0006] In view of the problems in the related art, the present invention proposes a UHPC embedded giant prefabricated column and a connection method based on an assembled structure to overcome the above-mentioned technical problems existing in the existing related art.
[0007] To this end, the specific technical solution adopted by the present invention is as follows: According to one aspect of the present invention, a UHPC embedded giant prefabricated column based on an assembled structure is provided. The UHPC embedded giant prefabricated column comprises a precast concrete foundation cap, a precast concrete column is arranged at the top of the precast concrete foundation cap, a precast UHPC segment matching the precast concrete foundation cap is arranged on the outer side of the bottom of the precast concrete column, and a steel bar channel matching the precast concrete column is opened at the top of the precast UHPC segment; the precast concrete foundation cap is connected to the precast concrete column through a grouting joint, a plurality of steel strands running through the precast concrete column and matching the precast UHPC segment are evenly arranged inside the precast concrete foundation cap, a steel strand anchor matching the precast UHPC segment is arranged at one end of the steel strand, and the other end of the steel strand is vertically pre-buried in the middle of the precast concrete foundation cap; a plurality of energy dissipation rods matching the precast concrete foundation cap are evenly arranged on the outer side of the bottom of the precast concrete column.
[0008] Furthermore, the precast UHPC section includes an annular concrete shell arranged on the outside of the middle part of the precast concrete column, and a plurality of side openings cooperating with the steel strands and the steel strand anchors are provided on the outside of the annular concrete shell, and hollow UHPC legs penetrating the precast concrete column and cooperating with the precast concrete foundation pedestal are provided inside the side openings.
[0009] Furthermore, the portion of the hollow UHPC leg that passes through the precast concrete column is perpendicular to the precast concrete foundation pedestal, and the hollow UHPC leg is located inside the annular concrete shell in an arc shape and is connected to the side opening; a steel strand hole that matches the steel strand is opened through the inner center of the hollow UHPC leg.
[0010] Furthermore, the precast concrete column comprises a reinforced concrete column body arranged on the top of the precast concrete foundation pedestal, and a plurality of energy dissipation rod connecting supports matching with the energy dissipation rods are evenly arranged on the outer side of the bottom of the reinforced concrete column body.
[0011] Furthermore, a groove is reserved at the location where the precast concrete foundation pedestal is connected to the steel strand, and the bottom end of the hollow UHPC leg is in contact with the groove; longitudinal reinforcement and annular stirrups that keep a distance from the steel strand are arranged inside the precast concrete foundation pedestal.
[0012] Furthermore, the cross-sectional dimensions of the precast concrete columns are greater than 1 m×1 m.
[0013] Furthermore, annular stirrups are arranged inside the prefabricated UHPC segment and are spaced apart from the steel bar holes and the steel strand holes.
[0014] Furthermore, a slurry outlet hole is provided at the end of the hollow UHPC leg; and a tape is wrapped around the surface of the steel strand.
[0015] According to another aspect of the present invention, a connection method of UHPC embedded giant prefabricated columns based on an assembled structure is also provided, and the connection method comprises the following steps: S1. Based on the pre-configured horizontal reinforcement of the prefabricated UHPC segment, a UHPC segment frame of annular concrete shell and hollow UHPC legs is constructed, and spaces for steel bar channels, side openings and steel strand channels are reserved in the UHPC segment frame; S2. Cast UHPC on the completed UHPC segment frame and perform maintenance; S3. Based on the cast UHPC segment frame, longitudinal and horizontal reinforcements of precast concrete columns are arranged, wherein the longitudinal reinforcements pass through the reinforcement holes and are connected by grouting materials; S4. Based on the longitudinal and horizontal reinforcements of the precast concrete columns, a concrete column frame is constructed, and energy-absorbing rods are pre-embedded on the outside of the concrete column frame to connect the supports. Ordinary concrete is poured into the constructed concrete column frame, and then maintained. S5, assembling the prefabricated concrete column and the prefabricated concrete foundation cap; S6. The gap between the precast concrete foundation cap and the concrete column is sealed around the perimeter by using the seat grout, and the inside of the precast concrete foundation cap and the concrete column and the steel strand duct are grouted and cured by grouting the side openings; S7, stretching the steel strands and filling the side openings with plugging materials; S8. Install the energy-absorbing rod based on the energy-absorbing rod connection support and complete the prefabricated pile connection.
[0016] Furthermore, assembling the prefabricated concrete column with the prefabricated concrete foundation cap comprises the following steps: S51, embedding the precast concrete foundation cap to a pre-set position; S52, hoisting the concrete column, passing the steel strands embedded in the precast concrete foundation cap through the steel strand holes in the concrete column; S53. Place the hollow UHPC legs in the reserved grooves of the precast concrete foundation cap to complete the assembly of the concrete column and the precast concrete foundation cap.
[0017] The beneficial effects of the present invention are: 1. Prefabricated structural columns and prefabricated concrete foundation caps dissipate energy through steel strands and energy dissipation rods under earthquake action. The steel strands are wrapped with sliding tapes and have no bonding with the grouting material. They can be tensioned after grouting to form non-bonded prestressing. The column foot has strong bending bearing capacity, good node deformation and self-recovery ability, strong energy dissipation capacity, high seismic performance, and strong anti-collapse ability.
[0018] 2. Grooves are set at the joints between the prefabricated structural columns and the prefabricated concrete foundation caps, and the UHPC legs are embedded. The joints have strong shear resistance and good structural integrity.
[0019] 3. The steel strands are set in the prefabricated UHPC section. UHPC has ultra-high performance and can effectively withstand the concentrated force at the prestressed anchorage, ensuring safety and simplifying the structural form of the anchorage. At the same time, it offsets the weakening effect of the anchor groove on the cross-sectional bearing capacity, which can ensure the high bearing capacity of large prefabricated columns and realize the safety of local prestressing of large columns.
[0020] 4. Local prestressed connections are set up in the column base area. The steel strands are softer when they are not prestressed, and have strong adaptability to the deviation of the channel. The shorter length makes it easier to insert the steel strand channel, which reduces the construction difficulty, improves the construction efficiency, shortens the construction period, and has cost advantages compared to conventional large prefabricated column bases.
[0021] 5. The hollow UHPC legs set in the prefabricated UHPC section, the steel strand ducts are all set in the UHPC. The prefabricated UHPC section is prefabricated in advance, which is conducive to the positioning of the steel strand ducts, avoiding the problem of difficult positioning and fixing of conventional steel strand ducts in the steel cage, and reducing the manufacturing difficulty of large prefabricated columns.
[0022] 6. This node is used in single-column elevated stations, bridge piers and other locations. The size of the large prefabricated column can effectively ensure the size space of the steel strand anchor and other components without affecting the appearance, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 2 is a schematic structural diagram of a UHPC embedded giant prefabricated column based on an assembled structure according to an embodiment of the present invention; Figure 2 is a cross-sectional view of a UHPC embedded giant prefabricated column based on an assembled structure according to an embodiment of the present invention; Figure 3 This is a front view structural diagram of a UHPC embedded giant prefabricated column based on an assembled structure according to an embodiment of the present invention; Figure 4 is a side structural diagram of a UHPC embedded giant prefabricated column based on an assembled structure according to an embodiment of the present invention; Figure 5is a front view structural diagram of a prefabricated UHPC segment in a UHPC embedded giant prefabricated column based on an assembled structure according to an embodiment of the present invention; Figure 6 is a side structural diagram of a prefabricated UHPC segment in a UHPC embedded giant prefabricated column based on an assembled structure according to an embodiment of the present invention; Figure 7 A cross-sectional view of a prefabricated UHPC section of a UHPC embedded giant prefabricated column based on an assembled structure according to an embodiment of the present invention; Figure 8 It is a flow chart of a UHPC embedded giant prefabricated column connection method based on an assembled structure according to an embodiment of the present invention.
[0025] In the figure: 1. Precast concrete foundation cap; 2. Precast concrete column; 3. Precast UHPC segment; 4. Steel bar channel; 5. Grouting joint; 6. Steel strand; 7. Steel strand anchor; 8. Energy dissipation rod; 9. Annular concrete shell; 10. Side opening; 11. Hollow UHPC leg; 12. Steel strand channel; 13. Reinforced concrete column; 14. Energy dissipation rod connecting support. DETAILED DESCRIPTION
[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0027] According to an embodiment of the present invention, a UHPC embedded giant prefabricated column based on an assembled structure and a connection method are provided.
[0028] The present invention is further described with reference to the accompanying drawings and specific embodiments. Figure 1-Figure 7As shown, according to one embodiment of the present invention, a UHPC embedded giant prefabricated column based on an assembled structure is provided, and the UHPC embedded giant prefabricated column includes a precast concrete foundation cap 1, a precast concrete column 2 is arranged at the top of the precast concrete foundation cap 1, a precast UHPC segment 3 matching the precast concrete foundation cap 1 is arranged on the outer side of the bottom of the precast concrete column 2, and a steel bar channel 4 matching the precast concrete column 2 is opened at the top of the precast UHPC segment 3; the precast concrete foundation cap 1 is connected to the precast concrete column 2 through a grouting joint 5, and a plurality of steel strands 6 penetrating the precast concrete column 2 and matching the precast UHPC segment 3 are evenly arranged inside the precast concrete foundation cap 1, one end of the steel strand 6 is provided with a steel strand anchor 7 matching the precast UHPC segment 3, and the other end of the steel strand 6 is vertically pre-buried in the middle of the precast concrete foundation cap 1; a plurality of energy dissipation rods 8 matching the precast concrete foundation cap 1 are evenly arranged on the outer side of the bottom of the precast concrete column 2.
[0029] Furthermore, the precast UHPC segment 3 includes an annular concrete shell 9 arranged on the outside of the middle of the precast concrete column 2, and a plurality of side openings 10 cooperating with the steel strands 6 and the steel strand anchors 7 are provided on the outside of the annular concrete shell 9, and hollow UHPC legs 11 penetrating the precast concrete column 2 and cooperating with the precast concrete foundation cap 1 are provided inside the side openings 10.
[0030] Furthermore, the part of the hollow UHPC leg 11 that passes through the precast concrete column 2 is perpendicular to the precast concrete foundation pedestal 1, and the hollow UHPC leg 11 located inside the annular concrete shell 9 is in an arc shape and is connected to the side opening 10; a steel strand hole 12 that matches the steel strand 6 is opened through the inner center of the hollow UHPC leg 11.
[0031] Furthermore, the precast concrete column 2 includes a reinforced concrete column 13 arranged on the top of the precast concrete foundation pedestal 1, and a plurality of energy dissipation rod connecting supports 14 matching with the energy dissipation rods 8 are evenly arranged on the outer side of the bottom of the reinforced concrete column 13.
[0032] Furthermore, a groove is reserved at the position where the precast concrete foundation cap 1 is connected to the steel strand 6, and the bottom end of the hollow UHPC leg 11 is in contact with the groove; the interior of the precast concrete foundation cap 1 is provided with longitudinal reinforcement and annular stirrups that keep a distance from the steel strand 6.
[0033] Furthermore, the cross-sectional size of the precast concrete column 2 is greater than 1 m×1 m.
[0034] Furthermore, annular stirrups are provided inside the prefabricated UHPC segment 3 , which are spaced apart from the steel bar duct 4 and the steel strand duct 12 .
[0035] Furthermore, a slurry outlet hole is provided at the end of the hollow UHPC leg 11; and a tape (slip tape, etc.) is wrapped on the surface of the steel strand 6.
[0036] It should be explained that the precast concrete foundation cap 1 also includes longitudinal reinforcement and annular stirrups. When designing, the steel strand 6 embedded in the middle of the precast concrete foundation cap 1 must avoid the position where the longitudinal reinforcement and the annular stirrups pass through; the precast UHPC segment 3 also includes longitudinal reinforcement and annular stirrups, and the reserved steel strand holes 12 and steel bar holes 4 are designed to avoid the position where the longitudinal reinforcement and the annular stirrups pass through; the precast concrete column 2 also includes longitudinal reinforcement and annular stirrups, and the reserved steel strand holes 12 are designed to avoid the position where the longitudinal reinforcement and the annular stirrups pass through. 2 must avoid the position where the longitudinal reinforcement and annular stirrups pass through; after the precast UHPC segment 3 is cast, the longitudinal reinforcement required by the precast concrete column 2 is arranged through the steel bar channel 4 reserved in the precast UHPC segment 3, and then stirrups are arranged as needed, the energy dissipation rod is pre-buried to connect the support 14, the template is built, and casting is carried out, and the precast concrete column 2 structure is formed; the energy dissipation rod 8 is composed of a sleeve and a core material, the core material is made of ordinary round rods, and the upper part is fixed to the precast concrete column 2 through the pre-buried energy dissipation rod connecting the support 14, with strong energy dissipation capacity, easy replacement and controllable cost.
[0037] Working principle of the present invention: like Figure 1-5 As shown: a steel strand 6 is embedded in the middle of the precast concrete foundation pedestal 1, and its length and cross-sectional area are reasonably calculated according to the deformation requirements of the steel strand 6; the opening volume of the precast UHPC segment 3 is designed by the equal strength of the ordinary cross-section of the precast concrete column 2 and the cross-section at the opening of the precast UHPC segment 3; a high-strength grouting joint 5 is set between the precast concrete foundation pedestal 1 and the precast concrete column 2 to fill the gap and provide sufficient bearing strength and bonding; the length and cross-sectional area of the energy dissipation rod 8 are calculated by the height of the compression zone when the column is destroyed, thereby further determining the embedded position of the energy dissipation rod connection support 14.
[0038] According to another embodiment of the present invention, Figure 8 As shown, a connection method of UHPC embedded giant prefabricated columns based on an assembled structure is also provided, and the connection method includes the following steps: S1, based on the pre-configured horizontal reinforcement of the prefabricated UHPC segment 3, a UHPC segment frame of annular concrete shell 9 and hollow UHPC legs 11 is constructed, and space for a reinforcement channel 4, a side opening 10 and a steel strand channel 12 is reserved in the UHPC segment frame; S2. Pour UHPC (ultra-high performance concrete) into the completed UHPC segment frame and perform maintenance; S3, based on the cast UHPC segment frame, longitudinal reinforcement and horizontal reinforcement of the precast concrete column 2 are arranged, wherein the longitudinal reinforcement passes through the reinforcement hole 4 and is connected by grouting material; S4, based on the longitudinal and horizontal reinforcements of the precast concrete column 2, a concrete column frame is constructed, and energy-absorbing rods are pre-embedded on the outside of the concrete column frame to connect the support 14, and ordinary concrete is poured into the constructed concrete column frame, and then maintained; S5, assembling the prefabricated concrete column and the prefabricated concrete foundation cap 1; Furthermore, assembling the prefabricated concrete column with the prefabricated concrete foundation cap 1 comprises the following steps: S51, pre-embedding the precast concrete foundation cap 1 to a pre-set position; S52, hoisting the concrete column, passing the steel strand 6 embedded in the precast concrete foundation cap 1 through the steel strand hole 12 in the concrete column; S53, placing the hollow UHPC leg 11 in the reserved groove of the precast concrete foundation cap 1 to complete the assembly of the concrete column and the precast concrete foundation cap 1; S6, the gap between the precast concrete foundation cap 1 and the concrete column is sealed around the perimeter by using the seat grout, and the inside of the precast concrete foundation cap 1 and the concrete column and the steel strand duct 12 are grouted and cured by grouting the side opening 10; S7, stretching the steel strand 6, and filling the side opening 10 with a plugging material; S8. Install the energy dissipation rod 8 based on the energy dissipation rod connection support 14, and complete the prefabricated pile connection.
[0039] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.
[0040] In summary, with the help of the above technical scheme of the present invention, the prefabricated structural column and the prefabricated concrete foundation pedestal 1 dissipate energy through the steel strands 6 and the energy dissipation rods 8 under the action of an earthquake. The steel strands 6 are wrapped with sliding tapes and are not bonded to the grouting material. They can be tensioned after grouting to form non-bonded prestress. The column foot has strong bending bearing capacity, good node deformation and self-recovery ability, strong energy dissipation capacity, high seismic performance, and strong anti-collapse ability. A groove is set at the connection joint between the prefabricated structural column and the prefabricated concrete foundation pedestal 1, and the UHPC legs are embedded. The shear resistance at the joint is strong and the structural integrity is good. The steel strands 6 are set in the prefabricated UHPC section 3. The UHPC has ultra-high performance and can effectively withstand the concentrated force at the prestressed anchorage, ensure safety, and simplify the structural form of the anchorage. At the same time, the weakening effect of the anchor groove on the cross-sectional bearing capacity is offset, which can ensure the high bearing capacity of large prefabricated columns. The safety of locally setting prestressing for large columns is realized; a local prestressing connection is set in the column foot area, and the steel strand 6 is softer when not prestressed, and has strong adaptability to the deviation of the channel, and the shorter length makes it easier to penetrate the steel strand channel 12, which reduces the construction difficulty, improves the construction efficiency, and shortens the construction period. Compared with conventional large prefabricated column feet, it has cost advantages; the hollow UHPC legs 11 set in the prefabricated UHPC section 3, the steel strand channel 12 are all set in the UHPC, and the prefabricated UHPC section 3 is prefabricated in advance, which is conducive to the positioning of the steel strand channel 12, avoiding the problem of difficult positioning and fixing of the conventional steel strand channel 12 in the steel cage, and reducing the manufacturing difficulty of large prefabricated columns; this node is used in single-column elevated stations, bridge piers and other locations, and the size of the large prefabricated column can effectively ensure the size space of the steel strand anchor 7, while not affecting the beautiful appearance, and has a good application prospect.
[0041] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A UHPC embedded giant prefabricated column based on an assembled structure, the UHPC embedded giant prefabricated column comprising a prefabricated concrete foundation cap (1), characterized in that: A precast concrete column (2) is arranged at the top of the precast concrete foundation pedestal (1); a precast UHPC segment (3) matching the precast concrete foundation pedestal (1) is arranged on the outer side of the bottom of the precast concrete column (2); and a steel bar channel (4) matching the precast concrete column (2) is opened at the top of the precast UHPC segment (3); The precast concrete foundation cap (1) is connected to the precast concrete column (2) via a grouting joint (5); a plurality of steel strands (6) penetrating the precast concrete column (2) and cooperating with the precast UHPC section (3) are evenly arranged inside the precast concrete foundation cap (1); one end of each steel strand (6) is provided with a steel strand anchor (7) cooperating with the precast UHPC section (3); and the other end of each steel strand (6) is vertically pre-buried in the middle of the precast concrete foundation cap (1); A plurality of energy-absorbing rods (8) matching the precast concrete foundation pedestal (1) are evenly arranged on the outer side of the bottom of the precast concrete column (2).
2. The UHPC embedded giant prefabricated column based on the assembled structure according to claim 1 is characterized in that: The precast UHPC section (3) comprises an annular concrete shell (9) arranged outside the middle of the precast concrete column (2), a plurality of side openings (10) cooperating with the steel strands (6) and the steel strand anchors (7) are provided on the outside of the annular concrete shell (9), and hollow UHPC legs (11) penetrating the precast concrete column (2) and cooperating with the precast concrete foundation pedestal (1) are provided inside the side openings (10).
3. The UHPC embedded giant prefabricated column based on the assembled structure according to claim 2 is characterized in that: The portion of the hollow UHPC leg (11) that passes through the precast concrete column (2) is perpendicular to the precast concrete foundation cap (1); the hollow UHPC leg (11) is located inside the annular concrete shell (9) in an arc shape and is connected to the side opening (10); A steel strand hole (12) matching the steel strand (6) is provided through the inner center of each of the hollow UHPC legs (11).
4. The UHPC embedded giant prefabricated column based on the assembled structure according to claim 3 is characterized in that: The precast concrete column (2) comprises a reinforced concrete column (13) arranged at the top of the precast concrete foundation pedestal (1), and a plurality of energy dissipation rod connection supports (14) matching the energy dissipation rods (8) are evenly arranged on the outside of the bottom of the reinforced concrete column (13).
5. The UHPC embedded giant prefabricated column based on the assembled structure according to claim 4 is characterized in that: A groove is reserved at the location where the precast concrete foundation cap (1) and the steel strand (6) meet, and the bottom end of the hollow UHPC leg (11) contacts the groove; The interior of the precast concrete foundation cap (1) is provided with longitudinal reinforcement and annular stirrups which are kept at a distance from the steel strand (6).
6. The UHPC embedded giant prefabricated column based on the assembled structure according to claim 5 is characterized in that: The cross-sectional dimensions of the prefabricated concrete column (2) are greater than 1m×1m.
7. The UHPC embedded giant prefabricated column based on the assembled structure according to claim 6 is characterized in that: The prefabricated UHPC segment (3) is provided with annular stirrups which are spaced apart from the steel bar hole (4) and the steel strand hole (12).
8. The UHPC embedded giant prefabricated column based on the assembled structure according to claim 7 is characterized in that: The end of the hollow UHPC leg (11) is provided with a slurry outlet hole; The surface of the steel strand (6) is wrapped with adhesive tape.
9. A method for connecting UHPC embedded giant prefabricated columns based on an assembled structure, used for connecting the UHPC embedded giant prefabricated columns based on an assembled structure as claimed in any one of claims 1 to 8, characterized in that: The connection method includes the following steps: S1. Based on the pre-configured horizontal reinforcement of the prefabricated UHPC segment (3), a UHPC segment frame of the annular concrete shell (9) and the hollow UHPC legs (11) is constructed, and space for the reinforcement channel (4), the side opening (10) and the strand channel (12) is reserved in the UHPC segment frame; S2. Cast UHPC on the completed UHPC segment frame and perform maintenance; S3, based on the cast UHPC segment frame, arranging the longitudinal reinforcement and horizontal reinforcement of the precast concrete column (2), wherein the longitudinal reinforcement passes through the reinforcement hole (4) and is connected by grouting material; S4, constructing a concrete column frame based on the longitudinal reinforcement and horizontal reinforcement of the precast concrete column (2), pre-embedding the energy dissipation rod connection support (14) on the outside of the concrete column frame, pouring ordinary concrete on the constructed concrete column frame, and performing curing; S5, assembling the prefabricated concrete column and the prefabricated concrete foundation cap (1); S6, using a grout to seal the gap between the precast concrete foundation pedestal (1) and the concrete column, and grouting the side opening (10) to irrigate and maintain the interior of the precast concrete foundation pedestal (1) and the concrete column and the steel strand duct (12); S7, stretching the steel strand (6) and filling the side opening (10) with a plugging material; S8, installing the energy dissipation rod (8) based on the energy dissipation rod connection support (14), and completing the prefabricated pile connection.
10. The method for connecting UHPC embedded giant prefabricated columns based on an assembled structure according to claim 9, characterized in that: The assembling of the prefabricated concrete column and the prefabricated concrete foundation cap (1) comprises the following steps: S51, pre-embedding the precast concrete foundation cap (1) to a predetermined position; S52, hoisting the concrete column, passing the steel strand (6) embedded in the precast concrete foundation pedestal (1) through the steel strand hole (12) in the concrete column; S53, placing the hollow UHPC leg (11) in the reserved groove of the precast concrete foundation pedestal (1) to complete the assembly of the concrete column and the precast concrete foundation pedestal (1).