CN215629379U

CN215629379U - Novel FRP inhaul cable anchoring and connecting structure

Info

Publication number: CN215629379U
Application number: CN202122175997.2U
Authority: CN
Inventors: 陆林; 曹海勇; 董东升; 李自宏; 杜隆基
Original assignee: Anhui Province Highway and Port Engineering Co Ltd; CCCC Highway Long Bridge Construction National Engineering Research Center Co Ltd
Current assignee: Anhui Province Highway and Port Engineering Co Ltd; CCCC Highway Long Bridge Construction National Engineering Research Center Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-01-25
Anticipated expiration: 2031-09-08

Abstract

The utility model relates to the technical field of cable anchoring, in particular to a novel FRP cable anchoring connection structure which comprises an FRP stranded wire, an FRP stranded wire anchor, an anchor connector, a steel stranded wire and a steel stranded wire anchor, wherein one end of the FRP stranded wire anchor is connected with the FRP stranded wire, the other end of the FRP stranded wire anchor is provided with a first internal thread, one end of the steel stranded wire anchor is connected with the steel stranded wire, the other end of the steel stranded wire anchor is provided with a second internal thread, the anchor connector is in a cylindrical shape, one end of the anchor connector is provided with a first external thread matched with the first internal thread, and the other end of the anchor connector is provided with a second external thread matched with the second internal thread. The utility model adopts the same method as the steel cable to stretch and anchor, and does not need to arrange an anchoring tool with a complex structure, thereby not changing the structure and the stress performance of the anchor head of the original group, and not influencing the installation of subsequent auxiliary components.

Description

Novel FRP inhaul cable anchoring and connecting structure

Technical Field

The utility model relates to the technical field of cable anchoring, in particular to a novel FRP cable anchoring connection structure.

Background

The FRP is a novel composite material formed by taking fiber as a reinforcing material, taking resin as a matrix material, doping an auxiliary agent, and performing drawing forming and necessary surface treatment. Compared with steel, the FRP has excellent performances of light weight, high strength, corrosion resistance, good fatigue resistance and the like, so the FRP inhaul cable made of the FRP has good application prospect. However, because the transverse shear strength of the FRP is low, the FRP inhaul cable has the problem of difficult anchoring, and is easy to generate a large stress peak value at the outlet of the anchorage device, and the FRP inhaul cable cannot be anchored at the end group anchor by using a wedge-shaped clamping piece like a steel cable.

In order to prevent the FRP inhaul cable from being damaged in advance, the main mode adopted at home and abroad is to anchor the FRP inhaul cable passing through a group anchor port on a tool spliced on a group anchor in advance in an extending way, so that the mechanical property of the FRP inhaul cable is fully exerted. However, this anchoring method also has the following disadvantages: before the tool is manufactured, the looseness and the stretching elongation of a stay cable need to be fully considered, so that the designed tool is generally longer and larger; the design of the tool also needs to be combined with the structural size of the group anchor head, so that the structure is more complex, the installation and operation are more difficult, and the consumed time is long; the tool and the anchor head are often connected by welding and bolts, so that the original structure and the stress condition are adversely affected; the FRP cable extends out independently, and the difficulty in mounting the anchor cover in the later period is increased; the tool needs to be exposed to the external environment for a long time and is easy to rust; in addition, in order to control the cable force value in the stretching process when the FRP cable is stretched, a sensor is often additionally installed, so that the construction process is more complicated, the sensor is easy to damage, and the construction cost and the later maintenance cost are increased. Therefore, the economical efficiency and the applicability of the FRP inhaul cable are greatly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel FRP inhaul cable anchoring connection structure, which solves the problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a novel FRP cable anchor connection structure, includes FRP stranded conductor, FRP stranded conductor ground tackle, ground tackle connector, steel strand wires and steel strand wires ground tackle, the one end of FRP stranded conductor ground tackle links to each other with the FRP stranded conductor, and the other end of FRP stranded conductor ground tackle is provided with first internal thread, the one end of steel strand wires ground tackle with the steel strand wires are connected, and the other end of steel strand wires ground tackle sets up the second internal thread, ground tackle connector is the cylinder size, the one end setting of ground tackle connector with first interior screw-thread fit's first external screw thread, the other end setting of ground tackle connector with second interior screw-thread fit's second external screw thread.

The scheme mainly utilizes a section of shorter steel strand as an auxiliary cable for anchoring and tensioning the FRP cable, and when the scheme is adopted, the FRP strand and the steel strand are connected together through the FRP strand anchorage device, the steel strand anchorage device and the anchorage device connector to form a composite FRP strand, and then the composite FRP strand is wound together with other conventional steel strands or other composite FRP strands to form the FRP composite cable, compared with the common steel cable which is formed by winding all conventional steel strands, the FRP composite cable has lighter weight and better mechanical property, when the FRP composite cable is anchored by adopting a group anchor head, because the end part of the FRP composite cable is the steel strand, the tensioning and anchoring can be carried out in the same way as the common steel cable, and therefore, an anchoring tool with a complex structure is not required to be arranged aiming at the extension line of the composite FRP cable, and an anchoring tool is not required to be welded on the group anchor head, the structure and the stress performance of the original group anchor head can not be changed, the installation of subsequent auxiliary components can not be influenced, and the whole connecting structure is arranged in the anchor cup, so that the problems of corrosion, corrosion and the like are not easy to occur.

Furthermore, the steel strand wires are intelligent steel strand wires, the intelligent steel strand wires comprise center wires and a plurality of steel wires wound on the periphery of the center wires, and the center wires comprise transmission optical fibers with fiber grating sensors and fiber reinforcing rib layers coated outside the transmission optical fibers.

When the scheme is adopted, the transmission optical fibers in the intelligent steel strand can be extended and led out to be connected with a monitoring computer, the change of the cable force during tensioning is monitored in real time, and the size of the cable force during actual tensioning is matched with the designed cable force.

Preferably, the FRP strand anchor is a common friction type anchor.

Preferably, the FRP strand anchor is a common extrusion type tapered anchor.

Preferably, the FRP strand anchor is a general bonding type anchor.

Compared with the mode of anchoring the FRP cables passing through the group anchor mouth on a tool spliced on the group anchor head in advance in an extending way, the scheme of the utility model at least has the following beneficial effects:

(1) the utility model adopts a short section of intelligent steel strand as an auxiliary cable for anchoring and tensioning the FRP inhaul cable, thereby being capable of tensioning and anchoring in the same way as the common steel cable, without purchasing tensioning equipment for the FRP inhaul cable independently, saving a large amount of cost, reducing the construction cost, and without arranging an anchoring tool with a complex structure and welding the anchoring tool on the group anchor head, thereby not changing the structure and the stress performance of the original group anchor head, and not influencing the installation of subsequent auxiliary components, and the FRP strand anchorage, the anchorage connector and the steel strand anchorage of the connecting structure can be arranged in the anchor cup, and the problems of corrosion, corrosion and the like are not easy to occur.

(2) The intelligent steel strand adopted by the utility model can monitor the change of the cable force in real time during tensioning, improves the construction precision, does not need to be provided with an additional sensor, and reduces the construction process and the later maintenance cost.

(3) The FRP inhaul cable has reasonable and reliable structural design and excellent stress performance, can fully exert the characteristic of high tensile strength of the FRP inhaul cable, each anchorage device and the anchorage device connector are prepared in advance, the structure is simple and light, the transportation is convenient, the field connection is simple and easy to operate, a large amount of time and labor force can be saved, the construction efficiency is improved, and the construction period is shortened.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

Fig. 1 is an exploded view of the structure of an embodiment of the present invention.

Fig. 2 is a schematic perspective view of the structure of the embodiment of the present invention.

The drawings are numbered as follows:

the FRP stranded wire anchoring device comprises an FRP stranded wire 1, an FRP stranded wire anchoring device 2, a first internal thread 201, an anchoring device connector 3, a first external thread 301, a second external thread 302, a steel stranded wire anchoring device 4 and a steel stranded wire 5.

Detailed Description

The following is further detailed by way of specific embodiments:

the first embodiment is as follows: the utility model provides a novel FRP cable anchor connection structure, as shown in figure 1, as shown in figure 2, including FRP stranded conductor 1, FRP stranded conductor ground tackle 2, ground tackle connector 3, steel strand wires 5 and steel strand wires ground tackle 4, in this embodiment, FRP stranded conductor ground tackle 2 adopts ordinary friction type ground tackle, FRP stranded conductor ground tackle 2's one end and FRP stranded conductor 1 are connected, FRP stranded conductor ground tackle 2's the other end is provided with first internal thread 201, steel strand wires ground tackle 4's one end and steel strand wires 5 are connected, steel strand wires ground tackle 4's the other end sets up the second internal thread, ground tackle connector 3 is the cylinder size, ground tackle connector 3's one end sets up first external screw thread 301 with first internal thread 201 complex, ground tackle connector 3's the other end set up with second internal thread complex second external screw thread 302.

In order to monitor the change of the cable force during tensioning in real time, the steel strand 5 is set to be an intelligent steel strand, the intelligent steel strand comprises a central wire and a plurality of steel wires wound on the periphery of the central wire, the central wire comprises a transmission optical fiber with a fiber grating sensor and a fiber reinforced rib layer coated outside the transmission optical fiber, the transmission optical fiber in the intelligent steel strand can be extended and led out to be connected with a monitoring computer, the change of the cable force during tensioning is monitored in real time, and the size of the cable force during actual tensioning is matched with the designed cable force.

In the embodiment, a section of shorter intelligent steel strand is mainly used as an auxiliary cable for anchoring and tensioning the FRP cable, the FRP strand and the intelligent steel strand are connected together through an FRP strand anchorage device, a steel strand anchorage device and an anchorage device connector to form a composite FRP strand, and then the composite FRP strand is wound together with other conventional steel strands or other composite FRP strands to form the FRP composite cable, compared with a common steel cable which is formed by winding all conventional steel strands, the FRP composite cable has lighter weight and better mechanical property, when the FRP composite cable is anchored by adopting a group anchor head, because the end part of the composite FRP cable is the steel strand, the tensioning and anchoring can be carried out in the same way as the common steel cable, an anchoring tool with a complex structure is not required to be arranged aiming at the composite FRP cable, and an anchoring tool is not required to be welded on the group anchor head, the structure and the stress performance of the original group anchor head can not be changed, the installation of subsequent auxiliary components can not be influenced, and the whole connecting structure is arranged in the anchor cup, so that the problems of corrosion, corrosion and the like are not easy to occur.

The intelligent steel strand wires that this embodiment adopted can the change of cable force when real time monitoring stretch-draw, improve the construction precision, need not to set up extra sensor, reduce construction process and later maintenance cost.

The structural design of this embodiment is reasonable reliable, and the atress performance is excellent, can the high characteristics of full play FRP cable tensile strength, and each ground tackle and ground tackle connector all are prepared in advance, and simple structure is light, and convenient transportation, the simple easy operation of field connection can save plenty of time and labour, improves the efficiency of construction, reduction of erection time.

Example two: the difference from the first embodiment is that the FRP stranded wire anchor 2 in the present embodiment is a common extrusion type tapered anchor.

Example three: the difference from the first embodiment is that the FRP stranded wire anchor 2 in the present embodiment is a general bonding type anchor.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. The utility model provides a novel FRP cable anchor connection structure, includes FRP stranded conductor and FRP stranded conductor ground tackle, its characterized in that: the steel strand anchor comprises an FRP strand anchor and is characterized by further comprising an anchor connector, a steel strand and a steel strand anchor, wherein one end of the FRP strand anchor is connected with the FRP strand, the other end of the FRP strand anchor is provided with a first internal thread, one end of the steel strand anchor is connected with the steel strand, the other end of the steel strand anchor is provided with a second internal thread, the anchor connector is of a cylindrical body type, one end of the anchor connector is provided with a first external thread matched with the first internal thread, and the other end of the anchor connector is provided with a second external thread matched with the second internal thread.

2. The novel FRP cable anchoring connection structure as claimed in claim 1, wherein: the steel strand wires are intelligent steel strand wires, the intelligent steel strand wires comprise center wires and a plurality of steel wires wound on the periphery of the center wires, and the center wires comprise transmission optical fibers with fiber grating sensors and fiber reinforcing rib layers coated outside the transmission optical fibers.

3. The novel FRP cable anchoring connection structure as claimed in claim 2, wherein: the FRP stranded wire anchorage device is a common friction type anchorage device.

4. The novel FRP cable anchoring connection structure as claimed in claim 2, wherein: the FRP stranded wire anchorage device is a common extrusion type conical anchorage device.

5. The novel FRP cable anchoring connection structure as claimed in claim 2, wherein: the FRP stranded wire anchorage device is a common bonding type anchorage device.