Additional column foot structure suitable for TOD project

Abstract

The invention 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 to promote the use of walking, cycling and public transportation, reduce 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] At present, when installing the column base of reinforced concrete structure or steel structure, 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 a high construction cost. Summary of the invention

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

[0006] The embodiment of the present application provides an additional column base structure suitable for a TOD project, comprising 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 an 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 surrounded by 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 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 a possible implementation, the additional column base structure suitable for TOD projects also includes a plurality of double nuts; the plurality of double nuts are respectively arranged on a side of the column base anchor bolt away from the first cast-in-place pier, and are located on a side of the base plate away from the leveling nut of the column base anchor bolt.

[0008] In a possible implementation manner, 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 bars away from the first cast-in-place pier, and are spaced apart along the height direction of the second vertical longitudinal steel bars.

[0010] In a possible implementation manner, a projection of a cross section of the first cast-in-place pier column coincides with a projection of a cross section of the second cast-in-place 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 the present 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 the 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 the base plate is leveled by the leveling nut, and then 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 embedding of the newly added building column base by positioning the column base anchor bolts, and the second cast-in-place pier formed by the third pouring realizes the embedding of the newly added building column base. 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 drawings required for use in the description of the embodiments of the present application will be briefly introduced below. 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 paying any creative work.

[0016] Figure 1 A schematic diagram of the structure of the 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 Sectional view of the middle BB plane;

[0019] Figure 4 A schematic diagram of the structure of the column base anchor bolt provided in an embodiment of the present application.

[0020] Figure numerals: 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 stirrups. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", and "third" are used for descriptive purposes only 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 it can be indirectly connected 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 present application embodiment provides a column base structure suitable for a TOD project, 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 arranged on the top of the existing building 8, and 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, and 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 the present application is an existing subway parking lot building.

[0025] Specifically, a plurality of transverse steel bars and a plurality of longitudinal steel bars are arranged in the first vertical longitudinal steel bar 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 away from the existing building 8 and the bottom 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-place pier 2 is arranged at the end of the first cast-in-place 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-place pier 2. The leveling layer 3 is located in the second cast-in-place pier 2, so that the second cast-in-place pier 2, the leveling layer 3 and the first cast-in-place pier 1 are connected as a whole, thereby 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 oblique stirrups, so that the structure of the second cast-in-place pier 2 is 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 the existing building 8 in small quantities, 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, and the base plate 7 is leveled by the leveling nut 41, and then 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 self-weight of the newly added building structure and is conducive to the control of the structural load of the existing building 8. The present application realizes positioning through the column foot anchor 4, and realizes the burial of the newly added building column foot 6 through the second cast-in-place pier 2 formed by the third pouring. Therefore, the additional column foot structure applicable to the TOD project of the present application embodiment reduces the planting of the newly added building column foot 6, simplifies the structural construction, reduces the impact of the newly added building on the existing building 8, and is convenient for the presetting of the column foot anchor 4, the design layout is simple, economical and reliable, and easy to construct.

[0029] In the implementation of the present application, the additional column base structure applicable to the TOD project also includes a plurality of double nuts 5. The plurality of double nuts 5 are respectively arranged on the side of the column base anchor bolt 4 away from the first cast-in-place pier 1, and are located on the side of the bottom plate 7 away from the leveling nut 41 of the column base anchor bolt 4. The double nuts 5 of the embodiment of the present application can prevent them from loosening from the column base anchor bolt 4, which is safe and reliable.

[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 bottom plate 7 and the first cast-in-place pier 1 more tightly connected, and the structure is more reliable.

[0031] In the implementation of this application, the additional column base structure applicable to the TOD project also includes a plurality of top reinforcing stirrups 11. The plurality of top reinforcing stirrups 11 are arranged in the circumference of the second vertical longitudinal reinforcement 10 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.

[0032] In the implementation of the present application, the projection of the cross section of the first cast-in-place pier 1 coincides with the projection of the cross section of the second cast-in-place pier 2. The first vertical longitudinal reinforcement 9 and the second vertical longitudinal reinforcement 10 of the embodiment of the present application correspond to each other and are an integrated structure, which is convenient for construction, so that the first cast-in-place pier 1, the second cast-in-place pier 2 and the existing building 8 are reliably connected.

[0033] In the implementation of the present application, the column foot anchor bolt 4 is an L-shaped structure. The length of the bottom of the column foot anchor bolt 4 in the embodiment of the present application is 5 times the diameter of the column foot 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-place pier 1 of the present application is 25 times the diameter of the column foot anchor 4 plus 50 mm. The height of the second cast-in-place pier 2 of the present application is 2.5 times the width of the steel structure.

[0035] In the implementation of the present application, the height of the leveling layer 3 is 50 mm and 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, and the current operating status of existing application libraries and throat areas. It 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 may still be modified, or some or all of the technical features thereof may 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 in that: It comprises a first cast-in-place pier column (1), a second cast-in-place 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 inside 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 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-place pier (1) away from the existing building (8) and the bottom 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-place pier (2) is arranged at an end of the first cast-in-place 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-place 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 includes a plurality of top reinforcing stirrups (11); A 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-place pier (1) coincides with the projection of the cross section of the second cast-in-place 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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