Additional column foot structure suitable for TOD project

Abstract

The utility model discloses an additionally-built column foot structure suitable for a TOD project. The first cast-in-place pier column is arranged at the top of the existing building, the multiple first vertical longitudinal steel bars penetrate through the bottom of the first cast-in-place pier column and are implanted into the existing building, and a rectangular frame structure is defined by the multiple first vertical longitudinal steel bars; one end of each column foot anchor bolt penetrates through a bottom plate of the newly-added building column foot and extends into the first cast-in-place pier column, and the bottom plate is located above leveling nuts of the column foot anchor bolts; a gap is formed between the end, away from the existing building, of the first cast-in-place pier column and the bottom plate. The leveling layer is arranged in the gap; the second cast-in-place pier column is arranged at the end, away from the existing building, of the first cast-in-place pier column, and the studs and the leveling layer of the newly-added building column foot are located in the second cast-in-place pier column. Therefore, according to the embodiment of the invention, column foot embedded steel bars of the newly-added building are reduced, the influence of the newly-added building on the existing building is reduced, column foot anchor bolt presetting is facilitated, and economy and reliability are achieved.

Description

Technical Field

[0001] The present application relates to the field of construction technology, and in particular to an additional column base structure suitable for TOD projects. Background Art

[0002] The TOD project, or "Transit-Oriented Development" project, is an urban planning model whose core concept is to carry out high-density, mixed-use urban development around public transportation stations, thereby promoting walking, cycling and the use of public transportation, reducing dependence on private cars, thereby alleviating urban congestion, reducing air pollution, and promoting sustainable development.

[0003] The TOD project is to add a new building on top of the existing building below. The new building usually adopts reinforced concrete structure or steel structure.

[0004] Currently, when installing column bases of reinforced concrete structures or steel structures, a large amount of steel bars are usually implanted on the top of the existing building. A large amount of steel bars will destroy the original structure of the existing building, which is not only inconvenient for construction but also has high construction costs. Utility Model Content

[0005] The embodiment of the present application solves the technical problem in the prior art that when installing the column base of a reinforced concrete structure or a steel structure, a large amount of steel bars need to be implanted, which easily damages the original structure of the existing building by providing an additional column base structure suitable for TOD projects.

[0006] The embodiment of the present application provides an additional column base structure suitable for TOD projects, including a first cast-in-place pier, a second cast-in-place pier, a leveling layer, a plurality of column base anchor bolts, a plurality of first vertical longitudinal steel bars and a plurality of second vertical longitudinal steel bars; the first cast-in-place pier is arranged on the top of the existing building, the plurality of first vertical longitudinal steel bars all pass through the bottom of the first cast-in-place pier and are implanted into the interior of the existing building, the plurality of first vertical longitudinal steel bars are enclosed to form a rectangular frame structure, and are close to the outer wall of the first cast-in-place pier; one end of the plurality of column base anchor bolts all pass through the bottom plate of the newly added building column base and extend into the first cast-in-place pier, the bottom plate The plate is located above the leveling nut of the column foot anchor bolt; a gap is formed between the end of the first cast-in-place pier column away from the existing building and the base plate; the leveling layer is arranged in the gap, and the projection of the base plate on the horizontal plane is located within the projection of the leveling layer on the horizontal plane; the second cast-in-place pier column is arranged at the end of the first cast-in-place pier column away from the existing building, and the bolts of the newly added building column foot and the leveling layer are both located inside the second cast-in-place pier column; multiple second vertical longitudinal steel bars are all connected to the first cast-in-place pier column, and the multiple second vertical longitudinal steel bars are enclosed to form a rectangular frame structure, and are close to the outer wall of the second cast-in-place pier column.

[0007] In one possible implementation, the additional column base structure suitable for TOD projects also includes multiple double nuts; the multiple double nuts are respectively arranged on the side of the column base anchor away from the first cast-in-place pier, and are located on the side of the base plate away from the leveling nut of the column base anchor.

[0008] In a possible implementation, the longitudinal section of the leveling layer is trapezoidal, and the length of the upper base of the trapezoid is equal to the length of the bottom plate.

[0009] In one possible implementation, the additional column base structure suitable for TOD projects also includes a plurality of top reinforcing stirrups; the plurality of top reinforcing stirrups are arranged circumferentially on the side of the second vertical longitudinal steel bar away from the first cast-in-place pier column, and are spaced apart along the height direction of the second vertical longitudinal steel bar.

[0010] In a possible implementation, a projection of a cross section of the first cast-in-situ pier column coincides with a projection of a cross section of the second cast-in-situ pier column.

[0011] In a possible implementation, the column base anchor bolt is an L-shaped structure.

[0012] In a possible implementation, the leveling layer has a height of 50 mm and is a non-shrinkage concrete structure.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects:

[0014] The additional column base structure suitable for TOD projects provided in the embodiment of the present application includes a first cast-in-place pier, a second cast-in-place pier, a leveling layer, a plurality of column base anchor bolts, a plurality of first vertical longitudinal steel bars and a plurality of second vertical longitudinal steel bars. The first vertical longitudinal steel bars of the present application are enclosed to form a rectangular frame structure, and are implanted in the existing building in small quantities, so that their impact on the original structure of the existing building is minimized, the structural construction is simplified, and the first cast-in-place pier and the existing building are reliably connected. The first cast-in-place pier of the present application forms a gap with the base plate, and after the base plate is leveled by the leveling nut, concrete is poured to form a leveling layer. The first cast-in-place pier and the second cast-in-place pier of the present application outsource the newly added building column base, which reduces the self-weight of the newly added building structure and is beneficial to the control of the load of the existing building structure. The present application realizes the burial of the newly added building column base by positioning the column base anchor bolts and forming the second cast-in-place pier formed by the third pouring. Therefore, the added column base structure suitable for TOD projects in the embodiment of the present application reduces the embedded reinforcement of the column base of the new building, simplifies the structural construction, reduces the impact of the new building on the existing building, and facilitates the pre-setting of the column base anchor bolts. The design and layout are simple, economical and reliable, and easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic diagram of the structure of an additional column base structure applicable to a TOD project provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 Sectional view of the AA plane;

[0018] Figure 3 for Figure 1 Cross-sectional view of the middle BB surface;

[0019] Figure 4 This is a schematic structural diagram of the column base anchor bolt provided in an embodiment of the present application.

[0020] Figure markings: 1-first cast-in-place pier; 2-second cast-in-place pier; 3-leveling layer; 4-column base anchor bolt; 41-leveling nut; 5-double nut; 6-new building column base; 7-base plate; 8-existing building; 9-first vertical longitudinal reinforcement; 10-second vertical longitudinal reinforcement; 11-top reinforcement stirrup. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] In the description of the embodiments of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0023] The embodiment of the present application provides a column base structure suitable for TOD projects, such as Figures 1 to 4 As shown. The additional column base structure suitable for TOD projects includes a first cast-in-place pier 1, a second cast-in-place pier 2, a leveling layer 3, a plurality of column base anchor bolts 4, a plurality of first vertical longitudinal steel bars 9, and a plurality of second vertical longitudinal steel bars 10. The first cast-in-place pier 1 is set on the top of the existing building 8. The plurality of first vertical longitudinal steel bars 9 all pass through the bottom of the first cast-in-place pier 1 and are implanted into the interior of the existing building 8. The plurality of first vertical longitudinal steel bars 9 are enclosed to form a rectangular frame structure and are close to the outer wall of the first cast-in-place pier 1. One end of the plurality of column base anchor bolts 4 all pass through the bottom plate 7 of the newly added building column base 6 and extend into the first cast-in-place pier 1. The bottom plate 7 is located above the leveling nut 41 of the column base anchor bolt 4.

[0024] It should be noted that the existing building 8 in this application is an existing subway parking lot building.

[0025] Specifically, a plurality of transverse reinforcements and a plurality of longitudinal reinforcements are provided in the first vertical longitudinal reinforcement 9 of the embodiment of the present application, so that the structure of the first cast-in-place pier 1 is safer and more reliable.

[0026] A gap is formed between the end of the first cast-in-place pier 1 facing away from the existing building 8 and the base plate 7. A leveling layer 3 is positioned within the gap, with the horizontal projection of the base plate 7 located within the horizontal projection of the leveling layer 3. A second cast-in-place pier 2 is positioned at the end of the first cast-in-place pier 1 facing away from the existing building 8. The studs of the newly added building's column foot 6 and the leveling layer 3 are both located within the second cast-in-place pier 2. The leveling layer 3 within the second cast-in-place pier 2 connects the second cast-in-place pier 2, the leveling layer 3, and the first cast-in-place pier 1 as a whole, making the entire structure safer and more reliable.

[0027] The plurality of second vertical longitudinal steel bars 10 are all connected to the first cast-in-place pier 1, and the plurality of second vertical longitudinal steel bars 10 enclose a rectangular frame structure and are close to the outer wall of the second cast-in-place pier 2. The second vertical longitudinal steel bars 10 of the embodiment of the present application are provided with a plurality of transverse steel bars, a plurality of longitudinal steel bars, and diagonal stirrups, making the structure of the second cast-in-place pier 2 safer and more reliable.

[0028] It should be noted that the first vertical longitudinal steel bars 9 of the present application are enclosed to form a rectangular frame structure and are implanted in a small amount into the existing building 8, so that the impact on the original structure of the existing building 8 is minimized, the structural construction is simplified, and the first cast-in-place pier 1 and the existing building 8 are reliably connected. The first cast-in-place pier 1 of the present application forms a gap with the base plate 7. After the base plate 7 is leveled by the leveling nut 41, concrete is poured to form a leveling layer 3. The first cast-in-place pier 1 and the second cast-in-place pier 2 of the present application outsource the newly added building column foot 6, which reduces the deadweight of the newly added building structure and is beneficial to the control of the structural load of the existing building 8. The present application achieves positioning through the column foot anchor 4 and realizes the embedding of the newly added building column foot 6 through the second cast-in-place pier 2 formed by the third pouring. Therefore, the added column foot structure suitable for TOD projects in the embodiment of the present application reduces the planting of reinforcement for the newly added building column foot 6, simplifies the structural construction, reduces the impact of the new building on the existing building 8, and is convenient for the preset of the column foot anchor 4. The design layout is simple, economical and reliable, and easy to construct.

[0029] In the implementation of this application, the additional column base structure suitable for TOD projects also includes multiple double nuts 5. These double nuts 5 are respectively disposed on the side of the column base anchor bolt 4 that is away from the first cast-in-place pier 1 and on the side of the base plate 7 that is away from the leveling nut 41 of the column base anchor bolt 4. The double nuts 5 of this embodiment of the application prevent loosening from the column base anchor bolt 4, ensuring safety and reliability.

[0030] In the implementation of the present application, the longitudinal section of the leveling layer 3 is trapezoidal, and the length of the upper base of the trapezoid is equal to the length of the bottom plate 7. The leveling layer 3 of the present application makes the connection between the bottom plate 7 and the first cast-in-place pier 1 tighter, and the structure is more reliable.

[0031] In the implementation of this application, the additional column base structure applicable to the TOD project further includes a plurality of top reinforcing stirrups 11. The plurality of top reinforcing stirrups 11 are arranged circumferentially on a side of the second vertical longitudinal reinforcement 10 away from the first cast-in-place pier 1, and are spaced apart along the height direction of the second vertical longitudinal reinforcement 10.

[0032] In the implementation of this application, the projection of the cross section of the first cast-in-situ pier 1 coincides with the projection of the cross section of the second cast-in-situ pier 2. The first vertical longitudinal reinforcement 9 and the second vertical longitudinal reinforcement 10 of this embodiment of the application correspond to each other and are an integrated structure, facilitating construction and forming a reliable connection between the first cast-in-situ pier 1, the second cast-in-situ pier 2, and the existing building 8.

[0033] In the implementation of the present application, the column base anchor bolt 4 is an L-shaped structure. The length of the bottom of the column base anchor bolt 4 in the embodiment of the present application is 5 times the diameter of the column base anchor bolt 4.

[0034] It should be noted that the newly added building in the embodiment of the present application is a steel structure, and the height of the first cast-in-situ pier 1 of the present application is 25 times the diameter of the column anchor 4 plus 50 mm. The height of the second cast-in-situ pier 2 of the present application is 2.5 times the width of the steel structure.

[0035] In the implementation of this application, the height of the leveling layer 3 is 50 mm and it is a non-shrinkage concrete structure.

[0036] It should be noted that the leveling layer 3 in the embodiment of the present application is a C35 non-shrinkage concrete structure.

[0037] This application conducts integrated research on key technologies such as foundation, structural system, and node structure under the constraints of factors such as TOD project site conditions, building characteristics, existing application libraries, and throat area operations. This can not only achieve the goals of TOD project structural safety, convenient construction, and controllable costs, but also make full use of limited land resources in the city to achieve harmonious and sustainable development of the economy, society, and environment.

[0038] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0039] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A column base structure suitable for TOD projects, characterized by: It comprises a first cast-in-situ pier column (1), a second cast-in-situ pier column (2), a leveling layer (3), a plurality of column foot anchor bolts (4), a plurality of first vertical longitudinal steel bars (9) and a plurality of second vertical longitudinal steel bars (10); The first cast-in-place pier (1) is arranged on the top of the existing building (8), and a plurality of first vertical longitudinal steel bars (9) pass through the bottom of the first cast-in-place pier (1) and are implanted into the interior of the existing building (8). The plurality of first vertical longitudinal steel bars (9) enclose a rectangular frame structure and are close to the outer wall of the first cast-in-place pier (1); One end of each of the plurality of column foot anchor bolts (4) passes through the bottom plate (7) of the newly added building column foot (6) and extends into the first cast-in-place pier column (1), and the bottom plate (7) is located above the leveling nut (41) of the column foot anchor bolt (4); A gap is formed between the end of the first cast-in-situ pier (1) away from the existing building (8) and the base plate (7); The leveling layer (3) is arranged in the gap, and the projection of the bottom plate (7) on the horizontal plane is located within the projection of the leveling layer (3) on the horizontal plane; The second cast-in-situ pier (2) is arranged at an end of the first cast-in-situ pier (1) away from the existing building (8), and the bolts of the newly added building column foot (6) and the leveling layer (3) are both located inside the second cast-in-situ pier (2); A plurality of second vertical longitudinal steel bars (10) are all connected to the first cast-in-place pier (1), and the plurality of second vertical longitudinal steel bars (10) are enclosed to form a rectangular frame structure and are close to the outer wall of the second cast-in-place pier (2).

2. The additional column base structure suitable for TOD projects according to claim 1 is characterized in that: Also includes a plurality of double nuts (5); The plurality of double nuts (5) are respectively arranged on a side of the column base anchor bolt (4) away from the first cast-in-place pier column (1), and are located on a side of the base plate (7) away from the leveling nut (41) of the column base anchor bolt (4).

3. The additional column base structure suitable for TOD projects according to claim 1 is characterized in that: The longitudinal section of the leveling layer (3) is trapezoidal, and the length of the upper base of the trapezoid is equal to the length of the bottom plate (7).

4. The additional column base structure suitable for TOD projects according to claim 1 is characterized in that: Also comprising a plurality of top reinforcing stirrups (11); The plurality of top reinforcing stirrups (11) are arranged in the circumferential direction of the second vertical longitudinal reinforcement (10) on the side away from the first cast-in-place pier (1), and are arranged at intervals along the height direction of the second vertical longitudinal reinforcement (10).

5. The additional column base structure suitable for TOD projects according to claim 1 is characterized in that: The projection of the cross section of the first cast-in-situ pier (1) coincides with the projection of the cross section of the second cast-in-situ pier (2).

6. The additional column base structure suitable for TOD projects according to claim 1 is characterized in that: The column foot anchor bolt (4) is an L-shaped structure.

7. The additional column base structure suitable for TOD projects according to claim 1 is characterized in that: The leveling layer (3) has a height of 50 mm and is a non-shrinkage concrete structure.

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