CN213926393U

CN213926393U - Unbonded prestress anti-seepage anchor rod bearing body

Info

Publication number: CN213926393U
Application number: CN202022757412.3U
Authority: CN
Inventors: 金航华; 金国喜
Original assignee: Hangzhou Zhongqiao Geotechnical Industry Co ltd
Current assignee: Zhejiang Zhongqiao Prestress Equipment Co ltd
Priority date: 2020-08-19
Filing date: 2020-11-25
Publication date: 2021-08-10
Anticipated expiration: 2030-11-25
Also published as: CN112281930A; CN214460686U; CN111827369A; CN112281929A

Abstract

The utility model relates to a construction technical field discloses an unbonded prestressing force prevention of seepage stock supporting body, supporting body are used for setting up the front end with unbonded steel strand wires at a plurality of anchors, the supporting body includes loading board, a plurality of the front end fixed connection respectively of unbonded steel strand wires in the loading board, the loading board is deviating from one side sealing connection of unbonded steel strand wires has the sealed cowling, the sealed cowling is located a plurality of the periphery of unbonded steel strand wires. The utility model provides a non-adhesive prestress anti-seepage anchor rod supporting body, which is provided with a sealing cover to lead the non-adhesive steel strand inside to be positioned in a closed space, and can play the roles of separating and preventing the base water, namely the underground water from permeating through the outer wall gap of the non-adhesive steel strand and the inner gap of the wire diameter of the steel strand; the sealing cover can effectively prevent groundwater from infiltrating into the bearing body, thereby effectively preventing steel from being rusted and ensuring the durability of the anti-floating anchor rod.

Description

Unbonded prestress anti-seepage anchor rod bearing body

Technical Field

The utility model relates to a construction technical field especially relates to an unbonded prestressing force prevention of seepage stock supporting body.

Background

Along with the rapid development of economy, the acceleration of city construction, the increasingly tense city land use, basement development and utilization get the attention of developers, the utilization requirement on basement space is gradually improved, the basement area is larger and larger, the depth is deeper and deeper, therefore, the basement structure is larger and larger under the buoyancy, the problem of how to solve the anti-floating problem of the basement becomes a problem which is often faced, and the wide attention of engineers is aroused. In recent years, more basements adopt anchor rods as structural anti-floating calculation bases.

The drilling hole penetrates through the soft rock stratum, one end of the drilling hole is anchored in the hard rock stratum, then the drilling hole is tensioned at the other free end of the drilling hole and anchored on the bottom plate of the building structure, so that pressure is applied to the bottom plate of the structure, the concrete bottom plate is anchored, and the concrete bottom plate has the anti-floating function, namely the anti-floating anchor rod prestress. The anti-floating anchor rod has wide application at home and abroad, and the application field relates to water conservancy and hydropower, industrial and civil building environment management, military engineering and the like. However, the existing anti-floating anchor rod generally has the problems that steel is easy to rust and the use durability is poor.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at providing an unbonded prestressing force prevention of seepage stock supporting body for solve or partially solve current anti-floating anchor ubiquitous steel and easily rust, use the relatively poor problem of durability.

(II) technical scheme

In order to solve the technical problem, the utility model provides an unbonded prestressing force prevention of seepage stock supporting body, supporting body are used for setting up the front end at a plurality of anchors with unbonded steel strand wires, the supporting body includes loading board, a plurality of front end fixed connection respectively of unbonded steel strand wires in the loading board, the loading board is deviating from one side sealing connection of unbonded steel strand wires has the sealed cowling, the sealed cowling is located a plurality of the periphery of unbonded steel strand wires.

On the basis of the scheme, a convex side wall surface is formed on the side surface, connected with the sealing cover, of the bearing plate, the sealing cover is connected with the side wall surface, and a sealing gasket is arranged between the sealing cover and the bearing plate.

On the basis of the scheme, the device further comprises a fastening pipe which sequentially penetrates through the sealing cover and the bearing plate, the end part, located on one side, away from the sealing cover, of the bearing plate is used for being in sealing connection with a central grouting pipe, and the end part, located outside the sealing cover, of the fastening pipe is fastened to the sealing cover in a sealing mode.

On the basis of the scheme, the front ends of the unbonded steel strands penetrate through the bearing plate, and one side of the bearing plate, which deviates from the unbonded steel strands, is arranged on the bearing plate in an extruding mode.

On the basis of the scheme, the front ends of the plurality of unbonded steel stranded wires are connected with sealing pressure pipes in a one-to-one correspondence mode, one ends of the sealing pressure pipes penetrate through the bearing plate from one side, deviating from the sealing cover, of the bearing plate and are fastened to the bearing plate, and the sealing pressure pipes are used for allowing the unbonded steel stranded wires to penetrate through.

On the basis of the scheme, a sealing gasket is arranged between the sealing pressure pipe and the side face, deviating from the sealing cover, of the bearing plate.

On the basis of the above scheme, still include with the extruded article that does not have bonding steel strand wires one-to-one and set up, the extruded article is used for the loading board is connected one side cover of sealing boot is established the outside of not bonding steel strand wires.

On the basis of the scheme, the bearing body further comprises a guide bracket assembly, and the guide bracket assembly is arranged on one side, deviating from the unbonded steel strand, of the bearing plate and fixedly connected to the bearing plate.

On the basis of the scheme, the guide bracket component comprises a plurality of guide frames, and the plurality of guide frames are uniformly connected to the bearing plate along the circumferential direction of the bearing plate.

On the basis of the scheme, one ends, far away from the bearing plate, of the guide frames are connected to the fixing sleeve in a gathering mode.

(III) advantageous effects

The utility model provides a non-adhesive prestress anti-seepage anchor rod supporting body, which is provided with a sealing cover to lead the non-adhesive steel strand inside to be positioned in a closed space, and can play the roles of separating and preventing the base water, namely the underground water from permeating through the outer wall gap of the non-adhesive steel strand and the inner gap of the wire diameter of the steel strand; the sealing cover can effectively prevent groundwater from infiltrating into the bearing body, thereby effectively preventing steel from being rusted and ensuring the durability of the anti-floating anchor rod.

Drawings

Fig. 1 is a schematic connection diagram of an unbonded prestressed impermeable anchor rod supporting body provided by the present invention;

fig. 2 is a schematic view of a guide bracket assembly according to the present invention;

FIG. 3 is a detailed view of the supporting body of the present invention;

FIG. 4 is a schematic view of a fastening tube according to the present invention;

fig. 5 is a schematic diagram of the middle sealing pressure pipe of the present invention.

Description of reference numerals:

wherein, 1, the unbonded steel strand; 2. a carrier plate; 3. a guide frame; 4. fixing a sleeve; 5. a fastener; 6. a sealing cover; 7. fastening the tube; 71. a boss; 8. a nut; 9. a gasket; 10. an anti-corrosive medium; 11. an extrusion; 12. sealing the pressing pipe; 121. a step; 13. a spiral rib; 14. and a restraining ring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the embodiment of the utility model provides an unbonded prestressing force prevention of seepage stock supporting body, the supporting body is used for setting up at the front end of a plurality of anchors with unbonded steel strand wires 1, the supporting body includes loading board 2, a plurality of the front end difference fixed connection of unbonded steel strand wires 1 in loading board 2. Referring to fig. 3, the bearing plate 2 is connected with a sealing cover 6 at one side deviating from the unbonded steel strand, and the sealing cover 6 is located at the periphery of the plurality of unbonded steel strands 1. The unbonded steel stranded wires 1 in the sealing cover 6 are in a closed space, so that the upward seepage of base water, namely underground water, through gaps on the outer wall of the unbonded steel stranded wires 1 and gaps inside the wires of the steel stranded wires in the diameter direction can be prevented. The sealing cover can effectively prevent groundwater from infiltrating into the bearing body, thereby effectively preventing steel from being rusted and ensuring the durability of the anti-floating anchor rod.

On the basis of the above embodiment, further, the carrier further includes a guide bracket assembly. The guide bracket component is in the loading board 2 deviates from one side fixed connection of unbonded steel strand 1 in loading board 2.

The unbonded steel strand 1 is a main body component of an anchor rod structure, in particular an anchor cable. The front end of the anchor rod extends into the drill hole to reach the bottom of the drill hole, and the tail end of the anchor rod is connected with a concrete bottom plate layer of the building, so that the building is fixed in geological layers such as rock strata, drawing force is applied to the building, and the anti-floating performance of the building is improved. The front ends of the plurality of unbonded steel strands 1 are respectively connected with the bearing plate 2, and one forward side of the bearing plate 2 is connected with the guide support assembly. Namely, the unbonded steel strand 1 and the guide bracket component are positioned at two sides of the bearing plate 2.

According to the unbonded prestressed anti-seepage anchor rod bearing body provided by the embodiment, the bearing plate 2 and the guide support assembly are connected and arranged at the front end of the unbonded steel stranded wire 1, so that the guide effect can be achieved when the unbonded steel stranded wire 1 penetrates into a drill hole, and an anchor cable can conveniently and smoothly penetrate into the drill hole; secondly, when the bottom of the drill hole is not thoroughly cleaned, the guide support assembly is positioned at the foremost end of the anchor cable, so that after the anchor cable penetrates into the bottom, a certain distance can be generated between the bearing plate 2 and geological layers at the bottom of the drill hole, such as sediment and the like, the effectiveness of later grouting is ensured, and the drawing resistance and the anchoring effect are improved; in addition, the guide bracket component can also play a certain anchoring effect, can increase the anti-pulling friction resistance of the anchor cable, and further improves the overall anti-pulling force and anchoring effect of the anchor cable.

On the basis of the above embodiment, further, the guide bracket assembly includes a plurality of guide frame 3, and a plurality of guide frame 3 evenly connect in along the circumference of loading board 2 in loading board 2.

On the basis of the above embodiment, further, referring to fig. 2, one end of each of the guide frames 3 away from the bearing plate 2 is collectively connected to the fixing sleeve 4.

Specifically, referring to fig. 1 and 2, the guide bracket assembly in the supporting body provided in this embodiment is formed by pressing three round steels, and the front ends of the round steels are equally divided according to an angle and welded, and are sleeved into the fixing sleeve 4 for welding. Wherein the rear end is provided with a threaded end which penetrates into the bearing plate 2 and then can be fastened and connected by a fastening nut 8 through a fastening piece 5. This guide bracket assembly's connection sets up the guide effect that the structure can be better when penetrating drilling to and form relative space between loading board 2 and drilling bottom and guarantee the validity of later stage slip casting, and multiplicable resistance to plucking rubs and hinders.

Further, the leading truck 3 of leading truck subassembly also can be other shapes such as square steel, also can be connected through modes such as welding between leading truck 3 and the loading board 2, and the concrete quantity of leading truck 3 also can be other, can set up shape, quantity and the connected mode of leading truck 3 in a flexible way according to actual need, specifically do not restrict.

On the basis of the above embodiment, further, referring to fig. 3, the side of the bearing plate 2 connected to the guide bracket assembly is configured with a convex side wall surface, the sealing cover 6 is connected to the side wall surface, and a sealing gasket 9 is arranged between the sealing cover 6 and the bearing plate 2. The sealing gasket 9 serves to achieve a sealing connection between the sealing cap 6 and the carrier plate 2. The side of the bearing plate 2 connected with the guide bracket assembly is the side of the bearing plate 2 departing from the unbonded steel strand. Specifically, the sealing cover 6 can be a tubular structure with an opening at one end, a boss is arranged on the side surface of the bearing plate 2 connected with the guide support assembly, and a side wall surface matched and connected with the sealing cover 6 is formed on the side surface of the boss. The opening end of the sealing cover 6 can be connected with the side wall surface of the boss in a threaded mode or welded mode. Further, a connecting groove may be provided on the side surface of the carrier plate 2, and the open end of the sealing groove may be inserted into the connecting groove for connection.

On the basis of the above embodiment, further, the unbonded prestressed impermeable anchor bolt carrier further comprises a fastening pipe 7 sequentially penetrating through the sealing cover 6 and the bearing plate 2. The fastening pipe 7 is located the bearing plate 2 deviates from the tip of guide bracket assembly one side is used for with central slip casting pipe sealing connection. In particular, referring to fig. 4, a boss 71 may be disposed on the outer wall of the fastening tube 7, and the boss 71 abuts against the side of the loading plate 2 away from the guide bracket assembly. The central grouting pipe may be connected to the fastening pipe 7 by means of threads or welding or the like. And a sealing gasket 9 can be arranged between the central grouting pipe and the fastening pipe 7 at the joint. A sealing gasket 9 can also be arranged between the boss 71 and the side surface of the bearing plate 2 to realize sealing connection.

The end of the fastening tube 7 located outside the sealing cover 6 is fastened to the sealing cover 6 in a sealing manner. The end portion can be connected with a nut 8 and is fastened on the outer surface of the sealing cover 6 through the nut 8. And a sealing gasket 9 can be arranged between the nut 8 and the sealing cover 6 for sealing.

On the basis of the above embodiment, further, the front ends of the plurality of unbonded steel strands 1 penetrate through the bearing plate 2 and are arranged on the bearing plate 2 in a manner of being extruded on one side of the bearing plate 2 departing from the unbonded steel strands 1.

On the basis of the above embodiment, further, referring to fig. 3, the front ends of the plurality of unbonded steel strands 1 are connected with sealing pressure pipes 12 in a one-to-one correspondence manner, and one end of each sealing pressure pipe 12 penetrates through the bearing plate 2 from one side of the bearing plate 2 departing from the guide bracket assembly and is fastened to the bearing plate 2. Can be fastened on the side of the carrier plate 2 to which the guide bracket assembly is connected by means of a nut 8. A sealing gasket 9 may be provided between the nut 8 and the carrier plate 2. The sealing pressure pipe 12 is used for the unbonded steel strand 1 to pass through. Referring to fig. 5, a step 121 can be provided on the outer wall of the sealing pressure tube 12, the step 121 abutting against the side of the carrier plate 2 facing away from the guide bracket assembly.

On the basis of the above embodiment, further, a sealing gasket 9 is arranged between the sealing pressure pipe 12 and the side surface of the bearing plate 2 departing from the guide bracket assembly.

On the basis of the above embodiment, further, refer to fig. 3, an unbonded prestressing force prevention of seepage stock supporting body still include with the extruded piece 11 that unbonded steel strand wires 1 one-to-one set up, extruded piece 11 is used for bearing board 2 is connected a side cover of guide bracket subassembly is established the outside of unbonded steel strand wires 1. The extrusion piece 11 is sleeved outside the part of the unbonded steel strand 1, which penetrates out of the sealing pressure pipe 12 and is positioned on one side of the bearing plate 2 connected with the guide bracket assembly. May be a compression sleeve or a compression spring.

Furthermore, one side of the bearing plate 2, which is far away from the guide bracket assembly, is connected with a plurality of spiral ribs 13 arranged on the periphery of the unbonded steel strand 1. Referring to fig. 1, in the present embodiment, a spiral rib 13 is connected to a rear side of the carrier plate 2 of the carrier, and the spiral rib 13 is located at the periphery of the unbonded steel strand 1 connected to the carrier plate 2.

On the basis of the above embodiment, further, from the front end to the tail end of the unbonded steel stranded wire 1, a plurality of the unbonded steel stranded wires 1 are sequentially provided with the restraining rings 14 and the isolation brackets in a staggered manner (the isolation brackets are not shown in fig. 1). Namely, a restraint ring 14 is arranged from the front end of the unbonded steel strand 1, and then an isolation bracket is arranged in sequence in a staggered mode. The distribution of the unbonded steel stranded wires 1 is more orderly, and the better distribution of the unbonded steel stranded wires 1 in the drilled holes is facilitated, so that the pulling resistance is improved.

On the basis of the embodiment, further, the embodiment relates to the field of underground construction, and discloses an anti-floating anchor cable for buildings, which comprises the bearing body in the embodiment; the bearing body comprises a guide bracket with one end trisected by welding round steel, a bearing plate 2, an extrusion sleeve, a fastening pipe 7, a sealing pressure pipe 12, a sealing cover 6 and other accessories arranged on the structure for fixing; leading anchor end is the front end and is linked to each other by loading board 2 and guide bracket promptly supporting body and form relative space, and the unbonded steel strand wires 1 penetrates loading board 2 after the extrusion, carries out axial fixity to the unbonded steel strand wires 1 of extrusion end by sealed pressure pipe 12, extrusion cover, bolt, prevents that unbonded steel strand wires 1 from wearing to move, settles spiral muscle 13 behind loading board 2. The subsequent unbonded steel strand 1 is provided with the restraining ring 14 and the isolation bracket at opposite distances.

The fixing sleeve 4 is used for fixing the guide bracket, so that the guidance performance is improved. The guide frame 3 plays a role in guiding and centering, the anti-pulling force is increased, and the insufficient strength of concrete at the end of the bearing body caused by bottom hole sediment is avoided. The central grouting pipe is used for high-pressure grouting. The sealing cover 6 is used for sealing protection among an anchoring structure body comprising a built-in fixed end anchorage, a steel strand/pressure sleeve and a bearing body. The interior of the sealing cap 6 is filled with a protective medium 10. The protective medium 10 protects the built-in anchorage structure assembly against rust and leakage. The steel strand is connected with an anchorage device (an extrusion sleeve/a spring) in an occlusion way, and the occlusion pulling resistance of the steel strand meets the requirements of GB/T14370-2015. The bearing plate 2 is characterized in that the bearing and anti-interference capabilities of the bearing plate 2 under the support of concrete meet the requirements under the relative acting force of the steel strands of the anchorage device. The sealing pressure pipe 12 is formed by extruding and bonding the steel strand outer sleeve and is sealed when being connected with the bearing plate 2, so that the sealing of the steel strand and the anchoring end interface is ensured. The spiral reinforcement 13 is used for enhancing the strength of concrete at the lower end of the anchor. The unbonded steel strand 1 is a carrier for connecting the lower fixed end of the anchor with the upper structure end of the anchor and is a bearing body with bidirectional acting force.

The steel strand central restraint ring 14 is combined with the isolation support to increase the friction resistance of the steel strand and improve the mechanical property of the concrete structure. The steel strand isolation support ensures the uniform installation of the steel strands, ensures the uniform stress of the stress body, and is combined with the steel strand central restraint ring 14 to form friction resistance and mechanical properties. The locking nut 8 has the functions of fastening and sealing the connecting piece. The sealing gasket 9 is arranged on the anchoring structure body of the fixed-end anchorage device: the steel strand is arranged between the pressure pipe and the bearing body; and the central grouting pipe is hermetically protected with a protective cover.

The anti-floating anchor cable of building underground engineering that this embodiment provided, through leading bearing anchor, realize the powerful anchor withdrawal resistance of work cable after the stretch-draw, solved the little problem of withdrawal resistance of ordinary anti-floating anchor pole.

The guide frame 3 of the bearing body is connected with the bearing plate 2 through a nut 8, so that assembly and installation are facilitated; the main functions of the guide frame 3 are: guiding the anchor cable when the anchor cable penetrates into the drill hole; when the bottom of the drill hole is not thoroughly cleaned, the anchor cable penetrates into the bottom to ensure that the bearing plate 2 is away from the sediment at a certain distance, so that the effectiveness of later grouting is ensured; increasing the resistance to plucking and rubbing. The rear-mounted anchoring end guide bracket is also formed by pressing three round steel bars, penetrates into the bearing plate 2 equally according to the angle, and is fastened and connected or welded by nuts 8. The rear anchoring end is additionally changed according to different bottom soil texture structures, so that the pulling resistance is improved. The positioning pressing plate fixes the extruded unbonded steel strand 1 on the bearing plate 2. The bearing plate 2 and the unbonded steel strand 1 are prevented from moving through.

Integrally installing an anchor cable: taking the length and the number of the unbonded steel stranded wires 1 required by the front anchoring end and the rear anchoring end according to the drawing requirements, and peeling PE sheaths with the length of 100mm from the same end of the unbonded steel stranded wires 1; corresponding parts such as the bearing plate 2, the spiral ribs 13, the restraint rings 14, the isolation frame and the like are sequentially penetrated in opposite positions; extruding and mounting the sheath stripping end of the unbonded steel strand 1 by using an extruder; and fixedly mounting the components at relative positions.

The guide frame 3 is connected with the bearing steel plate, namely the bearing plate 2 through bolts, end sediment is well avoided, and the pulling resistance is improved. The anti-floating anchor cable for the building provided by the embodiment can be used for the unbonded steel stranded wires 1 (such as phi 12.7, phi 15.2, phi 17.8, phi 21.6, phi 21.8 and the like) with different quantities and different specifications and can realize branch end bearing. This anti type anchor rope that floats needs loading board 2 to fix in the construction, and the bearing capacity of stock, loading board 2, sealed cowling, guide bracket can be strengthened, can effectively improve construction quality and progress.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an unbonded prestressing force prevention of seepage stock supporting body, its characterized in that, the supporting body is used for setting up the front end with unbonded steel strand wires at a plurality of anchors, the supporting body includes the loading board, a plurality of the front end fixed connection respectively of unbonded steel strand wires in the loading board, the loading board is deviating from one side sealing connection of unbonded steel strand wires has the sealed cowling, the sealed cowling is located a plurality of unbonded steel strand wires's periphery.

2. The unbonded prestressed impermeable anchor shank carrier of claim 1, wherein the side of the carrier plate connected to the sealing cap is configured with a convex side wall surface, the sealing cap is connected to the side wall surface and a gasket is provided between the sealing cap and the carrier plate.

3. The unbonded prestressed impermeable anchor shank carrier of claim 1, further comprising a fastening tube passing through the sealing cap and the carrier plate in sequence, wherein the end of the fastening tube on the side of the carrier plate facing away from the sealing cap is used for sealing connection with a central grouting tube, and the end of the fastening tube on the outside of the sealing cap is sealingly fastened to the sealing cap.

4. The unbonded prestressed impermeable anchor shank carrier of any one of claims 1 to 3, wherein the front ends of the plurality of unbonded steel strands are press-fitted through the carrier plate to the carrier plate on the side of the carrier plate facing away from the unbonded steel strands.

5. The unbonded prestressed impermeable anchor rod carrier according to claim 4, wherein the front ends of the plurality of unbonded steel strands are connected with sealing pressure pipes in a one-to-one correspondence manner, one end of each sealing pressure pipe penetrates through the bearing plate from the side of the bearing plate away from the sealing cover and is fastened to the bearing plate, and the sealing pressure pipes are used for the unbonded steel strands to penetrate through.

6. The unbonded prestressed impermeable anchor shank carrier of claim 5, wherein a gasket is provided between the sealing pressure tube and the side of the carrier plate facing away from the sealing cap.

7. The unbonded prestressed impermeable anchor rod carrier of claim 4, further comprising an extrusion member disposed in one-to-one correspondence with the unbonded steel strands, wherein the extrusion member is used for sleeving one side of the bearing plate connected with the sealing cover on the outside of the unbonded steel strands.

8. The unbonded prestressed impermeable anchor shank carrier of any one of claims 1 to 3, further comprising a guide bracket assembly fixedly attached to the carrier plate on a side of the carrier plate facing away from the unbonded steel strands.

9. The unbonded prestressed impermeable anchor shank carrier of claim 8, wherein the guide bracket assembly comprises a plurality of guide brackets, the plurality of guide brackets being uniformly connected to the carrier plate along the circumference of the carrier plate.

10. The unbonded prestressed impermeable anchor shank carrier of claim 9, wherein the ends of said guide frames remote from said carrier plate are collectively connected to a fixing sleeve.