CN214460686U

CN214460686U - Unbonded prestress anti-seepage anchor cable

Info

Publication number: CN214460686U
Application number: CN202022768490.3U
Authority: CN
Inventors: 金航华; 金国喜
Original assignee: Hangzhou Zhongqiao Geotechnical Industry Co ltd
Current assignee: Hangzhou Zhongqiao Geotechnical Industry Co ltd
Priority date: 2020-08-19
Filing date: 2020-11-25
Publication date: 2021-10-22
Anticipated expiration: 2030-11-25
Also published as: CN213926393U; CN112281930A; CN112281929A; CN111827369A

Abstract

The utility model relates to a construction technical field discloses an unbonded prestressing force prevention of seepage anchor rope, including a plurality of unbonded steel strand wires, between the both ends of a plurality of unbonded steel strand wires, the length direction along unbonded steel strand wires is equipped with at least one stagnant water carrier assembly, and stagnant water carrier assembly includes stagnant water board and support frame, and stagnant water board is used for passing unbonded steel strand wires and with the sealed cooperation of unbonded steel strand wires, and the support frame is connected in one side of stagnant water board orientation unbonded steel strand wires front end. The utility model provides a pair of unbonded prestressing force prevention of seepage anchor rope sets up stagnant water carrier assembly along the length direction of unbonded steel strand wires, specifically sets up stagnant water board and support frame and can form pressure type anti-floating anchor rod, through adopting unbonded steel strand wires and multistage anchor bearing structure mode, multiplicable resistance to plucking improves the anchor effect, is favorable to solving the effect shearing force that groundwater come-up and building gravity formed and causes bottom plate, post roof beam fracture phenomenon.

Description

Unbonded prestress anti-seepage anchor cable

Technical Field

The utility model relates to a construction technical field especially relates to an unbonded prestressing force prevention of seepage anchor rope.

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 anchor rope for solve or partially solve current anti-floating anchor rod 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 anchor rope, including a plurality of unbonded steel strand wires, a plurality of between the both ends of unbonded steel strand wires, the length direction along unbonded steel strand wires is equipped with at least one stagnant water and bears the weight of the subassembly, stagnant water bears the weight of the subassembly and includes sealing plate and support frame, the sealing plate is used for passing unbonded steel strand wires and with the sealed cooperation of unbonded steel strand wires, the support frame connect in sealing plate orientation one side of unbonded steel strand wires front end.

On the basis of the scheme, the water-stopping bearing assembly further comprises sealing pressure pipes which are connected with the plurality of unbonded steel stranded wires in a one-to-one correspondence mode, one ends of the sealing pressure pipes penetrate through the water-stopping plate from one side, connected with the supporting frame, of the water-stopping plate and are fastened on the water-stopping plate, and the sealing pressure pipes are used for allowing the unbonded steel stranded wires to penetrate through.

On the basis of the scheme, the outer wall of the sealing pressure pipe is provided with a step surface, the step surface is abutted against the side surface of the water stop plate connecting support frame, and a sealing gasket is arranged between the step surface and the water stop plate.

On the basis of the scheme, the sealing pressure pipe is fastened on one side, deviating from the supporting frame, of the water stop plate through a nut.

On the basis of the scheme, one end of the support frame, which is far away from the water stop plate, is provided with an inward bending part.

On the basis of the scheme, the tail ends of the plurality of unbonded steel strands penetrate out of the concrete bottom plate from the inner side of the concrete bottom plate and are anchored and connected to the outer surface of the concrete bottom plate.

On the basis of the scheme, the unbonded steel strand penetrates through an anchor backing plate arranged on the outer surface of the concrete bottom plate and is anchored through an anchor; one side of the anchor backing plate facing the concrete bottom plate is connected with embedded steel bars, and the embedded steel bars are located inside the concrete bottom plate.

On the basis of the scheme, a sealing cover is hermetically connected to one side of the anchor backing plate, which is far away from the concrete bottom plate, and the sealing cover is positioned on the peripheries of the anchorage device and the unbonded steel strand; and anticorrosive filling materials are filled in the sealing cover.

On the basis of above-mentioned scheme, a plurality of the front end of no bonding steel strand wires is connected with front end bearing assembly, front end bearing assembly includes loading board and guide bracket subassembly, a plurality of front end fixed connection respectively in of no bonding steel strand wires the loading board, guide bracket subassembly is in the loading board deviates from one side fixed connection in of no bonding steel strand wires in the loading board.

On the basis of the scheme, the guide bracket component comprises a plurality of guide frames, the plurality of guide frames are arranged along the circumferential direction of the bearing plate and are uniformly connected with the bearing plate and the guide frames, and the guide frames are far away from one ends of the bearing plate and are connected with the fixing sleeve in a gathering manner.

(III) advantageous effects

The utility model provides a pair of unbonded prestressing force prevention of seepage anchor rope sets up stagnant water carrier assembly along the length direction of unbonded steel strand wires, specifically sets up stagnant water board and support frame and can form pressure type anti-floating anchor rod, through adopting unbonded steel strand wires and multistage anchor bearing structure mode, multiplicable resistance to plucking improves the anchor effect, is favorable to solving the effect shearing force that groundwater come-up and building gravity formed and causes bottom plate, post roof beam fracture phenomenon.

Drawings

Fig. 1 is an overall schematic view of an unbonded prestressed impermeable anchor cable provided by the present invention;

fig. 2 is a schematic view of the middle water stop bearing assembly of the present invention;

fig. 3 is a schematic view of a sealing gasket in the middle water stop bearing assembly of the present invention;

FIG. 4 is a schematic view of the anchoring of the ends of unbonded steel strands in the present invention;

fig. 5 is a schematic structural view of the front end bearing assembly of the present invention;

fig. 6 is a schematic view of a guide bracket assembly according to the present invention;

FIG. 7 is a schematic view of a fastening tube according to the present invention;

fig. 8 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 surface; 13. a spiral rib; 14. a confinement ring; 15. an isolation support; 16. a water stop plate; 17. a support frame; 18. sealing the pressing pipe; 19. a gasket; 20. a nut; 21. an anchor backing plate; 22. an anchorage device; 23. a sealing cover; 24. anticorrosive fillers; 25. a nut; 26. a fixing plate; 27. a working clamping piece; 28. and a gasket.

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 anchor rope, this unbonded prestressing force prevention of seepage anchor rope include a plurality of unbonded steel strand wires 1, a plurality of between the both ends of unbonded steel strand wires 1, be equipped with at least one stagnant water bearing component along the length direction of unbonded steel strand wires 1, stagnant water bearing component includes sealing plate 16 and support frame 17, sealing plate 16 is used for passing unbonded steel strand wires 1 and with the sealed cooperation of unbonded steel strand wires 1, support frame 17 connect in sealing plate 16 is towards the one side of unbonded steel strand wires 1 front end.

The unbonded steel strand 1 is a main body component of the anchor cable. The front end of the anchor cable extends into the drill hole to reach the bottom of the drill hole, and the tail end of the anchor cable 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. A water stop bearing component can be arranged along the length direction of the unbonded steel strand 1. The support frame 17 is connected to the forward side of the water stop plate 16, and is used for playing a certain guiding role and an anchoring role at the position where the water stop bearing assembly is arranged on the anchor cable, so that the uplift friction resistance is increased.

The embodiment provides a pair of unbonded prestress anti-seepage anchor rope sets up stagnant water carrier assembly along the length direction of unbonded steel strand wires 1, specifically sets up stagnant water board 16 and support frame 17 and can form pressure type anti-floating anchor rod, through adopting unbonded steel strand wires 1 and multistage anchor bearing structure mode, multiplicable resistance to plucking improves the anchor effect, is favorable to solving the effect shearing force that groundwater come-up and building gravity formed and causes bottom plate, post roof beam fracture phenomenon. The water stop plate 16 is in sealing fit with the unbonded steel stranded wires, so that the effects of blocking and preventing the base water, namely the underground water from permeating through the gaps on the outer wall of the unbonded steel stranded wires and the gaps inside the wires of the steel stranded wires in a diameter-twisted manner can be achieved; the infiltration of groundwater to stagnant water carrier assembly can be effectively prevented to effectively prevent steel corrosion, guarantee the durability of anti-floating anchor rod.

Further, the support frame 17 includes a plurality of independent guide frames, and a plurality of guide frames are evenly connected to the water stop plate 16 along the circumference of the water stop plate 16. The front ends of a plurality of guide frames of the supporting frame 17 can be mutually independent and can also be connected to the fixed sleeve in a gathering way. The concrete quantity and the concrete position of setting up of stagnant water carrier assembly can set up according to different bottom soil texture to improve withdrawal resistance. Namely, a water-stop bearing component can be additionally arranged at the position needing to be reinforced and increasing the anti-pulling force. The support 17 may be secured to the water stop plate 16 by threads and nuts.

On the basis of the above embodiment, further, referring to fig. 2, the water-stop bearing assembly further includes a sealing pressure pipe 18 connected to the plurality of unbonded steel strands 1 in a one-to-one correspondence manner, and one end of the sealing pressure pipe 18 penetrates through the water-stop plate 16 from the side of the water-stop plate 16 connected to the support frame 17 and is fastened to the water-stop plate 16. Can be fastened by means of a nut 20 on the side of the water stop plate 16 facing away from the support frame 17. A gasket may be provided between the nut 20 and the water stop plate 16. The sealing pressure pipe 18 is used for the unbonded steel strand 1 to pass through. The sealing pressure pipe 18 is in sealing fit with the unbonded steel strand 1.

On the basis of the above embodiment, further referring to fig. 8, a step surface is provided on the outer wall of the sealing pressure pipe 18, and the step surface abuts against the side surface of the water stop plate 16 connected to the support frame 17. Referring to fig. 2, a sealing gasket 19 is arranged between the step surface and the water stop plate 16.

Specifically, referring to fig. 3, the gasket 19 is L-shaped. The horizontal side edge of the sealing gasket 19 is inserted into the opening corresponding to the sealing pressure pipe 18 on the water stop plate 16, and the vertical side edge of the sealing gasket 19 is clamped between the step surface of the sealing pressure pipe 18 and the water stop plate 16, so that better sealing is facilitated. The water-stopping bearing component has a good anti-seepage effect.

On the basis of the above-described embodiment, further, referring to fig. 2, the sealing pressure pipe 18 is fastened by a nut 20 on the side of the water stop plate 16 facing away from the support frame 17.

On the basis of the above embodiment, further, one end of the supporting frame 17 away from the water stop plate 16 has an inward bent portion. That is, the support frame 17 is L-shaped, which is favorable for better anchoring.

On the basis of the above embodiment, further, the tail ends of the plurality of unbonded steel strands 1 penetrate out of the concrete bottom plate from the inner side of the concrete bottom plate and are anchored and connected to the outer surface of the concrete bottom plate.

On the basis of the above embodiment, further, referring to fig. 4, the unbonded steel strand 1 passes through an anchor backing plate 21 arranged on the outer surface of the concrete bottom plate and is anchored by an anchor 22; one side of the anchor backing plate 21 facing the concrete bottom plate is connected with embedded steel bars, and the embedded steel bars are located inside the concrete bottom plate.

The tail ends of the plurality of unbonded steel strands 1 penetrate through the concrete bottom plate; the tail ends of the plurality of unbonded steel strands 1 penetrate out of the outer surface of the concrete bottom plate, penetrate through the anchor backing plate 21 and are anchored on the outer surface of the concrete bottom plate through the anchorage device 22. One side of the anchor backing plate 21 facing the concrete bottom plate is connected with embedded steel bars, and the embedded steel bars are located inside the concrete bottom plate. Furthermore, the periphery of the plurality of unbonded steel strands 1 on the inner side of the outer surface of the concrete bottom plate can also be provided with spiral ribs. The helical ribs may be attached to the anchor pad 21 as shown in figure 1.

On the basis of the above embodiment, further, a plurality of unbonded steel strands 1 are arranged in the grouting hole, and a water stop member is arranged between the grouting hole and the inner surface of the concrete bottom plate. The grouting holes are drilled holes and are used for grouting after the anchor cables are placed. The water-stopping piece can improve the waterproof performance. The water stop piece can be pre-buried in the concrete bottom plate and extends to the grouting hole. The water stop plate 16 can be anchored and connected to the concrete bottom plate through embedded steel bars. The central grouting pipe can be arranged, and grouting can be performed into the drilled hole through the central grouting pipe after the anchor cable penetrates into the grouting hole.

On the basis of the above embodiment, further referring to fig. 4, a sealing cover 23 is hermetically connected to the anchor backing plate 21 on the side away from the concrete bottom plate, and the sealing cover 23 is located at the periphery of the anchorage device 22 and the unbonded steel strand 1; the inside of the sealing cover 23 is filled with anti-corrosion filling material 24. Further, the ends of the plurality of unbonded steel strands 1 pass through the anchorage device 22, then pass through the fixing plate 26 in sequence, and then are fastened on the fixing plate 26 through the nuts 25. A working clip 27 is provided between the fixing plate 26 and the anchor 22. The anchorage 22, the fixing plate 26, the working clip 27 and the nut 25 are all positioned inside the sealing cover 23, and have good waterproof sealing performance. And the anti-corrosion filling material 24 is filled in the sealing cover 23, so that the tail end of the unbonded steel stranded wire 1 can be firmly fixed.

On the basis of above-mentioned embodiment, furtherly, a plurality of the front end of bondless steel strand wires is connected with front end bearing assembly, front end bearing assembly includes loading board and guide bracket subassembly, a plurality of front end fixed connection respectively in bondless steel strand wires the loading board, guide bracket subassembly is in the loading board deviates from one side fixed connection in bondless steel strand wires the loading board. 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, the bearing plate 2 can be ensured to generate a certain distance with geological layers at the bottom of the drill hole, such as sludge 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 component includes a plurality of leading truck, and a plurality of leading truck follows the circumference of loading board evenly connect in the loading board, a plurality of the leading truck is kept away from the one end of loading board is collected and is connected in fixed cover.

Specifically, referring to fig. 5 and 6, the guide bracket assembly in the front end bearing assembly provided in this embodiment is formed by pressing three round bars, and the front end is equally divided according to an angle and welded, and then 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. 5, the bearing plate 2 is hermetically connected with a sealing cover 6 at one side connected with the guide bracket assembly, 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.

On the basis of the above-described embodiment, further, with reference to fig. 5, the side of the carrier plate 2 that is connected to the guide bracket assembly is configured with a convex side wall surface, a sealing cover 6 is connected to the side wall surface, and a sealing gasket 9 is provided between the sealing cover 6 and the carrier plate 2. The sealing gasket 9 serves to achieve a sealing connection between the sealing cap 6 and the carrier plate 2. 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 front end bearing assembly further comprises a fastening tube 7 passing through the sealing cover 6 and the bearing plate 2 in sequence. The fastening tube 7 is located at the end of the carrier plate 2 on the side facing away from the guide bracket assembly for sealing connection with the central grouting tube. In particular, referring to fig. 7, a boss 71 may be disposed on an outer wall of the fastening tube 7, and the boss 71 abuts against a side surface 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. 5, 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. 8, a step surface 121 may be provided on the outer wall of the sealing pressure tube 12, and the step surface 121 abuts against the side of the bearing 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 above-mentioned embodiment, further, refer to fig. 5, front end bearing assembly still include with do not have extruded article 11 that bonding steel strand wires 1 one-to-one set up, extruded article 11 is used for bearing board 2 is connected one side cover of guide bracket subassembly is established do not have the outside of bonding 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 strand 1, a plurality of unbonded steel strands 1 are sequentially provided with the restraining rings 14 and the isolating brackets 15 in a staggered manner. Namely, a restraint ring 14 is arranged from the front end of the unbonded steel strand 1, and then an isolation bracket 15 is arranged in sequence in a staggered mode. The distribution of the unbonded steel stranded wires 9 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.

Further, an isolation bracket 15 is arranged on the front side of the water stop plate in a close proximity mode; can be convenient for the connection of the unbonded steel strand 1 and the water stop plate.

On the basis of the above embodiment, further, the embodiment relates to the field of underground construction, and discloses an unbonded prestressed anti-seepage anchor cable; the water-stopping anchor assembly comprises an unbonded steel strand 1, a front end bearing assembly, a water-stopping bearing assembly and a tail end anchoring assembly. The front end bearing assembly comprises a guide support, a bearing plate 2, an extrusion sleeve, a fastening pipe 7, a sealing pressure pipe 12, a sealing cover 6 and other accessories which are arranged on a structural part and fixed, wherein one end of the guide support is welded by trisection round steel; 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 a restraining ring 14 and an isolating bracket 15 at opposite distances.

The middle anchoring end is connected with the support frame by the water stop plate and forms relative space, namely the water stop bearing assembly, the unbonded steel stranded wire 1 penetrates into the water stop plate after extrusion, the axial fixation is carried out on the unbonded steel stranded wire 1 at the extrusion end by the sealing pressure pipe 18, and the unbonded steel stranded wire 1 is prevented from penetrating and moving. The subsequent unbonded steel strands 1 are likewise provided with constraining loops 14 and spacer braces 15 at opposite distances. The tail end is provided with a water stop piece in front, and the tail stretching end is formed by combining a spiral rib 13, an anchor backing plate 21, an anchor 22 and a clamping piece. The anti-floating anchor cable for the underground construction provided by the embodiment has the advantages that the multi-end bearing anchoring of the front part and the stages is realized, the strong anchoring and anti-pulling force of the working cable is realized after tensioning, and the problem of small anti-pulling force of a common anti-floating anchor rod is solved.

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 restraint ring 14 and the isolation support 14 are combined for use, so that the friction resistance of the steel strand is increased, and the mechanical property of the concrete structure is improved. The isolation support 15 ensures the uniform installation of the steel strands, ensures the uniform stress of the stress body, and forms friction resistance and mechanical property with the steel strand central constraint ring. The

lock nuts

25, 20 and 8 are the joint tightening sealing action. The steel strand is connected with the anchorage in an occlusion manner, and the occlusion uplift resistance of the anchorage meets the requirements of GB/T14370-2015. The sealing

pressure pipes

12 and 18 are formed by extruding, bonding and sealing steel strand jackets, and are fastened by adopting a sealing gasket and a nut to ensure the sealing of the end interface of the steel strand and the water stop plate and block the infiltration of underground water. The water stop plate blocks and prevents the upward seepage of the foundation water, and is matched with the component pressing sleeve, the sealing gasket and the locking nut. The support frame is used for guiding and reinforcing the water stop plate and enhancing the concrete strength of the bearing body. The spiral rib strengthens the concrete strength at the lower end of the anchor. The anchor backing plate is characterized in that the bearing and anti-interference capabilities of the bearing plate under the support of concrete meet the requirements of an anchor under the relative acting force of steel strands. And the working clamping piece is used for locking the anchoring of the stretched anchorage device. Sealing covers 6 and 23, protecting the inside: the anchorage locking of the anchorage device at the tensioning end, the structural body loosening, the unbonded steel strand and the sealing protection among the bearing bodies. The anti-corrosion filling material such as cement mortar fills gaps between the anchor devices at the tensioning ends in the anchor device sealing cover, and the anti-leakage is realized.

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.

According to the unbonded prestress anti-seepage anchor cable, the front-mounted bearing anchor is adopted, the strong anchoring and pulling resistance of the working cable is realized after tensioning, and the problem of small pulling resistance of a common anti-floating anchor rod is solved.

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 sludge 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, guide bracket can be strengthened, can effectively improve construction quality and progress.

The front end of the unbonded steel strand is connected with a plurality of sections of bearing plates and a guide support to form a pressure type anti-floating anchor rod, so that the tensile edge concrete of the member can be ensured not to generate tensile stress. The problem that sediment treatment is not clean during drilling is solved through the guide support, and the cracking phenomenon of the bottom plate and the column beam caused by the action shearing force formed by upward floating of underground water and gravity of a building is solved through the structural mode of the unbonded steel strand and the multi-section anchoring supporting body; the non-adhesive steel strand can greatly improve the corrosion resistance of the steel strand, is beneficial to improving the service life of the anchor rope, and solves the problem that the design service life of a building cannot be met due to the failure of anchoring anti-pulling force caused by the corrosion of the metal surface body of the anti-floating anchor rod in the underground environment all year round.

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 anchor rope, its characterized in that includes a plurality of unbonded steel strand wires, is in a plurality of between the both ends of unbonded steel strand wires, be equipped with at least one stagnant water along the length direction of unbonded steel strand wires and bear the weight of the subassembly, stagnant water bears the weight of the subassembly and includes sealing plate and support frame, sealing plate is used for passing unbonded steel strand wires and with the sealed cooperation of unbonded steel strand wires, the support frame connect in sealing plate is towards one side of unbonded steel strand wires front end.

2. The unbonded prestressed impermeable anchor cable of claim 1, wherein the water-stop bearing assembly further comprises a sealing pressure pipe connected with the plurality of unbonded steel strands in a one-to-one correspondence, one end of the sealing pressure pipe passes through the water-stop plate from the side of the water-stop plate connected with the support frame and is fastened to the water-stop plate, and the sealing pressure pipe is used for the unbonded steel strands to pass through.

3. The unbonded prestressed impermeable anchor cable according to claim 2, wherein a step surface is provided on the outer wall of the sealing pressure pipe, the step surface abuts against the side surface of the water stop plate connection support frame, and a sealing gasket is provided between the step surface and the water stop plate.

4. The unbonded prestressed impermeable anchor rope according to claim 2, wherein the sealing pressure tube is fastened by a nut on the side of the water stop plate facing away from the support frame.

5. The unbonded prestressed impermeable anchor rope of any one of claims 1 to 4, wherein the end of said support frame remote from said water stop plate has an inward bend.

6. The unbonded prestressed impermeable anchor cable as claimed in any one of claims 1 to 4, wherein the ends of said plurality of unbonded steel strands extend from the inner side of the concrete bottom plate through said concrete bottom plate and are anchored to the outer surface of said concrete bottom plate.

7. The unbonded prestressed impermeable anchor cable of claim 6, wherein the unbonded steel strand is passed through an anchor backing plate arranged on the outer surface of the concrete bottom plate and anchored by an anchor; one side of the anchor backing plate facing the concrete bottom plate is connected with embedded steel bars, and the embedded steel bars are located inside the concrete bottom plate.

8. The unbonded prestressed impermeable anchor cable of claim 7, wherein the anchor backing plate is sealingly connected with a sealing cover at a side facing away from the concrete bottom plate, and the sealing cover is positioned at the periphery of the anchor and the unbonded steel strand; and anticorrosive filling materials are filled in the sealing cover.

9. The unbonded prestressed impermeable anchor cable of any one of claims 1 to 4, wherein the front ends of the plurality of unbonded steel strands are connected to a front end bearing assembly, the front end bearing assembly comprises a bearing plate and a guiding bracket assembly, the front ends of the plurality of unbonded steel strands are respectively fixedly connected to the bearing plate, and the guiding bracket assembly is fixedly connected to the bearing plate on the side of the bearing plate facing away from the unbonded steel strands.

10. The unbonded prestressed impermeable anchor cable of claim 9, wherein said guiding bracket assembly comprises a plurality of guiding brackets, said plurality of guiding brackets are uniformly connected to said bearing plate along the circumference of said bearing plate, and one ends of said plurality of guiding brackets away from said bearing plate are collectively connected to said fixing sleeve.