Fabricated concrete prefabricated column

Abstract

The utility model relates to the technical field of assembly type buildings, in particular to an assembly type concrete prefabricated column which comprises a column body, an upper steel plate, a lower steel plate and a rotating piece. The upper steel plate is arranged at the upper end of the column body; an upper sleeve embedded in the column body is arranged on the lower surface of the upper steel plate; the lower steel plate is arranged at the lower end of the column body; a lower sleeve embedded in the column body is arranged on the upper surface of the lower steel plate; the rotating piece is arranged above the upper steel plate, the upper end and the lower end of the rotating piece are provided with right-hand threads and left-hand threads respectively, the upper end of the rotating piece is used for being inserted into the lower sleeve of the upper prefabricated column in a threaded mode, and the lower end of the rotating piece is inserted into the upper sleeve in a threaded mode, so that the upper prefabricated column and the lower prefabricated column can be close to each other till being fixed by rotating the rotating piece. The connecting structure can solve the problem that the shear capacity of the connecting part of the prefabricated column is insufficient.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated buildings, in particular to a precast concrete column for prefabricated buildings. Background Art

[0002] Traditional column structures are mostly cast-in-place structures, while precast columns can reduce waste of resources and shorten the construction period. This method involves prefabricating the columns required for the building in stages at the factory and then transporting them to the site for connection. In order to facilitate connection, the ordinary connection structure has insufficient bearing capacity in some parts. If a spiral connection method is adopted between the upper column and the lower column, the strength is sufficient, but due to the large size of the upper column, the overall rotation is difficult and the construction is not easy. There are certain limitations in combining construction convenience and sufficient bearing capacity.

[0003] Therefore, the patent with the application number CN202122751937.0 discloses a connection structure between precast columns. Although this patent uses steel members similar to bolts to connect the upper and lower columns, which can improve the bearing capacity of the joints and can also achieve spiral connection without rotating the column body, since the connection surface between the steel member and the upper column is only the outer peripheral surface of the fixed clamping plate and the inner peripheral surface of the connecting steel groove, the connection surface is small and the contact area that can be provided is also small, resulting in the connection part not performing ideally in resisting shear force. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a precast concrete column for prefabricated buildings to solve the problem of insufficient shear resistance of the connection part of the precast column.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A precast concrete column for prefabricated buildings includes a column body, an upper steel plate, a lower steel plate and a rotating member; the upper steel plate is arranged at the upper end of the column body, and an upper sleeve embedded in the column body is arranged on the lower surface of the upper steel plate; the lower steel plate is arranged at the lower end of the column body, and a lower sleeve embedded in the column body is arranged on the upper surface of the lower steel plate; the rotating member is arranged above the upper steel plate, and positive and reverse threads are respectively arranged at the upper and lower ends of the rotating member. The upper end of the rotating member is used for being threadedly inserted into the lower sleeve of the upper precast column, and the lower end of the rotating member is threadedly inserted into the upper sleeve, so that rotating the rotating member can make the upper precast column and the lower precast column approach each other until they are fixed.

[0007] As an optional scheme, the rotating member includes a runner and a positive threaded rod and a reverse threaded rod coaxially connected to the upper and lower ends of the runner; the runner is coaxially arranged above the upper steel plate; the positive threaded rod is used for being threadedly inserted into the lower sleeve of the upper precast column, and the reverse threaded rod is threadedly inserted into the upper sleeve.

[0008] As an alternative solution, the length of the positive threaded rod is equal to the length of the lower sleeve; the length of the reverse threaded rod is equal to the length of the upper sleeve.

[0009] As an alternative solution, a plurality of longitudinal steel bars in the column are fixedly penetrated upward through the upper steel plate. A plurality of grouting pipes corresponding to the longitudinal steel bars up and down are arranged at the lower end inside the column. One end of the grouting pipe communicates with the outside of the column, and the other end of the grouting pipe can be sleeved on the longitudinal steel bar of the lower precast column below.

[0010] As an alternative solution, the grouting pipe is in an L shape. One end of the grouting pipe is flush and communicates with the outer peripheral surface of the column. The other end of the grouting pipe is fixedly penetrated downward through the lower steel plate and can be sleeved on the longitudinal steel bar of the lower precast column below as the column descends.

[0011] As an alternative solution, the plurality of longitudinal steel bars and the plurality of grouting pipes are evenly distributed in a ring centered on the axis of the column.

[0012] Due to the adoption of the above technical solution, the present utility model will have the following beneficial effects:

[0013] A precast concrete column provided by the present utility model is provided with positive and reverse threads at the upper and lower ends of a rotating member respectively. The upper end of the rotating member is used for threaded insertion into the lower sleeve of the upper precast column above, and the lower end of the rotating member is threaded into the upper sleeve of the lower precast column below. By rotating the rotating member, the upper precast column and the lower precast column can be made to approach each other until the rotating member is clamped and fixed. Compared with the relatively small connection surface between the steel member and the upper column in the prior art, the connection between the rotating member of the present utility model and the upper precast column and the lower precast column both adopts threaded connection, and the connection surface is larger, so a larger contact area can be provided, thereby enhancing the shear resistance of the connection part of the precast column. And because the rotating member can generate pre-tightening forces on the upper precast column and the lower precast column respectively, the shear resistance can be further enhanced. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a perspective view of the precast concrete column according to the embodiment of the present utility model;

[0016] Figure 2 For Figure 1Exploded view of the precast concrete column described in the embodiment in the hidden state of the column body;

[0017] Figure 3 For Figure 1 Front view of the precast concrete column described in the embodiment in the use state;

[0018] Figure 4 For Figure 1 Partial cross-sectional view of the connection part of the precast concrete column described in the embodiment.

[0019] Reference numerals: 1, column body; 11, longitudinal steel bars; 12, grouting pipe; 2, upper steel plate; 21, upper sleeve; 3, lower steel plate; 31, lower sleeve; 4, rotating member; 41, runner; 42, right-handed threaded rod; 43, left-handed threaded rod. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] Please refer to Figures 1-4, in an embodiment of an assembled concrete precast column of the present utility model, the assembled concrete precast column includes a column body 1, an upper steel plate 2, a lower steel plate 3, and a rotating member 4; wherein, the column body 1 plays a supporting role, and longitudinal steel bars 11 are embedded in the column body 1; the upper steel plate 2 is arranged on the upper end face of the column body 1, and an upper sleeve 21 embedded in the column body 1 is integrally formed in the middle of the lower surface of the upper steel plate 2, and the upper sleeve 21 communicates with the upper surface of the upper steel plate 2; the lower steel plate 3 is arranged on the lower end face of the column body 1, and a lower sleeve 31 embedded in the column body 1 is integrally formed on the upper surface of the lower steel plate 3, and the lower sleeve 31 communicates with the lower surface of the lower steel plate 3; the rotating member 4 is arranged above the upper steel plate 2, and positive and negative threads are respectively arranged at the upper and lower ends of the rotating member 4. The upper end of the rotating member 4 is used for threaded insertion into the lower sleeve 31 of the upper precast column, and the lower end of the rotating member 4 is threaded into the upper sleeve 21, so that rotating the rotating member 4 can make the upper precast column and the lower precast column approach each other until they are fixed.

[0024] It should be noted that for two assembled concrete precast columns of this embodiment connected up and down, the assembled concrete precast column located above is referred to as the upper precast column, and the assembled concrete precast column located below is referred to as the lower precast column.

[0025] Specifically, the rotating member 4 includes a runner 41 and a positive threaded rod 42 and a reverse threaded rod 43 coaxially and fixedly connected to the upper and lower ends of the runner 41; the runner 41 is coaxially rotatably arranged above the upper steel plate 2; the positive threaded rod 42 is used for threaded insertion into the lower sleeve 31 of the upper precast column, and the reverse threaded rod 43 is threaded into the upper sleeve 21. Since the thread rotation directions of the positive threaded rod 42 and the reverse threaded rod 43 are opposite, rotating the runner 41 forward can synchronously tighten the positive threaded rod 42 and the reverse threaded rod 43, so that the upper precast column approaches the lower precast column under the action of the thread until the runner 41 is clamped and fixed; rotating the runner 41 in the reverse direction can synchronously loosen the positive threaded rod 42 and the reverse threaded rod 43, so that the upper precast column and the lower precast column move away from the runner 41 under the action of the thread until they are disengaged from the positive threaded rod 42 and the reverse threaded rod 43.

[0026] More specifically, the length of the positive threaded rod 42 can be set to be equal to the length of the lower sleeve 31, and the length of the reverse threaded rod 43 can be set to be equal to the length of the upper sleeve 21, so as to increase the threaded connection surface as much as possible, thereby further increasing the shear resistance of the connection part of the precast column.

[0027] Specifically, multiple longitudinal steel bars 11 in the column body 1 are fixed upward, penetrate the upper steel plate 2 and are welded to the upper steel plate 2. A plurality of grouting pipes 12 corresponding to the longitudinal steel bars 11 are provided at the lower end of the column body 1. One end of the grouting pipe 12 is connected to the outside of the column body 1, and the other end of the grouting pipe 12 can be sleeved on the longitudinal steel bars 11 of the prefabricated column below. When in use, the grouting pipe 12 is used outside the column body 1 to cast the end of the longitudinal steel bar 1 extending out of the upper steel plate 2, so as to improve the strength of the connection part of the prefabricated column.

[0028] More specifically, the grouting pipe 12 is L-shaped, one end of the grouting pipe 12 is flush with and connected to the outer circumferential surface of the column 1, and the other end of the grouting pipe 12 is welded downward and welded to the lower steel plate 3. The end of the grouting pipe 12 extending out of the lower steel plate 3 can be sleeved on the longitudinal steel bar 11 of the prefabricated column below as the column 1 descends.

[0029] More specifically, the plurality of longitudinal steel bars 11 and the plurality of grouting pipes 12 may be arranged to be evenly distributed in a ring shape with the axis of the column 1 as the center, so that the forces on the upper steel plate 2 and the lower steel plate 3 are more balanced, thereby improving stability.

[0030] The usage method or working principle of the utility model is as follows:

[0031] During production, the rotating part 4 is first connected to the middle part of the upper steel plate 2, and then the longitudinal steel bars 11 are penetrated and welded to the outer periphery of the upper steel plate 2, and then the grouting pipes 12 are penetrated and welded to the outer periphery of the lower steel plate 3 corresponding to the longitudinal steel bars 11 respectively, and finally the column body 1 is cast to form an assembled concrete precast column of this embodiment.

[0032] When installing on the lower prefabricated column, first use a crane or other lifting equipment to lift the upper prefabricated column and align the lower sleeve 31 with the positive thread rod 42 (multiple connection points between the lifting equipment and the upper prefabricated column can be set to prevent the upper prefabricated column from rotating horizontally); then use a rotating mechanical arm or other tool to rotate the wheel 41 to synchronously tighten the positive thread rod 42 and the reverse thread rod 43. Since the lower prefabricated column is fixed and the upper prefabricated column is restricted from rotating horizontally, the upper prefabricated column can approach the lower prefabricated column under the action of the thread until it is aligned with the lower prefabricated column. The square precast column is fixed with the clamping wheel 41. At this time, the end of the grouting pipe 12 extending out of the lower steel plate 3 is sleeved on the longitudinal reinforcement 11 of the lower precast column as the upper precast column descends; finally, a baffle is installed around the outer periphery of the gap between the upper precast column and the lower precast column, and concrete is poured on the longitudinal reinforcement 11 of the lower precast column through the grouting pipe 12. With the blocking of the baffle, the concrete can fill the gap between the upper precast column and the lower precast column. After the concrete solidifies, the upper precast column and the lower precast column are connected.

[0033] When installed on the base, the base can be made into a structure that is the same as the bottom of an assembled concrete prefabricated column in this embodiment.

[0034] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. An assembled concrete precast column, characterized in that, It includes a column body (1), an upper steel plate (2), a lower steel plate (3) and a rotating member (4); the upper steel plate (2) is arranged at the upper end of the column body (1), and an upper sleeve (21) embedded in the column body (1) is provided on the lower surface of the upper steel plate (2); the lower steel plate (3) is arranged at the lower end of the column body (1), and a lower sleeve (31) embedded in the column body (1) is provided on the upper surface of the lower steel plate (3); the rotating member (4) is arranged above the upper steel plate (2), positive and negative threads are respectively provided at the upper and lower ends of the rotating member (4), the upper end of the rotating member (4) is used for being threadedly inserted into the lower sleeve (31) of the upper precast column, and the lower end of the rotating member (4) is threadedly inserted into the upper sleeve (21), so that rotating the rotating member (4) can make the upper precast column and the lower precast column approach each other until they are fixed.

2. The precast concrete column according to claim 1, characterized in that, The rotating member (4) includes a runner (41) and a positive threaded rod (42) and a reverse threaded rod (43) coaxially connected to the upper and lower ends of the runner (41); the runner (41) is coaxially arranged above the upper steel plate (2); the positive threaded rod (42) is used for being threadedly inserted into the lower sleeve (31) of the upper precast column, and the reverse threaded rod (43) is threadedly inserted into the upper sleeve (21).

3. The prefabricated concrete column according to claim 2, characterized in that The length of the positive threaded rod (42) is equal to the length of the lower sleeve (31); the length of the reverse threaded rod (43) is equal to the length of the upper sleeve (21).

4. A precast concrete column assembled type according to claim 1, characterized in that, Multiple longitudinal steel bars (11) in the column body (1) are fixedly penetrated upward through the upper steel plate (2), and multiple grouting pipes (12) corresponding to the longitudinal steel bars (11) up and down are provided at the lower end in the column body (1), one end of the grouting pipe (12) communicates with the outside of the column body (1), and the other end of the grouting pipe (12) can be sleeved on the longitudinal steel bar (11) of the lower precast column.

5. A precast concrete column assembled type according to claim 4, characterized in that, The grouting pipe (12) is in an L shape, one end of the grouting pipe (12) is flush and communicates with the outer peripheral surface of the column body (1), and the other end of the grouting pipe (12) is fixedly penetrated downward through the lower steel plate (3) and can be sleeved on the longitudinal steel bar (11) of the lower precast column as the column body (1) descends.

6. The precast concrete column assembled type according to claim 5, characterized in that, The multiple longitudinal steel bars (11) and the multiple grouting pipes (12) are both annularly and uniformly distributed around the axis of the column body (1).

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