A prefabricated frame base beam with groove connection

Abstract

The present invention discloses a prefabricated frame-type base beam with a groove-type connection, comprising a prefabricated prestressed base beam, wherein two single-limb prestressed longitudinal beams and a transverse bottom plate, and a transverse connecting block in the prefabricated prestressed base beam are prefabricated and cast into an integrated structural component, wherein the transverse connecting block is located in a space enclosed by two parallel single-limb prestressed longitudinal beams and a transverse bottom plate, and the base beam groove is located between adjacent transverse connecting blocks, and reserved exposed stirrups are provided inside the base beam groove. In this technical solution, reserved exposed stirrups are provided in the base beam groove of the prefabricated prestressed base beam, and the spacing of the reserved exposed stirrups can be set according to the required horizontal and longitudinal adjustment of the prefabricated structural column, so as to achieve the purpose of adjusting the horizontal displacement of the prefabricated structural column after the prefabricated prestressed base beam is placed. The depth of the base beam groove and the depth of the reserved exposed stirrups are adapted to the vertical upward or vertical downward adjustment of the prefabricated structural column. The entire structure is convenient for construction, and the construction process is easy to control.

Description

Technical Field

[0001] The present invention relates to the technical field of urban rail transit, and in particular to a prefabricated frame-type base beam with groove-type connections. Background Art

[0002] At present, the foundation components in the fields of civil construction and urban rail transit generally adopt cast-in-place construction technology, and prefabricated foundation component solutions are rarely used. A few projects adopt the construction solution of prefabricated independent foundation. The traditional connection method between the independent foundation and the superstructure column is grouting sleeve or steel slurry anchor overlap.

[0003] When using grouting sleeves or steel anchor lap joints, a construction joint exists between the foundation and the superstructure columns, resulting in poor overall connection performance. Existing foundation components are mostly cast-in-place. While this approach is simple and provides good structural integrity, it also suffers from drawbacks such as slow construction progress, high pollution levels, and uncontrollable quality.

[0004] Existing foundation components also adopt prefabricated foundation solutions, but traditional prefabricated foundation components are relatively bulky and large in size, require large machinery to transport, are difficult to connect with other components, and have poor precision control. At the same time, there is a problem that once the lower prefabricated foundation is placed, the upper prefabricated structural columns will not be able to be adjusted. Summary of the Invention

[0005] The present invention provides a prefabricated frame type base beam with a groove type connection. A prefabricated prestressed base beam is set, and the prefabricated prestressed base beam includes reserved exposed stirrups, a single-limb prestressed longitudinal beam, a transverse bottom plate, a transverse connecting block, a base beam groove, reserved exposed stirrups, longitudinal full-length ordinary stress-bearing steel bars, longitudinal full-length prestressed steel bars and stirrups in the beam body. The single-limb prestressed longitudinal beam, the transverse bottom plate and the transverse connecting block, the base beam groove, the longitudinal full-length ordinary stress-bearing steel bars, the longitudinal full-length prestressed steel bars and the stirrups in the beam body are prefabricated and cast into an integrated structural component. The entire prefabricated prestressed base beam is a prefabricated structure, and the entire structure is small in size, light in structure, easy to construct and install, and the construction process is easy to control, thereby solving the technical problems that components obtained by the cast-in-place process are inconvenient to transport, resulting in slow construction, etc.

[0006] The present invention is achieved through the following technical solutions:

[0007] A prefabricated frame-type base beam with a groove connection includes a prefabricated prestressed base beam, which includes two parallel single-leg prestressed longitudinal beams, a transverse bottom plate, a transverse connecting block, a base beam groove, reserved exposed stirrups, longitudinal full-length ordinary stress-bearing steel bars, longitudinal full-length prestressed steel bars and stirrups in the beam body. The transverse connecting block is located in the space enclosed by the two parallel single-leg prestressed longitudinal beams and the transverse bottom plate, the base beam groove is located between adjacent transverse connecting blocks, and reserved exposed stirrups are provided inside the base beam groove.

[0008] The key innovation of the groove-connected prefabricated frame-type base beam in this technical solution lies in the fact that the single-leg prestressed longitudinal beam, transverse base plate, transverse connecting block, and base beam groove that comprise the prefabricated frame-type base beam are prefabricated and cast in the factory as an integrated structural component. The prefabricated structural component is compact in overall size, facilitating installation. Furthermore, the base beam groove within the prefabricated prestressed base beam connects to other components, ensuring a stable overall connection. By providing reserved exposed stirrups within the base beam groove, the bearing capacity and strength of the overall prefabricated frame-type base beam are enhanced, while also facilitating stability and adjustability in connection with other components.

[0009] In this technical solution, two parallel single-leg prestressed longitudinal beams and a transverse bottom plate enclose a groove space with an open upper end. The base beam grooves and transverse connecting blocks are alternately distributed in the groove space, that is, the transverse connecting blocks are located between adjacent transverse connecting blocks. The transverse connecting blocks, base beam grooves, single-leg prestressed longitudinal beams and transverse bottom plates are prefabricated and cast into an integrated structural component.

[0010] Optionally, the prefabricated prestressed base beams and cross beams form a prefabricated frame structure system.

[0011] Optionally, the reserved exposed stirrups are arranged horizontally in the base beam groove, and the spacing between the reserved exposed stirrups is adapted to the horizontal and longitudinal adjustment amount of the prefabricated structural column, and the prefabricated structural column is located above the base beam groove.

[0012] Optionally, during installation, after the prefabricated structural column is inserted into the base beam groove, the prefabricated structural column and the base groove connection area are cast in situ to form a cast-in-situ connection.

[0013] Optionally, the depth of the base beam groove and the depth of the reserved exposed stirrups are both adapted to the vertical adjustment amount of the prefabricated structural column.

[0014] Optionally, the inner wall of the base beam groove and the bottom surface of the prefabricated structural column are both roughened.

[0015] Optionally, the prefabricated structural column includes a prefabricated column and a reserved gate-shaped reinforcement at the bottom of the prefabricated column, wherein the reserved gate-shaped reinforcement at the bottom of the column is in a closed gate shape and is arranged horizontally; the reserved gate-shaped reinforcement at the bottom of the column is inserted into the reserved exposed stirrups, so that the connection node between the prefabricated structural column and the prefabricated prestressed base beam achieves the purpose of rigid connection.

[0016] Optionally, a post-insertion distribution reinforcement is inserted into the groove of the base beam, and the post-insertion distribution reinforcement passes through the interior of the gate-shaped reinforcement reserved at the bottom of the column and is located below the reserved exposed stirrups.

[0017] Optionally, the longitudinal full-length ordinary stress-bearing steel bars provided in the single-leg prestressed longitudinal beam are distributed in a right-angled trapezoidal shape around the beam body and are staggeredly connected with the stirrups in the beam body. The reserved exposed stirrups are respectively staggeredly connected with the intersection points of the longitudinal full-length ordinary stress-bearing steel bars and the stirrups in the beam body at the same height in the middle of the beam bodies on both sides. The reserved exposed stirrups and the stirrups in the beam body are arranged together at intervals along the longitudinal direction. The longitudinal full-length prestressed steel bars are located inside the right-angled trapezoidal area enclosed by the longitudinal full-length ordinary stress-bearing steel bars. Specifically, the longitudinal full-length prestressed steel bars are distributed in parallel at: i. a position in the middle and lower part of the right-angled trapezoidal area close to the bottom longitudinal full-length ordinary stress-bearing steel bars; and / or ii. a position in the right-angled trapezoidal area at the same height as the reserved exposed stirrups, and are staggeredly connected with the reserved exposed stirrups.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] 1) In this technical solution, a prefabricated frame structure system is formed by providing prefabricated prestressed base beams and cross beams. Compared with the raft foundation, the prefabricated frame structure system has a lighter weight and saves materials; compared with the independent foundation form, the foundation components are interconnected, with high integrity and good resistance to differential settlement.

[0020] 2) This technical solution sets a prefabricated prestressed base beam, and the spacing of the reserved exposed stirrups can be set according to the required horizontal and longitudinal adjustment of the prefabricated structural column, thereby achieving the purpose of adjusting the horizontal displacement of the prefabricated structural column after the prefabricated prestressed base beam is placed. The depth of the base beam groove and the depth of the reserved exposed stirrups are adapted to the vertical upward or vertical downward adjustment range of the prefabricated structural column. The overall structure is easy to construct and install, and the construction process is easy to control.

[0021] 3) The prefabricated prestressed base beam in this technical solution includes a single-leg prestressed longitudinal beam, a transverse bottom plate and a transverse connecting block, which are prefabricated and cast into an integrated structural member. The overall prefabricated structure is light and convenient to transport. It is conducive to connection and installation with other structures and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1Schematic diagram of a prefabricated frame structure system formed by prefabricated prestressed base beams and cross beams of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection between the prefabricated prestressed base beam and the prefabricated structural column of the present invention;

[0024] Figure 3 It is a schematic diagram of the prefabricated prestressed base beam of the present invention;

[0025] Figure 4 1 is a schematic cross-sectional view of a prefabricated prestressed base beam of the present invention;

[0026] Figure 5 It is a schematic diagram of the prefabricated structural column of the present invention;

[0027] Figure 6 It is a cross-sectional schematic diagram of the connection between the prefabricated prestressed base beam and the prefabricated structural column of the present invention.

[0028] Among them: 1-prefabricated prestressed base beam, 2-cross beam, 3-prefabricated structural column, 4-post-inserted distribution reinforcement, 5-cast-in-place connection, 101-single-leg prestressed longitudinal beam, 102-cross bottom plate, 103-cross connection block, 104-base beam groove, 105-reserved exposed stirrups, 106-longitudinal full-length ordinary stress-bearing steel bars, 107-longitudinal full-length prestressed steel bars, 108-stirrups inside the beam body, 301-prefabricated column, 302-reserved gate-shaped bars at the bottom of the column. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0030] Example 1:

[0031] like Figures 1-6 As shown, a prefabricated frame-type base beam with a groove-type connection includes a prefabricated prestressed base beam 1. The prefabricated prestressed base beam 1 includes two parallel single-leg prestressed longitudinal beams 101, a transverse bottom plate 102, a transverse connecting block 103, a base beam groove 104, reserved exposed stirrups 105, longitudinal full-length ordinary stress-bearing steel bars 106, longitudinal full-length prestressed steel bars 107 and stirrups 108 in the beam body. The transverse connecting block is located in the space enclosed by the two parallel single-leg prestressed longitudinal beams and the transverse bottom plate, the base beam groove is located between adjacent transverse connecting blocks, and the interior of the base beam groove is provided with reserved exposed stirrups.

[0032] Among them, the prefabricated prestressed base beam 1 and the cross beam 2 form a frame structure system to form a prefabricated frame type base beam. Specifically, the two parallel prefabricated prestressed base beams 1 are connected by the cross beam 2, and the prefabricated prestressed base beam 1 and the cross beam 2 form a prefabricated frame structure. In this embodiment, the prefabricated prestressed base beam 1 is constructed using a pre-tensioning construction process. The longitudinal full-length ordinary stress-bearing steel bars 106, the longitudinal full-length prestressed steel bars 107 and the stirrups 108 in the beam body are laid in advance in the factory, wherein the longitudinal full-length ordinary stress-bearing steel bars 106 and the stirrups 108 in the beam body form a steel cage skeleton, and the longitudinal full-length prestressed steel bars 107 are arranged on the inner side of the steel cage skeleton. Then, the construction templates of the prefabricated prestressed base beam 1 and the cross beam 2 are set up, the longitudinal full-length prestressed steel bars 107 are tensioned to the specified value, concrete is poured, and curing is completed. The prefabricated prestressed base beam 1 and the cross beam 2 form a prefabricated frame structure system. The base beam groove 104 is an inverted trapezoidal shape to facilitate compaction of concrete. The inner surface of the base beam groove 104 is roughened. The depth and width of the base beam groove 104 are determined based on the vertical and horizontal adjustments of the precast structural column 3. The reserved exposed stirrups 105 are arranged horizontally, and the spacing between the reserved exposed stirrups 105 is set to accommodate the horizontal and vertical adjustments of the precast structural column 3, and can be set to 100mm to 150mm.

[0033] The reserved exposed stirrups 105 are arranged horizontally within the base beam recess 104. The spacing between the reserved exposed stirrups 105 is adapted to the horizontal, longitudinal, transverse, and vertical adjustments of the prefabricated structural column 3, which is located above the base beam recess 104. During installation, after the prefabricated structural column 3 is inserted into the base beam recess 104, the connection area between the prefabricated structural column 3 and the base recess 104 is cast in situ to form a cast-in-situ connection 5. The depth of the base beam recess 104 and the depth of the reserved exposed stirrups 105 are both adapted to the vertical adjustments of the prefabricated structural column 3.

[0034] Specifically, the depth of the base beam groove 104 and the depth of the reserved exposed stirrups 105 both allow for a 30mm vertical upward and downward position adjustment of the prefabricated structural column 3. The width of the base beam groove 104 and the transverse spacing of the reserved exposed stirrups 105 also allow for a 50mm horizontal and longitudinal adjustment of the prefabricated structural column 3, effectively reducing the construction positioning accuracy and difficulty of the prefabricated prestressed base beam 1 and achieving the desired position adjustment of the prefabricated structural column 3.

[0035] Example 2:

[0036] In this embodiment, based on the embodiment 1, the prefabricated structural column 3 includes a prefabricated column 301 and a gate-shaped reinforcement 302 reserved at the bottom of the prefabricated column 301. The gate-shaped reinforcement 302 reserved at the bottom of the column is a closed gate shape and is arranged horizontally. The gate-shaped reinforcement 302 reserved at the bottom of the column is inserted between adjacent reserved exposed stirrups 105. After adjusting the vertical and longitudinal and transverse horizontal positions of the prefabricated structural column 3 and constructing the cast-in-place connection part 5, the connection node between the prefabricated structural column 3 and the prefabricated prestressed base beam 1 can achieve the purpose of rigid connection.

[0037] The horizontal arrangement of the pre-reserved gate-shaped reinforcement 302 at the column base allows for a 50mm horizontal adjustment of the precast column 301 after vertical insertion of the pre-reserved gate-shaped reinforcement 302. The spacing between the reserved exposed stirrups 105 allows for a 50mm horizontal and vertical adjustment of the precast column 301. The provision of the pre-reserved gate-shaped reinforcement 302 at the column base in this embodiment facilitates the connection between the precast structural column 3 and the precast prestressed base beam 1. After the precast prestressed base beam 1 is installed, the precast structural column 3 can be positioned horizontally and vertically for installation by adjusting the spacing between the reserved exposed stirrups 105.

[0038] Example 3:

[0039] In this embodiment, based on the above, post-insertion distribution bars 4 are inserted into the base beam groove 104. These post-insertion distribution bars 4 pass through the interior of the reserved gate-shaped bars 302 at the column base and are located below the reserved exposed stirrups 5. The post-insertion distribution bars 4 are located below the reserved exposed stirrups 105 and within the closed gate-shaped interior of the reserved gate-shaped bars 302 at the column base, effectively enhancing the pull-out anchoring effect of the reserved gate-shaped bars 302 at the column base.

[0040] Example 4:

[0041] In this embodiment, based on the above-mentioned embodiment, the longitudinal full-length ordinary stress-bearing steel bars 106 provided in the single-leg prestressed longitudinal beam 101 are distributed in a right-angled trapezoidal shape around the beam body and are interlaced with the stirrups in the beam body. The reserved exposed stirrups 105 are interlaced with the intersection points of the longitudinal full-length ordinary stress-bearing steel bars 106 and the stirrups 108 in the beam body at the same height in the middle of the beam bodies on both sides. The reserved exposed stirrups 105 and the stirrups 108 in the beam body are arranged together at intervals along the longitudinal direction. The longitudinal full-length prestressed steel bars 107 are located inside the right-angled trapezoidal area enclosed by the longitudinal full-length ordinary stress-bearing steel bars 106. Specifically, they can be distributed in parallel at the middle and lower part of the right-angled trapezoidal area, near the bottom longitudinal full-length ordinary stress-bearing steel bars 106, and at a position in the right-angled trapezoidal area that is consistent in height with the reserved exposed stirrups 105, and are interlaced with the reserved exposed stirrups 105. The optimized steel bar position distribution improves the stability and stress-bearing capacity of the steel bars, and has a higher bearing capacity and crack resistance.

[0042] In this embodiment, the prefabricated prestressed base beam 1 is constructed using a pre-tensioning construction process. Ordinary steel bars and prestressed steel wires are laid in the factory, and a construction formwork for the prefabricated prestressed base beam 1 and cross beam 2 is set up. The prestressed steel wires are tensioned to a specified value, and concrete is poured. After curing, the prefabricated prestressed base beam 1 and cross beam 2 form a prefabricated frame structure system. The inner wall surface of the base beam groove 104 is roughened, and the depth and width of the base beam groove 104 are determined based on the vertical and horizontal adjustment amounts of the prefabricated structural column 3. Exposed stirrups 105 are reserved for horizontal arrangement, and the stirrup spacing satisfies the horizontal and vertical adjustment amounts of the prefabricated structural column 3.

[0043] The inner wall of the base beam groove 104 and the bottom surface of the prefabricated structural column 3 are both roughened, which can improve the connection strength between the base beam groove 104, the prefabricated structural column 3 and the cast-in-place connection part 5.

[0044] In summary of the above schemes, the present invention successfully meets the purpose of directly receiving the force directly transmitted by the upper rails by optimizing the design of the steel bars in the prefabricated prestressed base beam 1. First, the reserved exposed stirrups 105 can be arranged in rows and cross-wise with the reserved gate-shaped bars 302 at the bottom of the upper column, thereby improving the casting structural strength of the cast-in-place connection 5 in the base beam groove 104. Second, the trapezoidal structural design of the single-leg prestressed longitudinal beam 101 makes the casting of the cast-in-place connection 5 more sufficient and dense. Third, at the same time, the longitudinal through-length ordinary stress-bearing steel bars 106 are distributed in a right-angled trapezoidal shape in the beam bodies on both sides, which improves the stress-bearing capacity of the steel bars and the stability of the structure, and at the same time provides good support for the reserved exposed stirrups 105; fourth, the transverse connecting blocks 103 make the base beam groove 104 distributed in a spaced point-like manner, which improves the overall stability of the structural connection, preliminarily reduces the staggering and dislocation caused by excessive stress, and reduces the connection ratio of the cast-in-place connection 5. Fifthly, the added longitudinal full-length prestressed steel bars 107 and the post-inserted distribution bars 4 are optimized respectively, which further improve the support and force stability of the overall steel bars step by step. At the same time, they are further staggered with the gate-shaped bars 302 reserved at the bottom of the column, which greatly improves the safety and stability of the overall structure under the working condition of direct force transmission from the upper rails, and prevents deformation, offset or dislocation and other adverse phenomena caused by excessive force in the process of direct force transmission.

[0045] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A prefabricated frame type base beam with groove connection, characterized in that: The invention comprises a prefabricated prestressed base beam (1), wherein the prefabricated prestressed base beam (1) comprises two parallel single-limb prestressed longitudinal beams (101), a transverse bottom plate (102), a transverse connecting block (103), a base beam groove (104), reserved exposed stirrups (105), longitudinal full-length ordinary stress-bearing steel bars (106), longitudinal full-length prestressed steel bars (107) and stirrups (108) in the beam body, the single-limb prestressed longitudinal beam (101), the transverse bottom plate (102), the transverse connecting block (103), the base beam groove (104), the longitudinal full-length ordinary stress-bearing steel bars (106), the longitudinal full-length prestressed steel bars (107) The base beam groove (104) is located between adjacent transverse connecting blocks (103), and the interior of the base beam groove (104) is provided with reserved exposed stirrups (105); the base beam groove (104) is in the shape of an inverted trapezoid; the two parallel prefabricated prestressed base beams (1) are connected by a cross beam (2), and the prefabricated prestressed base beams (1) and the cross beam (2) form a prefabricated frame structure system; The reserved exposed stirrups (105) are arranged transversely in the base beam groove (104), and the spacing between the reserved exposed stirrups (105) is adapted to the horizontal longitudinal, transverse and vertical adjustment amounts of the prefabricated structural column (3), and the prefabricated structural column (3) is located above the base beam groove (104); During installation, after the prefabricated structural column (3) is inserted into the base beam groove (104), the connection area between the prefabricated structural column (3) and the base beam groove (104) is cast in situ to form a cast-in-situ connection portion (5); The depth of the base beam groove (104) and the depth of the reserved exposed stirrups (105) are both adapted to the vertical adjustment amount of the prefabricated structural column (3).

2. The groove-connected prefabricated frame base beam according to claim 1, characterized in that: The inner wall of the base beam groove (104) and the bottom surface of the prefabricated structural column (3) are both roughened.

3. The groove-connected prefabricated frame base beam according to claim 1, characterized in that: The prefabricated structural column (3) comprises a prefabricated column (301) and a column bottom reserved gate-shaped reinforcement (302) arranged at the bottom of the prefabricated column (301); the column bottom reserved gate-shaped reinforcement (302) is in a closed gate shape and is arranged horizontally; the column bottom reserved gate-shaped reinforcement (302) is inserted into the interior of the reserved exposed stirrups (105).

4. The groove-connected prefabricated frame base beam according to claim 3, characterized in that: A rear-inserted distribution reinforcement (4) is inserted into the base beam groove (104), and the rear-inserted distribution reinforcement (4) passes through the interior of the reserved gate-shaped reinforcement (302) at the column bottom and is located below the reserved exposed stirrup (105).

5. The groove-connected prefabricated frame base beam according to claim 1, characterized in that: The longitudinal full-length common stress-bearing steel bars (106) arranged in the single-limb prestressed longitudinal beam (101) are distributed in a right-angled trapezoid around the beam body and are staggeredly connected with the stirrups (108) in the beam body. The reserved exposed stirrups (105) are staggeredly connected with the intersection points of the longitudinal full-length common stress-bearing steel bars (106) and the stirrups (108) in the beam body at the same height in the middle of the beam bodies on both sides. The reserved exposed stirrups (105) and the stirrups (108) in the beam body are arranged at intervals in the longitudinal direction. The longitudinal full-length prestressed steel bars (107) are located inside the right-angled trapezoidal area enclosed by the longitudinal full-length common stress-bearing steel bars (106).

6. The groove-connected prefabricated frame base beam according to claim 5, characterized in that: The longitudinal through-length prestressed steel bars (107) are distributed in parallel at: i. a position in the middle and lower part of the right-angled trapezoidal area close to the bottom longitudinal through-length ordinary stress-bearing steel bars (106), and / or ii. a position in the right-angled trapezoidal area that is at the same height as the reserved exposed stirrups (105), and are staggeredly connected with the reserved exposed stirrups (105).

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