CN221256877U - Tunnel structure prevents monitoring devices that ftractures - Google Patents
Tunnel structure prevents monitoring devices that ftractures Download PDFInfo
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- CN221256877U CN221256877U CN202323266044.2U CN202323266044U CN221256877U CN 221256877 U CN221256877 U CN 221256877U CN 202323266044 U CN202323266044 U CN 202323266044U CN 221256877 U CN221256877 U CN 221256877U
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- tunnel structure
- tunnel
- protection cylinder
- strain wire
- monitoring device
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 238000005336 cracking Methods 0.000 claims abstract description 27
- 230000002265 prevention Effects 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 8
- 239000004567 concrete Substances 0.000 claims description 25
- 238000013500 data storage Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The application relates to the technical field of tunnel construction, in particular to a device for monitoring cracking resistance of a tunnel structure. The tunnel structure cracking prevention monitoring device comprises a test sensor; the test sensor comprises a protection cylinder, an end block, a coil and a strain wire, wherein the protection cylinder is provided with openings at two ends, and the coil and the strain wire are electrically connected and are arranged in the protection cylinder; the two ends of the strain wire are connected with end blocks, and when the strain wire is in a preset zero-stress state, the end blocks at the two ends of the strain wire are respectively propped against the openings at the two ends of the protection cylinder; the test sensor is pre-buried in the tunnel structure. And whether the tunnel structure generates cracking trend can be monitored according to the condition of the electric signal fed back by the coil, so that measures can be taken to control the cracking before the tunnel structure generates cracking.
Description
Technical Field
The application relates to the technical field of tunnel construction, in particular to a device for monitoring cracking resistance of a tunnel structure.
Background
The secondary lining structure of the tunnel is one of important measures for guaranteeing safe operation of tunnel engineering, the secondary lining can further strengthen the tunnel structure, protect the main structure of the tunnel, effectively prevent infiltration of groundwater and soil, and prolong the service life of the tunnel.
However, if the reinforced concrete structure cracks during construction of the railway and highway tunnel, the problems of leakage and the like are easily caused, the repair is difficult, and the long-term use and the durability of the tunnel are seriously affected.
Thus, measures need to be taken in the tunnel construction process to control the generation of structural cracks.
Disclosure of utility model
The application aims to provide a device for monitoring cracking resistance of a tunnel structure, which solves the technical problem that the risk of cracking of a concrete structure is easy to occur during tunnel construction in the prior art to a certain extent.
The application provides a tunnel structure cracking prevention monitoring device, which comprises a test sensor, wherein the test sensor is arranged on the tunnel structure;
The test sensor comprises a protection cylinder, an end block, a coil and a strain wire, wherein the protection cylinder is in an opening shape at two ends, and the coil and the strain wire are electrically connected and are both arranged in the protection cylinder;
The two ends of the strain wire are connected with end blocks, and when the strain wire is in a preset zero-stress state, the end blocks at the two ends of the strain wire are respectively propped against the openings at the two ends of the protection cylinder;
The test sensor is pre-buried in the tunnel structure.
In the above technical scheme, further, the test sensor further comprises a thermistor, and the thermistor is arranged on the inner wall of the protection cylinder.
In any of the above technical solutions, further, the tunnel structure includes a steel structure and concrete;
The protection cylinder is connected with the steel structure, and the concrete is poured outside the protection cylinder and the steel structure.
In any of the above technical solutions, further, the number of the test sensors is plural, and the plurality of test sensors are distributed in the tunnel structure at intervals.
In any of the foregoing embodiments, further the tunnel structure has a plurality of typical sections;
each of the representative sections is provided with at least one test sensor.
In any of the above embodiments, further, along a length direction of the tunnel structure, a plurality of the typical sections are disposed at intermediate positions of the tunnel structure;
The plurality of typical sections are sequentially arranged at uniform intervals along the circumferential direction of the tunnel structure.
In any of the above embodiments, further, one of a length direction, a thickness direction, or a circumferential direction of the tunnel structure coincides with a length direction of the strain wire of the test sensor.
In any of the above technical solutions, further, the tunnel structure anti-cracking monitoring device further includes a data storage processing component and a data transmission component;
the data storage processing component is arranged outside the tunnel structure;
The coil and the thermistor of each of the test sensors are electrically connected with the data storage processing assembly through the data transmission assembly.
In any of the above solutions, further, the data storage processing assembly includes a protective case, a processor, and a connector;
The protection shell is arranged outside the tunnel structure, and the processor is electrically connected with the connector and is arranged in the protection shell;
The data transmission assembly comprises a shielding sleeve, a first connecting wire harness and a second connecting wire harness, wherein the first connecting wire harness and the second connecting wire harness are arranged in the shielding sleeve, the connector and the coil are electrically connected through the first connecting wire harness, and the connector and the thermistor are electrically connected through the second connecting wire harness.
In any of the above technical solutions, further, the strain wire is a steel string.
Compared with the prior art, the application has the beneficial effects that:
according to the tunnel structure cracking-prevention monitoring device, when the tunnel structure generates a cracking trend, the end block can apply tension to the end block or shift under the action of concrete, so that the end block can pull the strain wire to deform, the vibration frequency of the strain wire is changed after the length of the strain wire is changed, and the coil converts the vibration frequency of the strain wire into an electric signal.
Therefore, whether the tunnel structure generates cracking trend can be monitored according to the condition of the electric signals fed back by the coil, so that measures can be taken to control the cracking before the tunnel structure generates cracking.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a test sensor of a tunnel structure anti-cracking monitoring device according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a data storage processing component of a tunnel structure anti-cracking monitoring device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a tunnel structure anti-cracking monitoring device according to an embodiment of the present application.
Reference numerals:
1-a crack prevention monitoring device for a tunnel structure; 10-testing the sensor; 100-protecting a cylinder; 101-strain wire; 102-end block; 103-coil; 104-a thermistor; 105-locking member; 11-a data storage processing component; 110-a protective shell; a 111-processor; 112-connectors; 113-a power supply; 12-data transmission component.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1 to 3, an embodiment of the present application provides a device 1 for monitoring a tunnel structure for preventing cracking, particularly a secondary lining structure of a tunnel.
The tunnel structure anti-cracking monitoring device 1 provided in this embodiment includes a test sensor 10, specifically, the test sensor 10 is a pre-buried sensor.
The test sensor 10 includes a protection tube 100, an end block 102, a coil 103, and a strain wire 101, wherein the protection tube 100 is formed with an opening at both ends, the protection tube 100 is a metal tube, the strain wire 101 is deformed in tension, and the strain wire 101 may be a steel string, for example.
The coil 103 and the strain wire 101 are electrically connected and are all arranged in the protection cylinder 100, so that installation positions are provided for the coil 103 and the strain wire 101 through the inner space of the protection cylinder 100, and the coil 103 and the strain wire 101 are protected through the protection cylinder 100; the coil 103 is electrically connected to the wire 101, so that the coil 103 can convert the stress deformation amount of the wire 101 and the vibration frequency of the wire 101 into an electric signal.
The two ends of the strain wire 101 are connected with end blocks 102, when the strain wire 101 is in a preset zero-stress state, the end blocks 102 at the two ends of the strain wire 101 are respectively abutted against the two end openings of the protection barrel 100, specifically, when the strain wire 101 is in the preset zero-stress state, the strain wire 101 is not in an absolute zero-stress state but in an opposite zero-stress state, that is, in the state, the strain wire 101 has a certain prestress so that the end blocks 102 at the two ends of the strain wire are respectively abutted against the two end openings of the protection barrel 100.
The end block 102 is in a block shape instead of a rod shape, so that the sensitivity of feeding back structural changes of concrete is improved, and orthographic projections of the protection cylinder 100 on the end block 102 are all located on the end block 102, so that openings at two ends of the protection cylinder 100 can be all plugged by the end block 102, an initial position of the end block 102 can be kept through the protection cylinder 100, a zero-stress state of the strain wire 101 is stable, an inner space of the protection cylinder 100 can be protected, and the situation that the concrete enters the protection cylinder 100 in a concrete pouring process is avoided.
The test sensor 10 is pre-buried in the tunnel structure, specifically, the test sensor 10 is placed at the position to be formed of the tunnel structure, then concrete is poured at the position to be formed, and after the concrete is solidified, the test sensor 10 is pre-buried in the tunnel structure.
When the tunnel structure is cracked, the end block 102 can apply tension to the end block 102 or shift under the action of concrete, and then the end block 102 can pull the strain wire 101 to deform, the vibration frequency of the strain wire 101 changes along with the change of the length of the strain wire 101, and the coil 103 converts the vibration frequency into an electric signal.
It can be determined and monitored whether the tunnel structure is cracked according to the electric signal fed back by the coil 103, so that measures can be taken to control the occurrence of cracks before the tunnel structure is cracked.
Optionally, an avoidance space is provided in the end block 102, and a locking member 105 is provided in the avoidance space, where the end of the strain wire 101 penetrates and is fixed with the locking member 105, so that the end of the strain wire 101 is connected with the end block 102, and the locking member 105 is, for example, a wire clip.
In an alternative of this embodiment, the test sensor 10 further includes a thermistor 104, where the thermistor 104 is disposed on the inner wall of the protection cylinder 100, so that the temperature of the protection cylinder 100 is measured by the thermistor 104, and since the protection cylinder 100 is embedded in the concrete of the tunnel structure, the temperature of the protection cylinder 100 is approximately equal to the temperature of the concrete inside the tunnel structure, so that the temperature of the concrete of the tunnel structure can be measured by the thermistor 104.
That is, the temperature parameters such as the highest temperature value, the cooling rate and the temperature difference between the interior and exterior of the concrete of the tunnel structure are measured by the thermistor 104, wherein the "temperature difference between the interior and exterior is the difference between the outside temperature and the temperature inside the concrete, so that it is possible to determine whether the tunnel structure is at risk of cracking according to the temperature parameter measured by the thermistor 104.
In addition, since the strain coefficient of the strain wire 101 is affected by the temperature of the tunnel structure, the measurement result obtained by the coil 103 can be subjected to temperature correction by the temperature parameter measured by the thermistor 104, so as to improve the accuracy of monitoring the crack of the tunnel structure.
In an alternative of this embodiment, the tunnel structure includes a steel structure and concrete, the protection cylinder 100 is connected to the steel structure, and the concrete is poured outside the protection cylinder 100 and the steel structure.
Specifically, the steel structure of the tunnel structure comprises criss-cross steel frames so as to support and strengthen the concrete through the steel frames.
The protective cylinder 100 is first connected to the steel structure to secure the test sensor 10 to the steel structure. And then pouring concrete into the steel structure, and after the pouring is completed, forming the tunnel structure after the concrete is solidified. Meanwhile, the test sensor 10 is pre-buried in the tunnel structure in a fixed posture of the protection cylinder 100, so that the protection cylinder 100 is prevented from shifting under the effect of tunnel structure change, and the accuracy of tunnel structure cracking monitoring is ensured.
In an alternative of this embodiment, the number of test sensors 10 is plural, and the plurality of test sensors 10 are distributed in the tunnel structure at intervals, so that a plurality of positions in the tunnel structure are monitored by the plurality of test sensors 10.
In an alternative to this embodiment, the tunnel structure has a plurality of typical sections that may be empirically selected to be those that are prone to cracking.
Each representative section is provided with at least one test sensor 10, in other words, one or more test sensors 10, and when each representative section is provided with a plurality of test sensors 10, each representative section is subjected to multi-point monitoring by the plurality of test sensors 10.
In an alternative of this embodiment, when it is worth explaining, the length direction of the tunnel structure refers to the direction in which the two ends of the tunnel structure are penetrated, the thickness direction of the tunnel structure refers to the distance between the outer layer wall surface and the inner layer wall surface of the tunnel structure, and the circumferential direction of the tunnel structure refers to the direction in which the outer layer wall surface and the inner layer wall surface extend in parallel.
Along the length direction of the tunnel structure, a plurality of typical sections are arranged at the middle position of the tunnel structure, and along the circumference of the tunnel structure, the plurality of typical sections are sequentially arranged at uniform intervals.
Taking the number of typical sections as 5 as an example, the 5 typical sections are all arranged at 1/2 length of the tunnel structure. Further, two typical sections are symmetrically arranged at 1/3 of the height of two sides of the tunnel structure, the other two typical sections are symmetrically arranged at 2/3 of the height of two sides of the tunnel structure, and the other one typical section is arranged at the highest position of the tunnel structure.
By configuring the positions of the plurality of typical sections, the tunnel structure is comprehensively monitored for crack prevention along the circumferential direction of the tunnel structure.
In an alternative to this embodiment, one of the length direction, thickness direction, or circumferential direction of the tunnel structure coincides with the length direction of the strain wire 101 of the test sensor 10.
Therefore, the anti-cracking monitoring is effectively carried out in multiple directions of the tunnel structure, the anti-cracking monitoring in the composite direction is further realized, and the accuracy and the comprehensiveness of the anti-cracking monitoring are further improved.
Optionally, each typical section is provided with at least one test sensor 10 whose length direction of the strain wire 101 coincides with the length direction of the tunnel structure, at least one test sensor 10 whose length direction of the strain wire 101 coincides with the thickness direction of the tunnel structure, and at least one test sensor 10 whose length direction of the strain wire 101 coincides with the circumferential direction of the tunnel structure.
In an alternative of this embodiment, the tunnel structure cracking prevention monitoring device 1 further includes a data storage processing component 11 and a data transmission component 12.
The data storage processing assembly 11 is disposed outside the tunnel structure, and the coil 103 and the thermistor 104 of each test sensor 10 are electrically connected to the data storage processing assembly 11 through the data transmission assembly 12. In other words, the plurality of test sensors 10 are electrically connected to the data storage processing assembly 11 through the plurality of data transmission assemblies 12 in a one-to-one correspondence such that the coil 103 and the thermistor 104 of each test sensor 10 transmit electrical signals to the data storage processing assembly 11 through separate data transmission channels.
The electrical signals monitored by the coil 103 and the thermistor 104 can be transmitted to the data storage processing assembly 11 through the data transmission assembly 12, and the data storage processing assembly 11 stores and processes the received electrical signals to determine whether the tunnel structure is cracked or not for reference of constructors.
In an alternative to this embodiment, the data storage processing assembly 11 includes a protective shell 110, a processor 111, and a connector 112.
The protective case 110 is disposed outside the tunnel structure, and the processor 111 and the connector 112 are electrically connected and are both disposed inside the protective case 110, so that the processor 111 and the connector 112 are installed and protected through the protective case 110.
The data transmission assembly 12 includes a shield, a first connection harness and a second connection harness, both of which are disposed in the shield, so as to protect the first connection harness and the second connection harness by the shield and to prevent interference between electrical signals transmitted by the first connection harness and the second connection harness.
The connector 112 and the coil 103 are electrically connected by a first connection harness, and the connector 112 and the thermistor 104 are electrically connected by a second connection harness.
On the one hand, the processor 111 transmits the excitation signal and the pickup signal to the first connection harness through the connector 112, and then transmits the excitation signal and the pickup signal to the coil 103, the coil 103 enables the strain wire 101 to resonate with the concrete of the tunnel structure, meanwhile picks up the vibration frequency signal of the strain wire 101 in the resonance state, the picked vibration frequency signal is transmitted to the connector 112 through the first connection harness, and finally is transmitted to the processor 111 through the connector 112, and the processor 111 can obtain the expansion and contraction change amount of the concrete of the tunnel structure.
On the other hand, the processor 111 transmits the excitation signal and the pickup signal to the second connection harness through the connector 112, and then to the thermistor 104, and measures the temperature parameter through the thermistor 104, and picks up the temperature parameter signal at the same time, and the second connection harness through which the picked-up temperature parameter signal passes is transmitted to the connector 112, and finally, the processor 111 can obtain the temperature parameter of the concrete of the tunnel structure through being connected to the processor 111.
Alternatively, the processor 111 may select a controller having a memory function.
Optionally, the data storage processing assembly 11 further includes a power supply 113, the power supply 113 being electrically connected to the processor 111 to supply power to the processor 111.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, any of the claimed embodiments can be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. The device for monitoring the cracking resistance of the tunnel structure is characterized by comprising a test sensor;
The test sensor comprises a protection cylinder, an end block, a coil and a strain wire, wherein the protection cylinder is in an opening shape at two ends, and the coil and the strain wire are electrically connected and are both arranged in the protection cylinder;
The two ends of the strain wire are connected with end blocks, and when the strain wire is in a preset zero-stress state, the end blocks at the two ends of the strain wire are respectively propped against the openings at the two ends of the protection cylinder;
The test sensor is pre-buried in the tunnel structure.
2. The tunnel construction crack prevention monitoring device of claim 1, wherein the test sensor further comprises a thermistor disposed on an inner wall of the protective barrel.
3. The tunnel structure crack prevention monitoring device of claim 1, wherein the tunnel structure comprises a steel structure and concrete;
The protection cylinder is connected with the steel structure, and the concrete is poured outside the protection cylinder and the steel structure.
4. The tunnel structure crack prevention monitoring device of claim 2, wherein a plurality of the test sensors are provided, and a plurality of the test sensors are distributed in the tunnel structure at intervals.
5. The tunnel structure crack prevention monitoring device of claim 4, wherein the tunnel structure has a plurality of typical cross sections;
each of the representative sections is provided with at least one of the test sensors.
6. The apparatus according to claim 5, wherein a plurality of the representative cross sections are provided at intermediate positions of the tunnel structure along a length direction of the tunnel structure;
The plurality of typical sections are sequentially arranged at uniform intervals along the circumferential direction of the tunnel structure.
7. The tunnel structure crack prevention monitoring device of claim 6, wherein one of a length direction, a thickness direction, or a circumferential direction of the tunnel structure coincides with a length direction of the strain wire of the test sensor.
8. The tunnel construction crack prevention monitoring device of claim 4, further comprising a data storage processing assembly and a data transmission assembly;
the data storage processing component is arranged outside the tunnel structure;
The coil and the thermistor of each of the test sensors are electrically connected with the data storage processing assembly through the data transmission assembly.
9. The tunnel construction crack prevention monitoring device of claim 8, wherein the data storage processing assembly comprises a protective shell, a processor, and a connector;
The protection shell is arranged outside the tunnel structure, and the processor is electrically connected with the connector and is arranged in the protection shell;
The data transmission assembly comprises a shielding sleeve, a first connecting wire harness and a second connecting wire harness, wherein the first connecting wire harness and the second connecting wire harness are arranged in the shielding sleeve, the connector and the coil are electrically connected through the first connecting wire harness, and the connector and the thermistor are electrically connected through the second connecting wire harness.
10. The tunnel structure crack prevention monitoring device of claim 1, wherein the strain wire is a steel string.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221256877U true CN221256877U (en) | 2024-07-02 |
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