A prefabricated RC pipe column with recovery function and its construction method

Abstract

The present invention discloses a prefabricated assembled RC pipe column with a recovery function and a construction method thereof. The present invention uses unbonded prestressed tendons and longitudinal steel bars to vertically integrate the RC pipe column body and the pipe column foundation, further enhancing the shear bearing capacity, connection strength and overall stiffness between the RC pipe column body and the pipe column foundation, and uses high-strength steel bars to connect the bent components, the RC pipe column body and the pipe column foundation to prevent the connection from being damaged first. The reinforced concrete protective component yields first under the action of an earthquake, while releasing the energy of the RC pipe column body under the action of the earthquake in the entire system. Under the action of an earthquake, the prefabricated assembled RC pipe column will swing, and the plastic hinge phenomenon caused by the destruction of cast-in-place reinforced concrete columns will not occur. After the earthquake, the prestressed tendons in the prefabricated assembled RC pipe column are self-reset, so that the prefabricated assembled RC pipe column provided by the present invention can achieve the recoverability function after the earthquake.

Description

Technical Field

[0001] The invention belongs to the technical field of prefabricated and assembled structural engineering construction, and relates to a prefabricated and assembled RC pipe column with a recovery function and a construction method thereof. Background Art

[0002] With the vigorous development of my country's national economy and construction industry, the design and construction of buildings are undergoing significant changes. Lightweight, high-strength, high-performance, and efficient construction systems have become a major trend in the construction industry. Against this backdrop, lightweight, high-strength, and low-carbon building structures have become urgent needs in current construction projects, and have also promoted the development of structural diversity. Under this trend, traditional solid column structures can no longer meet the requirements of complex engineering projects in some cases. Relatively speaking, lightweight and high-strength RC tubular columns, as a new structural system, have the characteristics of light weight, small foundation loads, and material savings. Compared with traditional solid columns, they exhibit superior performance in bending and torsion resistance, and are therefore widely used in projects such as large bridges and urban transportation complexes.

[0003] In order to quickly restore the functional use of column structures after an earthquake, the academic community has proposed the concept of "recoverable functional earthquake-resistant structures." This structural system can restore its normal functional use after an earthquake without the need for large-scale repairs. It includes swing structures, self-resetting structures, and replaceable structures. On the other hand, in recent years, the construction model of large-scale engineering projects has also shifted from the traditional casting model to a more environmentally friendly and efficient green construction model. The synchronous prefabrication and assembly technology of building structures has flourished. However, in areas with high seismic risk, how to ensure that the structure has sufficient strength and rigidity to withstand earthquakes while being able to quickly restore its functional use after an earthquake remains an important issue that needs to be addressed.

[0004] In view of this, the present inventors provide a prefabricated assembled RC pipe column with a recovery function and a construction method thereof to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and propose a prefabricated and assembled RC pipe column with recovery function and its construction method. By utilizing prefabrication and assembly technology and the concept of seismic resistance of recoverable functional structures, the present invention solves the problem that traditional column structures have poor energy dissipation capacity and are difficult to restore for use after an earthquake, thereby meeting the complex needs of modern construction projects.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention provides a prefabricated RC pipe column with a recovery function, comprising an RC pipe column body and a pipe column base. The RC pipe column body is a hollow cylindrical structure with a set wall thickness, and the RC pipe column body is longitudinally installed on the upper part of the pipe column base.

[0008] Among them, a plurality of prestressed tendons inserted into the interior of the column base are evenly arranged along the circumferential direction in the tube cavity of the RC column body, close to the inner wall. Each of the prestressed tendons is detachably connected to the first steel plate provided on the top of the RC column body. A plurality of first longitudinal steel bars penetrating the RC column body are evenly arranged along the circumferential direction in the tube wall of the RC column body. A plurality of L-shaped reinforced concrete protective members are distributed along the circumferential direction on the upper part of the column base and outside the bottom of the RC column body. Each of the reinforced concrete protective members is fixed to the column body longitudinally by a connector and laterally to the column base by a connector to dissipate vibration energy.

[0009] Furthermore, the reinforced concrete protective member includes an L-shaped protective shell, bent steel bars located inside the L-shaped protective shell, and high-strength steel bars provided at both ends of the protective shell and connected to the RC pipe column body and the pipe column foundation respectively;

[0010] Among them, the reinforced concrete protective component is a prefabricated reinforced concrete structure, and the bent steel bars are ordinary steel bar materials.

[0011] Furthermore, the RC pipe column body is provided with a first straight thread sleeve mounting hole in the transverse direction for mounting the first straight thread sleeve, and the high-strength steel bar at one end of the reinforced concrete protective member away from the bend is transversely embedded in the first straight thread sleeve in the RC pipe column body;

[0012] A second straight threaded sleeve mounting hole is longitudinally opened on the pipe column foundation for installing the second straight threaded sleeve, and the high-strength steel bar at one end near the bend of the reinforced concrete protective component is longitudinally embedded in the second straight threaded sleeve in the pipe column foundation.

[0013] Furthermore, an insertion hole for inserting the first longitudinal steel bar is provided on the pipe column foundation, and a second longitudinal steel bar is also provided at the lower part of the insertion hole. At the same time, a grouting sleeve is provided between the first longitudinal steel bar and the second longitudinal steel bar for bonding the first longitudinal steel bar and the second longitudinal steel bar into one.

[0014] Furthermore, a first steel plate is provided on the top of the RC column body, and an L-shaped second steel plate is fixedly provided on the bottom;

[0015] A prestressed anchor for fixing prestressed tendons is provided on the top of the first steel plate, and the prestressed anchor is detachably connected to the first steel plate. The prestressed anchor and the prestressed tendons are coaxially arranged, and the prestressed tendons are inserted into the foundation pipe column through a prestressed channel provided in the pipe column foundation.

[0016] Furthermore, the RC pipe column body is a prefabricated reinforced concrete structure, the pipe column foundation is also a reinforced concrete structure, anchor steel bars are welded inside the first steel plate and the second steel plate, the prestressed tendons are unbonded low-relaxation prestressed tendons, and the prestressed duct is an unbonded PVC pipe.

[0017] Furthermore, the construction method is based on the prefabricated RC pipe column and includes the following steps:

[0018] S1: New prefabricated RC pipe column;

[0019] S2: After an earthquake occurs, determine whether the reinforced concrete protective components in the prefabricated RC pipe columns need to be replaced;

[0020] S3: If there is no need to replace the reinforced concrete protective components, no treatment will be performed; if necessary, the reinforced concrete protective components will be replaced.

[0021] Furthermore, the steps of constructing a new prefabricated RC pipe column are as follows:

[0022] S1-1: Set up prestressed channels inside the pipe column foundation, install grouting sleeves on the pipe column foundation, and install straight thread sleeves in the RC pipe column body and pipe column foundation;

[0023] S1-2: Insert the first longitudinal reinforcement of the prefabricated RC pipe column into the insertion hole of the pipe column foundation, insert the prestressed tendons into the prestressed channel, and anchor the prestressed tendons with prestressed anchors;

[0024] S1-3: A second steel plate is fixedly installed at the bottom of the RC pipe column body, and a first steel plate is detachably installed on both sides of the insertion hole at the top end of the pipe column foundation and at the top end of the RC pipe column body;

[0025] S1-4: Install the reinforced concrete protection component, and embed the high-strength steel bar at the end of the reinforced concrete protection component away from the bend into the first straight threaded sleeve of the RC pipe column body, and embed the high-strength steel bar at the end close to the bend into the second straight threaded sleeve of the pipe column foundation;

[0026] S1-5: Concrete the pipe column foundation through the grouting sleeve installed in the pipe column foundation.

[0027] Furthermore, the steps for replacing the reinforced concrete protective component of the prefabricated RC pipe column are as follows:

[0028] S3-1: Remove the high-strength steel bars connecting the reinforced concrete protection components to the column foundation, and then remove the reinforced concrete protection components that need to be replaced;

[0029] S3-2: Hoist the newly prefabricated reinforced concrete protective component and connect the RC pipe column body and the pipe column foundation through the first longitudinal steel bar, the second longitudinal steel bar and the grouting sleeve, and anchor the high-strength steel bars at the upper and lower parts of the reinforced concrete protective component.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention provides a prefabricated RC pipe column with a restorative function and a construction method thereof. Unbonded prestressed tendons are used to vertically integrate the RC pipe column body and the pipe column base. Grouting sleeves are used to connect the longitudinal reinforcement of the RC pipe column body and the pipe column base. The prefabricated RC pipe column has a swaying function as a whole structure, thereby reducing the damage to the prefabricated RC pipe column caused by earthquake-induced instability.

[0032] 2. The present invention provides a prefabricated RC pipe column with a recovery function and a construction method thereof. Removably mounted reinforced concrete protective components on the upper portion of the pipe column base and outside the RC pipe column body dissipate vibration energy. If severely damaged after an earthquake, the severely damaged reinforced concrete protective components can be removed and replaced. This allows the prefabricated RC pipe column to quickly recover after a strong earthquake, enabling replacement of damaged components. This addresses the problems of traditional prefabricated columns, such as poor energy dissipation and difficulty repairing post-earthquake damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the invention.

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 Schematic diagram of a vertical cross-section of a prefabricated RC pipe column with a recovery function according to the present invention;

[0036] Figure 2 Schematic diagram of the assembly of a prefabricated RC pipe column with a recovery function according to the present invention;

[0037] Figure 3 This is a schematic structural diagram of a reinforced concrete protective component of a prefabricated RC pipe column with a recovery function according to the present invention;

[0038] Figure 4 Schematic cross-sectional view of the internal structure of the reinforced concrete protective member of the prefabricated RC pipe column with recovery function of the present invention;

[0039] Figure 5 This is a schematic structural diagram of a grouting sleeve of a prefabricated RC pipe column with a recovery function according to the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the high-strength steel bars anchored to the bottom steel plate of the RC pipe column body of the prefabricated RC pipe column with recovery function of the present invention;

[0041] Among them: 1. RC pipe column body; 11. First straight thread sleeve installation hole; 2. Pipe column foundation; 21. Second straight thread sleeve installation hole; 22. Insertion hole; 23. Prestressed channel; 3. First steel plate; 4. Prestressed tendons; 5-1. First longitudinal reinforcement; 5-2. Second longitudinal reinforcement; 6. Reinforced concrete protective component; 61. Protective shell; 62. Bent reinforcement; 63. High-strength reinforcement; 64. High-strength bolts; 7. Grouting sleeve; 8. Prestressed anchor; 9. Second steel plate. DETAILED DESCRIPTION

[0042] Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples of devices consistent with some aspects of the present invention as detailed in the appended claims.

[0043] The present invention provides a prefabricated RC pipe column with recovery function, such as Figure 1-2 As shown, it includes an RC pipe column body 1, a pipe column foundation 2, a first steel plate 3, a prestressed tendon 4, a first longitudinal steel bar 5-1, a second longitudinal steel bar 5-2, a reinforced concrete protective member 6, a grouting sleeve 7, a prestressed anchor 8 and a second steel plate 9, wherein the RC pipe column body 1 and the reinforced concrete protective member 6 are reinforced concrete structures prefabricated in a factory, the RC pipe column body 1 also includes a first straight thread sleeve mounting hole 11, the pipe column foundation 2 is a cast-in-place structure, including a second straight thread sleeve mounting hole 21, an insertion hole 22 and a prestressed channel 23, the reinforced concrete steel protective member 6 includes a protective shell 61, a bent steel bar 62, a high-strength steel bar 63 and a high-strength bolt 64, and Figure 1 The vertical cross-section of the prefabricated RC pipe column is a symmetrical structure.

[0044] For the pipe column foundation 2, prestressed channels 23, second straight threaded sleeve mounting holes 21 and insertion holes 22 are reserved first. The RC pipe column body 1 and reinforced concrete protective component 6 are prefabricated in the factory in advance. During prefabrication, the formwork accuracy must be strictly controlled, especially the straight threaded sleeve mounting holes and the insertion holes. Factory prefabrication is the prerequisite for ensuring construction accuracy. It should be noted that steel plates with the same material and structure as the first steel plate 3 are provided on both sides of the insertion hole 22 set in the pipe column foundation 2.

[0045] When prefabricating the RC pipe column body 1, the first longitudinal steel bar 5-1 in the RC pipe column body 1 is extended out of the lower end of the RC pipe column body 1, and the extension length is strictly controlled so that it can be embedded with the insertion hole 22 in the pipe column foundation 2. A first straight thread sleeve mounting hole 11 opened horizontally is reserved on the RC pipe column body 1, and a second straight thread sleeve mounting hole 21 opened longitudinally is reserved on the pipe column foundation 2. At the same time, the position accuracy of the first straight thread sleeve mounting hole 11 and the second straight thread sleeve mounting hole 21 is strictly controlled so that they can be embedded with the high-strength steel bar 63 of the reinforced concrete protective member 6; a second L-shaped steel plate 9 is embedded at the connection between the RC pipe column body 1 and the pipe column foundation 2, the connection between the RC pipe column body 1 and the reinforced concrete protective member 6, and the top of the RC pipe column body 1. The second steel plate 9 can be cast together with the RC pipe column body 1, so that the second steel plate 9 is fixedly installed on the RC pipe column body 1 to ensure the integrity of the structure. At the same time, anchor holes are reserved on the second steel plate 9 for accurate anchoring with the first straight threaded sleeve, the grouting sleeve 7 and the first longitudinal steel bar 5-1. The first steel plate 3 is set on the top of the RC pipe column body 1 with a hollow cylindrical structure of a set wall thickness, and anchor holes are reserved on the first steel plate 3 at the top of the RC pipe column body 1 for anchoring the prestressed tendons 4. Then, the prestressed tendons 4 are anchored in the anchor holes of the first steel plate 3 at the top of the RC pipe column body 1 through the prestressed anchor 8. A grouting sleeve 7 is pre-buried inside the pipe column foundation 2 and at the lower end of the insertion hole 22. Preferably, the grouting sleeve 7 is Figure 5 The illustrated bonded, fully grouted shear nail sleeves are grouted and fixed to the first longitudinal reinforcement bars 5-1 extending from the RC pipe column body 1 and the second longitudinal reinforcement bars 5-2 disposed within the pipe column foundation 2 through the grouting sleeves 7. The bonding effect of the grouting sleeves 7 ensures continuity between the first longitudinal reinforcement bars 5-1 and the second longitudinal reinforcement bars 5-2 between the RC pipe column body 1 and the pipe column foundation 2, enabling the RC pipe column body 1 and the pipe column foundation 2 to form an integral structure while maintaining a certain connection strength. Furthermore, a joint is formed at the contact surface between the RC pipe column body 1 and the pipe column foundation 2, allowing the prefabricated RC pipe column to sway, thereby dissipating some of the vibration energy generated by an earthquake.

[0046] The reinforced concrete protective component 6 is an L-shaped bent structure. When the reinforced concrete protective component 6 is prefabricated, the bent steel bars 62 are installed in the protective shell 61 of the reinforced concrete protective component 6, and high-strength steel bar insertion holes are preset at both ends of the protective shell 61. Then, the high-strength steel bars 63 are inserted into the high-strength steel bar insertion holes at both ends of the protective shell 61, and the high-strength steel bars 63 are fixed to the protective shell 61 using high-strength bolts 64. Specifically, the high-strength steel bars 63 near one end of the RC pipe column body 1 are horizontally embedded in the first straight threaded sleeve in the RC pipe column body 1, and the high-strength steel bars 63 near one end of the pipe column foundation 2 are longitudinally embedded in the second straight threaded sleeve in the RC pipe column body 1.

[0047] After the RC column body 1 and the reinforced concrete protection member 6 are prefabricated, they are transported to the construction site for assembly. Figure 2 As shown, the first straight thread sleeve is installed in the first straight thread sleeve installation hole 11 of the RC pipe column body 1, and the second straight thread sleeve is installed in the second straight thread sleeve installation hole 21 on the pipe column foundation 2. The high-strength steel bar 63 at the end of the reinforced concrete protective member 6 away from the bend is installed in the first straight thread sleeve on the RC pipe column body 1. Then, the first longitudinal steel bar 5 extending from the RC pipe column body 1 is aligned with the insertion hole 22 provided on the pipe column foundation 2, the prestressed bar 4 is aligned with the prestressed channel 23 provided on the pipe column foundation 2, and the high-strength steel bar 63 at the end of the reinforced concrete protective member 6 near the bend is aligned with the second straight thread sleeve in the pipe column foundation 2. Then, the components are plugged in and engaged according to the alignment.

[0048] Preferably, the RC pipe column body 1 and the reinforced concrete protective member 6 provided by the present invention are both prefabricated reinforced concrete structures, the pipe column foundation 2 is a reinforced concrete structure, the first steel plate 3 and the second steel plate 9 are welded with anchor steel bars, the prestressed tendons 4 are unbonded low-relaxation prestressed tendons, and the prestressed tendons 4 can be provided in multiple groups. In this application, the number of prestressed tendons 4 is set to 4 groups, the grouting sleeve 7 is a bonded reinforced full grouting sleeve with shear nails, the bent steel bars 62 are ordinary steel bars, and the prestressed duct 23 is an unbonded PVC pipe.

[0049] The present invention also provides a construction method for a prefabricated RC pipe column with a recovery function. The specific construction process is as follows:

[0050] Step 1: Build a prefabricated RC pipe column.

[0051] S1-1: A prestressed channel 23 is provided inside the pipe column foundation 2, and a grouting sleeve 7 is pre-set on the pipe column foundation 2. Then, a first straight threaded sleeve is installed in a first straight threaded sleeve mounting hole 11 provided transversely in the RC pipe column body 1, and a second straight threaded sleeve is installed in a second straight threaded sleeve mounting hole 21 provided longitudinally in the pipe column foundation 2;

[0052] S1-2: Insert the extended portion of the first longitudinal reinforcement 5-1 in the prefabricated RC pipe column into the insertion hole 22 of the pipe column foundation 2, and insert the prestressed tendon 4 into the prestressed channel 23. Then, tension the prestressed tendon 4 at the upper end of the RC pipe column and anchor it using the prestressed anchor 8.

[0053] S1-3: A first steel plate 3 is detachably installed on both sides of the insertion hole 22 at the top of the RC column body 1 and the top of the inner top of the column base 2. A second L-shaped steel plate 9 is fixedly installed at the connection between the bottom of the RC column body 1 and the column base 2, and at the connection between the RC column body 1 and the reinforced concrete protective member 6.

[0054] S1-4: Install the high-strength steel bar 63 at the end of the reinforced concrete protective member 6 away from the bend into the first straight threaded sleeve of the RC pipe column body 1, and install the high-strength steel bar 63 at the end close to the bend into the second straight threaded sleeve of the pipe column foundation 2, completing the installation of the reinforced concrete protective member 6;

[0055] S1-5: Concrete is poured on the first longitudinal reinforcement 5-1 extending from the RC column body 1 and the second longitudinal reinforcement 5-2 in the column base 2 through the grouting sleeve 7 installed in the column base 2, thereby forming the RC column body 1 and the column base 3 into an integral structure.

[0056] S2: After an earthquake occurs, determine whether the reinforced concrete protective component 6 of the prefabricated RC pipe column needs to be replaced.

[0057] The situations in which the reinforced concrete protective member 6 needs to be replaced are as follows:

[0058] (1) After an earthquake, small, inconspicuous cracks may appear on the reinforced concrete protective member 6, which is a normal phenomenon. However, when large, obvious cracks appear on the reinforced concrete protective member 6, which affects the strength and stability of the reinforced concrete protective member 6, the reinforced concrete protective member 6 needs to be replaced;

[0059] (2) When the reinforced concrete protective member 6 is bent or twisted, it indicates that it is greatly affected by external forces and may lose the function of the structure itself, thus causing safety problems. The reinforced concrete protective member 6 needs to be replaced;

[0060] (3) When the reinforced concrete protective member 6 has been in use for a long time and corrosion occurs, especially when the load-bearing structure is corroded, the reinforced concrete protective member 6 needs to be replaced in order to prevent the load-bearing function and earthquake resistance of the structure from being weakened or the structure from collapsing;

[0061] (4) When the reinforced concrete protective member 6 fails, for example, the concrete strength decreases significantly, thereby affecting the connection between the structures and thus affecting the seismic resistance of the reinforced concrete protective member, the reinforced concrete protective member 6 needs to be replaced;

[0062] (5) When the reinforced concrete protective member 6 is subjected to repeated loading, fatigue of the reinforced concrete protective member 6 may occur, resulting in cracks and deformation of the reinforced concrete protective member 6, thereby affecting the performance, and the reinforced concrete protective member 6 needs to be replaced;

[0063] (6) When the reinforced concrete protection member 6 undergoes a large displacement, it indicates that there is a major problem with the reinforced concrete protection member 6 or the connecting parts, and the reinforced concrete protection member 6 needs to be replaced.

[0064] S3: If the reinforced concrete protective component 6 does not need to be replaced, no processing is performed; if necessary, the reinforced concrete protective component 6 of the prefabricated RC pipe column is replaced.

[0065] S3-1: Remove the high-strength steel bars 63 connecting the reinforced concrete protection member 6 and the pipe column foundation 2, and then remove the reinforced concrete protection member 6 that needs to be replaced;

[0066] S3-2: The newly prefabricated reinforced concrete protective member 6 is hoisted and lowered. The RC pipe column body 1 and the pipe column foundation 2 are connected by the high-strength steel bars 63 at both ends of the reinforced concrete protective member 6 and the first and second straight threaded sleeves respectively. The high-strength steel bars 63 at both ends of the reinforced concrete protective member 9 are anchored with high-strength bolts 64, thereby completing the replacement of the reinforced concrete protective member 6.

[0067] The prefabricated RC pipe column with a recovery function provided by the present invention is based on the basic requirements of recoverability. It uses unbonded prestressed tendons to vertically integrate the RC pipe column body and the pipe column foundation. Grouting sleeves are used to connect the RC pipe column body and the pipe column foundation via longitudinal reinforcement, further enhancing the shear bearing capacity, connection strength, and overall rigidity between the RC pipe column body and the pipe column foundation. High-strength reinforcement is used to connect the bent components, the RC pipe column body, and the pipe column foundation to prevent the joints from failing first. The reinforced concrete protective component yields first under earthquake action, simultaneously releasing the energy received by the RC pipe column body under the earthquake action on the entire system. As a result, under earthquake action, the prefabricated RC pipe column will sway, without the plastic hinge phenomenon that occurs when cast-in-place reinforced concrete columns fail. After the earthquake, the prestressed tendons in the prefabricated RC pipe column self-reset, thereby enabling the prefabricated RC pipe column provided by the present invention to achieve post-earthquake recoverability.

[0068] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0069] It should be understood that the present invention is not limited to the above description and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A prefabricated RC pipe column with recovery function, characterized in that: It comprises an RC pipe column body (1) and a pipe column foundation (2), wherein the RC pipe column body (1) is a hollow column structure with a set wall thickness, and the RC pipe column body (1) is longitudinally installed on the upper part of the pipe column foundation (2); wherein, a plurality of prestressed tendons (4) inserted into the column base (2) are uniformly arranged in the circumferential direction in the tube cavity of the RC column body (1) and close to the inner wall thereof, each of the prestressed tendons (4) being detachably connected to a first steel plate (3) arranged at the top of the RC column body (1); a plurality of first longitudinal steel bars (5-1) penetrating the RC column body (1) are uniformly arranged in the circumferential direction in the tube wall of the RC column body (1); and a plurality of L-shaped detachable reinforced concrete protective components (6) are distributed in the circumferential direction on the upper part of the column base (2) and outside the bottom of the RC column body (1); each of the reinforced concrete protective components (6) is transversely fixed to the RC column body (1) in the longitudinal direction by a connecting piece, and is longitudinally fixed to the column base (2) in the transverse direction by a connecting piece, for consuming vibration energy; The reinforced concrete protective member (6) is a prefabricated reinforced concrete structure; An insertion hole (22) for inserting a first longitudinal steel bar (5-1) is provided on the pipe column foundation (2), and a second longitudinal steel bar (5-2) is provided below the insertion hole (22). A grouting sleeve (7) is provided between the first longitudinal steel bar (5-1) and the second longitudinal steel bar (5-2) for bonding the first longitudinal steel bar (5-1) and the second longitudinal steel bar (5-2) into one body. The unbonded prestressed tendons (4) are used to vertically integrate the RC pipe column body (1) and the pipe column foundation (2), and the longitudinal reinforcement of the RC pipe column body (1) and the pipe column foundation (2) are connected by a grouting sleeve (7). The sway function of the prefabricated RC pipe column overall structure is used to reduce the degree of damage to the prefabricated RC pipe column caused by instability caused by earthquakes; The reinforced concrete protective component (6) comprises an L-shaped protective shell (61), bent steel bars (62) located inside the L-shaped protective shell (61), and high-strength steel bars (63) arranged at both ends of the protective shell (61) and connected to the RC pipe column body (1) and the pipe column foundation (2), respectively.

2. The prefabricated RC pipe column with recovery function according to claim 1, characterized in that: The bent steel bars (62) are made of ordinary steel bar material.

3. The prefabricated RC pipe column with recovery function according to claim 2, characterized in that: The RC pipe column body (1) is provided with a first straight thread sleeve mounting hole (11) in the transverse direction for mounting the first straight thread sleeve, and the high-strength steel bar (63) at one end of the reinforced concrete protective component (6) away from the bend is transversely embedded in the first straight thread sleeve in the RC pipe column body (1); A second straight threaded sleeve mounting hole (21) is longitudinally opened on the pipe column foundation (2) for mounting a second straight threaded sleeve, and a high-strength steel bar (63) at one end of the reinforced concrete protective component (6) near the bend is longitudinally embedded in the second straight threaded sleeve in the pipe column foundation (2).

4. The prefabricated RC pipe column with recovery function according to claim 1, characterized in that: A first steel plate (3) is provided on the top of the RC column body (1), and an L-shaped second steel plate (9) is fixedly provided on the bottom; A prestressed anchor (8) for fixing the prestressed tendon (4) is provided on the top of the first steel plate (3), and the prestressed anchor (8) and the first steel plate (3) are detachably connected. The prestressed anchor (8) and the prestressed tendon (4) are coaxially arranged, and the prestressed tendon (4) is inserted into the pipe column foundation (2) through a prestressed channel (23) provided in the pipe column foundation (2).

5. The prefabricated RC pipe column with recovery function according to claim 4, characterized in that: The RC pipe column body (1) is a prefabricated reinforced concrete structure, the pipe column foundation (2) is also a reinforced concrete structure, anchor steel bars are welded inside the first steel plate (3) and the second steel plate (9), the prestressed tendons (4) are unbonded low-relaxation prestressed tendons, and the prestressed duct (23) is an unbonded PVC pipe.

6. A construction method for a prefabricated RC pipe column with a recovery function, characterized in that: The construction method is based on the prefabricated RC pipe column with recovery function described in any one of claims 1 to 5, comprising the following steps: S1: New prefabricated RC pipe column; S2: After an earthquake occurs, determine whether the reinforced concrete protective component (6) in the prefabricated RC pipe column needs to be replaced; S3: If the reinforced concrete protective component (6) does not need to be replaced, no treatment is performed; if necessary, the reinforced concrete protective component (6) is replaced.

7. The construction method of the prefabricated RC pipe column with recovery function according to claim 6, characterized in that: The steps of constructing a new prefabricated RC pipe column are as follows: S1-1: a prestressed duct (23) is provided inside the pipe column foundation (2), and a grouting sleeve (7) is installed and placed on the pipe column foundation (2); a first straight thread sleeve installation hole (11) is opened in the transverse direction on the RC pipe column body (1) for installing the first straight thread sleeve; a second straight thread sleeve installation hole (21) is opened in the longitudinal direction on the pipe column foundation (2) for installing the second straight thread sleeve; S1-2: inserting the first longitudinal steel bar (5-1) in the prefabricated RC pipe column into the insertion hole (22) of the pipe column foundation (2), inserting the prestressed tendon (4) into the prestressed hole (23), and anchoring the prestressed tendon (4) through the prestressed anchor (8); S1-3: A second steel plate (9) is fixedly installed at the bottom of the RC column body (1), and a first steel plate (3) is detachably installed on both sides of the insertion hole (22) at the top end of the column base (2) and at the top end of the RC column body (1); S1-4: Install the reinforced concrete protection member (6), and embed the high-strength steel bar (63) at the end of the reinforced concrete protection member (6) away from the bend into the first straight threaded sleeve of the RC pipe column body (1), and embed the high-strength steel bar (63) at the end close to the bend into the second straight threaded sleeve of the pipe column foundation (2); S1-5: Concrete is poured on the pipe column foundation (2) through the grouting sleeve (7) installed in the pipe column foundation (2).

8. The construction method of the prefabricated RC pipe column with recovery function according to claim 6, characterized in that: The steps for replacing the reinforced concrete protective component (6) of the prefabricated RC pipe column are as follows: S3-1: Remove the high-strength steel bars (63) connecting the reinforced concrete protection member (6) and the pipe column foundation (2), and then remove the reinforced concrete protection member (6) that needs to be replaced; S3-2: The newly prefabricated reinforced concrete protective member (6) is hoisted and placed, and the RC pipe column body (1) and the pipe column foundation (2) are connected through the first longitudinal reinforcement (5-1), the second longitudinal reinforcement (5-2) and the grouting sleeve (7), and the high-strength reinforcement (63) at the upper and lower parts of the reinforced concrete protective member (6) are anchored.

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