CN217078737U

CN217078737U - Assembled static pressure concrete anchor rod

Info

Publication number: CN217078737U
Application number: CN202122744199.7U
Authority: CN
Inventors: 陶德明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-07-29
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses an assembled static pressure concrete anchor rod, which comprises a female flange, a male flange, a water pipe, a grouting pipe and a steel strand pipe; the male flange and the female flange are arranged at two ends, the middle of the male flange and the female flange is plugged by a water pipe, a grouting pipe and a steel strand pipe, and the water pipe, the grouting pipe and the steel strand pipe are arranged on the outer ring and then are welded together; and manufacturing a steel reinforcement cage on the outer sides of the water pipe and the steel strand pipe by using a steel wire mesh disc, then putting the steel reinforcement cage into a casting mold, and casting concrete to manufacture a concrete anchor rod body, wherein the middle of the concrete anchor rod body is hollow. The utility model discloses be fit for in the sand bed that flows, the confined water stratum has the difficult pore-forming geological conditions construction such as abundant groundwater layer, and this kind of construction stability who impresses the prefabricated concrete stock body is high, and the good reliability has solved the groundwater and the sandy soil loss that appear when this traditional anchor construction under the geological conditions, and peripheral ground of foundation ditch and ground sink, and the foundation ditch displacement volume is big, the big scheduling problem of pulling force loss.

Description

Assembled static pressure concrete anchor rod

Technical Field

The utility model belongs to the technical field of the sand and soil layer that has the confined water and carries out anchor construction technique and specifically relates to under the unable condition of accomplishing of traditional construction mode, can effectively carry out an assembled static pressure concrete stock of anchor construction.

Background

In the geotechnical engineering field, anchor rod construction is an important part of deep foundation pit slope protection projects, the application of the anchor rod technology is widely accepted nationwide in the last two decades, but the construction of the conventional anchor also has some defects, for example, the anchor rod construction in a sandy soil layer with confined water and an undisturbable stratum under a building has huge difficulty and risk, particularly, the anchor rod construction by adopting the conventional method is more difficult under the condition that the country forbids pumping underground water during excavation of a deep foundation pit in recent years, a new soil body around the undisturbed anchor rod needs to be adopted, and the requirement that the anchor rod with the confined water and the stratum condition can be constructed is urgent.

The conventional anchor rod construction is that anchor rod drilling construction is started when a foundation pit is excavated to a certain depth, the drilling hole is generally formed by adopting a drilling method of spiral drilling or casing wall protection high-water flushing deslagging hole forming, a prestressed steel strand is put down after the anchor rod drilling hole is formed in the horizontal direction according to a certain angle, and then cement slurry is poured. If the method is adopted to carry out construction in a soil body without quicksand and without confined water which is not easy to disturb, but when construction conditions are carried out in a quicksand stratum and a stratum with abundant underground water and confined water, the underground water and the quicksand can be gushed out of orifices in a large quantity in the drilling process and after drilling is finished, so that the underground water and sand are lost, the ground and the above-ground buildings sink, the physical properties of the soil body are changed, the foundation pit is displaced and cracked, and finally serious construction accidents occur.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, an assembled static pressure concrete anchor rod (hereinafter referred to as a concrete anchor rod body) is developed, and the concrete anchor rod body perturbs the surrounding soil body in the anchoring construction and adopts a sectional static pressure construction mode. In order to meet the construction requirement that the concrete anchor rod can be smoothly and statically pressed into a soil body, a certain number of holes for placing steel strands, water holes and grouting holes are arranged around the prefabricated anchor body, and a slag discharging hole which is communicated up and down is reserved in the middle of the prefabricated anchor body. Thus, the auxiliary medium water or gas is conveyed to the bottom of the hole through the concrete anchor rod, which is not only beneficial to discharging the dregs, but also can reduce the pressing resistance of the concrete anchor rod body and is convenient for construction. Meanwhile, the concrete anchor rod body is not limited by underground water after being pressed in, and the problems of large tension loss, large foundation pit displacement, creep deformation of the anchor body and the like rarely occur after construction is completed.

The utility model provides an assembled static pressure concrete anchor rod for anchoring construction under the geological condition of confined water, wherein a concrete anchoring body comprises a female flange 1, a male flange 2 and a water pipe 3; the male flange 2 and the female flange 1 are arranged at two ends, and the middle of the male flange and the female flange are inserted and connected by a water pipe 3; between the male flange 2 and the female flange 1, the outer side of the water pipe 3 is surrounded by a steel strand 10 and is put into a mould supported by a steel bar 7, and concrete 4 is poured to manufacture a concrete anchor rod body; the middle of the concrete anchor rod body is provided with a water pipe 3, an inner hole 5 is arranged between the water pipe 3 and the concrete anchor rod body, and a rear grouting hole 6 is reserved on the concrete anchor rod body.

Furthermore, water holes, steel strand holes and bolt fixing holes 11 are reserved on the male flange 2 and the female flange 1, so that water and steel strands 10 can be guaranteed to fall to the bottom of the holes.

Furthermore, the male flange 2 and the female flange 1 are both provided with a clamping groove and a sealing groove, so that the hole position is prevented from being disordered and the sealing tightness of the joint of the concrete anchor rod body is ensured.

Furthermore, the outer wall of the concrete anchor rod body is provided with a plurality of conical platforms (commonly known as barbs) to increase the drawing force. The middle of the end surface of the concrete anchor rod body is provided with a lower hole sealing plate 12.

Furthermore, the connection of the two concrete anchor rod bodies adopts a bolt 10 or a pin connection or other connection forms as long as the stable connection of the two concrete anchor rod bodies is ensured.

Furthermore, a position for mounting the detachable anchor cable 8 is reserved on the outer side of the male flange 2, so that the steel strand 10 of the detachable anchor rod can be conveniently detached; the detachable anchor cable 8 is arranged in the slag discharging chamber 9.

The utility model has the practical effects that the steel strand is locked or injected at the lowest section (one) or two sections of the concrete anchor rod body; when the steel strand is tensioned, the resistance tension is transmitted from the bottom to the top, and the tension of the steel strand is transmitted to the top section by section through the lowest concrete anchor rod body, so that the anchor rod finally formed by the assembled static pressure concrete anchor rod body can be classified into a pressure type anchor rod. The pressure type anchor rod is also most beneficial to solving the problems of endless creep deformation of an anchor rod body, large tension loss, large foundation pit displacement and the like after the steel strand prestress is applied to tensioning and locking during the conventional anchor rod construction at the present stage.

Drawings

FIG. 1 is a cross-sectional view of a concrete anchor shank.

FIG. 2 is a cross-sectional view of a first section of a concrete anchor shank.

Fig. 3 is an end view of a concrete anchor rod body.

FIG. 4 is a finished concrete anchor rod body.

FIG. 5 is a schematic view of the connection of concrete anchor rods.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

An assembled static pressure concrete anchor rod for anchoring construction under the geological condition of confined water, wherein a concrete anchoring body comprises a female flange 1, a male flange 2 and a water pipe 3; the male flange 2 and the female flange 1 are arranged at two ends, and the middle of the male flange and the female flange are inserted and connected by a water pipe 3; between the male flange 2 and the female flange 1, the outer side of the water pipe 3 is surrounded by a steel strand 10 and is put into a mould supported by a steel bar 7, and concrete 4 is poured to manufacture a concrete anchor rod body; the middle of the concrete anchor rod body is provided with a water pipe 3, an inner hole 5 is arranged between the water pipe 3 and the concrete anchor rod body, and a rear grouting hole 6 is reserved on the concrete anchor rod body.

Furthermore, the outer wall of the concrete anchor rod body is provided with a plurality of conical platforms (commonly called barbs) to increase the drawing force. The middle of the end surface of the concrete anchor rod body is provided with a lower hole sealing plate 12.

The use of the concrete anchor rod body:

when the concrete anchor rod body is manufactured, in order to meet the construction requirement that the concrete anchor rod body can be smoothly pressed into a soil body, a certain number of holes for placing steel strands are arranged around the prefabricated anchor body, and a slag discharge hole which is communicated up and down is reserved in the middle of the anchor body. When the concrete anchor rod body is pressed downwards, the resistance soil body at the end part is pressed into the slag discharging chamber, pressure water or pressure air is flushed into the slag discharging chamber through a reserved water channel on the concrete anchor rod body on the drilling machine, and simultaneously, sand is carried out from the concrete anchor rod body from the central hole, so that the peripheral soil body is isolated at the periphery of the slag discharging chamber, the resistance soil at the end is discharged, the original state soil at the periphery of the concrete anchor rod body is basically not disturbed, and meanwhile, when the concrete anchor rod body is pressed into the soil body, the friction force between the wall of the concrete anchor rod body and the soil body is overcome, and the concrete anchor rod body can be smoothly pressed into the designed depth. After reaching the design depth, there are two methods for tensioning.

The concrete anchoring body comprises a female flange, a male flange and a water pipe; the male flange and the female flange are arranged at two ends and the middle is inserted and connected by a water pipe; between the male flange and the female flange, the outer side of the water pipe is protected by a steel wire mesh, then the outer side of the water pipe is put into a casting mold, concrete is poured to manufacture a concrete anchor rod body, the water pipe is arranged in the middle of the concrete anchor rod body, and a slag discharge hole is reserved. After the concrete anchor body is horizontally pressed into the designed depth according to a certain angle, clearing concrete sand in the central slag hole, plugging the bottom hole from the bottom to prevent water and quicksand in the ground from leaking out of the hole, after plugging, inserting a common steel strand bundle or an unbonded steel strand bundle with a detachable lock into the central hole, filling cement slurry into the central hole in the concrete anchor body, then stretching and locking the concrete anchor body after the cement slurry inside and outside the concrete anchor body is hardened and reaches the age to form a prestressed anchor, and when a foundation pit is backfilled to the detachable prestressed anchor steel strand, opening the lock at the lower part of the concrete anchor, drawing the steel strand out, and finishing the whole construction.

In addition, during tensioning, the steel strands are locked or injected because the steel strands are positioned at the lowest section (one) or two sections of the concrete anchor rod body; when the steel strand is tensioned, the resistance tension is transmitted from the bottom to the top, and the tension of the steel strand is transmitted to the top section by section through the lowest concrete anchor rod body, so that the anchor rod finally formed by the static pressure type concrete anchor rod body can be classified into a pressure type anchor rod. The pressure type anchor rod is also most beneficial to solving the problems of endless creep deformation of an anchoring body, large tension loss, large foundation pit displacement and the like after the steel strand prestress is applied to tensioning and locking during the conventional anchor rod construction at the present stage.

Claims

1. The utility model provides an assembled static pressure concrete stock which characterized in that: the concrete anchoring body comprises a female flange (1), a male flange (2) and a water pipe (3); the male flange (2) and the female flange (1) are arranged at two ends, and the middle of the male flange and the female flange is inserted and connected by a water pipe (3); between the male flange (2) and the female flange (1), the outer side of the water pipe (3) is surrounded by a steel strand and is put into a mould supported by a reinforcing steel bar (7), and concrete (4) is poured to manufacture a concrete anchor rod body; the middle of the concrete anchor rod body is provided with a water pipe (3), an inner hole (5) is arranged between the water pipe (3) and the concrete anchor rod body, and a rear grouting hole (6) is reserved on the concrete anchor rod body.

2. An assembled static pressure concrete anchor rod according to claim 1, characterized in that: the male flange (2) and the female flange (1) are reserved with water holes, steel strand holes and bolt fixing holes.

3. The assembled static pressure concrete anchor rod of claim 1, wherein: and the male flange (2) and the female flange (1) are both provided with a clamping groove and a sealing groove.

4. The assembled static pressure concrete anchor rod of claim 1, wherein: a conical table is manufactured on the outer wall of the concrete anchor rod body to increase the drawing force; the middle of the end surface of the concrete anchor rod body is provided with a lower hole sealing plate.

5. The assembled static pressure concrete anchor rod of claim 1, wherein: the two concrete anchor rod bodies are connected by bolts or through pins.

6. The assembled static pressure concrete anchor rod of claim 1, wherein: the position of a detachable anchor rope (8) is reserved on the outer side of the male flange (2), and the detachable anchor rope (8) is installed in the deslagging chamber (9).