CN210293156U - Sensor for measuring dynamic relative slip of contact interface of soil and underground structure - Google Patents
Sensor for measuring dynamic relative slip of contact interface of soil and underground structure Download PDFInfo
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- CN210293156U CN210293156U CN201920897555.9U CN201920897555U CN210293156U CN 210293156 U CN210293156 U CN 210293156U CN 201920897555 U CN201920897555 U CN 201920897555U CN 210293156 U CN210293156 U CN 210293156U
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Abstract
The utility model provides a measure sensor that native and underground structure contact interface developments relative slip, include: the device comprises a sliding rail (1), a protective cover (2), a limiting roller (3), a rolling bearing (4) and an angular displacement sensor (5); the sliding rails (1) are arranged on two sides of the protective cover (2) and fixed on the surface of the underground structure; the protective cover (2) is a box provided with openings on a group of opposite side walls; the rolling bearing (4) penetrates through the opening of the protective cover (2); the limiting idler wheel (3) comprises an idler wheel and a wheel shaft, the idler wheel is embedded in the sliding rail (1), and the wheel shaft penetrates through the rolling bearing (4) and is connected with a rotating shaft of the angular displacement sensor (5); when the dynamic relative slippage of the contact interface of the soil and the underground structure is measured, the angular displacement sensor (5) is driven by the limiting roller (3) to generate angular displacement. The utility model provides a sensor's simple structure, detect convenient operation, the range is big, and waterproof and separate native performance good, the accuracy is high.
Description
Technical Field
The utility model relates to a civil engineering technical field specifically, relates to measure sensor that native and underground structure contact interface developments slide relatively.
Background
With the rapid development of socioeconomic of China, the development requirement of urban underground space is more and more increased. The traffic pressure can be alleviated greatly in tunnel, subway engineering, improves the trip condition, and city utility tunnel can the efficient utilize the underground space, is favorable to the maintenance and the intensification management of pipeline, etc.. The method has very important social and economic significance for the research on the disaster prevention, reduction and earthquake resistance of underground engineering structures, particularly underground lifeline engineering. The relative slippage of the soil and the underground engineering structure is caused by the action of earthquake or other horizontal power, the relative slippage of the contact interface of the soil and the structure is an important index for reflecting the interaction of the soil and the underground engineering structure, and the measurement of the relative dynamic sliding displacement of the contact interface of the soil and the underground engineering structure in the simulation earthquake shaking table test and other related power tests is an important means for deeply researching and exploring the earthquake response mechanism of the underground structure, so that the damage condition and the relative dynamic slippage rule of the contact interface of the soil and the structure can be known.
At present, only Japanese scholars carry out unique one-time design abroad, but the structure is complex, the manufacturing requirement is high, a groove needs to be formed in a structural model, and the design is difficult to realize on a test model structure with a thin pipe wall.
Similar sensors for measuring soil body slippage in China only comprise a dynamic soil body slippage measuring sensor (application No. 200810032775.1, publication No. CN10216366A) on the contact surface of soil and an underground structure, and disclose a displacement sensor for measuring the dynamic soil body slippage on the contact surface of the soil and the underground structure by using an angular displacement sensor and a pulley mode. However, in the actual use process, the method cannot ensure that the sensor is in close contact with the surface of the underground structure, and if the pulley at the bottom of the sensor is separated from the contact surface, the sensor cannot work normally; in addition, the method cannot measure other conditions than the contact surface being a flat surface, such as the contact surface being a curved surface or other irregular interface.
Related sensors for measuring underground soil displacement in China are 'soil internal displacement measuring devices and measuring methods thereof (application number 201010039640.5, publication number CN 101749996A)', but the sensors are only used for measuring the self vertical displacement in the soil, such as the settlement at a certain point in the soil, and are not suitable for measuring the tangential relative sliding displacement of the contact surface of the soil and an underground structure.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a measure sensor that native and underground structure contact interface developments relative slip.
In a first aspect, the utility model provides a measure sensor that native and underground structure contact interface developments relative slide, include: the device comprises a sliding rail, a protective cover, a limiting roller, a rolling bearing and an angular displacement sensor; the limiting idler wheels are positioned on two sides of the protective cover; the protective cover is of a hollow structure and is used for accommodating the angular displacement sensor, and a group of side walls opposite to the protective cover are provided with openings; the rolling bearing penetrates through the opening of the protective cover; the limiting idler wheel comprises an idler wheel and a wheel shaft; the wheel shaft penetrates through the rolling bearing and is connected with a rotating shaft of the angular displacement sensor; wherein:
the sliding rail is fixed on a contact surface of an underground structure, and the roller is embedded in the sliding rail and used for limiting the roller to rotate according to the direction of the sliding rail; the rolling bearing is embedded in the opening position of the protective cover; a rotating shaft of the angular displacement sensor is in transmission connection with the rolling bearing, and the rotating shaft of the angular displacement sensor is parallel to the test surface; when the dynamic relative slippage of the contact interface of the measuring soil and the underground structure occurs, the angular displacement sensor is driven by the limiting roller to generate angular displacement, and the angular displacement is used for representing the dynamic relative slippage of the contact interface of the measuring soil and the underground structure.
Wherein, the safety cover is square only the box cover of lateral wall trompil, plays the effect of holding the sensor and isolated soil body. The bottom surface of the protective cover is close to the surface of the underground structure, but a proper gap is kept to ensure that the sensor does not touch the underground structure in the working process. In order to measure the tangential slippage of the contact interface of the soil body and the underground structure, the height and the volume of the protective cover are required to be as small as possible.
Optionally, a contact layer is arranged in the slide rail and used for increasing sliding friction between the slide rail and the limiting roller. The contact layer is arranged in the slide rail, so that the sliding friction force between the contact layer and the limiting idler wheel can be increased, and the limiting idler wheel can only rotate along the arrangement direction of the slide rail.
Optionally, the sliding rail is fixed and tightly attached to the structure contact surface by structural glue or bolts, wherein the curvature of the contact surface of the sliding rail and the underground structure is consistent. The shape of the slide rail can be changed according to the contact surface (such as a plane or a curved surface) of the structure, so that the curvature of the slide rail is consistent with that of the contact surface of the underground structure.
Optionally, the clearance between the bottom surface of the protective cover and the surface of the underground structure is within a preset range.
Optionally, a roller wheel shaft of the limiting roller at one side of the protective cover is inserted into the rolling bearing and is connected with a rotating shaft of the angular displacement sensor; and a roller wheel shaft of the limiting roller on the other side of the protective cover is also inserted into the rolling bearing and is used for maintaining the balance of the whole sensor.
Optionally, the ratio of the total weight to the total volume of the sensor is equal to the density of the surrounding soil mass.
In a second aspect, the present invention provides a method for measuring dynamic relative sliding between soil and an underground structure contact interface, which is applied to the above-mentioned sensor for measuring dynamic relative sliding between soil and an underground structure contact interface, the method includes:
the protective cover is arranged to be in contact with the tested soil body, and the slide rail is arranged to be fixedly connected with the underground structure to be tested;
when the protective cover is pushed by relative sliding between the soil body and the underground structure caused by external action; the protective cover drives the limiting idler wheel to rotate along the direction of the slide rail;
the limiting roller drives a wheel shaft inserted into the rolling bearing to rotate, and the angular displacement sensor connected with the wheel shaft is caused to generate angular displacement;
and converting the angle deviation value measured by the angular displacement sensor to obtain the tangential relative slippage of the contact interface of the soil and the underground structure.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model provides a measure sensor that soil and underground structure contact interface developments relative slip, the simple structure of whole sensor, detect convenient operation, the range is big, waterproof and separate native performance good, the accuracy is high. In the alternative, can set up the utility model discloses the total density of sensor equals surrounding environment soil body density to ensure that the sensor can reflect and measure the true motion of the soil body.
2. The sensor of the utility model has no damage to the underground structure to be measured, and does not change the self rigidity and other parameters of the underground structure; the utility model discloses the sensor is small, even the embedding can not influence the wholeness of soil body motion in the soil body of reduced scale model test yet.
3. The utility model discloses the sensor is applicable to the underground structure contact surface of different grade type (for example plane, curved surface and various dysmorphism face), can measure unearthed dynamic relative sliding displacement volume with underground structure accurately.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of a sensor for measuring dynamic relative slippage of a contact interface between soil and an underground structure provided by an embodiment of the present invention.
In the figure:
1-a slide rail;
2-a protective cover;
3-limiting rollers;
4-rolling bearings;
5-angular displacement sensor.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a sensor for measuring dynamic relative slippage of a contact interface between soil and an underground structure provided by an embodiment of the present invention. Referring to fig. 1, the sensor in the present embodiment may include: the device comprises a sliding rail 1, a protective cover 2, a limiting roller 3, a rolling bearing 4 and an angular displacement sensor 5; wherein: the sliding rail 1 is fixed on the surface of the structure, the limiting idler wheel 3 is embedded in the sliding rail 1, the rolling bearing 4 is embedded in the opening part of the side wall of the protective cover 2, and the angular displacement sensor 5 is fixed in the protective cover 2; the protective cover 2 is in direct contact with the soil body to form a space for accommodating the whole sensor, and the effect of isolating the soil body to protect the sensor is achieved.
In an optional implementation mode, the slide rail can be bent directly, the curvature of the contact surface of the slide rail and the structure is consistent, the slide rail and the contact surface of the underground structure are connected and fixed through structural glue or bolts, and a contact layer such as a rack or rubber is arranged in the slide rail, so that the sliding friction between the slide rail and the limiting roller is increased, and the limiting roller is ensured to rotate only in the slide rail.
In an alternative embodiment, the protective cover is a square box cover with openings on the side wall, the height and the volume of the box cover are as small as possible so as to accurately measure the tangential slippage of the soil and the structure contact interface, the bottom surface of the protective cover is close to the surface of the underground structure, and a proper gap is kept so as to ensure that the sensor does not touch the underground structure in the working process.
In an alternative embodiment, the limiting roller may be a gear or a rubber roller corresponding to different types of contact layers such as racks or rubber arranged in the slide rail. The limiting idler wheel consists of two idler wheels and an axle, the idler wheels are embedded in the slide rails and can only rotate along the arrangement direction of the slide rails, and the axle penetrates through the rolling bearing and is connected with the rotating shaft of the angular displacement sensor.
In an alternative embodiment, the rolling bearing is embedded in a lateral opening of the protective cover, the interior of which is penetrated by the limiting roller axle.
In this embodiment, slide rail 1 is fixed in the structural surface, and spacing gyro wheel 3 is embedded in slide rail 1, antifriction bearing 4 is embedded in safety cover 2, places safety cover 2 in the angular displacement sensor 5.
The displacement measuring device provided by the embodiment requires that the total density of the whole device is the same as the density of the soil body in the surrounding environment, so that the sensor can accurately reflect and measure the dynamic characteristics of the soil body.
The present embodiment provides a displacement measurement sensor, which is suitable for the case where the contact surface is a plane, a curved surface, or various irregular surfaces, and can measure and convert the tangential displacement component of the soil body along the cross section of the underground structure.
Additionally, the embodiment of the utility model provides a still provide a displacement measurement method, can be applied to in the displacement measurement sensor of any preceding, the method includes:
step 1: the slide rail 1 is fixed and tightly attached to the structure contact surface through structural glue or bolts, and the shape of the slide rail can be changed according to the shape of the structure contact surface (such as a plane or a curved surface), so that the curvature of the contact surface of the slide rail and the underground structure is consistent.
Step 2: the protective cover 2 is arranged to be in contact with a tested soil body, and the slide rail 1 is arranged to be fixedly connected with a tested underground structure;
and step 3: the protective cover 2 is pushed to slide on the surface of the structure through the relative sliding between the soil body and the underground structure; the protective cover slides to drive the limiting idler wheel 3 to rotate along the arrangement direction of the slide rail 1;
and 4, step 4: the limiting idler wheel 3 drives a wheel shaft inserted into the rolling bearing 4 to rotate, and the angular displacement sensor 5 connected with the wheel shaft is triggered to work;
and 5: the angular displacement sensor 5 measures and outputs a rotation angle value generated by rotation of a rotating shaft in real time;
step 6: and converting the rotation angle value measured by the angular displacement sensor 5 to obtain the tangential relative slippage of the contact interface of the soil and the underground structure.
The utility model provides a sensor simple structure, it is small, convenient operation, the range is great, to being surveyed the underground structure not damaged, does not influence the self rigidity isoparametric of underground structure to can be applicable to the underground structure contact surface (for example plane, curved surface and various dysmorphism face) of different grade type, can measure out accurately through the conversion with the contact surface tangential dynamic relative sliding displacement volume of underground structure.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict. The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (6)
1. A sensor for measuring dynamic relative slippage of a soil and subterranean structure contact interface, comprising: the device comprises a sliding rail (1), a protective cover (2), a limiting roller (3), a rolling bearing (4) and an angular displacement sensor (5); the limiting idler wheels (3) are positioned on two sides of the protective cover (2); the protective cover (2) is of a hollow structure and is used for accommodating the angular displacement sensor (5), and a group of side walls opposite to the protective cover (2) are provided with openings; the rolling bearing (4) penetrates through an opening of the protective cover (2); the limiting idler wheel (3) comprises an idler wheel and a wheel shaft; the wheel shaft penetrates through the rolling bearing (4) and is connected with a rotating shaft of the angular displacement sensor (5); wherein:
the sliding rail (1) is fixed on a contact surface of an underground structure, and the roller is embedded in the sliding rail (1) and used for limiting the roller to rotate according to the direction of the sliding rail (1); the rolling bearing (4) is embedded in the position of the opening of the protective cover (2); a rotating shaft of the angular displacement sensor (5) is in transmission connection with the rolling bearing (4), and the rotating shaft of the angular displacement sensor (5) is parallel to a test surface; when the dynamic relative slippage of the contact interface of the measuring soil and the underground structure is measured, the angular displacement sensor (5) is driven by the limiting roller (3) to generate angular deviation, and the angular deviation is used for representing the dynamic relative slippage of the contact interface of the measuring soil and the underground structure.
2. The sensor for measuring the dynamic relative slippage of the contact interface of soil and an underground structure according to claim 1, wherein a contact layer is arranged in the sliding rail (1) and used for increasing the sliding friction force between the sliding rail (1) and the limiting roller (3).
3. The sensor for measuring the dynamic relative slippage of the contact interface of soil and an underground structure according to claim 1, wherein the sliding rail (1) is fixed and tightly attached to the contact surface of the structure through structural glue or bolts, and the curvature of the contact surface of the sliding rail (1) and the underground structure is consistent.
4. The sensor for measuring the dynamic relative slippage of a contact interface of soil and an underground structure according to claim 1, wherein the clearance between the bottom surface of the protective cover (2) and the surface of the underground structure is within a preset range.
5. The sensor for measuring the dynamic relative slippage of the contact interface of the soil and the underground structure according to claim 1, wherein the roller axle of the limiting roller (3) on one side of the protective cover (2) is inserted into the rolling bearing (4), and the roller axle of the limiting roller (3) on the other side of the protective cover (2) is also inserted into the rolling bearing (4) for maintaining the balance of the whole sensor.
6. The sensor of claim 1, wherein the ratio of the total weight to the total volume of the sensor is equal to the density of the surrounding soil mass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920897555.9U CN210293156U (en) | 2019-06-14 | 2019-06-14 | Sensor for measuring dynamic relative slip of contact interface of soil and underground structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920897555.9U CN210293156U (en) | 2019-06-14 | 2019-06-14 | Sensor for measuring dynamic relative slip of contact interface of soil and underground structure |
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| CN210293156U true CN210293156U (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243328A (en) * | 2019-06-14 | 2019-09-17 | 上海交通大学 | The sensor and method of measurement soil and underground structure contact interface dynamic Relative sliding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243328A (en) * | 2019-06-14 | 2019-09-17 | 上海交通大学 | The sensor and method of measurement soil and underground structure contact interface dynamic Relative sliding |
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