CN218766725U - Device for testing frost heaving stress of prestressed duct grouting material - Google Patents
Device for testing frost heaving stress of prestressed duct grouting material Download PDFInfo
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- CN218766725U CN218766725U CN202222599391.6U CN202222599391U CN218766725U CN 218766725 U CN218766725 U CN 218766725U CN 202222599391 U CN202222599391 U CN 202222599391U CN 218766725 U CN218766725 U CN 218766725U
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Abstract
The utility model discloses a testing device for frost heaving stress of grouting material, which comprises a material storage component, a testing component and a temperature regulation and control component, wherein the testing component and the temperature regulation and control component are sleeved in the material storage component; the storage assembly comprises a storage barrel, the test assembly comprises a plurality of groups of sensor units and isolating bodies used for isolating the pressure slurry from the sensor units, the isolating bodies are sleeved in the storage barrel, and the sensor units used for testing the frost heaving stress of the pressure slurry in the storage barrel are arranged between the isolating bodies and the storage barrel. The utility model discloses can the frost heaving stress that the thick liquids produced is pressed in bleeding in the quantitative determination bridge prestressed pipe, temperature control and stress test are accomplished, need not artifical record by the collector is automatic, and test operation is simpler, the result is more accurate.
Description
Technical Field
The utility model belongs to the technical field of stress test, concretely relates to prestressed duct grouting material frost heaving stress's testing arrangement.
Background
The prestressed duct grouting material is used as a pouring material of a prestressed reinforcement duct of a post-tensioned prestressed bridge, is the only contact material of the prestressed reinforcement, is poured into the prestressed reinforcement duct, is hydrated and solidified, and then is used for isolating the prestressed reinforcement from being directly contacted with air and water, protecting the prestressed reinforcement from environmental corrosion, and filling and reinforcing the defects of the bridge.
In a normal temperature environment, the qualified prestressed duct grouting material is poured into a steel bar duct and can be solidified and hardened within 5-24 h, an effective coating effect is formed on prestressed steel bars, prestressed duct gaps are densely filled, and prestressed reinforcement corrosion is effectively prevented; however, due to the difference of construction environments in bridge construction, a low-temperature or negative-temperature environment may occur after grouting construction of partial areas, so that bleeding occurs due to the fact that the setting time of the grout in the pore channel is prolonged, and the bleeding inside the prestressed pipeline in an integrally sealed state after grouting exists for a long time, so that the risk of freezing and cracking of the prestressed bridge in winter is remarkably increased.
How to quickly, effectively and quantitatively evaluate the risk of the bridge frozen expansion crack caused by the bleeding of the prestressed duct grouting material and how to determine the limit of the natural environment which the grouting material can bear is a difficult point for the engineering construction of the prestressed bridge.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at providing a pressure thick liquids frost heaving stress's testing arrangement.
In order to realize the task, the utility model discloses a following technical scheme:
the device for testing frost heaving stress of the grouting material comprises a material storage component, a testing component and a temperature regulation and control component, wherein the testing component and the temperature regulation and control component are sleeved in the material storage component;
the storage assembly comprises a storage barrel, the testing assembly comprises a plurality of groups of sensor units and isolating bodies used for isolating the pressure slurry from the sensor units, the isolating bodies are sleeved in the storage barrel, and the sensor units used for testing the frost heaving stress of the pressure slurry in the storage barrel are arranged between the isolating bodies and the storage barrel.
Furthermore, the number of the sensor units is three, each group of sensor units comprises a first sensor for measuring stress and a second sensor for measuring temperature, the first sensor is annularly arranged on the inner wall of the storage cylinder, and the inner wall of the storage cylinder is also provided with the second sensor.
Further, the storage assembly further comprises a first support used for placing the storage cylinder in the temperature regulation and control assembly.
Furthermore, a first sealing cover and a second sealing cover are arranged at two ends of the first support, and the first sealing cover, the second sealing cover and the storage cylinder are fixed in a sealing mode through fastening screws.
Specifically, an included angle is arranged between the axis of the storage cylinder and the horizontal line.
Furthermore, the test assembly further comprises a collector, and a transmission line is connected between the collector and the sensor unit.
Further, the temperature regulation and control subassembly includes the control box, sets up in the control box and places the second support of storage cylinder.
Specifically, the number of the second supports is at least two, and the top of the second supports is provided with a concave part matched with the storage cylinder.
Further, a third sensor for detecting the ambient temperature is arranged in the control box.
Specifically, a temperature controller is arranged on the control box.
Compared with the prior art, the utility model following technological effect has:
the device of the utility model can quantitatively measure frost heaving stress generated by bleeding pressure slurry in the bridge prestressed pipeline, can visually observe the condensation and bleeding state of the pressure slurry in the cylinder, and more intuitively reflects the bleeding condition of the pressure slurry in the prestressed pore channel; the temperature control and the stress test are automatically completed by the collector without manual recording, the test operation is simpler, and the result is more accurate; except that the cylindrical isolating film is a disposable material, other used components can be reused, and the test and detection cost is effectively reduced.
Drawings
FIG. 1 is a schematic view of a magazine assembly;
FIG. 2 is a schematic view of a test assembly;
FIG. 3 is a schematic view of a temperature regulation assembly;
the reference numbers in the figures represent:
1. a material storage assembly; 11. a storage cylinder; 12. a first sealing cover; 13. a second sealing cover; 14. fastening screws; 15. a first bracket; 2. testing the component; 21. a first sensor; 22. a second sensor; 23. an isolator; 24. a collector; 25. a transmission line; 3. a temperature regulation component; 31. a control box; 32. a third sensor; 33. a temperature controller; 34. a second support.
Detailed Description
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
It should be noted that, when the present invention is described in terms of orientation, the terms "one end", "the other end", "above", "below", and the like, indicate orientation or positional relationship only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, "inner", "outer" refers to the outside of the inner core of the corresponding component profile, and the above terms should not be construed as limiting the present invention. If the particular gesture changes, the directional indication changes accordingly. In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The utility model provides a first sensor 21, second sensor 22, third sensor 32, collector 24, temperature controller 33 etc. are the devices commonly used in this field.
Example 1
The embodiment discloses a device for testing frost heaving stress of grouting material, which is shown in a combined graph 1-3 and comprises a material storage component 1, a testing component sleeved in the material storage component 1 and a temperature regulation and control component 3, wherein the material storage component 1 and the testing component are arranged in the temperature regulation and control component 3;
the storage assembly 1 comprises a storage barrel 11, the testing assembly comprises a plurality of groups of sensor units and isolating bodies 23 used for isolating the pressure slurry from the sensor units, the isolating bodies 23 are sleeved in the storage barrel 11, and the sensor units used for testing the frost heaving stress of the pressure slurry in the storage barrel 11 are arranged between the isolating bodies 23 and the storage barrel 11.
In the present embodiment, the magazine cartridge 11 is made of high-strength plexiglass. In order to facilitate the discharging of the solidified slurry, an included angle is formed between the axis of the storage barrel 11 and the horizontal line.
The separator 23 may be made of a film made of polyethylene or polyvinyl chloride, and is mainly used to separate the pressure sensitive adhesive from the sensor unit, so as to better detect the frost heaving stress.
In this embodiment, there are three sets of sensor units, each set of sensor units includes a first sensor 21 for measuring stress and a second sensor 22 for measuring temperature, the first sensor 21 is disposed around the inner wall of the storage barrel 11, and the second sensor 22 is disposed on the inner wall of the storage barrel 11. Specifically, the second sensor 22 may be disposed beside the first sensor 21.
The first sensor 21 can be a flexible film type force measuring sensor, a commercially available model type flexible science and technology RXL-1030 pressure sensor, the second sensor 22 can be a sheet temperature sensor, a model type can be a Kepuson PT100 surface thermocouple, and the three groups of sensor units are respectively attached to the upper position, the middle position and the lower position of the inner wall of the storage barrel 11.
Further, the storage assembly 1 further comprises a first bracket 15 for placing the storage cylinder 11 inside the temperature control assembly 3.
In this embodiment, another preferred embodiment is provided, wherein a first sealing cover 12 and a second sealing cover 13 are disposed at two ends of the first bracket 15, and the first sealing cover 12 and the second sealing cover 13 are fixed to the storage barrel 11 by fastening screws 14.
In this embodiment, another preferred embodiment is provided, in which the testing component further includes a collector 24, and a transmission line 25 is connected between the collector 24 and the sensor unit. The collector 24 is used for collecting data such as temperature, stress and the like collected by the sensor. The model may be rainbow OHR-F800.
Further, the temperature control assembly 3 includes a control box 31, and a second support 34 for placing the storage barrel 11 is disposed in the control box 31. The door of the control box 31 can be a high-temperature glass door, so that the internal condition in the box can be observed conveniently.
Specifically, the number of the second brackets 34 is at least two, and the top is provided with a concave portion matching with the storage barrel 11. So that the magazine 11 is more firmly supported inside the control box 31.
Further, a third sensor 32 for detecting an ambient temperature is provided inside the control box 31. Model number kaposi PT100 cylindrical thermocouple.
Specifically, the control box 31 is provided with a temperature controller 33. The temperature controller 33 is specifically an industrial intelligent temperature controller, and the model can be delaxi XMTD.
To sum up, the utility model discloses a pressure thick liquids frost heaving stress's testing arrangement's application method as follows:
when the device is used, the isolation body 23 is sleeved in the storage barrel 11, the grouting material slurry to be tested is poured into the storage barrel 11, then the first sealing cover 12 and the second sealing cover 13 are covered, fastening is carried out by using the fastening bolt, the sealed storage system is ensured not to leak liquid and be airtight, finally, the storage assembly 1 is arranged on the second support 34 in the control box 31 for initial curing, the initial curing temperature and time are determined according to the test purpose, and generally at least 3d of curing is carried out;
after the initial-stage maintenance is completed, observing the state of the slurry in the storage barrel 11, and starting a low-temperature test program to test the frost heaving stress, wherein the low-temperature test program is as follows: the environment temperature regulating system 3 is used for cooling at the cooling rate of 0.5 ℃/min until the temperature in the control box 31 reaches-30 ℃, then keeping the constant temperature for 1h, collecting the frost heaving stress and the surface temperature of the grouting material in real time through the testing assembly in the cooling process, and drawing a stress-temperature curve.
And after the frost heaving stress test is finished, taking the storage assembly 1 out, placing the storage assembly in an indoor environment, carrying out temperature return treatment and removing the waste grouting material for the next use.
The device of the utility model can quantitatively measure frost heaving stress generated by bleeding pressure slurry in the bridge prestressed pipeline, can visually observe the condensation and bleeding state of the pressure slurry in the cylinder, and more intuitively reflects the bleeding condition of the pressure slurry in the prestressed pore channel; the temperature control and the stress test are automatically completed by the collector without manual recording, the test operation is simpler, and the result is more accurate; except that the film adopted by the isolating body is a disposable material, other used components can be reused, and the test and detection cost is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The device for testing frost heaving stress of the grouting material is characterized by comprising a material storage assembly (1), a testing assembly (2) and a temperature regulation and control assembly (3), wherein the testing assembly (2) and the temperature regulation and control assembly (3) are sleeved in the material storage assembly (1), and the material storage assembly (1) and the testing assembly (2) are arranged in the temperature regulation and control assembly (3);
the storage assembly (1) comprises a storage barrel (11), the testing assembly (2) comprises a plurality of groups of sensor units and isolating bodies (23) used for isolating grouting materials and the sensor units, the isolating bodies (23) are sleeved in the storage barrel (11), and the sensor units used for testing the frost heaving stress of the grouting materials in the storage barrel (11) are arranged between the isolating bodies (23) and the storage barrel (11).
2. The device for testing the frost heaving stress of the grouting material according to claim 1, wherein the number of the sensor units is three, each group of sensor units comprises a first sensor (21) for measuring stress and a second sensor (22) for measuring temperature, the first sensor (21) is disposed around the inner wall of the storage barrel (11), and the inner wall of the storage barrel (11) is further provided with the second sensor (22).
3. The grouting material frost heave stress testing device according to claim 1, wherein the storage assembly (1) further comprises a first bracket (15) for placing the storage barrel (11) inside the temperature regulating assembly (3).
4. The grouting material frost heaving stress testing device of claim 3, wherein a first sealing cover (12) and a second sealing cover (13) are arranged at two ends of the first bracket (15), and the first sealing cover (12) and the second sealing cover (13) are hermetically fixed with the storage barrel (11) through fastening screws (14).
5. The grouting material frost heave stress testing device of claim 1, wherein the testing assembly (2) further comprises a collector (24), and a transmission line (25) is connected between the collector (24) and the sensor unit.
6. The grouting material frost heave stress testing device according to claim 1, wherein the temperature control assembly (3) comprises a control box (31), and a second bracket (34) for placing the storage barrel (11) is arranged in the control box (31).
7. The device for testing the frost heave stress of a grouting material according to claim 6, wherein the number of the second brackets (34) is at least two, and a concave part matched with the storage barrel (11) is arranged at the top.
8. The apparatus for testing frost heave stress of a grouting material according to claim 6, wherein a third sensor (32) for detecting ambient temperature is further provided inside the control box (31).
9. The apparatus for testing frost heave stress of a grouting material according to claim 6, wherein a temperature controller (33) is provided on the control box (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222599391.6U CN218766725U (en) | 2022-09-29 | 2022-09-29 | Device for testing frost heaving stress of prestressed duct grouting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222599391.6U CN218766725U (en) | 2022-09-29 | 2022-09-29 | Device for testing frost heaving stress of prestressed duct grouting material |
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| Publication Number | Publication Date |
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| CN218766725U true CN218766725U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222599391.6U Active CN218766725U (en) | 2022-09-29 | 2022-09-29 | Device for testing frost heaving stress of prestressed duct grouting material |
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| CN (1) | CN218766725U (en) |
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- 2022-09-29 CN CN202222599391.6U patent/CN218766725U/en active Active
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