CN103115709A - Wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement - Google Patents
Wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement Download PDFInfo
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- CN103115709A CN103115709A CN2013100213003A CN201310021300A CN103115709A CN 103115709 A CN103115709 A CN 103115709A CN 2013100213003 A CN2013100213003 A CN 2013100213003A CN 201310021300 A CN201310021300 A CN 201310021300A CN 103115709 A CN103115709 A CN 103115709A
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- tension stress
- protective device
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Abstract
The invention discloses a wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement. Blocks are arranged at two ends of a columnar hollow tube body of the wire rope extensometer protective device for the monitoring tension stress of the prestressed reinforcement, thru holes are further formed in the blocks, helical reinforcement and helical mechanical nicks are arranged on the outer surface of the tube body to enhance anchoring of the tube body and concrete. By means of the wire rope extensometer protective device for the monitoring tension stress of the prestressed reinforcement, the key technical problem of monitoring the tension stress of the prestressed reinforcement inside a prestressed concrete member with a vibration wire type wire rope extensometer is solved, the use of the vibration wire type wire rope extensometer enables monitoring data to have the advantages of being stable and reliable, and thus long-term monitoring is guaranteed. The wire rope extensometer protective device for the monitoring tension stress of the prestressed reinforcement is small in size, low in weight and high in strength and stiffness, the wire rope extensometer protective device, thus a protective effect to a sensor is achieved, thus the wire rope extensometer can stretch freely and move in a small range inside the concrete member, thus monitoring to the tension stress of the prestressed reinforcement is achieved, and entire stress performance of a structure is influenced lightly.
Description
Technical field
The present invention relates to a kind of protective device of cable wire meter, relate in particular to a kind of cable wire meter protective device for monitoring deformed bar tension stress.
Background technology
Prestressed reinforced concrete construction is a kind of very important version in civil engineering.The various aspects in field of civil engineering are contained in the application of prestressed concrete, as large public building, long-span bridge girder construction and large-scale hydraulic and electric engineering facility etc.These buildings in occupation of consequence, if the problem of configuration aspects occurs in-service, may cause engineering accident when serious in national economy is produced, cause bad social influence.Therefore to important prestressed reinforced concrete construction carry out corresponding construction, the health monitoring work in the stage of being on active service just seems particularly necessary.
Structural health monitoring technology has become the focus of field of civil engineering at present.Many important buildingss have all been used this technology both at home and abroad.The content that specifically comprises the aspects such as static(al), power, geometry and environment for the monitoring of buildings.Particularly static(al) monitoring, the service state of structure under normal working load is most important for grasping.But, see with regard to the present applicable cases of prestressed reinforced concrete construction health monitoring technology, few to the tension stress monitoring method in the presstressed reinforcing steel length range.And the tension stress of deformed bar is the important indicator of reaction prestressed structure state.
Current, the cable wire meter is the ideal transducer of rope class tension stress monitoring.It has data stabilization reliable, be subjected to environmental factor disturb little, be fit to the advantage such as wide range strain measurement.Yet using the cable wire meter directly to monitor presstressed reinforcing steel is difficult to again realize.Because deformed bar is bonded section within it by concrete, so just need cable wire meter attached thereto also together to be cast in concrete.Can limit the flexible of cable wire meter after the concrete coagulation sclerosis, thereby make it ineffective.Therefore, form a space that is beneficial to the survival of cable wire meter at inside concrete and just become the key of dealing with problems.
Summary of the invention
The present invention be directed to that the problems referred to above propose, purpose just is to provide a kind of cable wire meter protective device for monitoring deformed bar tension stress.This protective device can form free space around inside concrete, cable wire meter, guarantee the free-extension of cable wire meter and move among a small circle, thereby realizing that the cable wire meter is in the monitoring of inside concrete to tension of prestressed tendon stress.
The objective of the invention is to realize by the following technical solutions:
A kind of cable wire meter protective device for monitoring deformed bar tension stress, the body two-port of its columnar hollow is equipped with shutoff; And described shutoff is provided with open-work, and the outside surface of this body is provided with spiral reinforcement or screw machine indentation, in order to strengthen body and concrete anchoring.
At least be provided with a through hole on the adapting position of described body.
Described body is made by one of round steel pipe or rectangular steel tube.
Shutoff one end at described body two ends is the fixed port shutoff; The other end is the active port shutoff.
Described shutoff external diameter is greater than described body external diameter.
The present invention compared with prior art has following advantageous effect: the present invention is provided with spiral reinforcement or screw machine indentation due to the body that has adopted columnar hollow and on the outside surface of body, in order to strengthen body and concrete anchoring.The cable wire meter is placed in body, has formed the required free space of cable wire meter survival at inside concrete, thereby realized utilizing the monitoring to tension of prestressed tendon stress in prestressed reinforced concrete construction inside of cable wire meter.Volume of the present invention is little, lightweight, with low cost; long service life, and the higher strength and stiffness of tool are built it in concrete and can be played a very good protection to sensor; and can not produce significantly impact to the holistic resistant behavior of structure, have social benefit preferably.
Description of drawings
Fig. 1 is perspective view of the present invention;
Fig. 2 is that cable wire meter of the present invention is fixed in the structural representation on deformed bar;
Fig. 3 is the perspective view of the present invention's duty in concrete.
In figure: body 1, open-work 2, shutoff 3, through hole 4, spiral reinforcement or screw machine indentation 5, cable wire meter 6, deformed bar 7.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail; but protection scope of the present invention is not limited by specific embodiment; be as the criterion with claims; in addition; with under the prerequisite of technical solution of the present invention, within any change that those of ordinary skills that the present invention is made easily realize or change can fall into claim scope of the present invention.
A kind of cable wire meter protective device for monitoring deformed bar tension stress of the present invention as shown in Figure 1, body 1 two-port of its columnar hollow is equipped with shutoff 3; One end is the fixed port shutoff; The other end is the active port shutoff, and described shutoff 3 is provided with open-work 2, and shutoff 3 external diameters are greater than described body 1 external diameter.Described body 1 selects round steel pipe to process, and external diameter is between 8 ~ 12cm, and length is between 0.6 ~ 1.0m, and thickness is between 3 ~ 5mm.Be welded with the spiral reinforcement 5 of φ 6 on the outside surface of body 1, in order to strengthen body 1 and concrete anchoring.The adapting position of described body 1 is provided with two through holes 4, wherein be located at the middle part one as oil hole, another be located at the edge as the wire fairlead.
Described body 1 adopts rectangular steel tube to process, and is welded with the screw machine indentation 5 of φ 6 on the outside surface of body 1, in order to strengthen body 1 and concrete anchoring.The other the same as in Example 1 repeats no more.
During concrete the use:
First with the 1 centering welding of fixed port shutoff and body, then the open-work 2 of deformed bar 7 from the active port shutoff penetrated as shown in Figure 2 and Figure 3, pass from the open-work 2 of fixed port shutoff.Stop wearing muscle during apart from design attitude 0.6 ~ 1m when deformed bar 7.At this moment deformed bar 7 surrounding layers are carried out peeling and process, and according to cable wire meter design attitude, cable wire meter 6 is installed.Again with deformed bar 7 and cable wire meter 6 along entering body 1 interior suitable position, simultaneously cable wire meter 6 wires are drawn from fairlead.At last active port shutoff and body 1 are welded, to oil hole filling butter, with foamed glue to apparatus of the present invention sealing gap.
Claims (5)
1. cable wire meter protective device that is used for monitoring deformed bar tension stress, it is characterized in that: the body of columnar hollow (1) two-port is equipped with shutoff (3); And described shutoff (3) is provided with open-work (2), and the outside surface of this body (1) is provided with spiral reinforcement or screw machine indentation (5), in order to strengthen body (1) and concrete anchoring.
2. a kind of cable wire meter protective device for monitoring deformed bar tension stress according to claim 1, is characterized in that: be provided with at least a through hole (4) on the adapting position of described body (1).
3. a kind of cable wire meter protective device for monitoring deformed bar tension stress according to claim 1, it is characterized in that: described body (1) is made by one of round steel pipe or rectangular steel tube.
4. a kind of cable wire meter protective device for monitoring deformed bar tension stress according to claim 1 is characterized in that: shutoff (3) one ends at described body (1) two ends are the fixed port shutoff; The other end is the active port shutoff.
5. according to claim 1 or 4 described a kind of cable wire meter protective devices for monitoring deformed bar tension stress, it is characterized in that: described shutoff (3) external diameter is greater than described body (1) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021300.3A CN103115709B (en) | 2013-01-22 | 2013-01-22 | A kind of for monitoring the cable wire meter protective device of deformed bar tension stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021300.3A CN103115709B (en) | 2013-01-22 | 2013-01-22 | A kind of for monitoring the cable wire meter protective device of deformed bar tension stress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103115709A true CN103115709A (en) | 2013-05-22 |
| CN103115709B CN103115709B (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310021300.3A Expired - Fee Related CN103115709B (en) | 2013-01-22 | 2013-01-22 | A kind of for monitoring the cable wire meter protective device of deformed bar tension stress |
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| CN (1) | CN103115709B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339340A (en) * | 2018-10-25 | 2019-02-15 | 贵州理工学院 | A kind of external prestressing confined concrete filled tubular columns and its processing method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5038622A (en) * | 1989-12-22 | 1991-08-13 | Tijmann Willem B | Strain gage assembly for measuring excessive tensile strain of a flexible elongated member, such as a steel structural cable, or an electrical transmission cable, or a glass fiber optic communication cable, which may slightly twist under tensile strain |
| CN1727600A (en) * | 2004-07-26 | 2006-02-01 | 北京市建筑工程研究院 | Method for converting stretching ends with binding prestress to stretching ends without binding prestress |
| CN1807050A (en) * | 2006-01-26 | 2006-07-26 | 许宏元 | Prestressing system device of concrete structure and method for manufacturing the same |
| CN200962030Y (en) * | 2006-09-22 | 2007-10-17 | 宁波杉工结构监测与控制工程中心有限公司 | Non enhanced optical fiber grating reinforcing steel bar device |
| CN201266127Y (en) * | 2008-09-28 | 2009-07-01 | 中冶建筑研究总院有限公司 | Force value monitoring device for steel bundle with bonding pre-stress |
| US20120314540A1 (en) * | 2011-06-07 | 2012-12-13 | Alter Josef K | Hollow rebar for crosshole sonic logging access tubes and longitudinal concrete reinforcing in drilled shafts |
| CN203148608U (en) * | 2013-01-22 | 2013-08-21 | 沈阳建筑大学 | Steel rope gauge protection device for monitoring tensile stress of prestressed reinforcing bars |
-
2013
- 2013-01-22 CN CN201310021300.3A patent/CN103115709B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5038622A (en) * | 1989-12-22 | 1991-08-13 | Tijmann Willem B | Strain gage assembly for measuring excessive tensile strain of a flexible elongated member, such as a steel structural cable, or an electrical transmission cable, or a glass fiber optic communication cable, which may slightly twist under tensile strain |
| CN1727600A (en) * | 2004-07-26 | 2006-02-01 | 北京市建筑工程研究院 | Method for converting stretching ends with binding prestress to stretching ends without binding prestress |
| CN1807050A (en) * | 2006-01-26 | 2006-07-26 | 许宏元 | Prestressing system device of concrete structure and method for manufacturing the same |
| CN200962030Y (en) * | 2006-09-22 | 2007-10-17 | 宁波杉工结构监测与控制工程中心有限公司 | Non enhanced optical fiber grating reinforcing steel bar device |
| CN201266127Y (en) * | 2008-09-28 | 2009-07-01 | 中冶建筑研究总院有限公司 | Force value monitoring device for steel bundle with bonding pre-stress |
| US20120314540A1 (en) * | 2011-06-07 | 2012-12-13 | Alter Josef K | Hollow rebar for crosshole sonic logging access tubes and longitudinal concrete reinforcing in drilled shafts |
| CN203148608U (en) * | 2013-01-22 | 2013-08-21 | 沈阳建筑大学 | Steel rope gauge protection device for monitoring tensile stress of prestressed reinforcing bars |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339340A (en) * | 2018-10-25 | 2019-02-15 | 贵州理工学院 | A kind of external prestressing confined concrete filled tubular columns and its processing method |
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| CN103115709B (en) | 2016-05-18 |
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