Novel hollow column
By designing a new type of hollow column, which uses precast solid and hollow parts integrally formed and connected by grouting sleeves, the problems of heavy precast column weight and time-consuming and labor-intensive connection are solved, resulting in significant weight reduction and improved construction efficiency.
Patent Information
- Application Number
- CN202423084208.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-13
AI Technical Summary
The existing precast columns are quite heavy, which affects construction costs and tower crane selection. In addition, traditional connection methods are time-consuming and labor-intensive, making it difficult to meet the requirements of high assembly rates.
A novel hollow column is designed, comprising a precast solid column section and a precast hollow column section integrally formed, with a cavity in the center, connected by a grouting sleeve, and a steel reinforcement skeleton integrally made with concrete, the steel reinforcement skeleton including vertical bars and stirrups, forming an integral structure through grouting through the sleeve.
It achieves a weight reduction of more than 50% for precast columns, simplifies the construction process, reduces construction costs, reduces the time spent on tower cranes, and has high connection accuracy, requiring no special equipment or separate formwork.
Smart Images
Figure CN223824450U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated building components, and more specifically to the field of a novel hollow column technology. Background Technology
[0002] In frame structures, with the increase in assembly rate, precast columns are used for construction to meet the requirements of assembly rate. Currently, conventional precast columns are solid concrete columns, connected on-site by grouting with sleeves. Solid concrete precast columns have a large self-weight, which has a significant impact on the selection of tower cranes and construction costs. Therefore, research on weight reduction of precast columns is of great significance for reducing on-site construction costs.
[0003] Currently, the most widely used precast column weight reduction technologies on the market include the "SPCS hollow column" developed by Sany Construction and the "EMC precast hollow column" developed by China Academy of Building Research.
[0004] EMC precast hollow columns utilize pre-embedded metal pipes to form a composite column system with vertical holes. The EMC precast hollow columns only have vertical structural steel bars, column stirrups, and tie bars to form a steel cage. Large-diameter continuous longitudinal bars are inserted into the cavity of the precast column, and the upper and lower layers of large-diameter continuous longitudinal bars are mechanically connected, such as by straight threads. The weight reduction of EMC precast hollow columns is mainly achieved through the pre-reserved continuous channels within the precast column.
[0005] SPCS hollow columns are precast hollow columns made by integrally constructing a steel reinforcement cage and concrete. The hollow column component and the subsequent cast-in-place concrete are integrated through necessary structural measures to jointly bear vertical and horizontal loads. Weight reduction is primarily achieved through the hollow central section, connected by specialized steel reinforcement connectors.
[0006] EMC precast hollow columns and SPCS cavity columns require specially designed connection components, and assembly is time-consuming and labor-intensive. The traditional sleeve grouting connection method for solid concrete precast columns is not applicable. Utility Model Content
[0007] The purpose of this utility model is to provide a novel hollow column in order to solve the above-mentioned technical problems.
[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:
[0009] This utility model provides a novel hollow column, comprising a lower precast solid column portion and an upper precast hollow column portion, wherein the precast solid column portion and the precast hollow column portion are integrally formed, and a cavity for pouring concrete is formed at the center of the precast hollow column portion along the column axis.
[0010] The bottom of the precast solid column section is provided with multiple connection holes, and the top of the precast hollow column section is provided with connectors that mate with the connection holes of the precast solid column sections of adjacent columns.
[0011] Each connection hole is equipped with a grouting sleeve that connects to the corresponding connector.
[0012] Specifically, the hollow column is constructed by integrating a precast steel cage with concrete, with a solid precast column at the bottom and a hollow precast column at the top. The upper hollow precast column and the subsequent cast-in-place concrete are integrated through necessary structural measures to jointly bear vertical and horizontal loads. The upper and lower precast columns are connected by grouting with sleeves.
[0013] In one embodiment, each grouting sleeve is provided with a grouting hole and a grout outlet hole, and the side wall of the precast solid column is provided with a grouting pipe that communicates with the corresponding grouting hole.
[0014] In one embodiment, the system further includes a steel reinforcement cage, which includes multiple vertical bars located at the edge of the column and evenly distributed along the column axis, and a multi-layer stirrup assembly tied to the multiple vertical bars along the column axis. Each stirrup assembly includes multiple crisscrossing stirrups, and the ends of each stirrup are tied to the corresponding vertical bars.
[0015] Specifically, the middle nodes of the stirrups should be reinforced accordingly, such as the intersection of stirrups should be fully tied or spot welded.
[0016] In one embodiment, the lower part of the reinforcing steel cage is located in the precast solid column section, and the upper part of the reinforcing steel cage is located in the precast hollow column section; each vertical bar extends from the end of the precast solid column section away from the end of the precast hollow column section, and the portion of each vertical bar extending from the end of the precast hollow column section serves as a connector.
[0017] The top of each vertical bar is connected to the bottom of the grouting sleeve located in the corresponding connection hole;
[0018] The bottom of the vertical reinforcement in the precast solid column is located in the corresponding connection hole and connected to the top of the corresponding grouting sleeve.
[0019] In one embodiment, the wall thickness of the prefabricated hollow column portion is ≥100mm.
[0020] In one embodiment, the sidewall of the prefabricated hollow column portion is provided with an exhaust port communicating with the cavity.
[0021] In one embodiment, the reinforcing cage uses HRB400 grade steel bars, and the concrete grade is C40.
[0022] In one embodiment, the grouting sleeve is a Hongqi semi-grouting sleeve.
[0023] In one embodiment, an observation port is provided on the side wall of the prefabricated hollow column section.
[0024] In one embodiment, the cross-section of the prefabricated solid column portion and the cross-section of the prefabricated hollow column portion are square structures with the same length and width, and the cross-section of the cavity is a square hole.
[0025] The beneficial effects of this utility model are as follows:
[0026] This utility model has a reasonable design, and the precast hollow column of this utility model reduces the weight by more than 50%; it does not require modification of the reinforcement of the existing construction drawings; the grouting sleeve connection has high connection accuracy requirements; the precast column processing does not require special equipment, and the precast column uses air bladders to form the cavity; no separate formwork is required, and the tower crane occupancy time is short. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the elevation structure of this utility model;
[0029] Figure 2 yes Figure 1 Schematic diagram of a structure with a steel reinforcement frame;
[0030] Figure 3 yes Figure 2 Top view;
[0031] Figure 4 yes Figure 2 A schematic diagram of a partial structure;
[0032] Figure 5 yes Figure 4 Top view;
[0033] Reference numerals: 1-Precast solid column section, 2-Precast hollow column section, 3-Cavity, 4-Vertical reinforcement, 5-Stirrup assembly, 6-Grouting sleeve, 7-Observation port. Detailed Implementation
[0034] To make the technical problems, technical solutions, and technical effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0036] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0037] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0038] This utility model provides a novel hollow column, including a lower precast solid column part 1 and an upper precast hollow column part 2. The precast solid column part 1 and the precast hollow column part 2 are integrally formed, and a cavity 3 for pouring concrete is opened at the center of the precast hollow column part 2 along the column axis.
[0039] The bottom of the precast solid column section 1 is provided with multiple connection holes, and the top of the precast hollow column section 2 is provided with connectors that mate with the connection holes of the precast solid column section 1 of the adjacent column.
[0040] Each connection hole is equipped with a grouting sleeve 6 that connects to the corresponding connector.
[0041] Specifically, the hollow column is constructed by integrating a precast steel cage with concrete. The lower part is a solid precast column section 1, and the upper part is a precast hollow column section 2. The upper precast hollow column and the post-cast concrete are integrated through necessary structural measures to jointly bear vertical and horizontal loads. The upper and lower precast columns are connected by sleeve grouting.
[0042] In one embodiment, each grouting sleeve 6 is provided with a grouting hole and a grout outlet hole, and the side wall of the precast solid column part 1 is provided with a grouting pipe that communicates with the corresponding grouting hole.
[0043] In one embodiment, the system further includes a steel reinforcement cage, which includes multiple vertical bars 4 located at the edge of the column and evenly distributed along the column axis, and a multi-layer stirrup assembly 5 tied to the multiple vertical bars 4 along the column axis. Each stirrup assembly 5 includes multiple stirrups arranged in a crisscross pattern, and the ends of each stirrup are tied to the corresponding vertical bar 4.
[0044] Specifically, the middle nodes of the stirrups should be reinforced accordingly, such as the intersection of stirrups should be fully tied or spot welded.
[0045] In one embodiment, the lower part of the reinforcing steel cage is located in the precast solid column section 1, and the upper part of the reinforcing steel cage is located in the precast hollow column section 2; each vertical bar 4 extends from the end of the precast solid column section 1 to the end of the precast hollow column section 2, and the portion of each vertical bar 4 extending to the end of the precast hollow column section 2 serves as a connector.
[0046] The top of each vertical rib 4 is connected to the bottom of the grouting sleeve 6 located in the corresponding connection hole;
[0047] The bottom of the vertical rib 4 located in the precast solid column part 1 is located in the corresponding connection hole and connected to the top of the corresponding grouting sleeve 6.
[0048] In one embodiment, the wall thickness of the prefabricated hollow column portion 2 is ≥100mm.
[0049] In one embodiment, the side wall of the prefabricated hollow column portion 2 is provided with an exhaust hole that communicates with the cavity 3.
[0050] In one embodiment, the reinforcing cage uses HRB400 grade steel bars, and the concrete grade is C40.
[0051] In one embodiment, the grouting sleeve 6 is a Hongqi semi-grouting sleeve 6.
[0052] In one embodiment, an observation port 7 is provided on the side wall of the prefabricated hollow column portion 2.
[0053] In one embodiment, the cross-section of the prefabricated solid column portion 1 and the cross-section of the prefabricated hollow column portion are square structures with the same length and width, and the cross-section of the cavity 3 is a square hole.
[0054] Example 1
[0055] like Figures 1 to 5 As shown, this embodiment provides a novel precast hollow column, which is integrally constructed from a precast steel cage and concrete. The lower 580mm section is a precast solid column 1, and the upper section is a precast hollow column 2. The upper precast hollow column and the post-cast concrete are integrated through necessary structural measures to jointly bear vertical and horizontal loads. The upper precast hollow column has a wall thickness ≥100mm, and the upper and lower precast columns are connected by sleeve grouting. Based on the verification points identified in the design, production, hoisting, installation, and pouring stages, a verification plan was developed and relevant verifications were conducted, providing valuable data for further research on the novel precast hollow column.
[0056] The new precast hollow column has a cross-sectional size of 1000mm×1000mm×3260mm, of which the 580mm range from the bottom of the grouting sleeve 6 is solid, the length of the weight-reducing hollow part is 2680mm, and the wall thickness is 100mm.
[0057] The concrete mix design for hollow columns adopts the existing C40 mix design (the mix design is shown in Table 1 below), and the concrete slump is set to 160mm ± 20mm.
[0058] Table 1. Concrete Formula for Hollow Columns
[0059]
[0060] Verification method: C40 concrete will be prepared in the laboratory with a slump tentatively set at 160mm ± 20mm, and measurements will be recorded on-site. The vibration effect of the concrete will be observed on-site during pouring. If the workability of the concrete does not meet the vibration requirements, an appropriate water-reducing agent will be added to the concrete in the mixer truck to increase the slump. Adjustments will be made, and the slump value of the adjusted concrete will still need to be measured and recorded to check the vibration effect.
[0061] This embodiment is compared with EMC precast hollow columns and SPCS cavity columns:
[0062] EMC precast hollow columns reduce weight by 20% to 40%, requiring modifications to the reinforcement details in the existing construction drawings.
[0063] SPCS hollow columns reduce weight by more than 50% and do not require modification of existing reinforcement drawings; however, the use of centrifugal drilling for these precast columns and the use of flip-plate equipment for the precast walls restricts the selection of component manufacturers and affects procurement and supply; and high precision is required for rebar positioning.
[0064] The precast hollow column disclosed in this embodiment reduces weight by more than 50%; it does not require modification of existing reinforcement drawings; the grouting sleeve 6 connection requires high precision; precast column processing requires no special equipment, and the precast column uses airbags to form the cavity 3; no separate formwork is needed, and tower crane time is short. However, it has many reinforcing bars with small tolerances, making on-site alignment difficult to ensure workers connect each column individually. In summary, the overall performance of the precast hollow column in this embodiment is superior to that of EMC precast hollow columns and SPCS cavity columns.
Claims
1. A novel hollow column, characterized in that, It includes a lower precast solid column part (1) and an upper precast hollow column part (2), the precast solid column part (1) and the precast hollow column part (2) are integrally formed, and a cavity (3) for pouring concrete is opened at the center of the precast hollow column part (2) along the column axis. The bottom of the precast solid column part (1) is provided with multiple connecting holes, and the top of the precast hollow column part (2) is provided with connecting parts that cooperate with the corresponding connecting holes of the precast solid column part (1) of the adjacent column.
2. A novel hollow column according to claim 1, characterized in that, Each of the connecting holes is provided with a grouting sleeve (6) connected to the corresponding connecting member. Each of the grouting sleeves (6) is provided with a grouting hole and a grout outlet hole. The side wall of the precast solid column part (1) is provided with a grouting pipe that communicates with the corresponding grouting hole.
3. A novel hollow column according to claim 2, characterized in that, It also includes a steel reinforcement cage, which includes multiple vertical bars (4) located at the edge of the column and evenly distributed along the column axis, and a multi-layer stirrup assembly (5) tied along the column axis to the multiple vertical bars (4). Each layer of the stirrup assembly (5) includes multiple stirrups that are crisscrossed, and the ends of each stirrup are tied to the corresponding vertical bar (4).
4. A novel hollow column according to claim 3, characterized in that, The lower part of the steel reinforcement skeleton is located in the precast solid column part (1), and the upper part of the steel reinforcement skeleton is located in the precast hollow column part (2); each of the vertical bars (4) extends from the end of the precast solid column part (1) to the end of the precast hollow column part (2), and the part of each vertical bar (4) extending to the end of the precast hollow column part (2) serves as a connector. The top of each of the vertical ribs (4) is connected to the bottom of the grouting sleeve (6) located in the corresponding connection hole; The bottom of the vertical rib (4) located in the precast solid column part (1) is located in the corresponding connection hole and connected to the top of the corresponding grouting sleeve (6).
5. A novel hollow column according to claim 1, characterized in that, The wall thickness of the prefabricated hollow column part (2) is ≥100mm.
6. A novel hollow column according to claim 1, characterized in that, The prefabricated hollow column part (2) has an exhaust hole on its side wall that communicates with the cavity (3).
7. A novel hollow column according to claim 3, characterized in that, The steel reinforcement cage uses HRB400 grade steel bars, and the concrete grade is C40.
8. A novel hollow column according to claim 2, characterized in that, The grouting sleeve (6) is a Hongqi semi-grouting sleeve (6).
9. A novel hollow column according to claim 1, characterized in that, An observation port (7) is provided on the side wall of the prefabricated hollow column part (2).
10. A novel hollow column according to claim 1, characterized in that, The cross-section of the precast solid column part (1) and the cross-section of the precast hollow column part are square structures with the same length and width, and the cross-section of the cavity (3) is a square hole.