CN215977412U

CN215977412U - Distributed anti-floating anchor rod device

Info

Publication number: CN215977412U
Application number: CN202120801687.4U
Authority: CN
Inventors: 姚炳祥; 姚加奕
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2022-03-08
Anticipated expiration: 2031-04-19

Abstract

The utility model relates to the field of buildings, in particular to a distributed anti-floating anchor rod device which comprises a bearing head, an end part locking device, a plurality of steel strands and a drill hole, wherein the bearing head comprises a tail bearing head and at least one middle bearing head which are arranged in the drill hole, and the tail bearing head comprises a first bearing plate, a first fixing bolt, a frame upright rod and a steel strand positioning plate; the first fixing bolt is arranged between the first bearing plate and the first fixing plate, and the connecting end of the steel strand penetrates through the first bearing plate and is fixed by the first fixing bolt; the middle bearing head comprises a second bearing plate, a second fixing bolt and a fixing rod; the connecting ends of the group of steel strands corresponding to the middle bearing head penetrate through the second bearing plate and are fixed by the second fixing bolt. This patent is through setting up a plurality of carrier heads, and is follow-up when upwards pulling steel strand wires, with the work load through each carrier head dispersion effect on the anchor body, can effectively improve withdrawal resistance.

Description

Distributed anti-floating anchor rod device

Technical Field

The utility model relates to the field of buildings, in particular to a distributed anti-floating anchor rod device.

Background

With the continuous promotion of the urbanization process in China, underground spaces are more and more utilized, basement structures are developed in the large and deep direction, and the underground structures are often buried below the underground water level, so that the closed underground structures generate larger buoyancy, and more anti-floating measures are often required to be arranged below foundation slabs of the underground structures. The anti-floating anchor rod is low in manufacturing cost and simple in construction, is more applied to anti-floating engineering, and is particularly widely applied to mountain foundations with good foundation soil. The foundation in the mountain area is mainly hard rock, the structure can directly utilize the substrate as a natural foundation without arranging a compression-resistant engineering pile, but the anti-floating can not be met, more anti-floating piles need to be arranged, the friction resistance between the anchoring body and the substrate rock of the conventional anti-floating anchor rod is larger, the bonding force between the reinforcing steel bar arranged in the anchoring body and the anchoring body is also larger, when the reinforcing steel bar is subjected to larger uplifting force, the load is transmitted to the deep part of the anchoring body along the reinforcing steel bar, but the engineering experience shows that the upper uplifting load can not be transmitted all the time because the rigidity of the two is larger, the stress concentration between the near-end reinforcing steel bar and anchoring slurry can often occur to generate adhesion and detachment after certain uplifting force is reached, then the load can be further transmitted downwards, namely, the anchoring section length for effectively adhering the reinforcing steel bar and the anchoring body to play a role is relatively fixed, and the anchoring effect section can not be further lengthened because the length is generally 6-9m, therefore, the traditional anti-floating anchor rod has the limit value of the anti-pulling force, and the actually provided anti-pulling force and the design calculation have larger access; on the other hand, because the load is transmitted through the adhesive force of the reinforcing steel bars and the anchoring bodies, the cement anchoring slurry is in a tension state, and the material characteristics of the cement anchoring slurry, such as large pressure resistance and small tensile resistance, are not suitable. On the other hand, the upper end steel bar body and the anchoring body are easy to be stuck and detached and crack, and the problem that the steel bar is corroded when contacting with underground water also exists.

The Chinese utility model patent (publication number: CN208733626U, published as: 20190412) discloses pressure dispersion type anchor rod structure, including anchor section and free section, anchor section and free section fixed connection, the free section includes a plurality of unit end to end's ground tackle, and the one end of ground tackle on upper portion is equipped with the safety cover, the bottom border of safety cover is equipped with the bolster that is hollow structure, the lower part be equipped with drilling on the ground tackle outer wall, the anchor section includes the slip casting pipe, one side align to grid of slip casting pipe has a plurality of supporting bodies, and the lower part be fixed with many pairs of unbonded steel strand wires in the supporting body. According to the anchor rod, the anchoring sections and the free sections are arranged, so that the bonding force applied to the anchor rod is uniformly distributed, the steel strands on each bearing body are distributed in pairs, and the steel strands pass through the holes after bypassing the bearing bodies.

However, the above structure has the following problems: the steel strands are distributed in pairs, the steel strands need to be wound around the supporting bodies and penetrate out of the holes, the rigidity of the steel strands is high, the size of the supporting bodies is small, and the winding positions are prone to causing large extrusion deformation of the steel strands.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a distributed anti-floating anchor rod device, which comprises a plurality of bearing heads, wherein when the steel strand is pulled upwards, the working load is dispersed and acted on the anchoring body through the bearing heads, so that the anti-pulling force can be effectively improved; on the other hand, the waterproof and anti-trapping performance of the rod body is enhanced.

In order to realize the technical purpose, the following technical scheme is adopted for implementation:

a distributed anti-floating anchor rod device comprises a drill hole, bearing heads, an end locking device and a plurality of steel strands, wherein the end locking device is arranged at the outer side end of the drill hole, the outer side ends of the steel strands are anchored by the end locking device, the steel strands are divided into a plurality of groups, the number of the groups is the same as that of the bearing heads, each group of steel strands corresponds to one bearing head respectively, sleeves penetrate through the peripheries of the steel strands and extend into the drill hole, connecting ends which do not penetrate through the sleeves are arranged at the lower side end parts of the steel strands, the connecting ends of the steel strands are fixedly connected with the corresponding bearing heads respectively, and the steel strands on the bearing head at the rear side penetrate through the bearing head at the front side through the sleeves and are connected to the end locking device;

preferably, the bearing head comprises a tail bearing head and at least one middle bearing head, the tail bearing head is arranged in the drill hole and comprises a first bearing plate, a first fixing bolt, a frame upright rod and a steel strand positioning plate; the first fixing bolt is arranged between the first bearing plate and the first fixing plate, the connecting end of the steel strand penetrates through the first bearing plate and is fixed by the first fixing bolt, the tail end of the connecting end is positioned by the steel strand positioning plate arranged at the tail end, and the first bearing plate, the first fixing plate and the steel strand positioning plate are fixedly connected through the erection rod.

Preferably, the middle bearing head comprises a second bearing plate, a second fixing bolt and a fixing rod; the second fixing bolt is arranged between the second bearing plate and the second fixing plate, and the second bearing plate and the second fixing plate are fixedly connected through the fixing rod; the connecting end of a group of steel strands corresponding to the middle bearing head passes through the second bearing plate and is fixed by the second fixing bolt, and the second bearing plate and the second fixing plate are provided with through openings for the sleeves of the groups of steel strands corresponding to the rear bearing head to pass through.

Preferably, the end locking device comprises an anchor ring clamp and a steel backing plate, the outer ends of the plurality of steel strands are fixed to the outer side of the bottom plate through the anchor ring clamp, and the steel backing plate is arranged between the anchor ring clamp and the bottom plate.

Preferably, the lower part of the bottom plate is provided with a steel sleeve, and the upper parts of the steel strands are positioned in the steel sleeve; the interior of the steel sleeve is provided with micro expansion concrete and waterproof factice from top to bottom; the top end of the sleeve is positioned in the waterproof ointment; the top ends of the steel strands penetrate through the waterproof factice, the micro expansion concrete and the bottom plate in sequence and are anchored by the end locking device.

Preferably, the water stop steel plate, the bottom plate waterproof felt and the plain concrete filling layer are sequentially arranged outside the steel sleeve from top to bottom; the water stop steel plate is positioned in the bottom plate, and the bottom plate waterproof felt and the plain concrete filling layer are positioned below the bottom plate.

In conclusion, the technical effects of the utility model are as follows: through setting up a plurality of bearing heads, follow-up when upwards pulling the steel strand wires, with the work load through each bearing head dispersion effect on the anchor body, can effectively improve the withdrawal resistance, on the other hand can effectively improve the waterproof performance of steel strand wires.

Drawings

Fig. 1 is a longitudinal sectional view of the present invention.

FIG. 2 is a longitudinal cross-sectional view of the first carrier head.

FIG. 3 is a longitudinal cross-sectional view of a second carrier head.

Fig. 4 is a longitudinal sectional view of the locking device.

FIG. 5 is a schematic cross-sectional view of the first carrier plate.

FIG. 6 is a schematic cross-sectional view of the second carrier plate.

Detailed Description

As shown in fig. 1, a distributed anti-floating anchor rod device, the device includes a drilling hole, a bearing head, an end locking device 3 and a plurality of steel strands 4, cement anchoring slurry is filled in the drilling hole, the end locking device 3 is arranged at the outer side end of the drilling hole, the outer side ends of the plurality of steel strands 4 are anchored by the end locking device 3, the plurality of steel strands 4 are divided into a plurality of groups, the number of the groups is the same as the number of the bearing head, each group of steel strands 4 corresponds to one bearing head, sleeves 5 are arranged on the inner sides of the steel strands 4 in a penetrating manner and extend into the drilling hole, connecting ends which do not penetrate the sleeves 5 are arranged at the inner side ends of the steel strands 4, the connecting ends of the groups of steel strands 4 are fixedly connected with the corresponding bearing heads, and the steel strands 4 on the bearing head on the rear side penetrate the bearing head through the bearing head in front to be connected to the end locking device 3 through the sleeves 5. The carrier head comprises a tail carrier head 1 and at least one middle carrier head 2 arranged in the borehole.

As shown in fig. 2 and 5, the tail carrier head 1 includes a first carrier plate 11, a first fixing plate 12, a first fixing bolt 13, a frame upright 14, and a steel strand positioning plate 15. First gim peg 13 sets up between first loading board 11, first fixed plate 12, and the connection end of steel strand wires 4 passes first loading board 11 and is fixed by first gim peg 13, and the tail end of connecting the end is fixed a position by setting up at terminal steel strand wires locating plate 15, through a frame pole setting 14 fixed connection between first loading board 11, first fixed plate 12 and the steel strand wires locating plate 15. The connecting end of the steel strand 4 is fixed between the first bearing plate 11 and the first fixing plate 12 through the first fixing bolt 13, so that the connecting end of the steel strand 4 cannot be separated from the first bearing plate 11 when the steel strand 4 is pulled upwards subsequently.

As shown in fig. 3 and 6, the middle carrier head 2 includes a second carrier plate 21, a second fixing plate 22, a second fixing bolt 23, and a fixing rod 24. The second fixing bolt 23 is disposed between the second loading plate 21 and the second fixing plate 22, and the second loading plate 21 and the second fixing plate 22 are fixedly connected by a fixing rod 24. The connection end of the group of steel strands 4 corresponding to the middle bearing head 2 passes through the second bearing plate 21 and is fixed by the second fixing bolt 23, and through holes for the sleeves 5 of the groups of steel strands 4 corresponding to the rear bearing head to pass through are formed in the second bearing plate 21 and the second fixing plate 22. The connecting end of the steel strand 4 is fixed between the second bearing plate 21 and the second fixing plate 22 through the second fixing bolt 23, so that the connecting end of the steel strand 4 cannot be separated from the second bearing plate 21 when the steel strand 4 is pulled upwards subsequently.

As shown in fig. 4, the end locking device 3 includes an anchor ring clamp 31 and a steel shim plate 32, the outer ends of the plurality of steel strands 4 are fixed on the top of the bottom plate 6 through the anchor ring clamp 31, and the steel shim plate 32 is disposed between the anchor ring clamp 31 and the bottom plate 6. The lower part of the bottom plate 6 is provided with a steel sleeve 33, and the upper parts of the steel strands 4 are positioned in the steel sleeve 33. The interior of the steel sleeve 33 is provided with micro-expansive concrete 34 and waterproof paste 35 from top to bottom. The top end of the cannula 5 is located in a waterproof gel 35. The top ends of the steel strands 4 are anchored by the end locking device 3 by sequentially passing through the waterproof paste 35, the micro-expansive concrete 34 and the bottom plate 6. The exterior of the steel sleeve 33 is provided with a water stop steel plate 36, a bottom plate waterproof felt 37 and a plain concrete filling layer 38 from top to bottom in sequence. The water stop steel plate 36 is positioned in the bottom plate 6, and the bottom plate waterproof felt 37 and the plain concrete filling layer 38 are positioned below the bottom plate 6. The structure can obviously improve the waterproof performance.

When the anchor is used, the steel strands 4 are pulled upwards, and each bearing head can obtain an upward pulling force due to the fact that the bearing heads are arranged in sections, so that the first bearing plate 11 and each second bearing plate 21 can push the anchor slurry from the lower portion to obtain a pulling resistance, the anchor body is in a pressed state, and the characteristics of materials are fully exerted. Meanwhile, due to the fact that the anchor body is stressed in a segmented mode and is always in a pressed state, the rod body and the anchor body are not prone to cracking, and underground water is prevented from permeating and rusting.

According to the utility model, the plurality of bearing heads are arranged, so that the working load is dispersed and acted on the anchoring body through the bearing heads when the steel strand is pulled upwards subsequently, the pulling resistance can be effectively improved, and the waterproof performance and the durability of the rod body are further improved.

Claims

1. A distributed anti-floating anchor rod device is characterized by comprising a drill hole, a bearing head, an end locking device (3) and a plurality of steel strands (4), wherein the end locking device (3) is arranged at the outer side end of the drill hole, the outer side ends of the steel strands (4) are anchored by the end locking device (3), the steel strands (4) are divided into a plurality of groups, the number of the groups is the same as that of the bearing head, each group of the steel strands (4) corresponds to one bearing head respectively, sleeves (5) penetrate through the periphery of the steel strands (4) and extend into the drill hole, the end parts of the inner sides of the steel strands (4) are respectively provided with a connecting end which does not penetrate through the sleeve (5), the connecting ends of the steel strands (4) are respectively and fixedly connected with the corresponding bearing heads, and the steel strands (4) on the bearing head on the rear side penetrate through the bearing head on the front side through the sleeve (5) and are connected to the end locking device (3).

2. A distributed anti-floating anchor device according to claim 1, wherein the carrier head comprises a tail carrier head (1) and at least one middle carrier head (2) arranged in the borehole, the tail carrier head (1) comprising a first carrier plate (11), a first fixing plate (12), a first fixing bolt (13), an erection rod (14) and a steel strand positioning plate (15); first gim peg (13) set up between first loading board (11), first fixed plate (12), and the connection end of steel strand wires (4) passes first loading board (11) and is fixed by first gim peg (13), and the tail end of connecting the end is fixed a position by setting up at terminal steel strand wires locating plate (15), through a frame pole setting (14) fixed connection between first loading board (11), first fixed plate (12) and steel strand wires locating plate (15).

3. A distributed anti-floating anchor device according to claim 2, wherein the middle carrier head (2) comprises a second carrier plate (21), a second fixing plate (22), a second fixing bolt (23) and a fixing rod (24); the second fixing bolt (23) is arranged between the second bearing plate (21) and the second fixing plate (22), and the second bearing plate (21) and the second fixing plate (22) are fixedly connected through a fixing rod (24); the connecting end of a group of steel strands (4) corresponding to the middle bearing head (2) passes through the second bearing plate (21) and is fixed by the second fixing bolt (23), and through holes for the sleeves (5) of each group of steel strands (4) corresponding to the rear bearing head to pass through are formed in the second bearing plate (21) and the second fixing plate (22).

4. A distributed anti-floating anchor device according to claim 1, wherein the end locking device (3) comprises an anchor ring clamp (31) and a steel shim plate (32), the outer ends of the plurality of steel strands (4) are fixed on the top surface of the bottom plate (6) through the anchor ring clamp (31), and the steel shim plate (32) is arranged between the anchor ring clamp (31) and the bottom plate (6).

5. A distributed anti-floating anchor device according to claim 4, wherein the lower part of the bottom plate (6) is provided with a steel sleeve (33), and the upper parts of the steel strands (4) are positioned in the steel sleeve (33); the interior of the steel sleeve (33) is provided with micro expansion concrete (34) and waterproof factice (35) from top to bottom; the top end of the sleeve (5) is positioned in the waterproof ointment (35); the top ends of the steel strands (4) sequentially penetrate through the waterproof factice (35), the micro expansion concrete (34) and the bottom plate (6) and are anchored by the end locking device (3).

6. A distributed anti-floating anchor rod device according to claim 5, characterized in that a water stop steel plate (36), a bottom plate waterproof felt (37) and a plain concrete filling layer (38) are arranged outside the steel sleeve (33) from top to bottom in sequence; the water stop steel plate (36) is positioned in the bottom plate (6), and the bottom plate waterproof felt (37) and the plain concrete filling layer (38) are positioned below the bottom plate (6).

7. A distributed anti-floating anchor device as claimed in claim 1, wherein the bore hole is filled with a cement anchoring slurry.

8. A distributed anti-floating anchor device according to claim 1, in which the number of the central carrier heads (2) is 1 or more.