CN219622106U - Slowly bond prestressing force structural beam - Google Patents

Abstract

The utility model discloses a slow-bonding prestressed structure beam, which belongs to the technical field of prestressed structure beams and comprises a cross beam, prestressed tendons, a fixed end, a tensioning end and a positioning assembly; the cross beam is a reinforced concrete structure, and vertical steel bars are arranged in the cross beam at intervals; the prestress rib is inserted into the cross beam, and the whole prestress rib is curved; the fixed end and the tensioning end are respectively arranged at the left end and the right end of the prestressed tendon; the positioning assembly comprises a vertical sleeve, a connecting rod, a horizontal sleeve and a positioning pipe; the vertical sleeve is arranged on the vertical steel bar; two ends of the connecting rod are respectively connected with two adjacent vertical sleeves; the transverse sleeve is arranged on the connecting rod; the positioning pipe is fixedly connected with the transverse sleeve, and the prestressed tendons are arranged in the positioning pipe in a penetrating way. According to the utility model, the vertical sleeve is matched with the horizontal sleeve, so that the horizontal and longitudinal positioning positions can be accurately controlled, and the positioning at the key position of prestress rib position control is ensured; the positioning tube is an arc tube body with large caliber at two ends and small caliber in the middle, and the self structure of the prestressed tendon can be prevented from being damaged.

Description

Slowly bond prestressing force structural beam

Technical Field

The utility model belongs to the technical field of prestressed structural beams, and particularly relates to a slow-bonding prestressed structural beam.

Background

Along with the increasing of the engineering technology level, the demands of the domestic building market on the large-span space structure are gradually increased, and the prestress structure beam technology has the characteristics of small dead weight, high rigidity, cracking resistance, high deformation resistance and the like, and has good adaptability to the large-span and large-load structure. The slow-bonding prestress refers to that the prestress steel strand is free to stretch and deform and does not bond with surrounding retarding adhesives in the construction stage, and the prestress rib generates bonding effect with surrounding concrete through the solidified retarding adhesives in a preset period after the construction is completed. The slow-bonding prestress is flexible to arrange, does not need to penetrate corrugated pipes or grouting, and has wide application prospect.

In the prior art, in order to offset bending moment of the structural beam in use, cracks are avoided, stability of the whole structure is improved, and the prestress rib is often designed to be curved. The prestress rib is often positioned by binding with the steel bar in the beam, and the method for binding and positioning the steel bar has the following problems: the key position of the prestress rib shape control is difficult to correspond to the height of the steel bar, so that the binding tends to deviate from the key position to influence the shape precision of the prestress rib; in the construction process, when the prestress rib needs to be adjusted, the steel wire needs to be removed again, and the prestress rib is bound again, so that time and labor are wasted; and the prestress rib structure is easily damaged by adjusting and tensioning after binding the steel bars.

Disclosure of Invention

The utility model aims to provide a slow-bonding prestressed structural beam, which solves the problems that the key position of the prestress rib configuration control cannot be accurately positioned in the background technology, the prestress rib needs to be rebuckled during adjustment, and the self structure of the prestress rib is easy to damage after the binding.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a slow-bonding prestressed structure beam comprises a cross beam, prestressed tendons, a fixed end, a tensioning end and a positioning assembly; the cross beam is of a reinforced concrete structure, and vertical steel bars are arranged in the cross beam at intervals; the prestress rib is inserted into the cross beam, and the whole prestress rib is curved; the fixed end and the tensioning end are respectively arranged at the left end and the right end of the prestressed tendon; the positioning assembly comprises a vertical sleeve, a connecting rod, a horizontal sleeve and a positioning pipe; the vertical sleeve is arranged on the vertical steel bar; two ends of the connecting rod are respectively connected with two adjacent vertical sleeves; the transverse sleeve is arranged on the connecting rod; the positioning pipe is fixedly connected with the transverse sleeve, and the prestressed tendons are arranged in the positioning pipe in a penetrating mode.

Further, a threaded hole is formed in the transverse sleeve, a fixing bolt is arranged in the threaded hole, and the transverse sleeve is connected with the connecting rod through the fixing bolt.

Further, the positioning tube is an arc-shaped tube body with large caliber at two ends and small caliber in the middle.

Further, the top of the vertical sleeve is provided with a hoop, and the hoop is fixedly connected with the vertical steel bars.

Further, the fixed end is arranged in the cross beam and comprises an extrusion anchor and a first bearing plate; the first bearing plate is arranged on the inner side of the extrusion anchor.

Further, the tensioning end is arranged in the cross beam and comprises a clamping piece anchorage device, a second bearing plate and a cavity die; the second bearing plate is arranged on the inner side of the clamping piece anchorage device; the cavity die is arranged on the outer side of the clamping piece anchorage device.

Further, spiral ribs are arranged on the inner side of the first bearing plate and the inner side of the second bearing plate, and the spiral ribs are sleeved on the prestress ribs.

The utility model has the following beneficial effects:

1. according to the slow bonding prestress structure beam, the transverse positioning position and the longitudinal positioning position can be accurately controlled through the cooperation of the vertical sleeve and the horizontal sleeve, positioning at the key position of prestress rib position control is guaranteed, and the arrangement precision of prestress ribs is further improved.

2. According to the slow bonding prestress structure beam, the positioning pipe is arranged into the arc-shaped pipe body with the large caliber at the two ends and the small caliber in the middle, so that the self structure of the prestress rib can be prevented from being damaged in the tensioning process, and meanwhile, the prestress rib position is adjusted without repeated binding, so that time and labor are saved.

3. The slow-bonding prestressed structural beam provided by the utility model can simplify the construction steps, reduce the construction difficulty, improve the construction precision, has a simple structure, is easy to popularize and apply, and has good economic benefit.

Drawings

FIG. 1 is a schematic view of the overall structure of a prestressed structural beam according to the present utility model;

FIG. 2 is a schematic structural view of a fixed end according to the present utility model;

FIG. 3 is a schematic view of the structure of a tensioning end according to the present utility model;

FIG. 4 is an enlarged view of the structure at A in FIG. 1 according to the present utility model;

fig. 5 is a schematic diagram of the connection of the transverse sleeve and the positioning tube according to the present utility model.

In the figure: the device comprises a beam 1, a vertical steel bar 11, a prestress rib 2, a fixed end 3, a pressing anchor 31, a first bearing plate 32, a tensioning end 4, a clamping piece anchor 41, a second bearing plate 42, a cavity die 43, a positioning component 5, a vertical sleeve 51, a hoop 52, a connecting rod 53, a horizontal sleeve 54 and a positioning pipe 55.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the slow bonding prestress structure beam provided by the utility model comprises a cross beam 1, prestress ribs 2, a fixed end 3, a tensioning end 4 and a positioning assembly 5; the beam 1 is a reinforced concrete structure, and vertical steel bars 11 are arranged in the beam at intervals; the prestress rib 2 is inserted into the cross beam 1, and the whole prestress rib is arranged in a curve shape; the fixed end 3 and the tensioning end 4 are respectively arranged at the left end and the right end of the prestressed tendon 2; the positioning assembly 5 comprises a vertical sleeve 51, a hoop 52, a connecting rod 53, a horizontal sleeve 54 and a positioning pipe 55, wherein the vertical sleeve 51 is sleeved on the vertical steel bar 11; the anchor ear 52 is fixedly arranged on the vertical sleeve 51 and fixedly connected with the vertical steel bar 11, so that the vertical sleeve 51 is fixed; the two ends of the connecting rod 53 are respectively connected with the two adjacent vertical sleeves 51; the transverse sleeve 54 is sleeved on the connecting rod 53; the positioning pipe 55 is fixedly connected with the transverse sleeve 54, and the prestressed tendons 2 are arranged in the positioning pipe 55 in a penetrating mode, so that the position positioning of the prestressed tendons 2 is realized.

The tendons 2 are preferably steel strands which are integrally formed as lower bending lines to overcome bending moments of the beam 1 in use.

As shown in fig. 2, the fixed end 3 is disposed in the cross beam 1, and includes a pressing anchor 31 and a first bearing plate 32; the first bearing plate 32 is provided on the inner side (side near the middle of the cross member 1) of the pressing anchor 31. Preferably, a spiral rib is arranged on the inner side of the first bearing plate 32, and the spiral rib is sleeved on the prestress rib 2.

As shown in fig. 3, the tensioning end 4 is disposed in the cross beam 1 and includes a clip anchor 41, a second bearing plate 42 and a cavity die 43; the second bearing plate 42 is arranged on the inner side of the clip anchorage 41; the cavity die 43 is provided outside the clip anchor 41 to provide operating space for subsequent tensioning. Preferably, a spiral rib is arranged on the inner side of the second bearing plate 42, and the spiral rib is sleeved on the prestress rib 2.

As shown in fig. 4 and 5, the positioning assembly 5 is provided with a plurality of groups, so that the configuration control of the prestressed tendons 2 is realized. The anchor ear 52 is arranged at the top of the vertical sleeve 51, the vertical sleeve 51 can move up and down along the vertical steel bar 11, and after the vertical sleeve 51 is adjusted to a specified height, the anchor ear 52 is locked, so that the fixing of the vertical sleeve 51 is realized. The transverse sleeve 54 is provided with a threaded hole, a fixing bolt is arranged in the threaded hole, the transverse sleeve 54 can slide along the connecting rod 53, and after the transverse sleeve 54 is adjusted to be designated as a shaft, the fixing bolt is screwed, so that the fixing of the transverse sleeve 54 is realized. Through the cooperation of vertical sleeve 51 and horizontal sleeve 54, horizontal and vertical location position can be accurately controlled, location is guaranteed to the key position department of 2 configuration control of prestressing tendons, and then the laying accuracy of prestressing tendons 2 improves. The positioning tube 55 is fixedly connected with the transverse sleeve 54 through a transverse rod, and the positioning tube 55 is an arc-shaped tube body with large caliber at two ends and small caliber in the middle, so that the self structure of the prestressed tendon 2 is prevented from being damaged in the tensioning process.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (7)

1. The utility model provides a slow bonding prestressing force structural beam which characterized in that: comprises a cross beam (1), a prestressed tendon (2), a fixed end (3), a tensioning end (4) and a positioning assembly (5); the beam (1) is of a reinforced concrete structure, and vertical steel bars (11) are arranged in the beam at intervals; the prestress rib (2) is inserted into the cross beam (1), and the whole prestress rib is curved; the fixed end (3) and the tensioning end (4) are respectively arranged at the left end and the right end of the prestressed tendon (2); the positioning assembly (5) comprises a vertical sleeve (51), a connecting rod (53), a horizontal sleeve (54) and a positioning tube (55); the vertical sleeve (51) is arranged on the vertical steel bar (11); two ends of the connecting rod (53) are respectively connected with two adjacent vertical sleeves (51); the transverse sleeve (54) is arranged on the connecting rod (53); the positioning pipe (55) is fixedly connected with the transverse sleeve (54), and the prestressed tendons (2) are arranged in the positioning pipe (55) in a penetrating mode.

2. A slow bonding prestressed structure girder as claimed in claim 1, wherein: the transverse sleeve (54) is provided with a threaded hole, a fixing bolt is arranged in the threaded hole, and the transverse sleeve (54) is connected with the connecting rod (53) through the fixing bolt.

3. A slow bonding prestressed structure girder as claimed in claim 1, wherein: the positioning pipe (55) is an arc pipe body with large caliber at two ends and small caliber in the middle.

4. A slow bonding prestressed structure girder as claimed in claim 1, wherein: the top of the vertical sleeve (51) is provided with a hoop (52), and the hoop (52) is fixedly connected with the vertical steel bar (11).

5. A slow bonding prestressed structure girder as claimed in claim 1, wherein: the fixed end (3) is arranged in the cross beam (1) and comprises an extrusion anchor (31) and a first bearing plate (32); the first bearing plate (32) is arranged on the inner side of the extrusion anchor (31).

6. A slow bonding prestressed structure girder as claimed in claim 5, wherein: the tensioning end (4) is arranged in the cross beam (1) and comprises a clamping piece anchorage device (41), a second bearing plate (42) and a cavity die (43); the second bearing plate (42) is arranged on the inner side of the clamping piece anchorage device (41); the cavity die (43) is arranged on the outer side of the clamping piece anchorage device (41).

7. A slow bonding prestressed structure girder as claimed in claim 6, wherein: spiral ribs are arranged on the inner side of the first bearing plate (32) and the inner side of the second bearing plate (42), and the spiral ribs are sleeved on the prestress ribs (2).