CN205475223U - High prestressed anchorage pole of area inflation cover - Google Patents

Abstract

The utility model relates to a high prestressed anchor rod with an expansion sleeve, which belongs to the field of anchor rods. The utility model comprises an anchor rod body, an anchor rod head, an anchor rod thread part, an anchor rod expansion sleeve, an opening groove, an anchor rod sleeve, an anchor rod tray, a grouting hole and a nut; one end of the anchor rod body is an anchor rod head, and the other One end is the threaded portion of the anchor rod, and the anchor rod body is encased by the anchor rod expansion sleeve, the anchor rod sleeve, and the anchor rod tray in the middle. One end of the anchor head is provided with an opening slot along the axial direction of the anchor; the anchor tray is provided with a grouting hole; the anchor head is in the shape of an inverted wedge, and the maximum diameter of the head is larger than the inner hole of the anchor expansion sleeve diameter. The utility model realizes high prestress and at the same time guarantees the anchoring force of the anchor rod; the expansion sleeve of the anchor rod is simple to process, and the reusable anchor rod sleeve saves cost and has high economic benefits; the distribution of the anchor rod can be reduced under the same support conditions Density and thus reduce the construction workload.

Description

A High Prestressed Anchor Rod with Expansion Sleeve

technical field

The utility model relates to a high prestressed anchor rod with an expansion sleeve, which belongs to the field of anchor rods.

Background technique

With the great development of expressway construction in my country, the demand for road construction in complex terrain such as plateaus and mountains is increasing year by year, and slope support is widely used. Although the various anchor rods currently generally used have obvious effects, there are still drawbacks. The main performances are as follows: 1. The installation is troublesome and the cost is high; 2. There is no initial tensile strength; 3. It is impossible to achieve long-term high prestress. For example, the expandable anchor rod proposed in the 201510219653.3 utility model patent designs an expandable anchor rod sleeve, but because the anchor rod sleeve covers the entire anchor rod, its length is too long, resulting in waste of materials.

To sum up, it is necessary to provide a more economical, longer-lasting and high-prestressed anchor structure according to the existing construction technology level.

Contents of the invention

The utility model provides a high prestressed anchor rod with an expansion sleeve, which is used to solve the problem of high device cost at present.

The technical scheme of the utility model is: a high prestressed anchor rod with an expansion sleeve, including an anchor rod body 1, an anchor rod head 1a, an anchor rod thread part 1b, an anchor rod expansion sleeve 2, an opening groove 2a, and an anchor rod sleeve Pipe 3, anchor tray 4, grouting hole 4a, nut 5;

One end of the anchor rod body 1 is the anchor rod head 1a, the other end is the anchor rod threaded part 1b, and the anchor rod body 1 is encased by the anchor rod expansion sleeve 2, the anchor rod sleeve 3, and the anchor rod tray 4 in sequence in the middle, and the anchor rod body 1 is encased in sequence. The rod threaded part 1b passes through the anchor rod tray 4 and is threadedly connected with the nut 5, and the anchor rod tray 4 is provided with a grouting hole 4a;

The anchor head 1a is in the shape of an inverted wedge, and the maximum diameter of the head is larger than the diameter of the inner hole of the anchor expansion sleeve 2 .

The anchor rod expansion sleeve 2 is provided with a plurality of opening grooves 2a along the anchor rod axial direction at one end close to the anchor rod head 1a.

The working process of the present utility model is:

Put the anchor rod equipped with anchor rod expansion sleeve 2 and anchor cable sleeve 3 into the drilled hole (the anchor rod sleeve 3 is used to resist the anchor rod expansion sleeve 2 and anchor rod tray 4), and then rotate Tighten the nut 5, when the anchor rod head 1a and the anchor rod expansion sleeve 2 slide relative to each other, the anchor rod expansion sleeve 2 is expanded by the expansion force of the anchor rod head 1a, and the anchor rod expansion sleeve 2 and the hole wall generate a strong friction force and Self-locking is formed, and then the bolt casing 3 is removed, and grout is injected into the hole from the grouting hole 4a. After solidification, the anchoring force can be increased to achieve the effect of increasing the prestress of the bolt.

The beneficial effects of the utility model are:

1. Provide a new type of anchor structure with expansion sleeve for anchor support, which can achieve high prestress and ensure the anchoring force of the anchor;

2. The anchor rod expansion sleeve is easy to process, and the reusable anchor rod sleeve saves costs and has high economic benefits;

3. Higher prestress is provided, which can reduce the distribution density of bolts under the same support conditions and thus reduce the construction workload.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of the structure of the expansion sleeve of the anchor rod expanded by the anchor rod head in the utility model;

Each label in the figure: 1-Anchor rod body, 1a-Anchor rod head, 1b-Anchor rod threaded part, 2-Anchor rod expansion sleeve, 2a-Open slot, 3-Anchor rod sleeve, 4-Anchor rod tray, 4a - grouting holes, 5 - nuts.

detailed description

Embodiment 1: As shown in Figure 1-2, a high prestressed anchor with an expansion sleeve, including an anchor body 1, an anchor head 1a, an anchor threaded part 1b, an anchor expansion sleeve 2, and an opening groove 2a , anchor rod casing 3, anchor rod tray 4, grouting hole 4a, nut 5;

One end of the anchor rod body 1 is the anchor rod head 1a, the other end is the anchor rod threaded part 1b, and the anchor rod body 1 is encased by the anchor rod expansion sleeve 2, the anchor rod sleeve 3, and the anchor rod tray 4 in sequence in the middle, and the anchor rod body 1 is encased in sequence. The rod threaded part 1b passes through the anchor rod tray 4 and is threadedly connected with the nut 5, and the anchor rod tray 4 is provided with a grouting hole 4a;

The anchor head 1a is in the shape of an inverted wedge, and the maximum diameter of the head is larger than the diameter of the inner hole of the anchor expansion sleeve 2 .

The anchor rod expansion sleeve 2 is provided with three opening grooves 2a along the anchor rod axial direction at one end close to the anchor rod head 1a.

Embodiment 2: As shown in Figure 1-2, a high prestressed anchor with an expansion sleeve, including an anchor body 1, an anchor head 1a, an anchor threaded part 1b, an anchor expansion sleeve 2, and an opening groove 2a , anchor rod casing 3, anchor rod tray 4, grouting hole 4a, nut 5;

One end of the anchor rod body 1 is the anchor rod head 1a, the other end is the anchor rod threaded part 1b, and the anchor rod body 1 is encased by the anchor rod expansion sleeve 2, the anchor rod sleeve 3, and the anchor rod tray 4 in sequence in the middle, and the anchor rod body 1 is encased in sequence. The rod threaded part 1b passes through the anchor rod tray 4 and is threadedly connected with the nut 5, and the anchor rod tray 4 is provided with a grouting hole 4a;

The anchor head 1a is in the shape of an inverted wedge, and the maximum diameter of the head is larger than the diameter of the inner hole of the anchor expansion sleeve 2 .

The specific implementation of the utility model has been described in detail above in conjunction with the drawings, but the utility model is not limited to the above-mentioned implementation, and within the knowledge of those of ordinary skill in the art, it can also be used without departing from the purpose of the utility model. Make various changes below.

Claims (2)

1. the high pre-stress anchor pole of a band expansion sleeve, it is characterised in that: include anchor rod body (1), anchor pole head (1a), spiral thread on anchor bolt portion (1b), bolt expansion set (2), open slot (2a), anchor pole sleeve pipe (3), anchor rod pallet board (4), injected hole (4a), nut (5)；

Described anchor rod body (1) one end is anchor pole head (1a), the other end is spiral thread on anchor bolt portion (1b), centre passes sequentially through bolt expansion set (2), anchor rod body (1) is entangled by anchor pole sleeve pipe (3), anchor rod pallet board (4), spiral thread on anchor bolt portion (1b) is threaded connection through anchor rod pallet board (4) with nut (5), and anchor rod pallet board (4) is provided with injected hole (4a)；

Described anchor pole head (1a) is reverse wedge shape, and its head maximum gauge is more than the diameter of bore of described bolt expansion set (2).

The high pre-stress anchor pole of band expansion sleeve the most according to claim 1, it is characterised in that: described bolt expansion set (2) has multiple open slot (2a) axial along anchor pole near anchor pole head (1a) one end.