CN215630199U

CN215630199U - Water-drop-shaped enlarged footing anti-floating anchor rod based on PSB finish rolling deformed steel bar

Info

Publication number: CN215630199U
Application number: CN202122120212.1U
Authority: CN
Inventors: 高晓峰; 侯会军; 罗东林; 张文鹏; 李娜; 秦东林
Original assignee: CREEC Chengdu Survey Design and Research Co Ltd
Current assignee: CREEC Chengdu Survey Design and Research Co Ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-01-25
Anticipated expiration: 2031-09-03

Abstract

The utility model belongs to the technical field of anti-floating anchor rods, and discloses a drop-shaped enlarged footing anti-floating anchor rod based on PSB finish-rolled deformed steel bars, which aims to solve the problem that an anchoring body at a large-section step of an enlarged footing of the conventional anti-floating anchor rod is easy to shear and crack. The anchor hole comprises an anchor hole arranged in a soil body or a rock body, wherein an anchor rod body is sleeved in the anchor hole, an anchor body is formed between the anchor hole and the anchor rod body in a pouring mode, the anchor hole comprises a non-expanding head section, a water-drop-shaped expanding head section and an equal-diameter expanding head section which are sequentially communicated from top to bottom, and the diameter of the non-expanding head section of the anchor hole is gradually and smoothly expanded to the diameter of the equal-diameter expanding head section by the water-drop-shaped expanding head section. According to the utility model, the design of the water drop type head expanding section enables the anchoring body not to form a step surface, so that the shearing stress applied to the anchoring body is reduced, the generation of cracks of the anchoring body is controlled, the corrosion of the anchor rod body is avoided, and the purpose of prolonging the service life of the anti-floating anchor rod is achieved.

Description

Water-drop-shaped enlarged footing anti-floating anchor rod based on PSB finish rolling deformed steel bar

Technical Field

The utility model belongs to the technical field of anti-floating anchor rods, and particularly relates to a drop-shaped enlarged footing anti-floating anchor rod based on PSB finish-rolled deformed steel bar.

Background

The anti-floating anchor rod is a structural member arranged for resisting upward displacement of a building on the anti-floating anchor rod, is related to the height and change of an underground water level, and is opposite to the stress direction of a compression-resistant pile.

Anti-floating anchor includes ordinary anti-floating anchor and enlarged footing anti-floating anchor, and in order to improve the anti-floating ability of anti-floating anchor, enlarged footing anti-floating anchor has appeared, and enlarged footing anti-floating anchor is with the biggest difference of ordinary anti-floating anchor: the bottom of the anchor hole is provided with the enlarged head, and an enlarged head section is formed at the bottom of the anchor hole after pouring is finished, so that the anti-pulling capacity of the anti-floating anchor rod is improved. For example, the patent with application number 201220060959.0 discloses a bottom-expanded prestressed expanded head anti-floating anchor rod, which comprises a metal corrugated pipe penetrating through a waterproof bottom plate, wherein the metal corrugated pipe extends into the lower end part of an anchor rod hole at the lower part of the waterproof bottom plate, and the lower end part of the anchor rod hole is a rod end expanded head; a steel sleeve is embedded outside the metal corrugated pipe in the waterproof bottom plate; the metal corrugated pipe is penetrated with a steel strand, the upper end of the steel strand is fixed on the anchorage device, the lower end of the steel strand is anchored on the anchoring plate in the rod end expansion head, and the anchoring plate is arranged on the anchoring head; and a secondary grouting guide pipe is arranged between the metal corrugated pipe and the steel sleeve.

For example, the utility model with application number 201922255034.6 discloses a PSB finish rolling deformed steel bar enlarged head anti-floating anchor rod structure, which comprises an enlarged head hole, a non-enlarged head hole, a PSB finish rolling deformed steel bar anchor rod body, a supporting body, a matched anchor plate and an anchor head; the PSB finish-rolled deformed steel anchor rod body is a round rod, a first through hole and a second through hole are formed in the matched anchor plate and the anchor head, the matched anchor plate and the anchor head are arranged at the upper end part of the PSB finish-rolled deformed steel anchor rod body and are matched with the outer circumferential surface of the PSB finish-rolled deformed steel anchor rod body through the first through hole and the second through hole respectively, the matched anchor plate is arranged at the lower end of the anchor head, and the upper surface of the matched anchor plate is attached to the lower surface of the anchor head; the expanded head hole and the non-expanded head hole are formed in a soil body or a rock body at the lower part of a building foundation or a water-resistant plate, the expanded head hole is communicated with the non-expanded head hole, the expanded head hole is arranged at the lower end of the non-expanded head hole, and the PSB finish-rolled deformed steel bar anchor rod body is arranged inside the expanded head hole and the non-expanded head hole and is communicated with the expanded head hole and the non-expanded head hole; and cement grout or filling concrete is injected into the enlarged head hole and the non-enlarged head hole.

For example utility model patent application No. 202021002179.1 discloses an anti-crack prestressing force enlarged footing anti-floating anchor rod and anti-crack water droplet shape enlarged footing anti-floating anchor rod, including seting up the anchor eye in the soil body, the anchor eye is including enlarging first section and non-enlargement first section, the diameter that enlarges the first section is greater than the diameter of non-enlargement first section, be provided with finish rolling deformed steel bar in the anchor eye, concrete has been pour between anchor eye and the finish rolling deformed steel bar, the top segment cover of anchor eye is equipped with the steel sleeve, the top fixedly connected with anchor slab of steel sleeve, steel sleeve and anchor slab and threaded connection have the nut that is used for applying prestressing force are passed in proper order to the top of finish rolling deformed steel bar.

As above-mentioned big anti-floating anchor rod of enlarged head that gives way to an example, the anchor eye includes free section and anchor section, thereby the diameter of anchor section is greater than the diameter of free section and forms the enlarged head, however, enlarge being formed with the step between head (anchor section) and the non-enlarged head (free section) among the prior art, enlarge and do not have smooth transition between the head and the non-enlarged head, thereby lead to anchor body (grouting body) to receive the problem of shearing easily owing to stress concentration in the step department, there is the problem of the body of anchor corrosion after the anchor body splits at the step department, thereby the life of anti-floating anchor rod has been reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drop-shaped enlarged head anti-floating anchor rod, aiming at solving the problem that an anchoring body at a large-section step of an enlarged head of the existing anti-floating anchor rod is easy to shear and crack, and the enlarged head section and a non-enlarged head section are in smooth transition, so that the shear stress borne by the anchoring body is reduced, the generation of cracks of the anchoring body is controlled, the corrosion of an anchor rod body is avoided, and the purpose of prolonging the service life of the anti-floating anchor rod is achieved.

In order to solve the technical problem, the technical scheme adopted by the utility model is as follows:

the utility model provides a water droplet shape enlarged footing anti-floating anchor based on PSB finish rolling deformed steel bar, is including seting up the anchor eye in the soil body or rock mass, the cover is equipped with the stock body in the anchor eye, pours between anchor eye and the stock body and is formed with the anchor body, a serial communication port, the anchor eye is from last to down including the non-enlarged head section that communicates in proper order, water droplet shape enlarged head section and the equal diameter enlarged head section, water droplet shape enlarged head section makes the diameter of the non-enlarged head section of anchor eye smooth the diameter that enlarges the head section to the equal diameter gradually.

In some embodiments, the periphery of the anchor rod body is sleeved with an anti-corrosion sleeve, the anti-corrosion sleeve is filled with anti-corrosion grease, and the lower end of the anti-corrosion sleeve is provided with a flexible sealing ring for preventing the anti-corrosion grease from flowing out.

In some embodiments, the lower end of the corrosion protection sleeve extends to a drop-shaped enlarged head section of the anchor eye.

In some embodiments, a plurality of supporting bodies are arranged on the anchor rod body positioned in the equal-diameter expanding head section, or a bearing plate and an anchor head are sleeved at the lower end of the anchor rod body positioned in the equal-diameter expanding head section.

In some embodiments, a cushion layer is poured at the upper end of the anchor hole, an anchor pier with the upper end size larger than the lower end size is poured at the position of the cushion layer corresponding to the center of the anchor hole, the lower end of the anchor pier is larger than or equal to the diameter of the anchor hole, the center of the anchor pier corresponds to the center of the anchor hole, the lower end of the anchor rod body penetrates through the anchor pier and extends into the anchor hole, a spiral rib in a spiral shape is further arranged in the anchor pier, and the middle of the spiral rib is provided with a central hole for the anchor rod body to penetrate through.

In some embodiments, at least two diagonal reinforcements are connected to the periphery of the spiral reinforcement, one end of each diagonal reinforcement is connected to the lower end of the spiral reinforcement, and the other end of each diagonal reinforcement is connected to a horizontal reinforcement implanted in the horizontal section of the cushion layer.

In some embodiments, the diagonal draw bars are symmetrically connected to the periphery of the spiral bars.

In some embodiments, the upper end of the anchor rod body passes through the central hole of the spiral rib and out of the cushion layer and is sleeved with a prestress matching anchor plate, the prestress matching anchor rod is provided with a prestress matching anchor head, and the lower end surface of the prestress matching anchor plate is in contact with the upper end surface of the cushion layer.

In some embodiments, a mating anchor plate and a mating anchor head are also sleeved on the anchor rod body at the upper end of the prestressed mating anchor head.

In some embodiments, a foundation or water-resistant plate is further poured above the cushion layer, and the prestress mating anchor plate and the mating anchor plate are positioned in the foundation or water-resistant plate.

Compared with the prior art, the utility model has the following beneficial effects:

according to the anti-floating anchor rod with the water-drop-shaped enlarged head based on PSB finish-rolled deformed steel bar, the water-drop-shaped enlarged head section is arranged between the non-enlarged head section and the equal-diameter enlarged section, so that the diameter of the anchor hole is gradually and smoothly transited from the bottom of the non-enlarged head section to the top of the equal-diameter enlarged head section, the anchoring body cannot form a step surface, the shearing stress applied to the anchoring body is reduced, the generation of cracks of the anchoring body is controlled, the corrosion of the anchor rod body is avoided, and the purpose of prolonging the service life of the anti-floating anchor rod is achieved.

Meanwhile, the anchor pier corresponding to the anchor hole is arranged in the middle of the cushion layer, the spiral ribs are arranged in the anchor pier, the anchor pier can provide good support when prestress is applied to the prestressed anchor rod (anchor rod body), and the spiral ribs and the diagonal draw steel bars can restrict horizontal deformation of anchor pier concrete, so that the overall strength of the anchor pier is greatly improved, and shear damage caused by insufficient shear strength of concrete (cushion layer) is avoided.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of another embodiment of the anti-floating anchor according to the present invention at a cushion layer;

the labels in the figure are: 1. anchor eye, 101, non-enlarged head section, 102, water drop shape enlarged head section, 103, equal diameter enlarged head section, 2, anchor rod body, 3, anticorrosive casing pipe, 4, flexible sealing gasket, 5, supporting body, 6, cushion layer, 7, prestress matching anchor plate, 8, prestress matching anchor head, 9, matching anchor plate, 10, matching anchor head, 11, foundation or water-resistant plate, 12, anchor pier, 13, spiral rib, 14, diagonal reinforcement, 15 and horizontal rib.

Detailed Description

The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments used by those skilled in the art without any creative effort belong to the protection scope of the present invention.

With reference to the attached drawing 1, the drop-shaped enlarged head anti-floating anchor rod based on PSB finish-rolled deformed steel bar comprises an anchor hole 1 formed in a soil body or a rock body, an anchor rod body 2 is sleeved in the anchor hole 1, an anchor body is formed between the anchor hole 1 and the anchor rod body 2 in a pouring mode, the anchor hole 1 comprises a non-enlarged head section 101, a drop-shaped enlarged head section 102 and an equal-diameter enlarged head section 103 which are sequentially communicated from top to bottom, and the drop-shaped enlarged head section 102 enables the diameter of the non-enlarged head section 101 of the anchor hole to be gradually and smoothly enlarged to the diameter of the equal-diameter enlarged head section. The anchor rod body 2 can be made of common steel bars or PSB finish rolled deformed steel bars. According to the anti-floating anchor rod with the water-drop-shaped enlarged head, the water-drop-shaped enlarged head section is arranged between the non-enlarged head section and the equal-diameter enlarged section, so that the diameter of the anchor hole is gradually and smoothly transited from the bottom of the non-enlarged head section to the top of the equal-diameter enlarged head section, the anchoring body cannot form a step, the shear stress on the anchoring body is reduced, the generation of cracks of the anchoring body is controlled, the corrosion of the anchor rod body is avoided, and the purpose of prolonging the service life of the anti-floating anchor rod is achieved.

The drop-shaped enlarged head section disclosed by the utility model means that the diameter of the anchor hole is gradually changed, so that the sudden change of the diameter is avoided, and a step surface cannot be formed on the poured anchor body.

In some embodiments, the periphery of the anchor rod body 2 is sleeved with an anti-corrosion sleeve 3, the anti-corrosion sleeve 3 is filled with anti-corrosion grease, and the lower end of the anti-corrosion sleeve 3 is provided with a flexible sealing ring 4 for preventing the anti-corrosion grease from flowing out. Wherein, the corrosion-proof sleeve 3 and the flexible sealing ring 4 are both products in the prior art, and can be understood and understood by those skilled in the art, and are not described in detail herein. The anchor rod body is protected from corrosion by arranging the corrosion-resistant sleeve 3, the corrosion-resistant grease and the flexible sealing ring 4.

In some embodiments, the corrosion protection sleeve 3 extends to the drop-shaped enlarged head section 102 of the anchor eye 1. Compared with the prior art, the length (depth) of the equal-diameter expanding head section 103 can be reduced under the action of the holding force of the drop-shaped expanding head section 102, and therefore the construction efficiency of the anti-floating anchor rod is improved conveniently.

In the prior art, the non-expansion head section is not considered when calculating the holding power due to the decision of geological conditions (soft soil layers), so that the anchoring sections (holding power sections) are all in the expansion head section, the design length (depth) of the expansion head section is longer, and the construction speed of an anchor hole is lower. Due to the design of the water-drop-shaped enlarged head section 102, part of the soft soil layer can be used as a supporting section or supplement of the supporting section, so that the length (depth) of the equal-diameter enlarged head section is reduced, and the forming speed of the anchor hole is increased.

In some embodiments, when the anti-floating anchor is a tension-compression type prestressed anti-floating anchor, a plurality of carriers 5 are disposed on the anchor rod body 2 within the equal diameter enlarged head section 103. When the anti-floating anchor rod is a pressure type anti-floating anchor rod, the lower end of the anchor rod body 2 positioned at the equal-diameter enlarged head section 103 is sleeved with a bearing plate and an anchor head.

In some embodiments, a cushion layer 6 is poured on the upper end of the anchor hole 1, an anchor pier 12 with the upper end size larger than the lower end size is poured on the cushion layer 6 corresponding to the center of the anchor hole 1, the lower end size of the anchor pier 12 is larger than or equal to the diameter of the anchor hole 1, the center of the anchor pier 12 corresponds to the center of the anchor hole 1, wherein the anchor pier 12 can be in a circular truncated cone shape, a prismatic shape and the like, for convenience of construction, as a preferred mode of the utility model, the anchor pier 12 is in a circular truncated cone shape with a large upper end and a small lower end, the lower end of the anchor rod body 2 penetrates through the anchor pier 12 and extends into the anchor hole 1, a spiral rib 13 in a spiral shape is further arranged in the anchor pier 12, and the middle of the spiral rib 13 is provided with a central hole for the anchor rod body 2 to penetrate through.

In some embodiments, at least two diagonal reinforcements 14 are connected to the periphery of the spiral reinforcement 13, one end of each diagonal reinforcement 14 is connected to the lower end of the spiral reinforcement 13, and the other end of each diagonal reinforcement 14 is connected to a horizontal reinforcement 15 embedded in the horizontal section of the cushion layer 6.

In a preferred embodiment of the present invention, the diagonal reinforcement 14 is disposed along a direction parallel to the outer surface of the anchor pier 12, that is, the diagonal reinforcement 14 is disposed along the slope of the outer surface of the anchor pier 12. The stress of the diagonal reinforcing steel bars 14 and the anchor pier 12 is more uniform, and the bearing capacity is further improved.

In some embodiments, to improve the uniformity of the force, the diagonal draw bars 14 are symmetrically connected to the periphery of the spiral bars 13.

In some embodiments, the upper end of the anchor rod body 2 of the anti-floating anchor rod passes through the central hole of the spiral rib 13 and penetrates out of the cushion layer 6 and is sleeved with the prestress matching anchor plate 7, the prestress matching anchor rod 7 is provided with a prestress matching anchor head 8, and the lower end surface of the prestress matching anchor plate 7 is in contact with the upper end surface of the cushion layer 6.

In some embodiments, a mating anchor plate 9 and a mating anchor head 10 are also sleeved on the anchor rod body 2 at the upper end of the prestressed mating anchor head 8.

In some embodiments, a foundation or water-resistant plate 11 is further poured above the cushion layer 6, and the prestressed complementary anchor plate 9 and the complementary anchor plate 10 are positioned in the foundation or water-resistant plate 11.

The anchor pier corresponding to the anchor hole is arranged in the middle of the cushion layer, the spiral ribs are arranged in the anchor pier, the anchor pier can provide good support when prestress is applied to the prestressed anchor rod (anchor rod body), and the spiral ribs and the diagonal draw steel bars can restrict horizontal deformation of anchor pier concrete, so that the overall strength of the anchor pier is greatly improved, and shear damage caused by insufficient shear strength of the concrete (cushion layer) is avoided.

Claims

1. The utility model provides a water droplet shape enlarged footing anti-floating anchor based on PSB finish rolling deformed steel bar, is including seting up the anchor eye in the soil body or rock mass, the cover is equipped with the stock body in the anchor eye, pours between anchor eye and the stock body and is formed with the anchor body, a serial communication port, the anchor eye is from last to down including the non-enlarged head section that communicates in proper order, water droplet shape enlarged head section and the equal diameter enlarged head section, water droplet shape enlarged head section makes the diameter of the non-enlarged head section of anchor eye smooth the diameter that enlarges the head section to the equal diameter gradually.

2. The PSB finish rolled deformed steel bar-based water droplet-shaped enlarged footing anti-floating anchor rod as claimed in claim 1, wherein an anti-corrosion sleeve is sleeved on the periphery of the anchor rod body, anti-corrosion grease is filled in the anti-corrosion sleeve, and a flexible sealing ring for preventing the anti-corrosion grease from flowing out is installed at the lower end of the anti-corrosion sleeve.

3. The PSB finish-rolled deformed steel bar-based drop-shaped enlarged head anti-floating anchor rod according to claim 2, wherein the lower end of the corrosion-resistant sleeve extends to a drop-shaped enlarged head section of the anchor hole.

4. The PSB finish-rolled deformed bar-based water droplet-shaped enlarged head anti-floating anchor rod as claimed in any one of claims 1 to 3, wherein a plurality of supporting bodies are provided on the anchor rod body located in the equal-diameter enlarged head section, or a supporting plate and an anchor head are provided on the lower end of the anchor rod body located in the equal-diameter enlarged head section.

5. The PSB finish-rolled deformed steel bar-based water droplet-shaped enlarged footing anti-floating anchor rod as claimed in any one of claims 1-3, wherein a cushion layer is poured on the upper end of the anchor hole, an anchor block with the upper end larger than the lower end is poured on the cushion layer corresponding to the center of the anchor hole, the lower end of the anchor block is larger than or equal to the diameter of the anchor hole, the center of the anchor block and the center of the anchor hole correspond to each other, the lower end of the anchor rod body passes through the anchor block and extends into the anchor hole, a spiral rib is further arranged in the anchor block, and the middle of the spiral rib is provided with a central hole for the anchor rod body to pass through.

6. The PSB finish-rolled deformed steel bar-based water drop-shaped enlarged footing anti-floating anchor rod as claimed in claim 5, wherein the periphery of the spiral rib is connected with at least two diagonal reinforcing bars, one end of each diagonal reinforcing bar is connected with the lower end of the spiral rib, and the other end of each diagonal reinforcing bar is connected with a horizontal rib implanted into the horizontal section of the cushion layer.

7. The PSB finish-rolled deformed steel bar-based water drop-shaped enlarged footing anti-floating anchor rod as claimed in claim 6, wherein the diagonal reinforcing steel bars are symmetrically connected to the periphery of the spiral reinforcing steel bars.

8. The PSB finish-rolled deformed steel bar-based water droplet-shaped enlarged footing anti-floating anchor rod as claimed in claim 6, wherein the upper end of the anchor rod body passes through the center hole of the spiral rib and out of the cushion layer and is sleeved with a pre-stress matched anchor plate, the pre-stress matched anchor rod is provided with a pre-stress matched anchor head, and the lower end surface of the pre-stress matched anchor plate is in contact with the upper end surface of the cushion layer.

9. The PSB finish-rolled deformed steel bar-based water droplet-shaped enlarged footing anti-floating anchor rod as claimed in claim 8, wherein a mating anchor plate and a mating anchor head are further sleeved on the anchor rod body at the upper end of the pre-stressed mating anchor head.

10. The PSB finish-rolled deformed steel bar-based water drop-shaped enlarged footing anti-floating anchor rod as claimed in claim 9, wherein a foundation or a water-resistant plate is further poured above the cushion layer, and the pre-stressed matched anchor plate and the matched anchor plate are positioned in the foundation or the water-resistant plate.