CN215484089U

CN215484089U - Fixed end anchoring assembly

Info

Publication number: CN215484089U
Application number: CN202121552502.7U
Authority: CN
Inventors: 郝玉柱; 柏国清; 束永胜
Original assignee: Vsl Engineering Co ltd
Current assignee: Vsl Engineering Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2022-01-11
Anticipated expiration: 2031-07-08

Abstract

The utility model belongs to the technical field of building construction, and relates to a fixed end anchoring assembly which comprises an anchor backing plate and a cover cap which are pre-embedded in an anchoring seat, wherein a nut which is in threaded fit with a threaded steel bar is fixedly connected to the anchor backing plate. The utility model adopts a simple structure to realize the detachable connection of the twisted steel and the anchoring assembly embedded at the fixed end, and the connection of the twisted steel and the anchoring assembly is convenient and reliable. During construction, the twisted steel bar can be connected with the anchoring assembly embedded at the fixed end after the anchoring seat is poured, so that the prestressed reinforcement is prevented from being damaged during construction. Before the threaded steel bar is connected, the nut is reamed, so that mortar blocking the nut can be prevented from influencing the connection between the prestressed reinforcement and the nut, and the reliability of a prestressed system is further ensured.

Description

Fixed end anchoring assembly

Technical Field

The utility model belongs to the technical field of building construction, and relates to a fixed end anchoring assembly.

Background

In the conventional construction of a prestressed system, a prestressed tendon and a fixed-end anchor are generally connected firstly, the fixed-end anchor is embedded in a component, and the other end of the prestressed tendon is pulled by equipment to ensure the posture of the prestressed tendon. If the member is bulky like this, the complex and complicated construction of pulling of prestressing tendons, and the prestressing tendons that can't change expose for a long time, damage or rust take place easily in the work progress.

Chinese patent document CN102392415A discloses a vertical prestressed anchoring system and its construction method, which discloses a construction method that a lower anchor backing plate 3, a grouting cover 12 and an embedded pipeline 5 are embedded before concrete is poured, and after the concrete is poured, the prestressed tendons and the lower anchoring units are sent into the grouting cover 12. However, in the concrete pouring process, mortar needs to be vibrated, disturbed mortar easily enters the embedded pipeline from the damaged port of the embedded pipeline or the joint of the embedded pipeline and the fixed end anchorage device, and after the mortar enters the grouting cover and is solidified, the lower end anchoring unit can not enter the grouting cover, so that the prestressed tendons cannot be matched with the lower anchor base plate, the prestress cannot be applied to the member, and the structural safety of the building is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fixed end anchoring assembly capable of ensuring reliable connection of a prestressed tendon and an anchoring end.

In order to realize the purpose, the utility model adopts the technical scheme that: a fixed end anchoring assembly comprises an anchor backing plate and a cover cap which are pre-embedded in an anchoring seat, and a nut which forms thread fit with a threaded steel bar is fixedly connected to the anchor backing plate.

The utility model adopts a simple structure to realize the detachable connection of the twisted steel and the anchoring assembly embedded at the fixed end, and the connection of the twisted steel and the anchoring assembly is convenient and reliable. During construction, the twisted steel bar can be connected with the anchoring assembly embedded at the fixed end after the anchoring seat is poured, so that the prestressed reinforcement is prevented from being damaged during construction. Before the threaded steel bar is connected, the nut is reamed, so that mortar blocking the nut can be prevented from influencing the connection between the prestressed reinforcement and the nut, and the reliability of a prestressed system is further ensured.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic view of a fixed end assembly in use;

FIG. 2 is a schematic view of the positioning rod and the pre-buried assembly;

FIG. 3 is a schematic view of a positioning rod;

FIG. 4 is a schematic view of the tap rod engaged with the fastener driving assembly;

FIG. 5 is a schematic view of a tap rod;

FIG. 6 is a schematic view of the engagement of the rebar with the post-reaming anchor assembly;

FIG. 7 is a schematic view of completion of anchoring construction and grouting plugging;

fig. 8 and 9 are schematic views of the anchor pad and nut.

In the figure: A. the anchor rod comprises an anchor seat, a B threaded steel bar, 10 anchor backing plates, 11 through holes, 12 positioning rings, 21 cover caps, 22 cable penetrating pipes, 30 nuts, 31 connecting holes, 40 positioning rods, 41 plugs, 41a positioning portions, 41b plugging portions, 42 positioning blocks, 50 tap rods, 51 tap rod bodies, 52 taps and 53 handles.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

A fixed end anchoring assembly comprises an anchor backing plate 10 and a cover cap 21 which are pre-embedded in an anchoring seat A, and a nut 30 which forms a threaded fit with a threaded reinforcing steel bar B is fixedly connected to the anchor backing plate 10. The nut 30 is in threaded fit with the threaded steel bar B, so that reliable connection of the threaded steel bar B and the anchor backing plate 10 can be guaranteed. The twisted steel bar is detachably connected with the nut 30, and the connection between the twisted steel bar and the nut is convenient and reliable. During construction, the twisted steel bar can be connected with the anchoring assembly embedded at the fixed end after the anchoring seat is poured, so that the prestressed reinforcement is prevented from being damaged during construction.

As shown in fig. 1, the nut 30 is fixedly connected to the lower plate surface of the anchor backing plate 10 and is located in the cavity of the cap 21, and the connecting hole 31 of the nut 30 is communicated with the through hole 11 in the middle of the anchor backing plate 10 for the twisted steel B to pass through.

In a preferred scheme, as shown in fig. 8, the upper hole edge of the through hole 11 on the anchor backing plate 10 protrudes upwards to form a positioning ring 12, and the positioning ring 12 forms an annular barrier wall to prevent mortar from entering the connecting hole 31 of the nut 30 from the opening edge of the through hole 11, so as to further prevent the mortar from entering the through hole 11 and the connecting hole 31.

In another embodiment, as shown in fig. 9, the middle plate body of the anchor pad 10 extends upwards and downwards to form a nut 30, the nut 30 and the anchor pad 10 are of an integral structure, and a connecting hole 31 in the middle of the nut 30 penetrates through the plate body of the anchor pad 10.

Example one

A prestressed system construction method applying the fixed end anchoring assembly comprises the following steps:

A. installing a pre-buried assembly, wherein the pre-buried assembly comprises the fixed end assembly;

specifically, as shown in fig. 1, the cap 21, the anchor backing plate 10 and the rope penetrating pipe 22 are connected in sequence and embedded in the anchoring seat a, and the through hole 11 of the anchor backing plate 10 and the connecting hole 31 of the nut 30 are communicated with the pipe hole of the rope penetrating pipe 22 and the inner cavity of the cap 21. In the embodiment, the rope-penetrating pipe 22 is a corrugated pipe pre-embedded in the structure and used for the penetration of the prestressed tendons to connect the anchorage assemblies at the two ends.

B. Pouring mortar into the die of the anchoring seat A;

C. reaming the nut 30; the mortar blocking the nut is prevented from influencing the connection between the prestressed tendon and the nut;

reaming operation As shown in FIG. 4, the nut 30 is reamed by inserting a threaded rod 50 from the outer end of the reeving tube 22 into the fixed end anchor assembly. The shank of the tap rod 50 is a clearance fit with the reeving pipe 22 to facilitate the reaming operation. The tap rod 50 is specifically shown in fig. 5, the bottom end of the tap rod is provided with a tap 52, the top end of the tap rod is provided with a handle 53, and the tap rod body 51, the tap 52 and the handle 53 are in synchronous rotating fit.

D. Connecting the threaded steel bar B with the nut 30;

specifically, as shown in fig. 6, the rebar B is inserted into the fixed end anchor assembly from the outer end of the reeving tube 22, and the rebar B is screwed to connect the rebar B with the nut 30.

E. And tensioning the anchoring mechanism to finish anchoring construction.

Example two

The difference between the embodiment and the first embodiment is that the step B includes a step B0 before the step B, the positioning rod 40 is installed, and the positioning rod 40 is inserted into the cable penetrating pipe 22, so that the bottom end of the positioning rod seals the top end face of the nut 30, thereby preventing mortar from entering the nut 30.

Step C includes a step C0 of removing the positioning rod 40 before step C.

As shown in fig. 2, the positioning rod 40 is matched with the embedded assembly, so that the reeving pipe 22 can be reliably supported and positioned after the embedded assembly is installed, and when mortar is poured, the end face of the nut 30 is blocked by one end of the positioning rod 40, so that mortar can be effectively prevented from entering the fixed end anchoring assembly. Specifically, as shown in fig. 3, a plug 41 is disposed at the bottom end of the positioning rod 40, and the plug 41 includes a positioning portion 41a inserted into the connecting hole 31 and a blocking portion 41b at the top end surface of the gland nut 30; a positioning block 42 is arranged on the middle or upper rod body of the positioning rod 40, and the outer contour of the positioning block 42 is matched with the inner contour of the cable penetrating pipe 22.

And E, after the tensioning end of the twisted steel B is tensioned and fixed, pouring concrete into the fixed end anchoring assembly and the cable penetrating pipe 22 to complete the anchoring construction of the prestressed system.

EXAMPLE III

a1, sequentially connecting the cap 21, the anchor backing plate 10 and the reeving pipe 22 and embedding the anchor backing plate, the anchor backing plate 10 and the reeving pipe 22 in the anchoring seat A, wherein the through hole 11 of the anchor backing plate 10 and the connecting hole 31 of the nut 30 are communicated with the pipe hole of the reeving pipe 22 and the inner cavity of the cap 21, and A2 is connected with the threaded steel bar B and the nut 30.

B. Pouring mortar into the die of the anchoring seat A;

c1, judging whether the twisted steel bar B is damaged, if the twisted steel bar B is damaged, replacing the twisted steel bar B, and if the twisted steel bar B is intact, entering the step C2;

c2, reaming the nut 30 by using the screw taper rod 50 to avoid mortar blocking the nut from influencing the connection of the prestressed tendon and the nut;

D. and tensioning the anchoring mechanism to finish anchoring construction.

Claims

1. The utility model provides a stiff end anchor subassembly, includes pre-buried anchor backing plate (10) and block (21) in anchor seat (A), its characterized in that: and the nut (30) which forms thread fit with the thread steel bar (B) is fixedly connected on the anchor backing plate (10).

2. The fixed end anchor assembly of claim 1, wherein: the nut (30) is fixedly connected to the lower plate surface of the anchor backing plate (10) and is positioned in the containing cavity of the cap (21), and the connecting hole (31) of the nut (30) is communicated with the through hole (11) in the middle of the anchor backing plate (10).

3. The fixed end anchor assembly of claim 2, wherein: the upper hole edge of the through hole (11) on the anchor backing plate (10) extends upwards to form a positioning ring (12).

4. The fixed end anchor assembly of claim 1, wherein: the middle plate body of the anchor backing plate (10) extends upwards and downwards to form a nut (30), the nut (30) and the anchor backing plate (10) are of an integrated structure, and a connecting hole (31) in the middle of the nut (30) penetrates through the plate body of the anchor backing plate (10).