CN110779959A - Prestressed duct grouting compactness detection device and detection method - Google Patents
Prestressed duct grouting compactness detection device and detection method Download PDFInfo
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- CN110779959A CN110779959A CN201911041262.1A CN201911041262A CN110779959A CN 110779959 A CN110779959 A CN 110779959A CN 201911041262 A CN201911041262 A CN 201911041262A CN 110779959 A CN110779959 A CN 110779959A
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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Abstract
The invention discloses a prestressed duct grouting compactness detection device which comprises a duct corrugated pipe and a resistance detector, wherein the end part of the duct corrugated pipe is provided with a first mounting hole group, each mounting hole group comprises two first mounting holes, and each first mounting hole is connected with a test lead; and the two test leads are connected with the resistance detector. The test wire comprises a detection part, the rear end of the detection part is sequentially connected with a pre-embedded part and an exposed part, the detection part is composed of a conductive head and an insulating support block coated at the outer end of the upper part of the conductive head, the conductive head can be inserted into a first mounting hole, and the lower part of the insulating support block can be in interference fit with the first mounting hole. The device detects more accurately after the installation. The invention also discloses a method for detecting the grouting compactness of the prestressed duct, which can detect the grouting compactness of the prestressed duct more conveniently and accurately.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a prestressed duct grouting compactness detection device and a detection method.
Background
The prestressed duct grouting compactness directly affects the durability and safety of a prestressed concrete bridge, even serious accidents such as potential safety hazards and bridge crossing can be caused, but even today with advanced technology and mature technology, the grouting quality can not be ensured in many times, so the compactness detection after grouting is very necessary, for a long time, research institutes develop various methods which can be roughly divided into four methods such as a radiation method, an electromagnetic wave method, an ultrasonic wave method and an impact elastic wave method, the radiation method has high precision but complex equipment, the detection cost is high, and the large-range detection is difficult; the electromagnetic method is greatly influenced by the steel bars, is insensitive to defects and has low test precision, so that the engineering requirements cannot be met; although the ultrasonic method and the ballistic wave method can theoretically detect the grouting compactness, there is no brief, reliable and practical nondestructive testing technique and device for the grouting compactness.
Disclosure of Invention
The invention aims to provide a prestressed duct grouting compactness detection device which can detect the grouting compactness in a prestressed duct more accurately.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a closely knit degree detection device of prestressed duct mud jacking, includes duct bellows and resistance detector, first installation punch combination has been seted up on the outer wall of the tip of duct bellows, and including two mutual parallel arrangement's first mounting hole in every group installation punch combination, even there is a test wire in every first mounting hole, and two test wires all are connected with resistance detector.
Preferably, the test lead comprises a detection part, and the rear end of the detection part is sequentially connected with an embedded part and an exposed part; the detection part consists of a conductive head and an insulating supporting block connected to the outer end of the upper part of the conductive head, the conductive head can be inserted into the first mounting hole, and the lower part of the insulating supporting block can be in interference fit in the first mounting hole.
Preferably, the embedded part comprises a first conductive wire, the outer portion of the first conductive wire is coated with a waterproof adhesive tape, and the embedded part can be embedded in the concrete bridge.
Preferably, the exposed part comprises a second lead, the end of the second lead is connected with a measuring instrument connector, and the measuring instrument connector is connected with the resistance detector.
Preferably, the first mounting holes are grouped into one group or two groups; the corrugated pipe of the pore canal is in a circular pipe shape and comprises a wave crest pipe section and a wave trough pipe section, and the first mounting hole group is arranged on the wave crest pipe section; two first mounting holes in each group of first mounting holes are transversely arranged in parallel.
Preferably, the conductive head is conductive metal, the overall length value of the conductive head is 8 mm-10 mm, and the exposed length of the conductive head is 4 mm-5 mm.
Preferably, the concrete bridge comprises a bridge steel bar frame, the inner end and the outer end of the bridge steel bar frame are both filled with concrete layers, and the pore corrugated pipe is arranged in the concrete layer on the inner side of the bridge steel bar frame.
Preferably, the insulating support block comprises an upper clamping block part and a lower plugging block part, the upper clamping block part is clamped at the upper end of the first mounting hole, and the lower plugging block part can be in interference fit in the first mounting hole;
the lower end surface of the upper clamping block part is matched with the profile surface of a wave crest pipe section of the corrugated pipe of the pore passage; and a double-sided adhesive layer is adhered to the lower end face of the upper clamping block part.
The invention also aims to provide a method for detecting the grouting compactness of the prestressed duct, which can detect the grouting compactness of the prestressed duct more conveniently and more accurately.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for detecting the grouting compactness of the prestressed duct adopts the device for detecting the grouting compactness of the prestressed duct, and specifically comprises the following steps:
firstly, erecting a template structure of a concrete bridge, simultaneously arranging a first mounting hole group on a pore corrugated pipe, mounting a detection part of a test lead on the pore corrugated pipe, and then mounting a bridge reinforcing steel bar frame and the pore corrugated pipe in the template structure;
fixing the embedded part of the test lead to the pore corrugated pipe or the bridge reinforcing steel bar frame by using a binding wire, forming a fine groove at the splicing position of the template structure close to the periphery of the outlet of the pore corrugated pipe, and exposing the exposed part of the test lead from the fine groove;
thirdly, carrying out processes of concrete pouring, grouting, formwork removal and the like on the concrete bridge, paying attention to the exposed part when the formwork is removed, preventing the lead of the exposed part from being pulled apart, and waiting for 24-36 hours;
and step four, setting the resistance value range of the solidified grouting material in the resistance detector, connecting the exposed part of the lead with the resistance detector to detect the resistance value after the grouting material is stably solidified, and judging the grouting compactness of the monitoring point according to the detected resistance value.
Preferably, the resistance value of the set paste in the resistance detector is in the range of 60 kilohms to 120 kilohms.
The invention has the beneficial effects that:
above-mentioned prestressed duct mud jacking compactness detection device sets up two neotype test wires, can carry out effective and convenient detection to prestressed duct mud jacking's compactness. The first mounting hole group is formed in the corrugated pipe with the hole channel, and the testing lead is mounted more stably through the novel detection part. The first mounting hole group is arranged at the wave crest pipe section, so that the wave trough end is avoided, and concrete mortar can be ensured to be filled in the wave crest pipe section of the corrugated pipe of the duct, and more accurate detection is carried out on the concrete mortar filled in the corrugated pipe of the duct. According to the method for detecting the grouting compactness of the prestressed duct, the device for detecting the grouting compactness of the prestressed duct is used, so that the overall detection convenience is improved, and the detection accuracy is improved.
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 connection structure of the bridge steel bar frame, the tunnel corrugated pipe and the test lead.
Fig. 2 is a schematic view of the connection structure of the formwork structure and the bridge reinforcing frame.
Fig. 3 is a partial schematic view of a bridge tendon support, tunnel bellows, and test lead connection.
Fig. 4 is a schematic view of a tunnel bellows and test lead connection.
Fig. 5 is a schematic view of the overall structure of the port bellows.
Fig. 6 is a schematic view of the overall structure of the test lead.
Detailed Description
The invention provides a prestressed duct grouting compactness detection device and a detection method, and the invention is further described 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
With reference to fig. 1 to 6, a prestressed duct grouting compactness detecting device includes a duct corrugated pipe 1 and a resistance detector. The end of the tunnel corrugated pipe 1 is provided with a first mounting hole group 2, and each mounting hole group 2 comprises two first mounting holes 21. Each first mounting hole 21 is internally provided with one test lead 3, and the two test leads 3 are connected with the resistance detector.
The test wire 3 comprises a detection part 31, the rear end of the detection part 31 is sequentially connected with an embedded part 32 and an exposed part 33, the detection part 31 is composed of a conductive head 34 and an insulating supporting block 35 connected to the outer end of the upper part of the conductive head 34, the conductive head 34 can be inserted into the first mounting hole 21, and the lower part of the insulating supporting block 35 is in interference fit with the first mounting hole 21.
The embedded part 32 comprises a first conductive wire 321, the exterior of the first conductive wire 321 is coated with a waterproof adhesive tape 322, and the embedded part 32 is embedded in the concrete bridge. The exposed portion 33 includes a second conductive wire 331, an end of the second conductive wire 331 is connected to a measuring instrument connector 332, and the measuring instrument connector 332 is connected to the resistance measuring instrument.
One or two sets of first mounting holes 2 may be provided in each test conductor 3. The corrugated pipe 1 is in a circular pipe shape, the corrugated pipe 1 comprises a wave crest pipe section 11 and a wave trough pipe section 12, the wave crest pipe sections 11 and the wave trough pipe sections 12 are alternately connected to form the corrugated pipe, and the corrugated pipe 1 is of an integrally formed structure. The first mounting hole group 2 is arranged on the wave crest pipe section 11; the two first mounting holes 21 in each first mounting hole group 2 are arranged in parallel in the lateral direction.
The conductive head 24 is made of conductive metal, the overall length of the conductive head 24 is 8 mm-10 mm, the exposed length of the conductive head 24 is 4 mm-5 mm, and the exposed part of the conductive head 24 is used for conducting electricity. The concrete bridge comprises a bridge reinforcing steel bar frame 4, wherein concrete layers are filled at the inner end and the outer end of the bridge reinforcing steel bar frame 4, and the pore corrugated pipe 1 is arranged in the concrete layer on the inner side of the bridge reinforcing steel bar frame 4.
The insulating supporting block 35 comprises an upper clamping block part 351 and a lower plugging block part 352, the upper clamping block part 351 is clamped at the upper end of the first mounting hole, and the lower plugging block part can be in interference fit in the first mounting hole. The lower end surface of the upper clamping block part 351 is matched with the upper profile surface of the wave crest pipe section 11 of the pore corrugated pipe 1; go up the adhesion on the lower terminal surface of screens piece 351 portion and have two-sided glue film, during the insulating supporting shoe 35 of installation, the fastness after the multiplicable installation of two-sided glue film.
Example 2
With reference to fig. 1 to 6, a method for detecting the grouting compactness of a prestressed duct, which uses the device for detecting the grouting compactness of the prestressed duct, specifically includes the following steps:
firstly, erecting a template structure 5 of a concrete bridge, simultaneously arranging a first mounting hole group on a tunnel corrugated pipe 1, then mounting a detection part 31 of a test lead 3 into a first mounting hole 21 on the tunnel corrugated pipe 1, and then mounting a bridge reinforcing steel bar frame 4 and the tunnel corrugated pipe 1 in the template structure 5.
And step two, fixing the embedded part 32 of the test lead 3 on the corrugated tunnel pipe 1 or the bridge steel bar frame 4 by using a binding wire, forming a narrow groove 51 at the splicing position of the template structure 5 close to the periphery of the outlet of the corrugated tunnel pipe 1, and exposing the exposed part 33 of the test lead 3 from the narrow groove 51.
And step three, carrying out processes of concrete pouring, grouting, form removal and the like on the concrete bridge, paying attention to the exposed part 33 of the test lead 3 when the form is removed, preventing the lead of the exposed part 33 of the test lead 3 from being pulled apart, and waiting for 24-36 hours.
And step four, waiting for 24 hours to 36 hours, setting the resistance value range of the solidified grouting material in the resistance detector, wherein the resistance value range of the grouting material can be set in advance. After the grouting is solidified stably, the exposed part 33 of the test lead 3 is connected with a resistance detector to detect the resistance value of the grouting material, and the grouting compactness of the monitoring point is judged according to the detected resistance value.
The resistance value range of the solidified pressure paste in the resistance detector is 60 kilo-ohms to 120 kilo-ohms, the resistance value of ordinary water or mixed with certain mortar is about 20 kilo-ohms to 30 kilo-ohms, and when the two test leads 3 are not connected, the range of the measured resistance value is 500 kilo-ohms to infinity.
Above-mentioned prestressed duct mud jacking compactness detection device sets up two neotype test wire 3, can carry out effective and convenient detection to prestressed duct mud jacking's compactness. The first mounting hole group 2 is arranged on the pore corrugated pipe 1, and the test lead 3 is mounted more stably through the novel detection part 31. The first mounting hole group 2 is arranged at the crest pipe section 11, so that the trough end position is avoided, and the concrete mortar filled in the pore corrugated pipe 1 can be more accurately detected after the crest pipe section 11 of the pore corrugated pipe 1 is filled with the concrete mortar. According to the method for detecting the grouting compactness of the prestressed duct, the device for detecting the grouting compactness of the prestressed duct is used, so that the overall detection convenience is improved, and the detection accuracy is improved.
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.
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 (10)
1. The utility model provides a closely knit degree detection device of prestressed duct mud jacking, includes duct bellows and resistance detector, its characterized in that, set up first installation punch combination on the outer wall of the tip of duct bellows, including two mutual parallel arrangement's first mounting hole in every group installation punch combination, even there is a test wire in every first mounting hole, and two test wires all are connected with resistance detector.
2. The prestressed duct grouting compactness detecting device according to claim 1, wherein the test wire comprises a detecting portion, and a pre-buried portion and an exposed portion are sequentially connected to the rear end of the detecting portion; the detection part consists of a conductive head and an insulating supporting block connected to the outer end of the upper part of the conductive head, the conductive head can be inserted into the first mounting hole, and the lower part of the insulating supporting block can be in interference fit in the first mounting hole.
3. The device for detecting the grouting compactness of the prestressed duct according to claim 2, wherein the pre-buried portion comprises a first conductive wire, a waterproof tape is coated outside the first conductive wire, and the pre-buried portion can be pre-buried in a concrete bridge.
4. The prestressed duct grouting compactness detecting device according to claim 2, wherein the exposed portion comprises a second lead, an end of the second lead is connected with a measuring instrument connector, and the measuring instrument connector is connected with the resistance detector.
5. The prestressed duct grouting compactness detecting device according to claim 2, wherein the first mounting holes are grouped into one or two groups; the corrugated pipe of the pore canal is in a circular pipe shape and comprises a wave crest pipe section and a wave trough pipe section, and the first mounting hole group is arranged on the wave crest pipe section; two first mounting holes in each group of first mounting holes are transversely arranged in parallel.
6. The apparatus according to claim 2, wherein the conductive head is a conductive metal, the length of the whole conductive head is 8 mm-10 mm, and the exposed length of the conductive head is 4 mm-5 mm.
7. The apparatus of claim 1, wherein the concrete bridge comprises a bridge steel bar frame, the inner end and the outer end of the bridge steel bar frame are filled with concrete layers, and the duct corrugated pipe is disposed in the concrete layer inside the bridge steel bar frame.
8. The prestressed duct grouting compactness detecting device according to claim 5, wherein the insulating support block comprises an upper clamping block portion and a lower plugging block portion, the upper clamping block portion is clamped at the upper end of the first mounting hole, and the lower plugging block portion can be in interference fit in the first mounting hole;
the lower end surface of the upper clamping block part is matched with the profile surface of a wave crest pipe section of the corrugated pipe of the pore passage; and a double-sided adhesive layer is adhered to the lower end face of the upper clamping block part.
9. A prestressed duct grouting compactness detection method is characterized in that the prestressed duct grouting compactness detection device of any one of claims 1 to 8 is adopted, and the method specifically comprises the following steps:
firstly, erecting a template structure of a concrete bridge, simultaneously arranging a first mounting hole group on a pore corrugated pipe, mounting a detection part of a test lead on the pore corrugated pipe, and then mounting a bridge reinforcing steel bar frame and the pore corrugated pipe in the template structure;
fixing the embedded part of the test lead to the pore corrugated pipe or the bridge reinforcing steel bar frame by using a binding wire, forming a fine groove at the splicing position of the template structure close to the periphery of the outlet of the pore corrugated pipe, and exposing the exposed part of the test lead from the fine groove;
thirdly, carrying out processes of concrete pouring, grouting, formwork removal and the like on the concrete bridge, paying attention to the exposed part when the formwork is removed, preventing the lead of the exposed part from being pulled apart, and waiting for 24-36 hours;
and step four, setting the resistance value range of the solidified grouting material in the resistance detector, connecting the exposed part of the lead with the resistance detector to detect the resistance value after the grouting material is stably solidified, and judging the grouting compactness of the monitoring point according to the detected resistance value.
10. The method for detecting the grouting compactness of the prestressed duct according to claim 1, wherein the resistance value of the solidified grouting material in the resistance detector is in a range of 60 kilohms to 120 kilohms.
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| CN201911041262.1A CN110779959A (en) | 2019-10-30 | 2019-10-30 | Prestressed duct grouting compactness detection device and detection method |
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| CN201911041262.1A CN110779959A (en) | 2019-10-30 | 2019-10-30 | Prestressed duct grouting compactness detection device and detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878207A (en) * | 2021-03-19 | 2021-06-01 | 中建八局第二建设有限公司 | Method for controlling grouting quality of back seal concrete of large-span swivel bridge swivel system |
| CN114046821A (en) * | 2021-11-10 | 2022-02-15 | 山东高速股份有限公司 | Prestressed beam grouting monitoring device and monitoring process |
| CN114922174A (en) * | 2022-06-02 | 2022-08-19 | 包钢勘察测绘研究院 | Prestressed anchor cable for detecting underwater coagulation and hardening process of anchoring body and detection method |
-
2019
- 2019-10-30 CN CN201911041262.1A patent/CN110779959A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878207A (en) * | 2021-03-19 | 2021-06-01 | 中建八局第二建设有限公司 | Method for controlling grouting quality of back seal concrete of large-span swivel bridge swivel system |
| CN114046821A (en) * | 2021-11-10 | 2022-02-15 | 山东高速股份有限公司 | Prestressed beam grouting monitoring device and monitoring process |
| CN114046821B (en) * | 2021-11-10 | 2023-06-02 | 山东高速股份有限公司 | Prestressed beam grouting monitoring device and monitoring technology |
| CN114922174A (en) * | 2022-06-02 | 2022-08-19 | 包钢勘察测绘研究院 | Prestressed anchor cable for detecting underwater coagulation and hardening process of anchoring body and detection method |
| CN114922174B (en) * | 2022-06-02 | 2023-12-29 | 包钢勘察测绘研究院 | Prestressed anchor cable for detecting underwater condensation hardening process of anchoring body and detection method |
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