CN211597390U - Reinforcement connection structure of vertical reinforcement in prefabricated shear wall - Google Patents

Abstract

The utility model discloses a steel bar connection structure of vertical steel bars of a prefabricated shear wall, which comprises lower vertical steel bars and upper vertical steel bars, wherein the lower vertical steel bars are embedded in a connecting surface of the lower prefabricated shear wall at intervals, the upper vertical steel bars are embedded in a connecting surface of the upper prefabricated shear wall at intervals, and a plurality of lower vertical steel bars and a plurality of upper vertical steel bars are in one-to-one correspondence from top to bottom; go up vertical reinforcing bar bottom and expand outward and form the last connector that has the external screw thread, the movable sleeve is equipped with the connecting sleeve that has the internal thread hole on the lower vertical reinforcing bar, connecting sleeve with go up connector threaded connection as an organic whole. The utility model has the advantages of simple structure, can realize going up the prefabrication of shear force wall, reduce the cast-in-place volume of job site, shorten construction cycle. During construction, the connection of the upper vertical steel bar and the lower vertical steel bar can be realized only by screwing the connecting sleeve and the upper connector together, and certain tensile stress can be generated at the joint of the upper shear wall and the lower shear wall, so that the crack of the joint can be better controlled, and the quality of the shear wall is ensured.

Description

Reinforcement connection structure of vertical reinforcement in prefabricated shear wall

technical field

The utility model relates to the field of prefabricated concrete construction, in particular to a steel bar connection structure of vertical steel bars of a prefabricated shear wall.

Background technique

In prefabricated concrete structures, the vertical steel bars at the connection nodes of precast concrete vertical members (such as concrete columns or shear walls) need to be connected in a reliable connection mode so that the connection nodes have sufficient strength to meet the design load. Require. At present, the vertical steel bars at the nodes of concrete vertical members often use sleeve grouting technology, that is, the steel bars of the two concrete members are connected together by a sleeve, grouted into the sleeve, and finally the concrete columns or shears are poured by the all-in-place process. The force wall, completes the connection of the two concrete vertical members. Although the above-mentioned construction process has a clear force, it can design the load requirements; but it needs to cast concrete columns or shear walls. The amount of cast-in-place concrete is large, which affects the construction progress and the construction period is long. At the same time, the use of sleeve grouting steel bars The connection method is highly concealed, and it is not easy to control the quality of the connection node, which has potential security risks.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a mechanical connection structure of steel bars for prefabricated shear wall vertical steel bars, which can realize the mechanical connection of steel bars without turning or moving the steel bars.

To achieve the above object, the utility model adopts the following technical solutions:

The steel bar connection structure of the vertical steel bar of the prefabricated shear wall according to the utility model comprises the lower vertical steel bar which is pre-buried in the connection surface of the lower prefabricated shear wall at intervals, and the lower vertical steel bar which is pre-buried in the connection surface of the upper prefabricated shear wall at intervals. upper vertical steel bars, a plurality of the lower vertical steel bars are in one-to-one correspondence with a plurality of the upper vertical steel bars;

The bottom of the upper vertical steel bar is expanded outward to form an upper connecting head, the outer surface of the upper connecting head is provided with an external thread, and a connecting sleeve with an internal threaded hole is movably sleeved on the lower vertical steel bar, and the connecting sleeve and the The upper connecting head is threadedly connected as a whole.

The top of the lower vertical steel bar is outwardly expanded to form a limit head composed of an upper cylindrical section and a lower circular truncated section, which is used to prevent the connecting sleeve from coming out of the lower vertical steel bar.

The outer surface of the connecting sleeve is a regular hexagonal structure.

The utility model has the advantages that the structure is simple, the prefabrication of the upper shear wall can be realized, the cast-in-place amount on the construction site is reduced, and the construction period is shortened. During construction, only the connecting sleeve and the upper connecting head need to be screwed together to realize the connection of the upper vertical steel bar and the lower vertical steel bar, and can make the connection between the upper shear wall and the lower shear wall produce a certain amount of stress. Tensile stress, and then better control of the cracks at the joint, to ensure the quality of the shear wall.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

FIG. 2 is a top view of the connecting sleeve of FIG. 1 .

3-9 are the construction process diagrams of the mechanical connecting structure of steel bars according to the present invention.

FIG. 10 is a schematic cross-sectional structural diagram of FIG. 9 along the A-A direction.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation modes and specific operation processes, but the protection scope of the present invention is not limited to the following described embodiment.

As shown in FIG. 1, the steel bar connection structure of the vertical steel bar of the prefabricated shear wall according to the present invention includes the lower vertical steel bar 2 which is pre-buried in the connecting surface of the lower prefabricated shear wall 1 at intervals, and the lower vertical steel bar 2 which is pre-buried at intervals in the upper part of the prefabricated shear wall 1. The upper vertical steel bars 4 in the connection surface of the prefabricated shear wall 3, a plurality of the lower vertical steel bars 2 are in one-to-one correspondence with a plurality of the upper vertical steel bars 4;

The bottom of the upper vertical steel bar 4 is expanded outward to form an upper connecting head 5, the outer surface of the upper connecting head 5 is provided with an external thread, and the lower vertical steel bar 2 is movably fitted with a connecting sleeve 6 with an internal threaded hole, and the connecting sleeve is 6 and the upper connector 5 is threadedly connected as a whole;

The top of the lower vertical steel bar 2 expands outward to form a limit head 7 composed of an upper cylindrical section and a lower circular table section. The lower part of the connecting sleeve 6 is stuck on the limit head 7 to prevent the connecting sleeve 6 from entering the lower vertical steel bar 2. come out.

As shown in FIG. 2 , in order to facilitate screwing, the outer surface of the connecting sleeve 6 has a regular hexagonal structure.

During actual construction, the concrete construction method of the steel mechanical connection structure described in the present utility model includes the following steps:

In the first step, one end of each upper vertical steel bar 4 is thickened and threaded to form an upper connector 5 with an external thread, and one end of each lower vertical steel bar 2 is thickened to form a lower circular platform section and The limit head 7 composed of the upper cylindrical section, and then the connecting sleeve 6 with the inner threaded hole is pierced from the other end of the lower vertical steel bar 2 to complete the processing operation of the upper vertical steel bar 4 and the lower vertical steel bar 2. Specifically, As shown in Figure 3;

The second step is to prefabricate the upper shear wall. During prefabrication, the upper vertical steel bars 4 processed in the first step are pre-buried at the edge of the connecting surface of the upper shear wall at intervals. An upper mounting hole 8 is reserved at the edge of the upper shear wall to expose the upper connector 5, and its connecting surface is chiseled, as shown in Figure 4;

The third step is to prefabricate the lower shear wall. During prefabrication, the lower vertical steel bars 2 processed in the first step are pre-buried at the edge of the connecting surface of the lower shear wall at intervals. A lower installation hole 9 is reserved at the edge of the lower shear wall to expose the connection sleeve 6 and the limit head 7, and the connection surface is chiseled, as shown in Figure 5;

Among them, in order to facilitate the grouting plugging in the later stage, the top wall of the upper mounting hole 8 is an inclined surface structure extending inwardly from its top, and the cross-sections of the upper mounting hole 8 and the lower mounting hole 9 are trapezoidal structures with wide outer ends and narrow inner ends. , as shown in Figure 9-10;

In actual construction, the upper shear wall and the lower shear wall can also be prefabricated at the same time, or the lower shear wall can be prefabricated first, and then the upper shear wall can be prefabricated;

The fourth step is to apply a layer of mortar on the upper surface of the prefabricated lower shear wall, and then hoist the upper prefabricated shear wall 3 prefabricated in the second step to the lower prefabricated shear wall 1, and the upper vertical steel bar 4 and The lower vertical steel bars 2 are in one-to-one correspondence, as shown in Figure 6;

The upper installation hole 8 and the lower installation hole 9 are connected up and down to form a screwing hole, and then each connecting sleeve 6 is screwed together with its corresponding upper connecting head 5 in turn to complete the upper vertical steel bars 4 and 6. The connection operation of the lower vertical steel bar 2 is shown in Figure 7 in detail.

As shown in Figure 8, after all the upper vertical steel bars 4 and all the lower vertical steel bars 2 are connected, a support is provided at the connection of the lower prefabricated shear wall 1 of the upper prefabricated shear wall 3 to block the upper installation hole 8 and the baffle 10 of the lower installation hole 9, the upper part of the baffle 10 is an inclined surface structure extending obliquely from the top of the prefabricated shear wall 3, which is convenient for grouting; pouring mortar;

As shown in FIG. 9 , after the mortar is solidified, the baffle plate 10 is removed to complete the connection operation of the upper prefabricated shear wall 3 and the lower prefabricated shear wall 1 .

The connection structure of the utility model realizes the factory prefabrication of the upper shear wall and the lower shear wall, and shortens the construction period; only the upper installation hole 8 and the installation hole need to be poured on the construction site, and the wet work is less, which further shortens the construction period. The construction period reduces the difficulty of operation.

The upper vertical steel bar 4 and the lower vertical steel bar 2 of the present invention are connected as a whole by the upper connecting head 5 and the connecting sleeve 6, which can not only realize the upper vertical steel bar 4 and the lower vertical steel bar without rotating or moving the steel bar. The mechanical connection of the vertical steel bars 2 also enables the lower vertical steel bars 2 and the upper vertical steel bars 4 to obtain a certain tensile stress and bear a certain construction load, effectively reducing the on-site support and formwork, and shortening the construction period.

The tensile stress obtained by the upper vertical steel bar 4 and the lower vertical steel bar 2 of the present invention generates corresponding tensile stress at the connection node of the upper prefabricated shear wall 3 and the lower prefabricated shear wall 1, which can better control the two Cracks at the connection of the shear wall are ensured to ensure the quality of the shear wall.

In the description of the present invention, it should be noted that the terms "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position The relationship is based on the orientation or position relationship shown in the drawings, which 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 particular orientation, be constructed and operated in a particular orientation, and therefore It should not be construed as a limitation of the present invention.

Claims (3)

1. a steel bar connection structure of a prefabricated shear wall vertical steel bar, it is characterized in that: comprise the lower vertical steel bar pre-buried in the lower prefabricated shear wall connection surface at intervals, and the interval pre-buried in the upper prefabricated shear wall connection surface the inner upper vertical steel bars, a plurality of the lower vertical steel bars are in one-to-one correspondence with a plurality of the upper vertical steel bars; The bottom of the upper vertical steel bar is expanded outward to form an upper connecting head, the outer surface of the upper connecting head is provided with an external thread, and a connecting sleeve with an internal threaded hole is movably sleeved on the lower vertical steel bar, and the connecting sleeve and the The upper connecting head is threadedly connected as a whole. 2. The steel bar connection structure of the vertical steel bar of the prefabricated shear wall according to claim 1 is characterized in that: the top of the lower vertical steel bar is expanded outward to form a limit head composed of an upper cylindrical section and a lower circular truncated To prevent the connecting sleeve from coming out of the lower vertical steel bar. 3. The steel bar connection structure of the prefabricated shear wall vertical steel bar according to claim 1, wherein the outer surface of the connection sleeve is a regular hexagonal structure.

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