CN215447825U - Slope displacement testing arrangement in centrifugal model test - Google Patents
Slope displacement testing arrangement in centrifugal model test Download PDFInfo
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- CN215447825U CN215447825U CN202121113141.6U CN202121113141U CN215447825U CN 215447825 U CN215447825 U CN 215447825U CN 202121113141 U CN202121113141 U CN 202121113141U CN 215447825 U CN215447825 U CN 215447825U
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Abstract
The utility model discloses a slope displacement testing device in a centrifugal model test, which comprises a model box, wherein a slope soil body is placed in an inner cavity of the model box, a sensor fixing plate is connected to the inner wall of one side of the model box, the sensor fixing plate is of a triangular plate structure, the inclined edge of the sensor fixing plate faces the inclined edge of the slope soil body, a plurality of displacement sensors are detachably connected to the sensor fixing plate, the displacement sensors are sequentially arranged along the inclined edge of the sensor fixing plate, and the detection ends of the displacement sensors are in contact with the inclined edge of the slope soil body. The utility model adopts the steel plate with the triangular bevel edge parallel to the side slope to fix the displacement sensor, and sets a plurality of groups of bolt holes for arranging the displacement sensor at different heights of the bevel edge, the bevel edge of the sensor fixing plate is easier to measure corresponding to the bevel edge of the side slope soil body, the efficiency of adjusting the sensor is more efficient, a plurality of displacement sensors respectively correspond to different depths, the measurement is convenient and fast, and the working efficiency is higher.
Description
Technical Field
The utility model belongs to the technical field of centrifugal models, and particularly belongs to a slope displacement testing device in a centrifugal model test.
Background
With the rapid development of social economy, the construction of highways is rapidly developed, the highways network is gradually dense, and the construction gravity center of the highways is gradually inclined from urban roads to mountain roads. The construction of mountain roads is often accompanied by high fill and deep excavation of earthwork, so that a high slope is inevitably formed. The potential safety hazard of the high road slope is not only that the dynamic compaction of the soil body can cause the slope collapse in the construction process, but also that the slope can be unstable due to long-term geological weathering and the continuous action of various loads after the construction is finished. This not only has caused the hindrance to the normal construction of highway, operation, also can cause huge harm to pedestrian, vehicle passing. Therefore, the displacement of the side slope is accurately measured, and the method is particularly important for regularly summarizing the stability of the side slope under various actions.
At present, there are many methods for monitoring slope displacement on site, such as surface GPS, TDR technology, embedded fiber deployment, and survey of slope displacement. But the displacement measurement of the model slope in the centrifugal model test is very single. Displacement measurement of a slope is usually performed by mounting a displacement sensor on a fixed vertical rod. However, when the slope gradient is moderate and the slope is required to be monitored at multiple depths at the same time, the method is inconvenient to operate.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a slope displacement testing device in a centrifugal model test, which solves the problem that slope displacement is difficult to measure at multiple depths in the existing centrifugal model test.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a side slope displacement testing arrangement among centrifugal model test, includes the mold box, the side slope soil body has been placed in the inner chamber of mold box, be connected with the sensor fixed plate on one side inner wall of mold box, the sensor fixed plate is the set-square structure, the hypotenuse of sensor fixed plate is towards the hypotenuse of side slope soil body, can dismantle on the sensor fixed plate and be connected with a plurality of displacement sensor, displacement sensor arranges in proper order along the hypotenuse of sensor fixed plate, displacement sensor's detection end contacts the hypotenuse of side slope soil body.
Further, the top of the model box is detachably connected with a device fixing plate.
Further, the device fixing plate is an L-shaped steel plate.
Furthermore, the top end face of the sensor fixing plate is detachably connected with the device fixing plate.
Furthermore, a plurality of rows of first bolt holes are formed in the length direction of the end face of the top end of the sensor fixing plate, two rows of second bolt holes are formed in the device fixing plate, and any two rows of first bolt holes are connected with the second bolt holes.
Furthermore, the bevel edge of the sensor fixing plate is parallel to the bevel edge of the slope soil body.
Furthermore, the displacement sensor is contacted with the side slope soil body through a flexible gasket, and the flexible gasket is positioned between the displacement sensor and the side slope soil body.
Furthermore, the displacement sensor adopts a KTR self-reset linear displacement sensor.
Further, the displacement sensor is in a horizontal position.
Furthermore, the displacement sensor and the sensor fixing plate are detachably connected through a bolt.
Compared with the prior art, the utility model has at least the following beneficial effects:
the utility model provides a side slope displacement testing device in a centrifugal model test, wherein a sensor fixing plate is connected on the inner wall of a model box, a plurality of displacement sensors are arranged on the sensor fixing plate and respectively correspond to different depth measurement requirements, and meanwhile, the sensor fixing plate is of a triangular plate structure, so that the traditional vertical rod is difficult to realize when the slope gradient is moderate and displacement measurement needs to be carried out on a plurality of depths of the slope simultaneously. This device has adopted the steel sheet of the triangle hypotenuse that parallels with the side slope to fix displacement sensor to set up the bolt hole that displacement sensor was settled to the multiunit in hypotenuse co-altitude department, thereby solve this problem smoothly, when a plurality of degree of depth of the opposite side slope soil body are measured, the hypotenuse that the hypotenuse of sensor fixed plate corresponds the side slope soil body measures more easily, and the efficiency of adjusting the sensor is more high-efficient, and a plurality of displacement sensor correspond different degree of depth departments respectively, measure convenient and fast, and work efficiency is higher.
Furthermore, the connecting device fixing plate can be dismantled at the top of the model box, so that the inside of the model box can be conveniently adjusted.
Further, the device fixed plate is L-shaped steel plate and is matched with the model box, so that stable connection can be guaranteed, the device fixed plate is convenient to grab, and the device fixed plate is convenient to disassemble and assemble.
Furthermore, the sensor fixed plate is connected with the device fixed plate, any two rows of bolt holes in a plurality of rows of first bolt holes on the sensor fixed plate can be connected with the device fixed plate, when the road width changes, the side slope soil body also moves correspondingly on the horizontal plane, and because the traditional vertical rod is directly connected with the model box, when the side slope corresponding to the road width of the same road section with different widths needs to be analyzed, the fixed vertical rod needs to be moved again sometimes, and the fixing of the vertical rod often depends on the bolt holes of the model box, so the fixing device has great limitation, and the situation that the vertical rod just has proper bolt holes on the model box in the process of moving along with the side slope soil body is difficult to ensure to be fixed on the model box. The upper end of the sensor fixing triangular plate of the device adopts the design of a plurality of rows of first bolt holes, the sensor is free to move to a larger degree, and the positions of the first bolt holes and the second bolt holes can be adjusted along with the movement of a side slope soil body, so that the device can meet the test of measuring side slope displacement in various centrifugal model tests.
Furthermore, the bevel edge of the sensor fixing plate is parallel to the bevel edge of the side slope soil body, and the displacement sensor is in a horizontal position, so that the accuracy of test data can be ensured, and the reliability of the test data is improved.
Furthermore, the displacement sensor is in contact with the slope soil body through the flexible gasket, so that the data accuracy can be improved.
In summary, the beneficial effects of the utility model are mainly as follows: on the one hand, through a plurality of bolt hole sites on two device boards for can adjust the distance of sensor and side slope in a flexible way in the measurement side slope process. On the other hand, the bevel edge design of the sensor fixing plate is matched with the actual model structure of the engineering more in a matching mode. Through the improvement on the fixing device, the defects of the traditional testing device are overcome to a large extent, the adaptability is stronger when various complex working conditions are met, and the reliability of the tested data is also better guaranteed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the fixing plate of the device;
FIG. 3 is a schematic structural diagram of a sensor fixing plate;
in the drawings: 1-mold box, 2-device retainer plate, 3-sensor retainer plate, 4-displacement sensor, 5-slope soil, 6-device retainer plate bolt hole, 7-first bolt hole, 71-first row first bolt hole, 72-second row first bolt hole, 73-third row first bolt hole, 74-fourth row first bolt hole, 75-fifth row first bolt hole, 8-second bolt hole, 81-first row second bolt hole, 82-second row second bolt hole.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
As shown in fig. 1, the present invention provides a slope displacement testing device in a centrifugal model test, which comprises a model box 1, a device fixing plate 2, a sensor fixing plate 3 and a displacement sensor 4, wherein the model box 1 is an existing model box in a geotechnical laboratory, and is a cuboid test box; the device fixing plate 2 is of an L-shaped steel plate structure, device fixing plate bolt holes 6 are formed in the terminal ends of the short side and the long side of the L-shaped steel plate structure, and the device fixing plate bolt holes 6 are used for fixing the L-shaped steel plate to the model box 1; the sensor fixing plate 3 is of a triangular plate structure, bolt holes are formed in the top end plane of the sensor fixing plate 3 and the vertical triangular bevel edge, the bolt hole in the upper end plane is a first bolt hole 7, the first bolt hole 7 is used for being connected with the device fixing plate 2, and the bolt hole in the vertical triangular bevel edge is used for fixing the displacement sensor 4;
example 1
Specifically, as shown in fig. 2, the device fixing plate 2 is located above the opposite side of the slope soil 5, for fixing the whole device on the model box 1 through bolt holes, two rows of second bolt holes 8 are arranged on the top plane of the device fixing plate 2, namely a first row of second bolt holes 81 and a second row of second bolt holes 82, the sensor fixing plate 3 is positioned below the device fixing plate 2, a plurality of rows of displacement sensors 4 are arranged on the bevel edge of the sensor fixing plate 3, the bevel edge of each sensor is parallel to the bevel edge of the slope soil body 5, the displacement sensors 4 are positioned at the horizontal position, in this embodiment, the displacement sensor 4 is a high-precision KTR self-resetting linear displacement sensor, the displacement sensor 4 is in contact with the bevel edge of the slope soil 5, preferably, the displacement sensor 4 is in contact with the slope soil 5 through a flexible gasket, and the flexible gasket 5 is located between the displacement sensor 4 and the slope soil 5.
Specifically, as shown in fig. 3, a plurality of rows of first bolt holes 7 are arranged on the top end plane of the sensor fixing plate 3, two rows of second bolt holes 7 are arranged on the device fixing plate 2, and any two rows of first bolt holes 7 are connected with the second bolt holes 8, in this embodiment, five rows of first bolt holes 7 are arranged on the sensor fixing plate 3, which are respectively a first row of first bolt holes 71, a second row of first bolt holes 72, a third row of first bolt holes 73, a fourth row of first bolt holes 74 and a fifth row of first bolt holes 75, so that when the road width changes, the slope also moves correspondingly on the horizontal plane, and the position of the displacement sensor 4 is adjusted by adjusting any two rows of first bolt holes 7 in the five rows of first bolt holes 7 to be connected with the second bolt holes 8.
The overall steps of the device for testing the displacement of the model soil slope in the embodiment are as follows:
firstly, constructing a model slope soil body 5. The method specifically comprises the following steps: and scaling the slope to be analyzed on the construction site road section according to various similar constants in the centrifugal model test, so as to construct a model slope soil body 5 in the model box 1 by using the data obtained by calculation.
And secondly, mounting a device fixing plate 2. The method specifically comprises the following steps: firstly, horizontally placing the device fixing plate 2 on the model box 1 above the opposite side of the model soil body 5, secondly, corresponding the device fixing plate bolt holes 6 on the device fixing plate 2 with the bolt holes on the model box 1 one by one, and finally inserting bolts to fix the device fixing plate.
And thirdly, mounting a sensor fixing plate 3 and a displacement sensor 4. The method specifically comprises the following steps: the sensor fixing plate 3 is placed under the device fixing plate 2 in a manner of being perpendicular to the bottom surface of the model box 1, and the corresponding triangular bevel edge of the sensor fixing plate is parallel to the model soil slope 5. The relative positions thereof are adjusted so that the third row of first bolt holes 73 and the fifth row of first bolt holes 75 on the upper end surface of the sensor fixing plate 3 are respectively aligned with the first row of second bolt holes 81 and the second row of second bolt holes 82 of the device fixing plate 2, and bolts are inserted and fixed. 4 KTRs are horizontally arranged on the sensor fixing plate 3 from a reset type linear displacement sensor 4, so that the sensor fixing plate can just contact with a slope soil body 5 (in order to enable data to be accurate, a flexible gasket is usually placed at the contact position of the displacement sensor 4 and the slope soil body 5).
Connecting the KTR self-reset linear displacement sensor 4 with a program-controlled static strain gauge, and recording primary initial data. After all the parts are ready, a loading plate is placed on the model soil body 5, the whole model box 1 is placed in a centrifugal machine, the displacement sensor 4 is connected with the centrifugal machine at the moment, the centrifugal machine is adjusted to generate the required centrifugal force, and finally the slope displacement and the stability under the corresponding load are analyzed according to the acquired data.
Example 2
The difference with embodiment 1 lies in that the influence of precipitation on the displacement of the earth slope and the displacement monitoring of the earth slope under the conditions of different road widths on the same road section are additionally analyzed in the embodiment. When the road width is reduced, if the slope of the road section is not changed, the slope of the road section is bound to move correspondingly. In the implementation steps in this embodiment, when constructing the side slope soil body 5, the corresponding side slope is moved inward by 5 cm. The mounting device fixing plate 2 is the same as in embodiment 1. When the sensor fixing plate 3 is attached, the first row second bolt holes 81 and the second row second bolt holes 82 of the device fixing plate 2 are placed in correspondence with the second row first bolt holes and the fourth row first bolt holes of the sensor fixing plate 3, and fixed in the same manner as in example 1. In the last step, before the model box 1 is put into the centrifuge, the calculated water amount can be continuously and uniformly sprayed to the slope soil 5 by spraying for a certain time, and the rest of the operation is the same as that of the embodiment 1.
Example 3:
the difference between this embodiment and embodiments 1 and 2 is that the slope is constructed by a further 5cm inward on the basis of embodiment 2 when the slope soil 5 is constructed. The operation of attaching the sensor fixing plate 3 is the same as that of example 2 except that the first row second bolt holes 81 and the second row second bolt holes 82 of the device fixing plate 2 are overlapped with and fixed to the first row first bolt holes 71 and the third row first bolt holes 73 of the sensor fixing plate 3.
The device can measure different depth soil bodies of the side slope with a slow gradient at the same time, and can monitor and analyze the displacement of the side slope under the condition that the road width changes and the side slope moves, so that the test time and equipment are saved to a certain extent, the efficiency is improved, and powerful help is provided for the analysis of the actual working condition.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a side slope displacement testing arrangement among centrifugal model test, a serial communication port, includes mold box (1), place side slope soil body (5) in the inner chamber of mold box (1), be connected with sensor fixed plate (3) on one side inner wall of mold box (1), sensor fixed plate (3) are the triangle plate structure, the hypotenuse of sensor fixed plate (3) is towards the hypotenuse of side slope soil body (5), can dismantle on sensor fixed plate (3) and be connected with a plurality of displacement sensor (4), displacement sensor (4) are arranged in proper order along the hypotenuse of sensor fixed plate (3), the hypotenuse of side slope soil body (5) is contacted in the detection end of displacement sensor (4).
2. The slope displacement testing device in the centrifugal model test according to claim 1, characterized in that a device fixing plate (2) is detachably connected to the top of the model box (1).
3. The slope displacement testing device in the centrifugal model test according to claim 2, characterized in that the device fixing plate (2) is an L-shaped steel plate.
4. The slope displacement testing device in the centrifugal model test according to claim 2, wherein the top end face of the sensor fixing plate (3) is detachably connected with the device fixing plate (2).
5. The slope displacement testing device in the centrifugal model test according to claim 4, wherein a plurality of rows of first bolt holes (7) are formed in the length direction of the top end face of the sensor fixing plate (3), two rows of second bolt holes (8) are formed in the device fixing plate (2), and any two rows of first bolt holes (7) are connected with any two rows of second bolt holes (8).
6. A slope displacement testing device in centrifugal model test according to claim 1, characterized in that the oblique side of the sensor fixing plate (3) and the oblique side of the slope soil (5) are parallel.
7. The slope displacement testing device in the centrifugal model test according to claim 1, characterized in that the displacement sensor (4) is in contact with the slope soil (5) through a flexible gasket, and the flexible gasket is positioned between the displacement sensor (4) and the slope soil (5).
8. The slope displacement testing device in the centrifugal model test according to claim 1, wherein the displacement sensor (4) is a KTR self-resetting linear displacement sensor.
9. A slope displacement testing device in centrifugal model test according to claim 1, characterized in that the displacement sensor (4) is in horizontal position.
10. The slope displacement testing device in the centrifugal model test according to claim 1, wherein the displacement sensor (4) and the sensor fixing plate (3) are detachably connected through a bolt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121113141.6U CN215447825U (en) | 2021-05-21 | 2021-05-21 | Slope displacement testing arrangement in centrifugal model test |
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| CN202121113141.6U CN215447825U (en) | 2021-05-21 | 2021-05-21 | Slope displacement testing arrangement in centrifugal model test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950389A (en) * | 2023-03-15 | 2023-04-11 | 常州市建筑科学研究院集团股份有限公司 | Non-contact interference-free water and soil loss monitoring method |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950389A (en) * | 2023-03-15 | 2023-04-11 | 常州市建筑科学研究院集团股份有限公司 | Non-contact interference-free water and soil loss monitoring method |
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