CN113529708A

CN113529708A - Pressure type unbonded prestress anti-seepage anti-floating anchor rod structure

Info

Publication number: CN113529708A
Application number: CN202110925804.2A
Authority: CN
Inventors: 金航华; 金国喜
Original assignee: Zhejiang Zhongqiao Pre Stress Equipment Co ltd
Current assignee: Zhejiang Zhongqiao Pre Stress Equipment Co ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-10-22

Abstract

The invention discloses a pressure type unbonded prestress anti-seepage anti-floating anchor rod structure, which comprises: a plurality of unbonded steel stranded wires are mutually parallel to form a wire harness, and an outer protective layer wraps the outside of each unbonded steel stranded wire; a plurality of steel strand central restraining rings are wound on the wire harness at intervals; the steel strand isolation brackets and the steel strand central restraining rings are arranged in the strand at intervals; the fixed end anchorage assembly is arranged at one end of the wire harness; the anchor assembly at the stretching and anchoring end is arranged at the other end of the wire harness; the water stop steel plate assembly is arranged on the wire harness close to the anchor assembly of the tensioning anchoring end; wherein, seepage-proofing structures for blocking and preventing the water seepage of the foundation are arranged in the fixed end anchorage assembly, the tensioning and anchoring end anchorage assembly and the water stop steel plate assembly. Therefore, the tensioning anchoring end, the fixed end and the water stop steel plate can be well blocked and prevented from upward seepage of the base water through the gap of the outer wall of the unbonded steel strand and the gap of the inner part of the wire diameter of the steel strand.

Description

Pressure type unbonded prestress anti-seepage anti-floating anchor rod structure

Technical Field

The invention relates to the field of pressure type prestressed anti-floating anchor rods, in particular to a pressure type unbonded prestressed anti-seepage anchor rod structure.

Background

With the fact that the world economy of the twenty-first century enters a high-speed development stage, particularly the development speed of the Chinese economy is more global leading, the national foundation construction is also improved in mechanism and technological innovation, the country draws the coming of the era of promoting the development of infrastructure, and the pressure type prestressed anti-floating anchor rod has established the important position in the field of building foundation engineering from the aspects of research, development, production, application and the like. The traditional anti-floating anchor rod is composed of a pressure type and a tension type, a base material adopts common deformed steel bar or finish-rolled deformed steel bar, and a steel strand is also adopted. Because the use standard of the prior anti-floating anchor rod is low, the corresponding defects are gradually exposed, such as: the shear fracture, dislocation, cracking, leakage and other safety accidents of the bearing beam of the building foundation caused by low anchoring pull-out resistance, poor anti-interference stability, weak anti-corrosion and anti-permeability performance and the like. Based on the technical requirements, the China departs from JGJ476-2019 'construction engineering anti-floating technical standard', wherein the design of the anchor rod provides corresponding requirements, and the technical requirements are made on the anti-pulling anchoring force, the length, the corrosion resistance and the impermeability of the anchoring anti-pulling force of different types of anti-floating anchor rods in different stratums.

Based on the huge demand of anti-floating anchor rod in the market, simultaneously belongs to the prestressing force technical category again, its main research and development content and key technology direction are as follows:

1. the anchoring withdrawal resistance and the anti-interference stability of the prestressed anchor rod anchoring body are improved: the anchor rod is characterized in that the most common and stable anchoring mode in the prestressed anchoring technology is adopted in the main structure design of the anchor rod, namely an extrusion sleeve is matched with an extrusion spring to be in a high-pressure extrusion occlusion mode, a rod body base material adopts UPS-15.2-1860-JG/T161-2016 unbonded steel stranded wires, and the anchoring performance of anchoring in an extrusion mode under the condition of not considering the concrete strength of a pile body meets the requirement of being more than or equal to 95% in GB/T14370-2015 and is far more than 2 times of the strength required by the anchor rod design. The non-adhesive steel strand is adopted, and under a stress structure, the anchoring anti-pulling force is large, the anti-interference stability is good, and meanwhile, the anti-corrosion problem of the bus is solved.

2. The problem of underground foundation water leakage through the anchor rod structure body or the crack of the joint of the concrete and the structure body is solved: the term 7.5.10 in the JGJ476-2019 standard has different requirements on the waterproof grade of the connecting part of the anchor rod and the underground basic structure, and three parts for forming leakage in the anchor rod structure:

1) the fixed end is the most important leakage point, because the outer protective layer (plastic sheath) of the steel strand needs to be removed at the extrusion meshing part of the extrusion sleeve and the steel strand, an exposed leakage point is formed at the end part, and underground water can seep from the twisted joint of the steel strand at the end part and the outer surface of the steel strand.

2) The second leak point is the junction of stock upper portion and building foundation position raft board or bottom plate, in the structural pattern promptly "stagnant water steel sheet position", the leak point of here mainly produces in the department that does not have bonding steel strand wires and pile body concrete, the mode of seepage is: the underground foundation water upwelles along the crack between the unbonded steel strand plastic outer sleeve and the concrete through corresponding water pressure.

3) The third seepage position is on the top of the anchor rod: the anchor backing plate is similar with the anchor position of ground tackle steel strand wires, and the top layer sheath need be got rid of because of the anchor needs equally to the outer plastic layer of unbonded steel strand wires similar, the anchor junction, consequently the leak source appears in this connecting portion.

In order to meet the requirement of the bolt anti-corrosion design in item 7.5.9 in the JGJ476-2019 standard, a design scheme of comprehensively considering leakage and corrosion resistance compatibility becomes a technical key when the bolt is initially designed and planned.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide a pressure type unbonded prestress anti-seepage anti-floating anchor rod structure which can well obstruct at a tensioning anchoring end, a fixed end and a water stop steel plate and prevent base water from permeating upwards through an outer wall gap of an unbonded steel strand and an inner gap formed by twisting the wire diameter of the steel strand.

In order to achieve the purpose, the invention provides a pressure type unbonded prestress anti-seepage anti-floating anchor rod structure which comprises a plurality of unbonded steel strands, a plurality of steel strand central restraining rings, a plurality of steel strand isolating supports, a fixed end anchor assembly, a tensioning and anchoring end anchor assembly and a water stop steel plate assembly, wherein the steel strands are fixedly connected with the fixed end anchor assembly; a plurality of unbonded steel stranded wires are mutually parallel to form a wire harness, and an outer protective layer wraps the outside of each unbonded steel stranded wire; a plurality of steel strand central restraining rings are wound on the wire harness at intervals; the steel strand isolation brackets and the steel strand central restraining rings are arranged in the strand at intervals; the fixed end anchorage assembly is arranged at one end of the wire harness; the anchor assembly at the stretching and anchoring end is arranged at the other end of the wire harness; the water stop steel plate assembly is arranged on the wire harness close to the anchor assembly of the tensioning anchoring end; wherein, seepage-proofing structures for blocking and preventing the water seepage of the foundation are arranged in the fixed end anchorage assembly, the tensioning and anchoring end anchorage assembly and the water stop steel plate assembly.

In a preferred embodiment, the fixed end anchor assembly comprises a bearing plate, a plurality of tapered gland sleeves, a plurality of squeeze sleeves/squeeze springs, and a locking nut/fixed platen; the bearing plate comprises a central taper hole, a plurality of edge taper holes, a central boss and a sealing groove; the plurality of side conical holes are uniformly arranged around the central conical hole in an encircling manner, the small ends of the side conical holes are arranged opposite to the small end of the central conical hole, and one ends of the plurality of unbonded steel stranded wires penetrate through the side conical holes; the central boss is arranged on one side of the bearing plate; the sealing groove is annularly arranged at the root part of the central boss; one part of the conical sealing sleeves is sleeved at one end of the plurality of unbonded steel stranded wires and embedded in the plurality of side conical holes; the plurality of extrusion sleeves/extrusion springs are sleeved on the exposed parts of the plurality of unbonded steel stranded wires after one ends of the plurality of unbonded steel stranded wires penetrate through the plurality of side taper holes; the fixed pressing plate comprises a center through hole and a plurality of side through holes which are matched with the position specifications of the conical center conical hole and the side conical holes, and the exposed part of one end of each of the plurality of unbonded steel stranded wires after penetrating through the extrusion sleeve/extrusion spring penetrates through the side through holes to enable the fixed pressing plate to be pressed on the extrusion sleeves/extrusion springs.

In a preferred embodiment, the fixed end anchor assembly further comprises a center grout tube, a locking nut/gasket, a fixed end seal ring, and a fixed end anchor seal cap; the two ends of the central grouting pipe are provided with external threads, one end of the central grouting pipe penetrates through the central through hole of the fixed pressing plate after penetrating through the large end of the central conical hole, and one of the plurality of conical sealing sleeves is sleeved in and embedded in the central conical hole from the other end of the central grouting pipe; the locking nut/gasket is locked at the other end of the central grouting pipe, and a conical sealing sleeve is pressed in the central conical hole; one locking nut of the locking nut/fixed pressing plate is locked at one end of the central grouting pipe, so that the fixed pressing plate presses the plurality of extrusion sleeves/extrusion springs and presses one part of the plurality of conical sealing sleeves in the plurality of side conical holes; the fixed end sealing ring is arranged in the sealing groove of the bearing plate; the fixed end anchorage device sealing cover is of a bowl-shaped structure, the center of the bottom of the bowl-shaped structure comprises a central hole, the central hole is sleeved on a part of one end of the central grouting pipe, which is exposed out of one locking nut of the locking nut/the fixed pressing plate, and the bowl opening of the bowl-shaped structure is sleeved on the central boss of the bearing plate and is pressed on the fixed end sealing ring; and the other locking nut of the locking nut/the fixed pressing plate is locked on the part of one end of the central grouting pipe, which is exposed out of the central hole of the fixed end anchor sealing cover, so that the fixed end anchor sealing cover is tightly pressed on the fixed end sealing ring.

In a preferred embodiment, the bearing plate further comprises a plurality of support mounting holes which are uniformly annularly arranged at the edge of the bearing plate, the plurality of support mounting holes are annularly arranged at the periphery of the plurality of side cone holes, the fixed end anchor assembly further comprises a guide support, and the guide support comprises a plurality of guide support rods, a guide support restraining ring and a plurality of extrusion pipes/extrusion springs; one end of each guide supporting rod is provided with an external thread; the other ends of the guide support rods are bent inwards by an angle and then are fixedly arranged in the guide frame restraint ring; the plurality of extrusion pipes/extrusion springs are sleeved at one end of the plurality of guide supporting rods; after the external threads at one end of the guide support rods penetrate through the support mounting holes of the bearing plate, the extrusion pipes/extrusion springs are attached to and pressed against the bearing plate through nut locking, and meanwhile the extrusion pipes/extrusion springs are locked at one end of the guide support rods.

In a preferred embodiment, the tensioned anchoring end anchor assembly comprises an anchor backing plate, water-swellable rubber, a working anchor ring, a working clamping piece and an anchor backing plate end anchor sealing cover; the anchor backing plate comprises a plate body and a plurality of supporting steel bars; the plate body is provided with a sealing hole; a plurality of supporting steel bars are vertically arranged around the periphery of the sealing hole together with the plate body; the water-swellable rubber is arranged in the sealing hole, the other ends of the plurality of unbonded steel strands penetrate through the water-swellable rubber, and the water-swellable rubber wraps the outer protective layers of the plurality of unbonded steel strands; the working anchor ring comprises a plurality of conical through holes, and the other ends of the plurality of unbonded steel strands penetrate through the water-swelling rubber and then penetrate through the small ends of the conical through holes; the working clamping pieces are of a pair of semicircular cone sleeve structures, annular thread teeth are arranged in the working clamping pieces, conicity matched with the conical through holes is formed in the outer portions of the working clamping pieces, the pair of semicircular cone sleeve structures of the working clamping pieces are buckled at the positions, where the outer protective layers are removed, of the other ends of the plurality of unbonded steel stranded wires, the working clamping pieces are embedded in the conical through holes, and the other ends of the plurality of unbonded steel stranded wires, the anchor backing plate, the working anchor ring and the working clamping pieces are fixedly connected together through the self-back tension of the unbonded steel stranded wires; the anchor backing plate end anchor sealing cover is of a bowl-shaped structure, the anchor backing plate end anchor sealing cover covers the other ends of the plurality of unbonded steel strands, the working anchor ring and the working clamping piece, and the bowl edge of the bowl-shaped structure of the anchor backing plate end anchor sealing cover is in sealing connection with the anchor backing plate.

In a preferred embodiment, the tensioned anchorage end anchor assembly further comprises an anchor backing plate end sealing gasket disposed between the anchor backing plate end anchor sealing cap and the anchor backing plate, the anchor backing plate end sealing gasket cooperating with the bolt and nut to form a sealing connection between the anchor backing plate end anchor sealing cap and the anchor backing plate.

In a preferred embodiment, the anchor pad end anchor seal cap and the anchor pad are welded together.

In a preferred embodiment, the water stop steel plate assembly comprises a water stop steel plate, a plurality of water stop plate end pressure sleeves, a water stop plate end sealing gasket and a water stop plate end locking nut; the water stop steel plate comprises a plate body and a plurality of elbow reinforcing steel bars; the plate body comprises a plurality of wire passing holes uniformly and annularly arranged around the center of the plate body, and a plurality of unbonded steel stranded wires penetrate through the plurality of wire passing holes; a plurality of elbow reinforcing steel bars and the plate body are vertically and uniformly arranged on the periphery of the plurality of wire passing holes in an annular mode; a plurality of water stop plate end pressure sleeves are sleeved on the plurality of unbonded steel stranded wires, and one end of each water stop plate end pressure sleeve is provided with an external thread; the sealing gasket at the end of each water stop plate is sleeved at the root of the external thread at one end of the end pressing sleeve of each water stop plate; wherein the external screw thread of sealing plate end pressure sleeve pipe one end has elbow reinforcing bar one side to penetrate and cross the line downthehole from the stagnant water steel sheet to seal up the sealing pad of sealing plate end to be in the sealing plate end and press between the step and the stagnant water steel sheet of sleeve pipe one end external screw thread root, sealing plate end lock nut is twisted on the external screw thread of sealing plate end pressure sleeve pipe one end from the opposite side of stagnant water steel sheet, makes the non-adhesive steel strand wires cross line hole department and sealing plate end pressure sleeve pipe, sealing plate end is sealed fills up and sealing plate end lock nut forms sealed fixed connection at the sealing plate.

In a preferred embodiment, the fixed end anchor assembly further comprises a protective media filled within the fixed end anchor seal housing.

In a preferred embodiment, the pressure type unbonded prestressed anti-seepage anti-floating anchor structure further comprises a spiral rib which is respectively wound outside the plurality of unbonded steel strands at the fixed end anchor assembly and the tensioned anchoring end anchor assembly.

Compared with the prior art, the pressure type unbonded prestress anti-seepage anti-floating anchor rod structure has the following beneficial effects: the scheme adopts an integral protection cover form and a structure form of conical sealing ring sealing at the fixed end, adopts a metal pressing pipe pressing and sealing form at the water stop plate part and adopts a sealing form of water swelling rubber and a sealing cover at the anchoring end, and the sealing forms can well separate and prevent the base water from permeating through the gap of the outer wall of the unbonded steel stranded wire and the inner gap of the wire diameter twisting of the steel stranded wire; the guide support is arranged on the bearing plate, so that the guide performance and the bearing capacity are improved, and the difficulty of installation and construction is reduced; the structural form of the designed fixed end can be assembled into a sectional bearing structural form at will, so that the application range of the design is wider; the structural form of the designed fixed end can adapt to the change of the number of the steel strands from 1 to N, and the application occasion is more comprehensive.

Drawings

Fig. 1 is a schematic structural view of an impermeable anchor structure according to an embodiment of the present invention;

FIG. 2 is a partially enlarged schematic view of a fixed end according to an embodiment of the present invention;

fig. 3 is a partially enlarged schematic view at a water stop steel plate according to an embodiment of the present invention;

FIG. 4 is a partially enlarged schematic view of a fixed end according to an embodiment of the present invention;

FIG. 5 is a schematic view of a fixed end carrier seal structure according to an embodiment of the invention;

FIG. 6 is an enlarged, fragmentary schematic view of a fixed end carrier seal structure according to an embodiment of the invention;

FIG. 7 is a schematic front view of a guide bracket according to an embodiment of the invention;

FIG. 8 is a side schematic view of a guide bracket according to an embodiment of the invention;

FIG. 9 is a schematic sectional front view of a carrier plate according to an embodiment of the present invention;

FIG. 10 is a schematic side view of a carrier plate according to an embodiment of the invention;

FIG. 11 is a schematic cross-sectional front view of a fixed end anchor seal cap according to an embodiment of the present invention;

FIG. 12 is a side view of a fixed end anchor seal cap according to an embodiment of the present invention;

FIG. 13 is a schematic front view of a locking nut/stationary platen according to one embodiment of the present invention;

FIG. 14 is a side cross-sectional schematic view of a locking nut/stationary platen according to an embodiment of the present invention;

FIG. 15 is a schematic front view of a fixed end gasket in accordance with an embodiment of the invention;

FIG. 16 is a side cross-sectional schematic view of a fixed end gasket in accordance with an embodiment of the present invention;

FIG. 17 is a schematic cross-sectional front view of a fixed end anchor squeeze sleeve according to an embodiment of the present invention;

FIG. 18 is a side view of a fixed end anchor squeeze sleeve according to an embodiment of the present invention;

FIG. 19 is a schematic front view of a fixed end anchor compression spring according to an embodiment of the present invention;

FIG. 20 is a side schematic view of a fixed end anchor compression spring according to an embodiment of the present invention;

FIG. 21 is a schematic front view of a center slip pipe according to an embodiment of the present invention;

FIG. 22 is a schematic side view of a center grout tube according to an embodiment of the present invention;

figure 23 is a schematic cross-sectional front view of a conical sealing sleeve according to an embodiment of the invention;

FIG. 24 is a side schematic view of a tapered gland according to an embodiment of the present invention;

FIG. 25 is a schematic structural view of a straight ribbed spiral rib according to an embodiment of the present invention;

FIG. 26 is a schematic front view of a steel strand isolation bracket according to an embodiment of the present invention;

FIG. 27 is a side view schematic of a steel strand isolation bracket according to an embodiment of the present invention;

FIG. 28 is a schematic structural view of a fixed end assembly according to an embodiment of the present invention;

FIG. 29 is a schematic front view of an anchor pad according to an embodiment of the present invention;

FIG. 30 is a schematic front view of an anchor pad according to an embodiment of the present invention;

FIG. 31 is a schematic front view of a work anchor ring according to one embodiment of the present invention;

FIG. 32 is a schematic front view of a work anchor ring according to an embodiment of the present invention;

FIG. 33 is a schematic front view of a work clip according to an embodiment of the present invention;

FIG. 34 is a schematic front view of a work clip according to an embodiment of the invention;

fig. 35 is a front view schematically illustrating a water stop steel plate according to an embodiment of the present invention;

fig. 36 is a schematic side view of a water stop steel plate according to an embodiment of the present invention;

fig. 37 is a schematic view of a sealing structure at a water stop steel plate according to an embodiment of the present invention;

FIG. 38 is an enlarged partial schematic view at IV of FIG. 37;

FIG. 39 is a schematic front view of a waterstop end lock nut according to an embodiment of the invention;

FIG. 40 is a side cross-sectional schematic view of a waterstop end lock nut according to an embodiment of the invention;

FIG. 41 is a schematic front view of a water stop plate end gasket according to an embodiment of the invention;

FIG. 42 is a side cross-sectional schematic view of a water stop end gasket according to an embodiment of the invention;

FIG. 43 is a schematic cross-sectional front view of a waterstop end compression sleeve according to an embodiment of the invention;

FIG. 44 is a schematic side view of a waterstop end clamp sleeve according to an embodiment of the invention;

FIG. 45 is a schematic view of an installation at a steel strand isolation bracket according to an embodiment of the present invention;

FIG. 46 is a schematic structural view of a segmented impermeable anti-floating anchor according to an embodiment of the invention;

FIG. 47 is an enlarged partial view at I of FIG. 45;

FIG. 48 is an enlarged partial schematic view at II of FIG. 45;

FIG. 49 is an enlarged partial schematic view at III of FIG. 45;

FIG. 50 is a schematic view of the installation of the third stage load floor according to one embodiment of the present invention;

FIG. 51 is a schematic view of the installation of the second stage carrier plate according to one embodiment of the present invention.

Description of the main reference numerals:

1-guide frame restraint ring, 2-guide support, 201-guide support rod, 3-center grouting pipe, 4-fixed end anchorage sealing cover, 401-fixed end sealing ring, 402-center hole, 5-protective medium, 6-extrusion sleeve/extrusion spring, 7-extrusion pipe/extrusion spring, 8-bearing plate, 801-center taper hole, 802-side taper hole, 803-support mounting hole, 804-center boss, 805-sealing groove, 9-nut, 10-unbonded steel strand, 11-locking nut/fixed pressure plate, 12-fixed end sealing gasket, 13-tapered sealing sleeve, 14-locking nut/gasket, 15-straight rib spiral rib, 16-steel strand center restraint ring, 17-steel strand isolation support, 18-water stop steel plate, 1801-elbow steel bar, 1802-water stop plate end isolation support, 1803-wire through hole, 19-water stop plate end pressure sleeve, 20-water stop plate end sealing gasket, 21-water stop plate end locking nut, 22-water swelling rubber, 23-anchor backing plate, 2301-support steel bar, 2302-anchor backing plate end spiral rib, 2303-plate body, 2304-sealing hole, 24-anchor backing plate end sealing gasket, 25-tensioning anchor, 26-working anchor ring, 2601-tapered through hole, 27-working clamping piece, 2701-annular thread tooth, 28-anchor backing plate end anchor sealing cover, 29-sealing cover end cover and 30-sealing medium.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1 to 4, a pressure type unbonded prestressed anti-seepage anti-floating anchor structure according to a preferred embodiment of the present invention comprises a plurality of unbonded steel strands 10, a plurality of steel strand central restraining rings 16, a plurality of steel strand isolation brackets 17, a fixed end anchor assembly, a tension anchoring end anchor assembly and a water stop steel plate assembly. A plurality of unbonded steel strands 10 are parallel to each other to form a wire bundle, and an outer protective layer wraps the outside of each unbonded steel strand 10. A plurality of steel strand central constraining rings 16 are wound around the wire bundle at intervals. The plurality of steel strand isolation brackets 17 are arranged in the wire bundle at intervals from the plurality of steel strand central restraining rings 16. The fixed end anchor assembly is disposed at one end of the wire harness. And the anchor assembly at the stretching and anchoring end is arranged at the other end of the wire harness. The water stop steel plate assembly is arranged on the position, close to the anchor assembly of the tensioning and anchoring end, of the wire harness. Wherein, seepage-proofing structures for blocking and preventing the water seepage of the foundation are arranged in the fixed end anchorage assembly, the tensioning and anchoring end anchorage assembly and the water stop steel plate assembly.

As shown in fig. 5-25, in some embodiments, the fixed end anchor assembly includes a bearing plate 8, a plurality of tapered sealing sleeves 13, a plurality of compression sleeves/compression springs 6, and a locking nut/fixed platen 11.

Referring to fig. 9 and 10, fig. 23 and 24, in some embodiments, the bearing plate 8 includes a central tapered hole 801, a plurality of side tapered holes 802, a central boss 804 and a sealing groove 805. The plurality of side taper holes 802 are uniformly arranged around the central taper hole 801 in an encircling manner, the small ends of the plurality of side taper holes 802 are arranged opposite to the small end of the central taper hole 801, and one end of the plurality of unbonded steel strands 10 penetrates through the plurality of side taper holes 802. In the present embodiment, the taper of the central taper hole 801 and the side taper hole 802 is 14 °, and the depth of the central taper hole 801 and the side taper hole 802 is preferably at least 2mm of the large end of the tapered sealing sleeve 13 exposed outside. The number of the tapered holes 802 is six in the embodiment, but the invention is not limited thereto. The central boss 804 is disposed on one side of the carrier plate 8, and the diameter of the central boss 804 of this embodiment is

A sealing groove 805 is provided around the root of the central boss 804. One part of the conical sealing sleeves 13 is sleeved at one end of the plurality of unbonded steel stranded wires 10, and the conical sealing sleeves 13 are embedded in the plurality of side conical holes 802.

Referring to fig. 13 and 20, in some embodiments, a plurality of compression sleeves/springs 6 are disposed around the exposed portion of the plurality of unbonded steel strands 10 after one end thereof passes through the plurality of tapered holes 802. The fixed pressing plate comprises a center through hole and a plurality of side through holes which are matched with the position specifications of the conical center conical hole and the side conical holes 802, and the exposed parts of one ends of the plurality of unbonded steel stranded wires 10 after penetrating through the extrusion sleeves/extrusion springs 6 penetrate through the side through holes to enable the fixed pressing plate to be pressed on the extrusion sleeves/extrusion springs 6.

Referring to fig. 11, 12, 21, 22, in some embodiments, the fixed end anchor assembly further comprises a center grout tube 3, a locking nut/washer 14, a fixed end seal ring 401, and a fixed end anchor seal cap 4. Both ends of the central grouting pipe 3 are provided with external threads, one end of the central grouting pipe 3 penetrates through the central through hole of the fixed pressure plate after penetrating through the large end of the central conical hole 801, and one of the plurality of conical sealing sleeves 13 is sleeved in and embedded in the central conical hole 801 from the other end of the central grouting pipe 3. A locking nut/washer 14 locks onto the other end of the central slip pipe 3 and presses a conical gland 13 into the central bore 801. Wherein one locking nut of the locking nut/stationary platen 11 is locked at one end of the central injection pipe 3, so that the stationary platen compresses the plurality of pressing sleeves/pressing springs 6 and compresses a portion of the plurality of tapered sealing sleeves 13 within the plurality of side tapered holes 802. The fixed end sealing ring 401 is disposed in the sealing groove 805 of the bearing plate 8, and the fixed end sealing ring 401 of this embodiment is an O-ring, but the invention is not limited thereto. Wherein the extrusion spring in the extrusion cover/extrusion spring 6 of this application adopts the high rigidity pressure spring, and the extrusion spring is extruded into the disintegrating slag under the pressure effect, and the disintegrating slag is full of between the extrusion cover and the unbonded steel strand wires 10 of getting rid of the outer protective layer, makes extrusion cover/extrusion spring 6 and the unbonded steel strand wires 10 of getting rid of the outer protective layer firmly link together.

In some embodiments, the stationary end anchor seal cap 4 is a bowl-shaped structure, the bottom center of the bowl-shaped structure includes a central hole 402, the central hole 402 is sleeved on a portion of the central grouting pipe 3, which is exposed from one locking nut of the locking nut/stationary platen 11, and the bowl mouth of the bowl-shaped structure is sleeved on the central boss 804 of the loading plate 8 and pressed on the stationary end seal ring 401. Wherein the other locking nut of the locking nut/fixing pressure plate 11 is locked on the part of one end of the central grouting pipe 3 exposed out of the central hole 402 of the fixed end anchor sealing cover 4, so that the fixed end anchor sealing cover 4 is pressed on the fixed end sealing ring 401. The conical sealing sleeve 13, the fixed end sealing ring 401 and the fixed end anchor sealing cover 4 are matched together to form a sealing structure of a tensioning anchoring end, so that the upward seepage of the base water through the gap of the outer wall of the unbonded steel strand 10 and the inner gap of the wire diameter stranded steel strand can be effectively prevented. Additionally, the anchor seal cap 4 may be filled with a protective medium 5 (such as, but not limited to, grease, etc.) for corrosion protection of the components therein.

Referring to fig. 7 to 10, in some embodiments, the bearing plate 8 further includes a plurality of bracket mounting holes 803 uniformly formed around the edge of the bearing plate 8, the plurality of bracket mounting holes 803 are formed around the periphery of the plurality of side cone holes 802, the fixed end anchor assembly further includes a guide bracket 2, and the guide bracket 2 includes a plurality of guide struts 201, a guide bracket restraining ring 1, and a plurality of pressing tubes/pressing springs 7. One end of each guide strut 201 is provided with an external thread. The other ends of the guide support rods 201 are bent inwards by an angle and then are fixedly arranged in the guide frame restraint ring 1. A plurality of pressing tubes/pressing springs 7 are fitted around one end of the plurality of guide support rods 201. After the external threads at one end of the guide support rods 201 penetrate through the support mounting holes 803 of the bearing plate 8, the extrusion tubes/extrusion springs 7 are tightly attached to the bearing plate 8 through nut locking, and the extrusion tubes/extrusion springs 7 are locked at one end of the guide support rods 201.

As shown in fig. 45 and also shown in fig. 26 to 27, in some embodiments, the steel strand isolation bracket 17 has a disc-shaped structure, a plurality of central wire passing holes, generally 1 to 3, are formed in the center of the steel strand isolation bracket 17, and the central wire passing holes are used for the unbonded steel strands 10 to pass through or a grouting pipe to pass through. A plurality of concave arc-shaped notches are uniformly arranged on the outer circumference of the steel strand isolation bracket 17 and are mainly used for restraining a plurality of unbonded steel strands 10. The number of the concave arc-shaped notches is six in the embodiment, but the invention is not limited thereto. The steel strand central restraining ring 16 is generally arranged at an interval from the steel strand isolation support 17, and mainly functions to control the compactness of the strand and prevent the steel strand isolation support 17 from being separated from the plurality of unbonded steel strands 10 and the like. The steel strand central confinement rings 16 may generally be replaced with lead wires.

As shown in fig. 28-34, in some embodiments, the tensioned anchor end anchor assembly generally includes an anchor pad 23, water-swellable rubber 22, a working anchor ring 26, a working clip 27, an anchor pad end anchor seal cap 28, and a seal cap end cap 29, among others.

Referring to fig. 29-30, in some embodiments, anchor pad 23 includes a plate 2303 and a plurality of support bars 2301. Plate 2303 has a sealing aperture 2304. A plurality of support bars 2301 are vertically arranged around the periphery of the sealing hole 2304 with the plate body 2303. Water-swellable rubber 22 is disposed in sealing hole 2304, the other ends of the plurality of unbonded steel strands 10 pass through water-swellable rubber 22, and water-swellable rubber 22 wraps the outer protective layers of the plurality of unbonded steel strands 10.

Referring to fig. 31-32, in some embodiments, the working anchor ring 26 includes a plurality of tapered through holes 2601, and the other ends of the plurality of unbonded steel strands 10 are inserted through the water-swellable rubber 22 and then inserted through the small ends of the plurality of tapered through holes 2601.

Referring to fig. 33 to 34, in some embodiments, the working clip 27 is in a pair of half-cone sleeve structures, the working clip 27 is provided with an annular thread 2701 inside, and the outside has a taper matched with the tapered through hole 2601, the pair of half-cone sleeve structures of the working clip 27 is fastened to the other ends of the plurality of unbonded steel strands 10 to remove the outer protection layer, and the working clip 27 is embedded in the tapered through hole 2601 to fixedly connect the other ends of the plurality of unbonded steel strands 10, the anchor backing plate 23, the working anchor ring 26 and the working clip 27 together by the self-tension of the unbonded steel strands 10.

Referring to fig. 28, in some embodiments, the anchor pad end anchor seal cover 28 is a bowl-shaped structure, the anchor pad end anchor seal cover 28 covers the other ends of the plurality of unbonded steel strands 10, the working anchor ring 26 and the working clamping pieces 27, and the bowl edge of the bowl-shaped structure of the anchor pad end anchor seal cover 28 is sealingly connected to the anchor pad 23. The anchor backing end anchor sealing cover 28 can also be provided with a sealing cover end cover 29 independently, the sealing cover end cover 29 has the main function of well connecting the anchor backing end anchor sealing cover 28 and the sealing cover end cover 29 after the anchor backing end anchor assembly to be tensioned is well installed and connected and sealing media are filled, and the sealing connection mode is not limited specifically.

In some embodiments, the tensioned anchoring end anchor assembly further includes an anchor pad end seal 24 disposed between the anchor pad end anchor seal housing 28 and the anchor pad 23, the anchor pad end seal 24 cooperating with the bolt and nut to form a sealed connection between the anchor pad end anchor seal housing 28 and the anchor pad 23. The anchor pad end anchor seal cover 28 and anchor pad 23 may also be welded together. The anchor pad end anchor seal cap 28 may also be generally filled with a sealing medium, which may be a grease-like anti-corrosive medium.

As shown in fig. 35 to 44, in some embodiments, the waterstop steel plate assembly includes a waterstop steel plate 18, a plurality of waterstop end pressure sleeves 19, a waterstop end gasket 20, and a waterstop end lock nut 21. The water stop steel plate 18 includes a plate body and a plurality of bent steel bars 1801. The plate body includes that the even ring locates a plurality of line holes 1803 around the plate body center, and a plurality of unbonded steel strand wires 10 pass from a plurality of line holes 1803. A plurality of elbow reinforcing steel bars 1801 and the plate body are uniformly and annularly arranged on the periphery of the plurality of wire passing holes 1803 vertically. Referring to fig. 37 and 38, a plurality of water stop plate end pressure sleeves 19 are sleeved on the plurality of unbonded steel stranded wires 10, and one end of each water stop plate end pressure sleeve 19 is provided with an external thread. The sealing gasket 20 is sleeved on the root of the external thread at one end of each sealing plate end pressure sleeve 19. Wherein the external screw thread of the water stop plate end pressure sleeve 19 one end penetrates into the line passing hole 1803 from the water stop steel plate 18 with the elbow reinforcement 1801 side, and the water stop plate end sealing gasket 20 is arranged between the step of the water stop plate end pressure sleeve 19 one end external screw thread root and the water stop steel plate 18, the water stop plate end locking nut 21 is screwed on the external screw thread of the water stop plate end pressure sleeve 19 one end from the other side of the water stop steel plate 18, so that the unbonded steel stranded wire 10 forms a sealing fixed connection with the water stop plate end pressure sleeve 19, the water stop plate end sealing gasket 20 and the water stop plate end locking nut 21 at the line passing hole 1803 of the water stop steel plate 18.

In some embodiments, the pressure-type unbonded prestressed impermeable anti-floating anchor structure further comprises a ribbed spiral rib 15 or an anchor mat end spiral rib 2302 wound around the plurality of unbonded steel strands 10 at the fixed end anchor assembly and the tensioned anchored end anchor assembly, respectively. The straight ribbed spiral bar 15 or the anchor backing end spiral bar 2302, the elbow reinforcement 1801 and the support reinforcement 2301 may be used to reinforce the connection and support with the concrete.

As shown in fig. 46 to 51, in some embodiments, the pressure-type unbonded prestressed impermeable anti-floating anchor structure of the present invention may also be applied in a segmented manner. Referring to fig. 46, a second fixed end assembly and a third bearing assembly may be added between the fixed end anchor assembly and the water stop steel plate 18 assembly. The waterproof structure and the linking structure of the second fixed end component and the third bearing component are similar to those of the fixed end anchor component, and the differences are that the number and the positions of unbonded steel stranded wires 10 (in transition) penetrating through the bearing plate 8 at the second fixed end component and the third bearing component are slightly different, and the positions of transition grouting pipes are different.

Referring to fig. 47, in some embodiments, the pressure type unbonded prestressed anti-seepage anti-floating anchor rod structure of the present invention is schematically illustrated in a connection structure with other anchoring materials such as cement mortar in an actual construction structure.

In some embodiments, although the present embodiment is described by way of example with unbonded steel strands, the watertight steel sheet impermeable structure of the present invention is also applicable to the use of, for example, but not limited to, slow-bonding steel strands.

In conclusion, the pressure type unbonded prestress anti-seepage anti-floating anchor rod structure disclosed by the invention has the following advantages: the scheme adopts an integral protection cover form and a structure form of conical sealing ring sealing at the fixed end, adopts a metal pressing pipe pressing and sealing form at the water stop plate part and adopts a sealing form of water swelling rubber and a sealing cover at the anchoring end, and the sealing forms can well separate and prevent the base water from permeating through the gap of the outer wall of the unbonded steel stranded wire and the inner gap of the wire diameter twisting of the steel stranded wire; the guide support is arranged on the bearing plate, so that the guide performance and the bearing capacity are improved, and the difficulty of installation and construction is reduced; the structural form of the designed fixed end can be assembled into a sectional bearing structural form at will, so that the application range of the design is wider; the structural form of the designed fixed end can adapt to the change of the number of the steel strands from 1 to N, and the application occasion is more comprehensive.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The utility model provides a pressure type prestressing force prevention of seepage anti-floating anchor rod structure that does not have bonding which characterized in that includes:

the non-adhesive steel stranded wires are parallel to each other to form a wire harness, and an outer protective layer wraps the outer surface of each non-adhesive steel stranded wire;

a plurality of steel strand central restraining rings which are wound on the wire harness at intervals;

a plurality of steel strand isolation brackets disposed in the bundle spaced from the plurality of steel strand central confinement rings;

a fixed end anchor assembly disposed at one end of the wire harness;

a tension anchorage end anchorage assembly provided at the other end of the wire harness; and

the water stop steel plate assembly is arranged on the wire harness close to the tensioning and anchoring end anchorage assembly;

the fixed end anchorage assembly, the tensioning and anchoring end anchorage assembly and the water stop steel plate assembly are internally provided with seepage-proofing structures for blocking and preventing water seepage of the foundation.

2. The pressure-type unbonded prestressed impermeable anti-floating anchor structure of claim 1, wherein said fixed end anchor assembly comprises:

a carrier plate, comprising:

a central taper hole;

the edge taper holes are uniformly arranged around the central taper hole in an encircling manner, the small ends of the edge taper holes are arranged opposite to the small end of the central taper hole, and one ends of the unbonded steel strands are arranged in the edge taper holes in a penetrating manner;

the central boss is arranged on one side of the bearing plate; and

the sealing groove is annularly arranged at the root part of the central boss;

a plurality of conical sealing sleeves, wherein one part of the conical sealing sleeves are sleeved at one ends of the plurality of unbonded steel stranded wires and embedded in the plurality of side conical holes;

the extrusion sleeves/extrusion springs are sleeved on the exposed parts of the plurality of unbonded steel stranded wires after one ends of the plurality of unbonded steel stranded wires penetrate through the plurality of side taper holes; and

locking female/fixed pressing plate, fixed pressing plate include with the center of cone taper hole with a plurality of limit taper hole position specification assorted central through-hole and a plurality of limit through-hole, the one end of many unbonded steel strand wires is passed the part that exposes behind the extrusion cover/extrusion spring passes a plurality of limit through-holes make fixed pressing plate presses and establishes on a plurality of extrusion cover/extrusion springs.

3. The pressure unbonded prestressed impermeable anti-floating anchor structure of claim 2, wherein said fixed end anchor assembly further comprises:

the two ends of the central grouting pipe are provided with external threads, one end of the central grouting pipe penetrates through the central through hole of the fixed pressing plate after penetrating through the large end of the central conical hole, and one of the plurality of conical sealing sleeves is sleeved in and embedded in the central conical hole from the other end of the central grouting pipe;

the locking nut/gasket is locked at the other end of the central grouting pipe, and presses one conical sealing sleeve in the central conical hole;

wherein one of said locking nuts of said locking nut/stationary platen is locked at one end of said central injection pipe, causing said stationary platen to compress said plurality of compression sleeves/compression springs and said portion of said plurality of tapered gland sleeves within said plurality of side cone holes;

the fixed end sealing ring is arranged in the sealing groove of the bearing plate; and

the fixed end anchorage device sealing cover is of a bowl-shaped structure, the center of the bottom of the bowl-shaped structure comprises a central hole, the central hole is sleeved on a part, exposed out of one locking nut of the locking nut/fixing pressing plate, of one end of the central grouting pipe, and a bowl opening of the bowl-shaped structure is sleeved on the central boss of the bearing plate and is pressed on the fixed end sealing ring;

the other locking nut of the locking nut/fixed pressing plate is locked on the part, exposed out of the central hole, of one end of the central grouting pipe, of the fixed end anchor sealing cover, so that the fixed end anchor sealing cover is tightly pressed on the fixed end sealing ring.

4. The pressure unbonded prestressed impermeable anti-floating anchor structure of claim 2, wherein said carrier plate further comprises a plurality of bracket mounting holes uniformly circumferentially disposed at an edge of said carrier plate and circumferentially disposed about a periphery of said plurality of side cone holes, said fixed end anchor assembly further comprising:

a guide bracket, comprising:

the guide support rods are arranged on the outer side of the base, and one end of each guide support rod is provided with an external thread; and

the other ends of the guide support rods are bent inwards by an angle and then are fixedly arranged in the guide frame restraining ring; and

a plurality of pressing tubes/pressing springs which are sleeved at one end of the plurality of guide supporting rods;

after the external threads at one end of the guide support rods penetrate through the support mounting holes of the bearing plate, the extrusion pipes/extrusion springs are attached to and pressed against the bearing plate through nut locking, and meanwhile the extrusion pipes/extrusion springs are locked at one end of the guide support rods.

5. The pressure type unbonded prestressed impermeable anti-floating anchor structure of claim 1, wherein said tensioned anchorage end anchor assembly comprises:

an anchor backing plate, comprising:

a plate body having a sealing hole; and

a plurality of support steel bars which are vertically arranged around the periphery of the sealing hole;

the water-swelling rubber is arranged in the sealing hole, the other ends of the plurality of unbonded steel strands penetrate through the water-swelling rubber, and the water-swelling rubber wraps the outer protective layers of the plurality of unbonded steel strands;

the working anchor ring comprises a plurality of conical through holes, and the other ends of the plurality of unbonded steel strands penetrate through the water-swelling rubber and then penetrate through the small ends of the plurality of conical through holes;

the working clamping piece is of a pair of semicircular cone sleeve structures, annular thread teeth are arranged in the working clamping piece, the outer part of the working clamping piece is provided with a taper matched with the tapered through hole, the pair of semicircular cone sleeve structures of the working clamping piece are buckled at the other ends of the plurality of unbonded steel stranded wires to remove the outer protection layer, meanwhile, the working clamping piece is embedded in the tapered through hole, and the other ends of the plurality of unbonded steel stranded wires, the anchor backing plate, the working anchor ring and the working clamping piece are fixedly connected together through the self-return tension of the unbonded steel stranded wires; and

the anchor backing plate end anchor sealing cover is of a bowl-shaped structure, the other ends of the plurality of unbonded steel strands, the working anchor ring and the working clamping piece are covered by the anchor backing plate end anchor sealing cover, and the bowl edge of the bowl-shaped structure of the anchor backing plate end anchor sealing cover is in sealing connection with the anchor backing plate.

6. The pressure unbonded prestressed impermeable anti-floating anchor rod structure of claim 5, wherein said tensioned anchorage end anchor assembly further comprises an anchor pad end seal disposed between said anchor pad end anchor seal housing and said anchor pad, said anchor pad end seal cooperating with a bolt and nut to form a sealed connection between said anchor pad end anchor seal housing and said anchor pad.

7. The pressure unbonded prestressed impermeable anti-floating anchor rod structure of claim 5, wherein the anchor pad end anchor sealing cover and the anchor pad are welded.

8. The pressure type unbonded prestressed impermeable anti-floating anchor rod structure of claim 1, wherein the water stop steel plate component comprises:

stagnant water steel sheet, it includes:

the plate body comprises a plurality of wire passing holes uniformly arranged around the center of the plate body in a surrounding manner, and the plurality of unbonded steel stranded wires penetrate through the plurality of wire passing holes; and

the elbow reinforcing steel bars are uniformly arranged on the peripheries of the wire passing holes in a surrounding manner and are vertical to the plate body;

the water stop plate end pressure sleeves are sleeved on the plurality of unbonded steel stranded wires, and one end of each water stop plate end pressure sleeve is provided with an external thread;

the sealing gasket at the end of the water stop plate is sleeved at the root of the external thread at one end of each water stop plate end pressure sleeve; and

a nut is locked at the end of the water stop plate;

wherein the external screw thread of sealing-up plate end pressure sleeve pipe one end is followed the stagnant water steel sheet has elbow reinforcing bar one side penetrates cross downthehole, and will sealing-up plate end is sealed to be in as for the step of sealing-up plate end pressure sleeve pipe one end external screw thread root with between the stagnant water steel sheet, sealing-up plate end lock nut follows the opposite side of stagnant water steel sheet is twisted on the external screw thread of sealing-up plate end pressure sleeve pipe one end, makes no bonding steel strand wires are in sealing-up plate cross line hole department with sealing-up plate end pressure sleeve pipe sealing-up plate end seal pad and sealing-up plate end lock nut forms sealed fixed connection.

9. The pressure unbonded prestressed impermeable anti-floating anchor rod structure of claim 3, wherein said fixed end anchor assembly further comprises a protective medium filled in said fixed end anchor seal cap.

10. The pressure-type unbonded prestressed impermeable anti-floating anchor structure of claim 1, further comprising a helical rib wrapped around said plurality of unbonded steel strands at said fixed end anchor assembly and said tensioned anchorage end anchor assembly, respectively.