CN111665280A - Post-tensioned prestressed duct internal slurry quality detection device and detection method thereof - Google Patents
Post-tensioned prestressed duct internal slurry quality detection device and detection method thereof Download PDFInfo
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- CN111665280A CN111665280A CN202010446436.9A CN202010446436A CN111665280A CN 111665280 A CN111665280 A CN 111665280A CN 202010446436 A CN202010446436 A CN 202010446436A CN 111665280 A CN111665280 A CN 111665280A
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Abstract
The invention discloses a slurry quality detection device in a post-tensioning prestressed duct and a detection method thereof, wherein the slurry quality detection device comprises corrugated pipes and a resistance detector, the end parts of the corrugated pipes are provided with two first connecting holes, a first metal ribbon is sleeved outside the corrugated pipe at the upper end of each first connecting hole and connected with a first conductive assembly, and the end part of the first conductive assembly is connected in the first connecting hole after penetrating through the first metal ribbon; the first conductive assembly comprises a first outer insulating sleeve and a first conductive copper pipe, the first conductive copper pipe is connected with a first conductive wire, and the first conductive wire is connected with the resistance detector through a resistance instrument connecting wire; the first outer insulating sleeve is filled with insulating cement, and the first conductive copper pipe is arranged in the insulating cement. The detection device can detect the concrete fullness more accurately. The slurry quality detection method can be used for conveniently detecting the compactness of the concrete, and is convenient and simple to operate.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a device and a method for detecting the quality of slurry in a post-tensioned pre-stressed duct.
Background
The corrugated pipes need to be laid inside the bridge in the bridge construction process, concrete needs to be poured inside the corrugated pipes to improve the bridge strength, the concrete filling degree inside the corrugated pipes directly influences the bridge quality, and no better detection method exists at present for the concrete filling degree inside the corrugated pipes. It is therefore highly desirable to develop a device for detecting the degree of concrete filling inside a corrugated pipe.
Disclosure of Invention
The invention aims to provide a device for detecting the quality of slurry in a post-tensioned pre-stressed duct, which can detect the concrete fullness more accurately and has better detection effect.
In order to achieve the purpose, the invention adopts the technical scheme that:
a device for detecting the quality of slurry in a post-tensioning method pre-stressed duct comprises corrugated pipes and a resistance detector, wherein two first connecting holes are formed in the end parts of the corrugated pipes, a first metal ribbon is sleeved outside the corrugated pipe at the upper end of each first connecting hole and connected with a first conductive assembly, and the end part of the first conductive assembly penetrates through the first metal ribbon and then is connected into the first connecting holes; the first conductive assembly comprises a first outer insulating sleeve and a first conductive copper pipe, the first conductive copper pipe is connected with a first conductive wire, and the first conductive wire is connected with the resistance detector through a resistance instrument connecting wire; the first outer insulating sleeve is filled with insulating cement, and the first conductive copper pipe is arranged in the insulating cement.
Preferably, the corrugated pipe comprises a wave crest pipe section and a wave trough pipe section, the wave crest pipe sections and the wave trough pipe sections are alternately connected to form the corrugated pipe, and the first connecting hole is formed in the wave trough pipe section; the first metal binding belt is sleeved on the wave trough pipe section.
Preferably, the first connecting hole is a round hole; at least one second connecting hole is formed in the corrugated pipe between the two first connecting holes, a second metal binding belt is sleeved outside the corrugated pipe at the upper end of each second connecting hole, and each second metal binding belt is connected with a second conductive assembly.
Preferably, the second connecting hole is formed in the wave crest pipe section or the wave trough pipe section, and the end of the second conductive assembly penetrates through the second metal binding belt and then is connected into the second connecting hole.
Preferably, the first outer insulating sleeve and the first conductive copper pipe are both in a conical tubular shape, and a plurality of first strip-shaped grooves are vertically formed in the inner wall of the first outer insulating sleeve.
Preferably, the upper end of the first metal binding tape is provided with a wire positioning shaft sleeve, and the lower part of the first conductive assembly can penetrate through the wire positioning shaft sleeve and the first metal binding tape.
Preferably, the second conductive assembly comprises a second outer insulating sleeve and a second conductive copper pipe, and the second conductive copper pipe is connected with a second conductive wire.
Another object of the present invention is to provide a method for detecting the quality of slurry.
In order to achieve the purpose, the invention adopts the technical scheme that:
a slurry quality detection method adopts the slurry quality detection device in the post-tensioning prestressed duct, and specifically comprises the following steps:
step one, providing a conductive copper pipe, an outer insulating sleeve, insulating glue and a pair of pliers, and removing the outer skin of the end part of the first conductive wire by using the pair of pliers to expose the conductive metal of the first conductive wire; putting the conductive metal of the first conductive wire into the narrow-end of the first conductive copper pipe, and then pinching the narrow-end of the first conductive copper pipe by using pliers so that the narrow-end of the first conductive copper pipe clamps the conductive metal of the first conductive wire;
filling insulating glue into the first outer insulating sleeve, and then putting the first conductive copper pipe into the insulating glue, so that the insulating glue completely coats the first conductive copper pipe and the conductive metal of the first conductive wire;
after the insulating glue is completely solidified, cutting off one end, which is not connected with the first conductive wire, of the first conductive copper pipe along the direction vertical to the axis to expose the cross section of the first conductive copper pipe, and then coating the connecting end of the first conductive copper pipe and the first conductive wire with waterproof adhesive tapes;
erecting a template structure of the prefabricated box girder, and erecting a steel bar net structure in the template structure; the corrugated pipe is provided with first connecting holes at two ends, and a second connecting hole is formed in the corrugated pipe between the two first connecting holes;
step five, bundling the first metal bundling belt and the second metal bundling belt on the corrugated pipe, and then installing the first conductive assembly on the first metal bundling belt and installing the second conductive assembly on the second metal bundling belt;
step six, binding the first conductive wire and the second conductive wire on the steel bar mesh structure through steel wires, exposing the first conductive wire and the second conductive wire from the end part of the steel bar mesh structure, and then pouring concrete of the bridge and grouting the corrugated pipe;
and seventhly, in the grouting process, connecting the first conductive wire or the second conductive wire by using a resistance detector, so that the resistance values of different parts in the corrugated pipe are measured, and judging the grouting state according to the resistance values.
Preferably, the distance between the first connecting hole and the port of the corrugated pipe is 20-40 cm; the distance between every two adjacent through holes is 190-210 cm.
The invention has the beneficial effects that:
among the thick liquid quality detection device in above-mentioned post-tensioned prestressing force pore canal, be provided with neotype conductive component, conductive component passes through the metal ribbon location, and conductive component's connection is more firm reliable. In the invention, the metal cable tie and the electric wire positioning shaft sleeve are matched for use, so that the conductive assembly and the conductive wire are firmly positioned. The corrugated pipe is provided with a first connecting hole and a second connecting hole for detecting different parts, and each connecting hole is provided with a conductive component. Through resistance detector's use, can detect the resistance at different positions to whether fill into concrete mortar in the bellows at detectable corresponding position, and through the use of conductive component and metal ribbon, detection device's connection is more firm, has avoided check out test set to empty and damage and can't carry out normal detection achievement's condition and has taken place.
According to the slurry quality detection method, on the basis of resistance detection, the convenience degree and the accuracy of detection are improved, in addition, in the detection construction method, the damage of detection equipment is avoided, the detection quality and the success rate of detection are improved, the overall detection efficiency is improved, and the problem that normal detection cannot be carried out due to the damage of the detection equipment is avoided. The detection method is novel, high in innovativeness and high in practicability.
Drawings
In order to clearly illustrate the embodiments or technical solutions of the present invention in the prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a slurry quality detection device in a post-tensioned pre-stressed duct.
Fig. 2 is a schematic view of the overall structure of the bellows.
Fig. 3 is a schematic view of a connection structure of the first conductive member and the bellows.
FIG. 4 is a schematic view of the connection of the first metal strap and the first conductive assembly.
Fig. 5 is a schematic view of the overall structure of the first conductive member.
Fig. 6 is an isometric illustration of a first conductive assembly.
Detailed Description
The invention provides a device and a method for detecting the quality of slurry in a post-tensioned pre-stressed duct, and the invention is further explained in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention is described in detail below with reference to the accompanying drawings:
example 1
Referring to fig. 1 to 6, the device for detecting the slurry quality in the post-tensioned pre-stressed duct comprises a corrugated pipe 1 and a resistance detector 2, wherein two first connection holes 11 are formed in the end portion of the corrugated pipe 1, and the two first connection holes 11 are respectively formed in the left end portion and the right end portion of the corrugated pipe 1.
The corrugated pipe 1 at the upper end of each first connecting hole 11 is sleeved with a first metal binding belt 3, the first metal binding belt 3 is connected with a first conductive assembly 4, and the end part of the first conductive assembly 4 passes through the first metal binding belt 3 and then is connected in the first connecting hole 11.
The first conductive assembly 4 comprises a first outer insulating sleeve 41 and a first conductive copper pipe 42, the first conductive copper pipe 42 is connected with a first conductive wire 43, and the first conductive wire 43 is connected with the resistance detector 2 through a resistance meter connecting wire 44. The first outer insulating sleeve 41 is filled with insulating glue 45, and the first conductive copper tube 42 is arranged in the insulating glue 45.
The corrugated pipe 1 comprises a crest pipe section 12 and a trough pipe section 13, a plurality of crest pipe sections 12 and a plurality of trough pipe sections 13 are alternately connected to form the corrugated pipe 1, and a first connecting hole 11 is formed in the trough pipe sections; the first metal ribbon 3 is sleeved on the trough pipe section 13.
The first connecting holes 11 are round holes, and the number of the first connecting holes 11 is two; at least one second connecting hole 14 is formed in the corrugated pipe 1 between the two first connecting holes 11, a second metal binding tape 15 is sleeved outside the corrugated pipe 1 at the upper end of each second connecting hole 14, and each second metal binding tape 15 is connected with a second conductive assembly 16. The first metal band 3 and the second metal band 15 are both metal bands of the prior art. The number of the first metal binding tapes 3 is two, the upper end of the first metal binding tape 3 is provided with a wire positioning sleeve 31, and the lower part of the first conductive assembly 4 can penetrate through the wire positioning sleeve 31 and the first metal binding tapes 3.
A second connection hole 14 is formed in the peak section 12 or the valley section 13, and the end of the second conductive member 16 is connected to the second connection hole 14 after passing through the second metal tie 15.
First outer insulating cover 41 and first contact tube 42 all are the toper tubulose, and a plurality of first bar grooves 411 have been seted up on the inner wall of first outer insulating cover 41 vertically, and a plurality of first bar grooves 411 are vertical parallel arrangement, and the purpose of seting up first bar groove 411 is in order to make better the adhering to in first outer insulating cover 41 of insulating cement. The second conductive assembly 16 comprises a second external insulating sleeve and a second conductive copper pipe, a second conductive wire is connected to the second conductive copper pipe, and the connection structure of the second conductive assembly 16 is the same as that of the first conductive assembly 4.
Among the thick liquid quality detection device in above-mentioned post-tensioned prestressing force pore canal, be provided with neotype conductive component, conductive component passes through the metal ribbon location, and conductive component's connection is more firm reliable. In the concrete pouring process, although the conductive head in the prior art is in interference fit with the corrugated pipe hole, the conductive head is still easy to knock down during the mortar pouring process due to different levels of pouring mortar of workers. In the invention, the metal cable tie and the electric wire positioning shaft sleeve are matched for use, so that the conductive assembly and the conductive wire are firmly positioned. The corrugated pipe is provided with a first connecting hole and a second connecting hole for detecting different parts, and each connecting hole is provided with a conductive component. Through resistance detector's use, can detect the resistance at different positions to whether fill into concrete mortar in the bellows at detectable corresponding position, and through the use of conductive component and metal ribbon, detection device's connection is more firm, has avoided check out test set to empty and damage and can't carry out normal detection achievement's condition and has taken place.
Example 2
A slurry quality detection method adopts the slurry quality detection device in the post-tensioning prestressed duct, and specifically comprises the following steps:
step one, providing a conductive copper pipe, an outer insulating sleeve, an insulating adhesive and a pair of pliers, and removing the outer skin of the end part of the first conductive wire 43 by using the pair of pliers to expose the conductive metal of the first conductive wire 43; the conductive metal in the first conductive wire 43 is put into the narrow-end of the first conductive copper pipe 42, and then the narrow-end of the first conductive copper pipe 42 is pinched flat by using pliers, so that the narrow-end of the first conductive copper pipe clamps the conductive metal of the first conductive wire. The first conductive copper tube 42 is in a tapered tubular shape, and the conductive metal of the first conductive wire can be better clamped after being pinched flat.
Step two, filling the insulating glue into the first outer insulating sleeve 41, and then putting the first conductive copper tube 42 into the insulating glue, so that the insulating glue completely covers the conductive metals of the first conductive copper tube 42 and the first conductive wire 43, and at this time, both the inner end and the outer end of the first conductive copper tube 42 are covered by the insulating glue.
And step three, after the insulating glue is completely solidified, cutting off one end, which is not connected with the first conductive wire 43, of the first conductive copper pipe 42 along the direction vertical to the axis to expose the cross section of the first conductive copper pipe 42, and then coating the connecting end of the first conductive copper pipe and the first conductive wire with waterproof adhesive tape.
Erecting a template structure 5 of the prefabricated box girder, and arranging a steel bar net structure 51 in the template structure 5; first connection holes 11 are opened at both ends of the corrugated tube 1, and second connection holes 14 are opened on the corrugated tube 1 between the two first connection holes 11. The distance between the first connecting hole and the port of the corrugated pipe is 20-40 cm. The distance between every two adjacent through holes is 190-210 cm.
Step five, first metal strap 3 and second metal strap 15 are strapped to corrugated tube 1, and then first conductive assembly 4 is mounted on first metal strap 3 and second conductive assembly 16 is mounted on second metal strap 15.
Step six, binding the first conductive wire 42 and the second conductive wire on the steel mesh structure 51 through steel wires, wherein the first conductive wire and the second conductive wire are both exposed out of the end part of the steel mesh structure 51, and then performing pouring concrete of the bridge and grouting of the corrugated pipe;
and seventhly, in the grouting process, the resistance detector 2 is connected with the first conductive wire or the second conductive wire, one end of the resistance detector 2 is connected with the first conductive wire, and the other end of the resistance detector 2 can be connected with the other first conductive wire or one of the second conductive wires, so that the resistance values of different parts in the corrugated pipe are measured, and the grouting state is judged according to the resistance values. The resistance value of the solidified grouting material measured by the resistance detector is in the range of 60 kilo-ohms to 120 kilo-ohms.
Example 3
According to the slurry quality detection method, the conductive copper pipe, the outer insulating sleeve and the insulating glue are used, so that the accuracy of conductivity of the manufactured conductive assembly can be better improved, and the conductive assembly is prevented from being influenced by external concrete mortar. In the detection process, the head of the conductive component can be cut off as required, the cross section of the conductive copper pipe is exposed after cutting off, and the conductive copper pipe is completely covered by the insulating glue inside and outside in the machining process, so that the conductive copper pipe conducts electricity only through the exposed cross section.
When concrete mortar is not filled in the corrugated pipe, the resistance detected by the resistance detector is infinite due to the contact of the conductive copper pipe and air; when the conductive copper pipe is contacted with the concrete mortar, the resistance detected by the resistance detector is 60-120 kilohms. And detecting the resistance range in the corresponding corrugated pipe through the change of the resistance value.
According to the slurry quality detection method, on the basis of resistance detection, the convenience degree and the accuracy of detection are improved, in addition, in the detection construction method, the damage of detection equipment is avoided, the detection quality and the success rate of detection are improved, the overall detection efficiency is improved, and the problem that normal detection cannot be carried out due to the damage of the detection equipment is avoided. The detection method is novel, high in innovativeness and high in practicability.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Parts which are not described in the invention can be realized by adopting or referring to the prior art.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (9)
1. The device for detecting the quality of the grout in the post-tensioning method pre-stressed duct comprises a corrugated pipe and a resistance detector, and is characterized in that two first connecting holes are formed in the end part of the corrugated pipe, a first metal ribbon is sleeved outside the corrugated pipe at the upper end of each first connecting hole and connected with a first conductive assembly, and the end part of the first conductive assembly penetrates through the first metal ribbon and then is connected into the first connecting holes; the first conductive assembly comprises a first outer insulating sleeve and a first conductive copper pipe, the first conductive copper pipe is connected with a first conductive wire, and the first conductive wire is connected with the resistance detector through a resistance instrument connecting wire; the first outer insulating sleeve is filled with insulating cement, and the first conductive copper pipe is arranged in the insulating cement.
2. The apparatus for testing the quality of slurry in a post-tensioned pre-stressed duct according to claim 1, wherein the corrugated tube comprises a plurality of wave crest tube segments and a plurality of wave trough tube segments, the plurality of wave crest tube segments and the plurality of wave trough tube segments are alternately connected to form a corrugated tube, and the first connection hole is formed in the wave trough tube segments; the first metal binding belt is sleeved on the wave trough pipe section.
3. The apparatus for testing slurry quality in a post-tensioned pre-stressed duct according to claim 2, wherein the first connecting hole is a circular hole; at least one second connecting hole is formed in the corrugated pipe between the two first connecting holes, a second metal binding belt is sleeved outside the corrugated pipe at the upper end of each second connecting hole, and each second metal binding belt is connected with a second conductive assembly.
4. The apparatus for testing the quality of slurry in a post-tensioned pre-stressed duct according to claim 3, wherein the second connecting hole is formed in the wave crest pipe section or the wave trough pipe section, and the end of the second conductive member is connected to the second connecting hole after passing through the second metal tie.
5. The apparatus according to claim 1, wherein the first outer insulating sleeve and the first copper conducting tube are both in a tapered tubular shape, and a plurality of first strip-shaped grooves are vertically formed in an inner wall of the first outer insulating sleeve.
6. The apparatus for testing the quality of grout inside a post-tensioned pre-stressed duct of claim 1, wherein the first metal cable tie is provided with a wire positioning sleeve at the upper end thereof, and the first conductive assembly is provided at the lower end thereof with a wire positioning sleeve and the first metal cable tie.
7. The apparatus according to claim 3, wherein the second conductive assembly comprises a second outer insulating sleeve and a second conductive copper pipe, and the second conductive copper pipe is connected with a second conductive wire.
8. A slurry quality detection method, characterized in that, the slurry quality detection device in the post-tensioned pre-stressed duct of any one of claims 1 to 7 is adopted, and the method comprises the following steps:
step one, providing a conductive copper pipe, an outer insulating sleeve, insulating glue and a pair of pliers, and removing the outer skin of the end part of the first conductive wire by using the pair of pliers to expose the conductive metal of the first conductive wire; putting the conductive metal of the first conductive wire into the narrow-end of the first conductive copper pipe, and then pinching the narrow-end of the first conductive copper pipe by using pliers so that the narrow-end of the first conductive copper pipe clamps the conductive metal of the first conductive wire;
filling insulating glue into the first outer insulating sleeve, and then putting the first conductive copper pipe into the insulating glue, so that the insulating glue completely coats the first conductive copper pipe and the conductive metal of the first conductive wire;
after the insulating glue is completely solidified, cutting off one end, which is not connected with the first conductive wire, of the first conductive copper pipe along the direction vertical to the axis to expose the cross section of the first conductive copper pipe, and then coating the connecting end of the first conductive copper pipe and the first conductive wire with waterproof adhesive tapes;
erecting a template structure of the prefabricated box girder, and erecting a steel bar net structure in the template structure; the corrugated pipe is provided with first connecting holes at two ends, and a second connecting hole is formed in the corrugated pipe between the two first connecting holes;
step five, bundling the first metal bundling belt and the second metal bundling belt on the corrugated pipe, and then installing the first conductive assembly on the first metal bundling belt and installing the second conductive assembly on the second metal bundling belt;
step six, binding the first conductive wire and the second conductive wire on the steel bar mesh structure through steel wires, exposing the first conductive wire and the second conductive wire from the end part of the steel bar mesh structure, and then pouring concrete of the bridge and grouting the corrugated pipe;
and seventhly, in the grouting process, connecting the first conductive wire or the second conductive wire by using a resistance detector, so that the resistance values of different parts in the corrugated pipe are measured, and judging the grouting state according to the resistance values.
9. The slurry quality detection method according to claim 1, wherein the distance between the first connection hole and the port of the corrugated pipe is 20 cm to 40 cm; the distance between every two adjacent through holes is 190-210 cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010446436.9A CN111665280A (en) | 2020-05-25 | 2020-05-25 | Post-tensioned prestressed duct internal slurry quality detection device and detection method thereof |
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| CN202010446436.9A CN111665280A (en) | 2020-05-25 | 2020-05-25 | Post-tensioned prestressed duct internal slurry quality detection device and detection method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820361A (en) * | 2021-07-06 | 2021-12-21 | 清华大学 | Intelligent sensing monitoring method and monitoring instrument for compactness of rockfill concrete dam |
| CN115598007A (en) * | 2022-10-27 | 2023-01-13 | 中钢集团郑州金属制品研究院股份有限公司（Cn） | Prestressed corrugated pipe grouting quality detection device and detection method |
-
2020
- 2020-05-25 CN CN202010446436.9A patent/CN111665280A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820361A (en) * | 2021-07-06 | 2021-12-21 | 清华大学 | Intelligent sensing monitoring method and monitoring instrument for compactness of rockfill concrete dam |
| CN115598007A (en) * | 2022-10-27 | 2023-01-13 | 中钢集团郑州金属制品研究院股份有限公司（Cn） | Prestressed corrugated pipe grouting quality detection device and detection method |
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