CN215177636U - Displacement monitoring device for tunnel exit retaining wall slope protection - Google Patents
Displacement monitoring device for tunnel exit retaining wall slope protection Download PDFInfo
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- CN215177636U CN215177636U CN202122289586.6U CN202122289586U CN215177636U CN 215177636 U CN215177636 U CN 215177636U CN 202122289586 U CN202122289586 U CN 202122289586U CN 215177636 U CN215177636 U CN 215177636U
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Abstract
The utility model provides a displacement monitoring device for tunnel exit barricade bank protection, the displacement monitoring device comprises a plurality of measuring units which are connected in series, and each measuring unit is connected by adopting a flexible joint which can be deformed, so that the measuring units can be inclined relatively; the measuring unit comprises an outer sleeve, and an inclination angle sensor and a pushing spring plate which are arranged in the outer sleeve; the pushing spring plate is installed between the outer circumferential surface and the inner circumferential surface of the outer sleeve in a prepressing manner. The displacement monitoring device is provided with the pushing spring plate which is connected with the outer sleeve, the inclination angle sensor cannot incline due to vibration by the pushing spring plate, external deformation pressure can be transmitted to the inclination angle sensor, the position change of the inclination angle sensor is the real displacement of an external soil layer, and the accuracy of the displacement monitoring device is improved.
Description
Technical Field
The utility model relates to an engineering detection area especially relates to a displacement monitoring devices for tunnel exit barricade bank protection.
Background
Deformation monitoring techniques commonly used in engineering are generally classified into two types, internal observation and external observation: the external observation mainly comprises a level gauge, a total station, a GPS, a slope radar and other equipment, and the internal observation mainly comprises the steps of installing and burying various sensors and automatically collecting and processing data by data acquisition equipment.
At present, a sensor array formed by connecting a plurality of sections of displacement sensors in series is generally adopted, and the sensor array can be bent freely according to needs so as to adapt to monitoring of special scenes. As shown in fig. 1, fig. 1 is a schematic structural diagram of an array type displacement meter in the prior art. The array displacement meter comprises an inclinometer 12 and a rigid sleeve 121; the sliding guide wheel 14 is used for installing the inclinometer frame 12 in the inclinometer tube 11, and the sensor in the array type displacement meter is supported by the sliding guide wheel 14. When a train in the prior art passes through at a high speed, high-frequency and even large-amplitude vibration interference is carried out on the tunnel exit retaining wall protection slope, data jumping and errors caused by shaking of the sensor are difficult to avoid, so that the sensor inside is inclined, monitoring deviation is caused, and error guidance is easily given to maintenance of the tunnel exit retaining wall protection slope, train operation scheduling and the like.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a displacement monitoring device for protecting a tunnel exit retaining wall slope, so as to eliminate or improve one or more defects existing in the prior art.
The technical scheme of the utility model as follows:
the displacement monitoring device comprises a plurality of measuring units which are connected in series, and the measuring units are connected by adopting deformable flexible joints so that the measuring units can be relatively inclined; the measuring unit comprises an outer sleeve, and an inclination angle sensor and a pushing spring plate which are arranged in the outer sleeve; the pushing spring plate is installed between the outer circumferential surface and the inner circumferential surface of the outer sleeve in a prepressing manner.
In some embodiments, the tilt sensor is an acceleration sensor.
In some embodiments, the tilt sensor includes three acceleration sensors perpendicular to each other and along X, Y and the Z axis.
In some embodiments, the surface of the tilt sensor has an X-axis scribe line.
In some embodiments, the flexible joint comprises a universal joint or hose connecting each tilt sensor and a rubber sleeve connecting each outer sleeve.
In some embodiments, a ball is embedded in the middle of the pushing spring plate, and the ball is attached to the inside of the outer sleeve.
In some embodiments, the bottom of the tilt sensor of the lowermost measuring unit is provided with a hanging weight.
In some embodiments, the bottom of the outer sleeve of the lowermost measuring unit is provided with a conical structure.
In some embodiments, the signal lines of each of the tilt sensors are connected in series by a bus.
In some embodiments, the top of the outer sleeve of the uppermost measuring unit is sealed by a top cap, the tilt angle sensor of the uppermost measuring unit is connected with a positioning and mounting tube which can be bent but not twisted, the positioning and mounting tube extends out through a mounting hole of the top cap, the positioning and mounting tube is provided with an X-axis marking line, and the bus is arranged in the positioning and mounting tube.
According to the utility model discloses a displacement monitoring devices for tunnel export barricade bank protection, obtainable beneficial effect includes at least: the displacement monitoring device is provided with the pushing spring plate which is connected with the outer sleeve, the inclination angle sensor cannot incline due to vibration by the pushing spring plate, external deformation pressure can be transmitted to the inclination angle sensor, the position change of the inclination angle sensor is the real displacement of an external soil layer, and the accuracy of the displacement monitoring device is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the following detailed description.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For convenience in illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:
fig. 1 is a schematic structural diagram of an array type displacement meter in the prior art.
Fig. 2 is an embodiment of the present invention provides a schematic structural diagram of a displacement monitoring device for protecting slope of tunnel exit retaining wall.
Fig. 3 is a schematic view of a gravitational field calculated angle of a tilt sensor of a displacement monitoring device according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an angle estimation deformation amount of the tilt sensor of the displacement monitoring device according to an embodiment of the present invention.
Reference numerals:
2. a measuring unit; 21. an outer sleeve; 22. a tilt sensor; 221. an X-axis marker line; 23. pushing against the spring plate; 231. a ball bearing; 3. a flexible joint; 31. a universal joint; 32. a rubber sleeve; 41. drooping heavy objects; 42. a tapered structure; 43. a bus; 44. a top cap; 45. positioning the installation pipe;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and/or process steps that are closely related to the solution according to the invention are shown in the drawings, while other details that are not relevant to the invention are omitted.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.
The utility model provides a displacement monitoring devices for tunnel export barricade bank protection to reduce the measuring error of current array displacement meter, provide accurate displacement information for the monitoring of tunnel export barricade bank protection.
As shown in fig. 2, in some embodiments, the displacement monitoring device comprises a plurality of measuring units 2 connected in series, and the measuring units 2 are connected by flexible joints 3 capable of deforming, so that the measuring units 2 can be relatively inclined; the measuring unit 2 comprises an outer sleeve 21, and an inclination angle sensor 22 and a pushing spring sheet 23 which are arranged inside the outer sleeve 21; the urging spring pieces 23 are mounted between the outer peripheral surface and the inner peripheral surface of the outer sleeve 21 with preload.
In the above embodiment, the displacement monitoring device is provided with the pushing spring piece 23 connected with the outer sleeve 21, the pushing spring piece 23 does not cause the inclination angle sensor 22 to incline due to vibration, the external deformation pressure can be transmitted to the inclination angle sensor 22, the position change of the inclination angle sensor 22 is the real displacement of the external soil layer, and the accuracy of the displacement monitoring device is improved.
In some embodiments, the tilt sensor 22 is an acceleration sensor, which calculates the angle between the corresponding axis and the gravity direction according to the data of the gravity acceleration in different axial directions, and calculates the displacement of the corresponding measuring unit 2 according to the change of the angle. Further, the tilt sensor 22 includes three acceleration sensors perpendicular to each other and along the X, Y and Z axes. Each measuring unit 2 is provided with three acceleration sensors, and the included angle theta between the corresponding axis and the gravity direction is calculated by measuring the acceleration values of the sensors. Without being limited thereto, the tilt sensor 22 may also comprise only one or two acceleration sensors, the measurable displacements of different dimensions depending on the number of acceleration sensors thereof.
Fig. 3 is a schematic diagram of a gravitational field reckoning angle of the tilt sensor 22 of the displacement monitoring device according to an embodiment of the present invention. Fig. 4 is a schematic diagram of the angular rate deformation of the tilt sensor 22 of the displacement monitoring device according to an embodiment of the present invention. As shown in fig. 3 and 4, the displacement amount of the corresponding measuring unit 2 is calculated by calculating the angle θ between the corresponding axis and the direction of gravity (d ═ L × Sin θ). When the length of each measurement unit 2 is L, the coordinate length D of the ith measurement unit 2 in the coordinate system in the gravity direction is L × Sin θ i, and the coordinate of the corresponding ith measurement unit 2 in the global coordinate system is the accumulated value D ∑ L × Sin θ i of the 1 st measurement unit 2 to the ith measurement unit 2.
Wherein, d: -deformation values of the single measuring unit 2 in the three-dimensional axis (X, Y, Z) with respect to a reference;
l: the length of the single measuring unit 2 (0.3m, 0.5m, 1 m);
θ: the single measuring unit 2 corresponds to the angle between the axis and the direction of gravity.
In some embodiments, the displacement monitoring device is designed by adopting the segmented measuring units 2, and can be combined on site according to different monitoring project requirements, the length of the displacement monitoring device can be freely spliced, and the displacement monitoring device can be really reused.
In some embodiments, the surface of the tilt sensor 22 has an X-axis marker line 221 such that the reference axes of the respective tilt sensors 22 are maintained coincident when the mounting of the tilt sensors 22 is performed.
In some embodiments, the flexible joint 3 comprises a universal joint 31 or a hose connecting each tilt sensor 22 and a rubber sleeve 32 connecting each outer sleeve 21. The structure can ensure that the displacement between the inclination angle sensors 22 and between the outer sleeves 21 can be the same as that of the outside geology.
The displacement monitoring device measures deformation data of the region where each measuring unit 2 is located through the inclination angle sensor 22 installed in the outer sleeve 21, the measuring units 2 can acquire deep displacement of full depth in a hole, the smaller the length of the measuring units 2 is, the higher the measuring precision is, and when the number of the measuring units 2 is enough, automatic monitoring of deep displacement of any depth in the hole can be realized.
In some embodiments, the middle position of the pushing spring 23 may be embedded with a ball 231, and the ball 231 fits inside the outer sleeve 21, so that the tilt process of the tilt sensor 22 in the outer sleeve 21 is smoother when the tilt sensor is subjected to external geological deformation pressure.
In some embodiments, the bottom of the tilt sensor 22 of the lowermost measuring unit 2 is provided with a hanging weight 41, and the hanging weight 41 can ensure that all the tilt sensors 22 maintain a vertical position in an initial state and avoid a vibration inclination caused by high-speed train running. Further, the bottom of the outer sleeve 21 of the lowermost measuring unit 2 is provided with a tapered structure 42, which tapered structure 42 may facilitate the mounting process of the displacement monitoring device in the hole.
In some embodiments, the signal lines of each of the tilt sensors 22 are connected in series by a bus 43. The top of the outer sleeve 21 of the uppermost measuring unit 2 is sealed by a top cap 44, the tilt angle sensor 22 of the uppermost measuring unit 2 is connected with a bendable but non-twistable positioning installation pipe 45, the positioning installation pipe 45 extends out through an installation hole of the top cap 44, the positioning installation pipe is provided with an X-axis mark line 221, and the bus 43 is arranged in the positioning installation pipe.
After the top cap 44 is covered on the outer sleeve 21 of the uppermost measuring unit 2, the outer sleeve 21 is vertically embedded in a measuring matrix, a measuring base surface is exposed at the top, and the orientation of the displacement monitoring device is adjusted by rotating and positioning the mounting tube 45, so that the mounting is completed. The device has simple structure and low cost, and can effectively avoid data jump and error caused by the shaking of the sensor, thereby ensuring the reliability of the monitoring data; due to the adoption of the segmented sleeve design, the burying risk of the array displacement meter can be effectively avoided.
The specific use method of the displacement monitoring device is as follows:
(1) drilling a monitoring hole at the monitoring position, wherein the depth of the monitoring hole is below bedrock or a sliding bed, and the aperture is larger than the outer diameter of the outer sleeve 21;
(2) connecting the outer sleeves in sections, inserting the outer sleeves into the monitoring holes, and injecting quick-drying cement paste around the outer sleeves to fix the outer sleeves;
(3) inserting the tilt sensor 22 array into the outer sleeve 21, adjusting the height and the orientation, and enabling the orientation of the positioning installation tube 45 to be consistent with the X/Y/Z direction of the sensor;
(4) and screwing the top cap 44 to complete installation and implement rock and soil mass monitoring.
According to the utility model discloses a displacement monitoring devices for tunnel export barricade bank protection, obtainable beneficial effect includes at least:
(1) the displacement monitoring device is provided with the pushing spring plate which is connected with the outer sleeve, the inclination angle sensor cannot incline due to vibration by the pushing spring plate, external deformation pressure can be transmitted to the inclination angle sensor, the position change of the inclination angle sensor is the real displacement of an external soil layer, and the accuracy of the displacement monitoring device is improved.
(2) The displacement monitoring device adopts a segmented measuring unit design, can be combined on site according to different monitoring project requirements, freely splices the length of the displacement monitoring device, and really realizes repeated use. The measuring unit can be set to a smaller length, the measuring precision is higher, and the automatic monitoring of deep displacement at any depth can be realized.
(3) The displacement monitoring device is provided with the drooping weight, so that all the inclination angle sensors can be ensured to be kept vertical in the initial state, and the vibration inclination caused by high-speed running of the train is also avoided.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention. 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 (10)
1. A displacement monitoring device for tunnel exit retaining wall slope protection is characterized by comprising a plurality of measuring units which are connected in series, wherein the measuring units are connected by adopting deformable flexible joints, so that the measuring units can be inclined relatively; the measuring unit comprises an outer sleeve, and an inclination angle sensor and a pushing spring plate which are arranged in the outer sleeve; the pushing spring plate is installed between the outer circumferential surface and the inner circumferential surface of the outer sleeve in a prepressing manner.
2. The displacement monitoring device for tunnel exit retaining wall revetment according to claim 1, wherein said tilt sensor is an acceleration sensor.
3. The displacement monitoring device for tunnel exit retaining wall revetment according to claim 2, wherein said tilt sensor comprises three acceleration sensors perpendicular to each other and along X, Y and Z-axis.
4. The displacement monitoring device for tunnel exit retaining wall revetment according to claim 3, wherein the surface of said tilt sensor has an X-axis marking.
5. The displacement monitoring device for tunnel exit retaining wall revetment according to claim 1, wherein said flexible joints comprise universal joints or hoses connecting each of said tilt sensors and rubber sleeves connecting each of said outer sleeves.
6. The displacement monitoring device for tunnel exit retaining wall slope protection according to claim 1, wherein a ball is embedded in the middle position of the pushing spring plate, and the ball is attached to the inside of the outer sleeve.
7. The displacement monitoring device for tunnel exit retaining wall revetment according to claim 1, wherein a hanging weight is provided at the bottom of said tilt sensor of the lowermost said measurement unit.
8. The displacement monitoring device for tunnel exit retaining wall revetment according to claim 7, wherein a bottom of said outer sleeve of said lowermost measuring unit is provided with a tapered structure.
9. The displacement monitoring device for tunnel exit retaining wall revetment according to claim 1, wherein signal lines of each of said tilt sensors are connected in series by a bus.
10. The displacement monitoring device for tunnel exit retaining wall protection slope according to claim 9, wherein the top of the outer sleeve of the uppermost measuring unit is sealed by a top cap, the tilt angle sensor of the uppermost measuring unit is connected with a positioning installation pipe which can be bent but not twisted, the positioning installation pipe extends out through an installation hole of the top cap, the positioning installation pipe is provided with an X-axis mark line, and the bus is arranged in the positioning installation pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122289586.6U CN215177636U (en) | 2021-09-22 | 2021-09-22 | Displacement monitoring device for tunnel exit retaining wall slope protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122289586.6U CN215177636U (en) | 2021-09-22 | 2021-09-22 | Displacement monitoring device for tunnel exit retaining wall slope protection |
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| CN202122289586.6U Active CN215177636U (en) | 2021-09-22 | 2021-09-22 | Displacement monitoring device for tunnel exit retaining wall slope protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060236A (en) * | 2022-06-15 | 2022-09-16 | 北京中关村智连安全科学研究院有限公司 | Inclination measuring device and method |
| CN116592749A (en) * | 2023-05-29 | 2023-08-15 | 杭州石峦科技有限公司 | Array type flexible displacement detector based on remote information transmission |
-
2021
- 2021-09-22 CN CN202122289586.6U patent/CN215177636U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060236A (en) * | 2022-06-15 | 2022-09-16 | 北京中关村智连安全科学研究院有限公司 | Inclination measuring device and method |
| CN116592749A (en) * | 2023-05-29 | 2023-08-15 | 杭州石峦科技有限公司 | Array type flexible displacement detector based on remote information transmission |
| CN116592749B (en) * | 2023-05-29 | 2023-11-21 | 杭州石峦科技有限公司 | Array type flexible displacement detector based on remote information transmission |
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