CN109723915B - PCCP (prestressed concrete cylinder pipe) prestress reinforcing structure and reinforcing method - Google Patents
PCCP (prestressed concrete cylinder pipe) prestress reinforcing structure and reinforcing method Download PDFInfo
- Publication number
- CN109723915B CN109723915B CN201711342686.2A CN201711342686A CN109723915B CN 109723915 B CN109723915 B CN 109723915B CN 201711342686 A CN201711342686 A CN 201711342686A CN 109723915 B CN109723915 B CN 109723915B
- Authority
- CN
- China
- Prior art keywords
- hole
- pipeline
- pccp
- port
- anchor plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 title description 22
- 239000011513 prestressed concrete Substances 0.000 title description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 89
- 239000010959 steel Substances 0.000 claims abstract description 89
- 238000004873 anchoring Methods 0.000 claims abstract description 50
- 230000002787 reinforcement Effects 0.000 claims abstract description 30
- 125000006850 spacer group Chemical group 0.000 claims description 31
- 230000000149 penetrating effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 12
- 238000009434 installation Methods 0.000 description 9
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 8
- 239000004917 carbon fiber Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 210000002435 tendon Anatomy 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The application relates to the field of pipeline construction and discloses a PCCP pipeline prestress reinforcement structure and a reinforcement method, wherein the PCCP pipeline prestress reinforcement structure comprises a pipeline (1), a steel beam (2) wound on the periphery of the pipeline, a backing plate (3) arranged on the pipeline and an anchoring part arranged on the backing plate, the anchoring part is provided with a first side surface and a second side surface which are sequentially distributed along the circumferential direction of the pipeline, a bottom groove (13), a first through hole (11) and a second through hole (12) are formed in the anchoring part, the steel beam comprises a first part, a second part and a third part which are sequentially connected, the first part penetrates through the first through hole from the first side surface and winds the pipeline, the second part penetrates through the bottom groove from the first side surface and winds the pipeline, and the third part penetrates through the second through hole from the first side surface. The application leads the steel bundles to extend along the direction of the through holes of the anchoring part so as to alleviate the contact between the steel bundles and the edges of the end surfaces of the first through holes and the second through holes, and avoid the damage and the stress concentration of the steel bundles in the tensioning process.
Description
Technical Field
The invention relates to the field of pipeline construction, in particular to a PCCP pipeline prestress reinforcing structure and a reinforcing method.
Background
The prestressed steel cylinder concrete pipeline (PRESTRESSED CONCRETE CYLINDER PIPE, hereinafter referred to as PCCP pipeline) is a composite structure pipeline composed of pipe core concrete, high-strength prestressed steel wires and mortar protection layers, and compared with the traditional pipeline, the PCCP pipeline has the advantages of strong bearing capacity, strong water-passing capacity, basically no water leakage, difficult corrosion, convenience and rapidness in installation, good adaptability to the foundation, strong shock resistance and the like. The PCCP pipe is used as a pressurized water pipe and mainly bears the pressurized internal water load besides the earthing load, the transport load and the temporary pile load. When the PCCP pipeline prestressed steel wire breaks, in order to ensure the safe operation of the pipeline, the pipeline structure is reinforced, and the high internal water pressure can be born, which is the key of the safety and stability of the pipeline structure, so that the external prestress reinforcement method is the most effective reinforcement technology.
The conventional prestress reinforcement method comprises the following steps: the prestress steel ring reinforcing method, the prestress carbon fiber plate reinforcing method and the prestress steel beam reinforcing method are analyzed one by one:
For the prestress steel ring reinforcing method, the prestress steel ring is applied to the PCCP wire-cutting pipe, the method is convenient to construct and operate, but the applied prestress is limited, and the structural safety requirement of the PCCP wire-cutting pipe under the high internal water pressure condition is difficult to meet.
For the prestress carbon fiber plate reinforcing method, the prestress carbon fiber plate system consists of a carbon fiber plate, a fixed end anchor, a fixed end support, a tension end anchor, a tension end support, a tension end tool and a carbon fiber plate pressing strip, other components except the carbon fiber plate are fixed by bolts, a mortar protection layer and a tube core concrete cannot be perforated for fixing the bolts based on PCCP pipeline structural characteristics, the prestress carbon fiber plate is difficult to paste on the surface of the mortar layer, and the prestress carbon fiber plate is not suitable for the external prestress reinforcing of a PCCP broken wire tube.
For the prestress steel strand reinforcing method, the prestress steel strand has good flexibility, the steel strand is formed to be convenient to wind on a round tube, and the anchor device has small size and is convenient to install. In particular, the outer surface of the PCCP is provided with a rough mortar protection layer, and the steel strand is convenient to install on the mortar protection layer and has good feasibility. The prior prestress steel beam reinforcing structure is commonly used for reinforcing large-scale buildings such as coal bins, cement bins, sewage treatment tanks, nuclear power containment vessels and the like.
Although the prestress steel strand reinforcement method is theoretically suitable for the reinforcement of PCCP pipelines, there are many problems in implementation, and particularly, if an annular unbonded prestress steel strand reinforcement structure commonly used in a large building is used, an anchoring effect is not ideal, because the following aspects are mainly included: firstly, a Zhang Lacao and a buttress post are not arranged in the structure of the PCCP pipeline for installing an anchor, the anchor is required to be directly installed on a curved surface of the structure, the installation mode can lead the steel bundles to contact with the edges of the end faces of the anchor, and the damage and stress concentration can occur in the tensioning process; secondly, the steel bundles directly stretch-draw the operation after encircling the PCCP pipeline outer wall, only the concrete protection layer is poured after the prestress construction is completed, and the steel bundles are free of concrete constraint in the stretch-draw process, so that relative displacement with the components is easy to occur, and the structure external prestress reinforcing effect is affected. Therefore, it can be said that the existing prestressed steel strand reinforcement structure and installation technology for PCCP pipe reinforcement is still blank.
Disclosure of Invention
The invention aims to solve the problem that the effect of reinforcing a PCCP pipeline by using a prestress steel beam reinforcing method is not ideal in the prior art, and provides a PCCP pipeline prestress reinforcing structure which can effectively improve the reinforcing effect.
In order to achieve the above object, according to one aspect of the present invention, there is provided a PCCP pipe pre-stress reinforcement structure including a pipe, a steel bundle wound around an outer circumference of the pipe, a pad provided on the pipe, and an anchor portion provided on the pad, the anchor portion having a first side surface and a second side surface sequentially distributed along a circumferential direction of the pipe, the anchor portion being provided with a bottom groove, a first through hole, and a second through hole, the first through hole and the second through hole each penetrating the first side surface and the second side surface, the bottom groove being formed at a bottom of the anchor portion to form a cavity between the anchor portion and the pad, the bottom groove extending from the first side surface to the second side surface, wherein the steel bundle includes a first portion, a second portion, and a third portion sequentially connected, the first portion passing through the first through hole and winding the pipe, the second portion passing through the bottom groove from the first side surface and winding the pipe, the third portion passing through the second through hole.
Preferably, the first through hole and the second through hole are both straight holes, the position of the port of the first through hole located on the first side is higher than the position of the port of the first through hole located on the second side, and the position of the port of the second through hole located on the second side is higher than the position of the port of the second through hole located on the first side.
Preferably, the anchoring portion includes a first anchor plate, a second anchor plate and a spacer, the first anchor plate and the second anchor plate are respectively disposed on a first surface and a second surface of the spacer to define the first side surface and the second side surface, a first spacer through hole and a second spacer through hole are disposed on the spacer, a first anchor plate hole is disposed on the first anchor plate to form the first through hole with the first spacer through hole, and a second anchor plate hole is disposed on the second anchor plate to form the second through hole with the second spacer through hole.
Preferably, the pad is formed in an upwardly tapered shape, the first and second faces are planes inclined with respect to each other, and the first and second anchor plates are parallel to the first and second faces, respectively.
Preferably, the first cushion block through hole and/or the second cushion block through hole are provided with a first end and a second end higher than the first end, and the drift diameter of the first end is larger than that of the second end.
Preferably, circular arc contact surfaces matched with each other are formed between the first surface and the second surface of the cushion block and the first anchor plate and the second anchor plate respectively.
Preferably, the PCCP pipe prestressed reinforcement structure includes a cover provided on the pad plate to cover the anchoring portion, and the cover is filled with a corrosion-preventing material.
Preferably, the pad is provided with a recess for positioning the anchor.
Preferably, both ends of the pad plate in the circumferential direction of the pipe are formed with arc surfaces which conform to the curvature of the pipe.
The second aspect of the invention provides a PCCP pipeline prestress reinforcement method, which comprises the following steps: s1: installing a backing plate on the peripheral surface of the pipeline; s2: installing an anchoring portion on the backing plate, wherein the anchoring portion is provided with a first side surface and a second side surface which are sequentially distributed along the circumferential direction of the pipeline, the anchoring portion is provided with a bottom groove, a first through hole and a second through hole, the first through hole and the second through hole penetrate through the first side surface and the second side surface, the bottom groove is formed at the bottom of the anchoring portion so as to form a cavity between the anchoring portion and the backing plate, and the bottom groove extends from the first side surface to the second side surface; s3: penetrating a steel beam from a port of the first through hole, which is positioned on the first side, penetrating out of a port of the first through hole, which is positioned on the second side, and winding the pipeline, penetrating in from a port of the bottom groove, which is positioned on the first side, penetrating out of a port of the bottom groove, which is positioned on the second side, and winding the pipeline, and penetrating in from a port of the second through hole, which is positioned on the first side, penetrating in from a port of the second through hole, which is positioned on the second side.
Preferably, the method comprises: after step S3, a shield is covered on the anchoring portion, and the shield is filled with a corrosion-preventing material.
According to the technical scheme, the anchoring part, the backing plate and the steel bundles in the reinforcing structure can reasonably penetrate through the first through hole, the second through hole and the bottom groove in the anchoring part, so that the anchoring part is firmly restrained on the backing plate under the action of the steel bundles, and the first through hole and the second through hole which are required are arranged in the anchoring part according to specific conditions, so that the first part and the third part of the steel bundles can extend along the extending directions of the first through hole and the second through hole as far as possible, and the contact between edges of the end surfaces of the steel bundles and the first through hole and the second through hole is relieved, so that breakage and stress concentration of the steel bundles in the tensioning process are avoided; the design of the bottom groove can effectively reduce the chamfer between the steel beam and the pipeline and the installation height of the whole anchoring system, so that the whole anchoring system can uniformly apply the pre-stress along the radial direction of the pipeline to the pipeline, thereby improving the external pre-stress effect of the pipeline.
Drawings
FIG. 1 is a cross-sectional view of a PCCP conduit prestressed reinforcement structure in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic illustration of a first side of an anchor portion of the PCCP conduit prestressed reinforcement structure of FIG. 1;
FIG. 3 is a schematic illustration of a second side of an anchor portion of the PCCP conduit pre-stress reinforcement structure of FIG. 1;
FIG. 4 is a left side view of the PCCP conduit pre-stress reinforcement structure of FIG. 1;
FIG. 5 is a right side view of the PCCP conduit pre-stress reinforcement structure of FIG. 1;
FIG. 6 is a schematic diagram of one embodiment of a spacer of the PCCP conduit pre-stress reinforcement structure of FIG. 1;
FIG. 7 is a schematic view of another embodiment of a spacer of the PCCP conduit pre-stress reinforcement structure of FIG. 1.
Description of the reference numerals
1-Pipeline 2-steel bundle 3-backing plate 4-first anchor plate 5-second anchor plate
6-Cushion block 7-first cushion block through hole 8-shield 9-working clamping piece 10-anti-corrosion material
11-First through hole 12-second through hole 13-bottom groove
21-First anchor plate hole 22-second anchor plate hole
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise stated, terms such as "upper, lower, left, right" are used to refer generally to the upper, lower, left, and right sides of the direction of the drawing plane shown in fig. 1.
The invention provides a PCCP pipe prestress reinforcement structure, which comprises a pipe 1, a steel beam 2 wound on the periphery of the pipe 1, a backing plate 3 arranged on the pipe 1 and an anchoring part arranged on the backing plate 3, wherein the anchoring part is provided with a first side surface and a second side surface which are sequentially distributed along the circumferential direction of the pipe 1, a bottom groove 13, a first through hole 11 and a second through hole 12 are arranged on the anchoring part, the first through hole 11 and the second through hole 12 penetrate through the first side surface and the second side surface, the bottom groove 13 is formed at the bottom of the anchoring part to form a cavity between the anchoring part and the backing plate 3, the bottom groove 13 extends from the first side surface to the second side surface, the steel beam 2 comprises a first part, a second part and a third part which are sequentially connected, the first part penetrates through the first through hole 11 from the first side surface and winds the pipe 1, the second part penetrates through the second through hole 12 from the second side surface and penetrates through the second through hole 13 from the second side surface and penetrates through the third through hole 12 from the bottom part of the pipe 1.
Referring to the structure shown in fig. 1, the backing plate 3 may be made of steel material and adhered to the outer circumferential surface of the PCCP pipe (i.e., pipe 1) by an adhesive; the steel strand 2 refers to a common unbonded prestressed tendon in a prestressed structure, namely, a prestressed tendon or a steel strand with an anti-corrosion isolation layer and an outer sheath, the steel strand 2 preferably comprises an epoxy-sprayed steel strand and two layers of PE (polyethylene) sheaths arranged on the outer side of the steel strand, the epoxy-sprayed steel strand is coated with a layer of compact epoxy coating on the surface layer of the steel strand to carry out anti-corrosion protection on the steel strand, anti-corrosion grease is filled between the two layers of sheaths and between the sheaths and the steel strand, anti-corrosion grease is filled between the two layers of sheaths, and free sliding between the two layers of sheaths can be realized. Because the unbonded steel bundles can generate larger friction force with the water conveying pipeline in the tensioning process, the PE sheath of the unbonded steel bundles is easy to damage in the friction process, when a single-layer PE unbonded prestressed tendon is adopted, PE cannot be effectively protected after being damaged, so that the steel strands are accelerated to corrode under high tensile stress, the permanent pre-stress is reduced, and when the double PE unbonded steel bundles are adopted, when the outer PE sheath is damaged, the inner PE sheath also protects the steel strands.
The backing plate 3 may be provided with recesses for mounting the anchoring portions, such as grooves matching the shape of the bottom surface of the anchoring portion, with which the anchoring portion can be positioned quickly. After the tie plate 3 and the anchor portion are mounted in place, the bundle of steel 2 is threaded through the port of the first through hole 11 of the anchor portion located on the first side of the anchor portion and threaded out of the port of the first through hole 11 located on the second side, then the pipe 1 is wound, i.e. extended along the circumferential surface of the pipe 1 until the bundle of steel 2 again extends to the first side of the anchor portion, threaded out of the second side of the anchor portion via the bottom groove 13, and the pipe 1 is wound again, i.e. extended again along the circumferential surface of the pipe 1 until the bundle of steel 2 again extends to the first side of the anchor portion, and then threaded through the port of the second through hole 12 located on the first side of the anchor portion and threaded out of the port of the second through hole 12 located on the second side.
Wherein the first and second parts of the bundle 2 may be wound around the pipe 1a number of times, provided that the second part is able to penetrate the bottom groove 13 from the first side and the third part is able to penetrate said second through hole 12 from the first side.
The PCCP pipe prestress reinforcement structure provided by the present application may be configured such that a plurality of anchor portions, and a pad 3, a steel bundle 2, etc. that are engaged with the anchor portions are disposed at intervals in the PCCP pipe according to the length of the PCCP pipe.
In the present application, the anchoring portion is firmly restrained on the backing plate 3 under the force of the steel bundle 2, and the present application can provide the required first through hole 11 and second through hole 12 in the anchoring portion according to the specific situation, so that the first portion and the third portion of the steel bundle 2 can extend along the extending direction of the first through hole 11 and the second through hole 12 as much as possible to alleviate the contact between edges of the end surfaces of the steel bundle and the first through hole 11 and the second through hole 12, thereby avoiding breakage and stress concentration of the steel bundle 2 during the tensioning process, i.e. so that the portion of the steel bundle 2 located in the first through hole 11 and the second through hole 12 and the portion of the adjacent steel bundle 2 located outside the first through hole 11 and the second through hole 12 extend along the same line as much as possible; the design of the bottom groove 13 can effectively reduce the cutting angle between the steel bundle 2 and the pipeline 1 and the installation height of the whole anchoring system, so that the whole anchoring system can uniformly apply the pre-compression stress to the pipeline 1 along the radial direction of the pipeline 1.
In addition, the surface of the backing plate 3, which is in contact with the pipeline 1, can be an arc surface with the same curvature as the pipeline 1, so that the backing plate 3 and the pipeline 1 are tightly attached; and when the diameter of the pipe 1 is large so that the contact surface between the pipe 1 and the pad 3 tends to be horizontal, the bottom surface of the pad 3 may be set to be flat. It is also preferable that the two ends of the pad 3 along the circumferential direction of the pipe 1 are formed with curved surfaces that are attached to the pipe 1, for example, rounded corners may be provided on edges of the two ends of the pad 3 that contact the steel bundle 2, so as to avoid the jacket of the steel bundle 2 being scratched by the edges during the stretching process.
Preferably, the first through hole 11 and the second through hole 12 are both straight holes, the position of the port of the first through hole 11 located on the first side is higher than the position of the port of the first through hole 11 located on the second side, and the position of the port of the second through hole 12 located on the second side is higher than the position of the port of the second through hole 12 located on the first side.
Referring to the structure shown in fig. 2 and 3, the first through hole 11 and the second through hole 12 are provided as straight holes capable of facilitating penetration of the steel bundle 2, and when the steel bundle 2 penetrates from the port of the first through hole 11 located at the first side and penetrates from the port of the first through hole 11 located at the second side, the steel bundle 2 has a tendency to extend obliquely downward at this time; similarly, when the steel bundle 2 penetrates from the port of the second through hole 12 located at the first side and penetrates from the port of the second through hole 12 located at the second side, the steel bundle 2 has a tendency to extend obliquely upwards, so that the steel bundle 2 is convenient to wind, and the tangent angle between the steel bundle 2 and the pipeline 1 and the overall installation height of the reinforcing structure are reduced.
Preferably, the anchoring portion includes a first anchor plate 4, a second anchor plate 5 and a spacer 6, the first anchor plate 4 and the second anchor plate 5 are respectively disposed on a first surface and a second surface of the spacer 6 to define the first side surface and the second side surface, a first spacer through hole 7 and a second spacer through hole are disposed on the spacer 6, a first anchor plate hole 21 is disposed on the first anchor plate 4 to form the first through hole 11 with the first spacer through hole 7, and a second anchor plate hole 22 is disposed on the second anchor plate 5 to form the second through hole 12 with the second spacer through hole.
Referring to the structure shown in fig. 1, the anchoring portion is three parts, the cushion block 6 is mounted on the cushion block 3, and the first anchor plate 4 and the second anchor plate 5 are respectively arranged on the first surface and the second surface of the cushion block 6 to form a first through hole 11 and a second through hole 12 together with the first cushion block through hole 7 and the second cushion block through hole respectively, wherein a working clamping piece 9 is arranged on the steel bundle 2 at the position where the first anchor plate 4 and the second anchor plate 5 are connected with the steel bundle 2, and the working clamping piece 9 is matched with the first anchor plate 4 and the second anchor plate 5 to effectively clamp the prestress rib, so that prestress is locked.
In the embodiment shown in fig. 2 and 3, two sets of steel bundles 2 are simultaneously arranged on the spacer block 6, correspondingly, the anchoring part also comprises two sets of first anchor plates 4 and second anchor plates 5, fig. 2 shows two single-hole working anchor plates (i.e. first anchor plates 4) arranged on the first surface of the spacer block 6, fig. 3 shows one double-hole working anchor plate (i.e. second anchor plates 5) arranged on the second surface of the spacer block 6, and of course, two single-hole working anchor plates can be arranged on the second surface of the spacer block 6 to serve as two sets of second anchor plates 5, but the whole structure of the anchoring part can be more compact by selecting one double-hole working anchor plate.
Preferably, the spacer 6 is formed in an upwardly tapered shape, the first surface and the second surface are planes inclined relative to each other, preferably, the cross section of the spacer 6 is isosceles trapezoid, the first anchor plate 4 and the second anchor plate 5 are parallel to the first surface and the second surface, respectively, then the first anchor plate hole 21 in the first anchor plate 4 can form a first through hole 11 extending in a straight line with the first spacer through hole 7, and similarly, the second anchor plate hole 22 in the second anchor plate 5 can form a second through hole 12 extending in a straight line with the second spacer through hole.
In another embodiment, the first surface and the second surface of the cushion block 6 and the first anchor plate 4 and the second anchor plate 5 may be respectively provided with arc contact surfaces that are matched with each other, the arc contact surfaces can adjust the installation angle of the steel bundle 2 according to different diameters of the pipeline 1 during tensioning, and the first anchor plate 4 and the second anchor plate 5 can always keep surface contact with the cushion block 6 during adjustment.
In order to facilitate adjustment of the installation angle of the steel bundle 2, the first end of the first pad through hole 7 and/or the second pad through hole has a larger diameter than the second end thereof, wherein the first end of the first pad through hole 7 and/or the second pad through hole is positioned lower than the second end thereof.
Fig. 6 shows an embodiment of the spacer 6, wherein the first spacer through hole 7 has a gradually enlarged shape; fig. 7 shows a further embodiment of the spacer 6, wherein the first spacer through hole 7 has a stepped shape which increases gradually. The first anchor plate hole 21 is not larger than the aperture of the first cushion block through hole 7, so that when the installation angle of the steel beam 2 needs to be adjusted (for example, the diameter of the pipeline 1 changes), the first anchor plate hole 21 can be flexibly aligned with different positions of the first cushion block through hole 7, and universality is enhanced.
Since the arrangement form of the second pad through holes is identical to that of the first pad through holes, the arrangement form of the second pad through holes will not be summarized one by one, and accordingly, the second anchor plate holes 22 are not larger than the aperture of the second pad through holes.
Preferably, the PCCP pipe prestressed reinforcement structure includes a cover 8, the cover 8 is disposed on the pad 3 to cover the anchoring portion, and the cover 8 is filled with a corrosion-preventing material 10.
Referring to the structures of fig. 4 and 5, the shield 8 can effectively protect the anchor portion, and furthermore, since the end face of the steel bundle 2 is not protected, the shield 8 can protect the end face of the steel bundle 2. Wherein, the shield 8 can be fixed on the backing plate 3 through bolts, and sealing materials such as rubber pads can be arranged between the shield 8 and the backing plate 3 to increase the tightness. The top of the shield 8 is provided with grouting holes for grouting the anti-corrosive material 10 into the shield 8; the side of guard shield 8 is provided with the opening that is used for making steel bundle 2 pass, installs flexible rubber sleeve pipe in the open-ended position to protect steel bundle 2, avoid wearing and tearing between the lateral wall of steel bundle 2 and guard shield 8, and flexible sleeve pipe has good pliability, can adapt to steel bundle 2 of different extension angles.
In addition, according to another aspect of the present invention, there is also provided a PCCP pipe prestressing method, the method including:
S1: a backing plate 3 is arranged on the peripheral surface of the pipeline 1; s2: installing an anchor part on the backing plate 3, wherein the anchor part is provided with a first side surface and a second side surface which are distributed in sequence along the circumferential direction of the pipeline 1, a bottom groove 13 and a first through hole 11 and a second through hole 12 are arranged on the anchor part, the first through hole 11 and the second through hole 12 penetrate through the first side surface and the second side surface, the bottom groove 13 is formed at the bottom of the anchor part so as to form a cavity between the anchor part and the backing plate 3, and the bottom groove 13 extends from the first side surface to the second side surface; s3: the steel bundle 2 is inserted into the first through hole 11 from the port located at the first side and is inserted into the second through hole 11 from the port located at the second side and is wound around the pipe 1, then inserted into the bottom groove 13 from the port located at the first side and is inserted into the bottom groove 13 from the port located at the second side and is wound around the pipe 1, and finally inserted into the second through hole 12 from the port located at the first side and is inserted into the second through hole 12 from the port located at the second side. In addition, after step S3, a shield 8 may be selected, the anchoring portion may be covered with the shield 8, and the shield 8 may be filled with the anti-corrosive material 10.
Wherein, the backing plate 3 can be made of steel material and is adhered on the peripheral surface of the PCCP pipe (namely the pipe 1) through an adhesive; the steel bundle 2 can be wound on the pipe 1 for a plurality of turns, as long as the second part can penetrate into the bottom groove 13 from the first side and the third part can penetrate into the second through hole 12 from the first side; the anti-corrosive material 10 may enter the shield 8 through a grouting hole provided at the top of the shield 8.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of individual specific technical features in any suitable way. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (8)
1. The PCCP pipeline prestress reinforcement structure is characterized by comprising a pipeline (1), a steel bundle (2) wound on the periphery of the pipeline (1), a base plate (3) arranged on the pipeline (1) and an anchoring part arranged on the base plate (3), wherein the anchoring part is provided with a first side surface and a second side surface which are distributed in sequence along the circumferential direction of the pipeline (1), a bottom groove (13), a first through hole (11) and a second through hole (12) are arranged on the anchoring part, the first through hole (11) and the second through hole (12) are communicated with the first side surface and the second side surface, the bottom groove (13) is formed at the bottom of the anchoring part so as to form a cavity between the anchoring part and the base plate (3), the bottom groove (13) extends from the first side surface to the second side surface,
Wherein the steel bundle (2) comprises a first part, a second part and a third part which are sequentially connected, wherein the first part passes through the first through hole (11) from the first side and winds the pipeline (1), the second part passes through the bottom groove (13) from the first side and winds the pipeline (1), and the third part passes through the second through hole (12) from the first side;
The anchoring part comprises a first anchor plate (4), a second anchor plate (5) and a cushion block (6), wherein the first anchor plate (4) and the second anchor plate (5) are respectively arranged on a first surface and a second surface of the cushion block (6) to limit the first side surface and the second side surface, a first cushion block through hole (7) and a second cushion block through hole are formed in the cushion block (6), a first anchor plate hole (21) is formed in the first anchor plate (4) so as to form a first through hole (11) with the first cushion block through hole (7), and a second anchor plate hole (22) is formed in the second anchor plate (5) so as to form a second through hole (12) with the second cushion block through hole;
the cushion block (6) is formed into an upwardly tapered shape, the first face and the second face are planes inclined relative to each other, and the first anchor plate (4) and the second anchor plate (5) are parallel to the first face and the second face respectively;
the PCCP pipeline prestress reinforcement structure further comprises a shield (8), wherein the shield (8) is arranged on the backing plate (3) to cover the anchoring portion, and the shield (8) is filled with an anti-corrosion material (10).
2. PCCP pipe prestressing structure according to claim 1, characterized in that the first through hole (11) and the second through hole (12) are both straight holes, the position of the port of the first through hole (11) at the first side is higher than the position of the port of the first through hole (11) at the second side, and the position of the port of the second through hole (12) at the second side is higher than the position of the port of the second through hole (12) at the first side.
3. PCCP pipe prestressing structure according to claim 1, characterized in that the first spacer through hole (7) and/or the second spacer through hole have a first end and a second end located higher than the first end, the first end having a larger diameter than the second end.
4. PCCP pipe prestressed reinforcement structure according to claim 1, characterized in that the first and second faces of said spacer block (6) are formed with mutually cooperating circular arc contact faces with said first anchor plate (4) and said second anchor plate (5), respectively.
5. PCCP pipe prestressing structure according to claim 1, characterized in that the shim plate (3) is provided with recesses for positioning the anchoring portion.
6. PCCP pipe prestressed reinforcement structure according to any of claims 1-5, characterized in that both ends of said pad plate (3) in the circumferential direction of said pipe (1) are formed with cambered surfaces that conform to the curvature of said pipe (1).
7. A PCCP pipe prestress reinforcement method, characterized in that the method reinforces a PCCP pipe by the PCCP pipe prestress reinforcement structure of any one of claims 1 to 6, the method comprising:
s1: a backing plate (3) is arranged on the peripheral surface of the pipeline (1);
S2: an anchoring part is arranged on the backing plate (3), the anchoring part is provided with a first side surface and a second side surface which are sequentially distributed along the circumferential direction of the pipeline (1), the anchoring part is provided with a bottom groove (13), a first through hole (11) and a second through hole (12), the first through hole (11) and the second through hole (12) penetrate through the first side surface and the second side surface, the bottom groove (13) is formed at the bottom of the anchoring part so as to form a cavity between the anchoring part and the backing plate (3), and the bottom groove (13) extends from the first side surface to the second side surface;
s3: penetrating a steel bundle (2) from a port of the first through hole (11) which is positioned on the first side surface, penetrating and winding the pipeline (1) from a port of the first through hole (11) which is positioned on the second side surface, penetrating from a port of the bottom groove (13) which is positioned on the first side surface, penetrating from a port of the bottom groove (13) which is positioned on the second side surface, winding the pipeline (1), and penetrating from a port of the second through hole (12) which is positioned on the first side surface, penetrating from a port of the second through hole (12) which is positioned on the second side surface.
8. The method according to claim 7, characterized in that the method comprises: after step S3, a shield (8) is placed over the anchor portion and the shield (8) is filled with a corrosion-resistant material (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017110457337 | 2017-10-31 | ||
| CN201711045733 | 2017-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109723915A CN109723915A (en) | 2019-05-07 |
| CN109723915B true CN109723915B (en) | 2024-05-07 |
Family
ID=62663232
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721747064.3U Active CN207555004U (en) | 2017-10-31 | 2017-12-14 | PCCP pipeline prestressed reinforcement structures |
| CN201711342686.2A Active CN109723915B (en) | 2017-10-31 | 2017-12-14 | PCCP (prestressed concrete cylinder pipe) prestress reinforcing structure and reinforcing method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721747064.3U Active CN207555004U (en) | 2017-10-31 | 2017-12-14 | PCCP pipeline prestressed reinforcement structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN207555004U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207555004U (en) * | 2017-10-31 | 2018-06-29 | 北京市水利规划设计研究院 | PCCP pipeline prestressed reinforcement structures |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08260448A (en) * | 1995-03-22 | 1996-10-08 | P S Co Ltd | Pressure-resistant cylindrical pipe and laying method thereof |
| CN201954130U (en) * | 2011-01-20 | 2011-08-31 | 天津市银龙预应力钢材集团有限公司 | Indented ribbed prestressed pipe |
| CN204083547U (en) * | 2014-07-30 | 2015-01-07 | 四川国统混凝土制品有限公司 | A kind of Prestressed concrete cylinder pipe of inner liner stainless steel cylinder |
| CN104495534A (en) * | 2014-12-12 | 2015-04-08 | 天津市泽宝水泥制品有限公司 | Pipe core skid resistance anchoring device for vertical wire wrapping machine for prestressed concrete cylinder pipe |
| CN104963300A (en) * | 2015-07-24 | 2015-10-07 | 重庆交通大学 | External prestress multipoint anchoring strengthening method of bridge structure |
| CN207555004U (en) * | 2017-10-31 | 2018-06-29 | 北京市水利规划设计研究院 | PCCP pipeline prestressed reinforcement structures |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6578882B2 (en) * | 2000-11-10 | 2003-06-17 | Hancor, Inc. | Corrugated pipe structure |
| AU2003268439A1 (en) * | 2002-09-04 | 2004-03-29 | Knauf Insulation Gmbh | Pipe blanket to fit a variety of pipe diameters |
-
2017
- 2017-12-14 CN CN201721747064.3U patent/CN207555004U/en active Active
- 2017-12-14 CN CN201711342686.2A patent/CN109723915B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08260448A (en) * | 1995-03-22 | 1996-10-08 | P S Co Ltd | Pressure-resistant cylindrical pipe and laying method thereof |
| CN201954130U (en) * | 2011-01-20 | 2011-08-31 | 天津市银龙预应力钢材集团有限公司 | Indented ribbed prestressed pipe |
| CN204083547U (en) * | 2014-07-30 | 2015-01-07 | 四川国统混凝土制品有限公司 | A kind of Prestressed concrete cylinder pipe of inner liner stainless steel cylinder |
| CN104495534A (en) * | 2014-12-12 | 2015-04-08 | 天津市泽宝水泥制品有限公司 | Pipe core skid resistance anchoring device for vertical wire wrapping machine for prestressed concrete cylinder pipe |
| CN104963300A (en) * | 2015-07-24 | 2015-10-07 | 重庆交通大学 | External prestress multipoint anchoring strengthening method of bridge structure |
| CN207555004U (en) * | 2017-10-31 | 2018-06-29 | 北京市水利规划设计研究院 | PCCP pipeline prestressed reinforcement structures |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109723915A (en) | 2019-05-07 |
| CN207555004U (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5567205B2 (en) | Sealing mechanism | |
| US7878730B2 (en) | Bar coupling apparatus and methods | |
| EP2550401B1 (en) | Bridge saddle and method for protecting strands from corrosion in such bridge saddle | |
| KR20110111907A (en) | Saddle structure for cable-stayed cable-stayed bridge | |
| KR20200025341A (en) | Reinforcement method of reinforced concrete column using steel plate | |
| CN109723915B (en) | PCCP (prestressed concrete cylinder pipe) prestress reinforcing structure and reinforcing method | |
| CN108643454A (en) | A kind of the prestressed group anchorage system and its construction method of internal single beam sealing | |
| KR20110106642A (en) | Lower body for removable U-turn anchor | |
| CN108824838A (en) | Prestressed concrete cylinder pipe external prestressing strengthening system and its construction method | |
| JP2003055911A (en) | Structure at the saddle outlet of diagonal cable | |
| CN110331868B (en) | External prestress reinforcing method for support pillar removing | |
| AU2021102932A4 (en) | Novel unbonded annular anchor prestressed concrete lining and construction method thereof | |
| CN109837990B (en) | Annular anchor cable type prestressed concrete cylinder shell structure and construction method | |
| JP2007009482A (en) | Reinforcing structure and reinforcing method of concrete structure | |
| CN208293398U (en) | A kind of attachment device of segmented prestress wire | |
| CN216973118U (en) | Waterproof cable saddle | |
| CN212317318U (en) | Prestressed concrete stretch-draw stiff end extrusion formula anchor structure | |
| CN211922651U (en) | Anchor cable device for engineering | |
| CN209053458U (en) | Prestressed concrete cylinder pipe external prestressing strengthening system | |
| KR20200025343A (en) | Reinforcement structure reinforced with steel plates | |
| KR101825018B1 (en) | Combining type load distributive anchor | |
| KR101941873B1 (en) | Waterproof structure of upper steel anckorage for permanent anchor | |
| CN216445983U (en) | Bored concrete pile slip casting device | |
| CN220352803U (en) | PHC tubular pile crack repair structure | |
| JP2004131956A (en) | Grout cap of pc wire anchorage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |