CN221260192U - Soil pressure testing device for supporting structure model test - Google Patents
Soil pressure testing device for supporting structure model test Download PDFInfo
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- CN221260192U CN221260192U CN202323371205.4U CN202323371205U CN221260192U CN 221260192 U CN221260192 U CN 221260192U CN 202323371205 U CN202323371205 U CN 202323371205U CN 221260192 U CN221260192 U CN 221260192U
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- 239000002689 soil Substances 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 94
- 239000010959 steel Substances 0.000 claims abstract description 94
- 239000002023 wood Substances 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 22
- 239000004568 cement Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 244000035744 Hura crepitans Species 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
Abstract
The utility model discloses a soil pressure testing device for a supporting and retaining structure model test, which comprises a cuboid steel frame, wherein two parallel reaction frames are longitudinally arranged at one end of the steel frame, side wall boards are arranged in the steel frame, and a retaining board is longitudinally arranged in the steel frame; a reinforcing steel bar stress meter is horizontally arranged between the reaction frame and the soil-retaining wood board; the top of the steel frame is also provided with a dial indicator, the dial indicator is connected with the top of the steel frame through a connecting piece, and the end part of the dial indicator is contacted with the soil retaining wood plate; and steel bar supports are arranged at the bottom of the steel frame. Compared with the prior art, the utility model has the advantages that: the test device has the advantages of simple structure, clear principle, low manufacturing cost, very easy material drawing and manufacturing, and accurate test of three types of soil pressure on the soil retaining structure, namely active soil pressure, static soil pressure and passive soil pressure, by using conventional test materials and equipment.
Description
Technical Field
The utility model relates to the technical field of supporting and retaining structure design, calculation and construction of side slopes, retaining walls and foundation pit engineering, in particular to a soil pressure testing device and method used in supporting and retaining structure model test.
Background
The distribution form of the earth pressure behind the wall is an important reference basis for the design and construction of the retaining wall, the difference of the displacement forms of the wall has important influence on the distribution of the active earth pressure behind the wall, the earth pressure is calculated by Rankine and Coulomb earth pressure theory for many years, but the actual measurement accuracy of the earth pressure is limited by the actual condition on site and the limitation of test equipment, the accurate test is difficult, the accurate real earth pressure is difficult to obtain due to the size effect of a model box, and the control of the displacement mode of the retaining wall is not easy to realize in the process of testing the active earth pressure and the passive earth pressure, so that the proper method and the reasonable model construction are particularly important.
Therefore, it is necessary to design a model test device which is easy to operate and has high accuracy and can accurately reflect static, active and passive earth pressures in different displacement modes.
Disclosure of utility model
The utility model aims to solve the problems in the background art and provides a soil pressure testing device and a soil pressure testing method for a supporting structure model test.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the soil pressure testing device for the supporting structure model test comprises a cuboid steel frame, wherein two parallel reaction frames are longitudinally arranged at one end of the steel frame, a side wall wood plate is arranged in the steel frame, a retaining wood plate is longitudinally arranged in the steel frame, the width of the retaining wood plate is consistent with the inner width of the steel frame, a plumb is arranged in the steel frame, and the reaction frames and the retaining wood plate are higher than the top of the steel frame;
Two steel bar stress meters are horizontally arranged between the counter-force frame and the soil-retaining wood board, through holes are formed in the parallel positions of the counter-force frame and the upper part of the soil-retaining wood board, and steel bars of the steel bar stress meters pass through and are connected with the counter-force frame and the soil-retaining wood board through screw gaskets and screws;
the top of the steel frame is also provided with a dial indicator, the dial indicator is connected with the top of the steel frame through a connecting piece, and the end part of the dial indicator is contacted with the soil retaining wood plate;
The steel frame bottom is equipped with the billet and supports, billet supports one end and supports the bottom of retaining plank, and the other end supports and leans on the steel frame is inboard for the displacement of restriction retaining plank bottom.
As a preferable scheme, the steel frame is formed by welding angle steel, the length and the height of the steel frame are equal, and the aspect ratio is 1:2.
As a preferable scheme, the reaction frame is a channel steel and is welded on one side of the steel frame.
As a preferable scheme, the side wall wood plates are inlaid on the inner side of the steel frame, and the joint of the side wall wood plates and the steel frame is sealed by glass cement and is fixed in an auxiliary mode through battens.
As a preferable scheme, the aperture of the through hole is larger than the diameter of the steel bar stress meter.
As a preferable scheme, the steel bars at the two ends of the steel bar stress gauge are respectively provided with threads with the length of 10 cm-20 cm, so that the screw can be screwed conveniently.
Compared with the prior art, the utility model has the advantages that:
The utility model has simple structure, convenient material taking, low manufacturing cost and convenient disassembly and assembly, is suitable for model tests of various kinds of soil, has simple operation process, convenient boundary condition control, easy backfill filling and excavation, and is beneficial to the embedding of various sensors;
The method improves the traditional method for testing the soil pressure, greatly improves the accuracy of measured data, uses the reinforcing steel bar stress meter, accurately measures the lateral soil pressure born by the soil retaining structure by utilizing the axial tension born by the reinforcing steel bar stress meter, and reduces errors caused by dimensional effects and the precision problem of the pressure sensor;
The utility model can realize the soil pressure test of the soil retaining structure under three working conditions of active, static and passive, can also be combined with other working conditions such as external load, and can accurately realize the control of the top displacement of the soil retaining structure by tightening and loosening the screws, and greatly save time and workload on the premise of not influencing the accuracy of test results.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a front view of the present utility model.
As shown in the figure: 1. steel frame, 2, reaction frame, 3, lateral wall plank, 4, keep off soil plank, 5, screw, 6, screw gasket, 7, steel bar stress meter, 8, percentage table, 9, steel bar support, 10, filling.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present utility model, "plurality" means at least 2.
In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to the attached drawings, the soil pressure testing device for the supporting structure model test comprises a cuboid steel frame 1, wherein two parallel reaction frames 2 are longitudinally arranged at one end of the steel frame 1, side wall boards 3 are arranged in the steel frame 1, a retaining board 4 is longitudinally arranged in the steel frame 1, the width of the retaining board 4 is consistent with the inner width of the steel frame 1, a plumb is arranged in the steel frame 1, and the reaction frames 2 and the retaining board 4 are higher than the top of the steel frame 1;
two steel bar stress meters 7 are horizontally arranged between the counter-force frame 2 and the soil-retaining wood board 4, through holes are formed in parallel positions of the upper parts of the counter-force frame 2 and the soil-retaining wood board 4, and steel bars of the steel bar stress meters 7 pass through and are connected with the counter-force frame 2 and the soil-retaining wood board 4 through screw gaskets 6 and screws 5;
the top of the steel frame 1 is also provided with a dial indicator 8, the dial indicator 8 is connected with the top of the steel frame 1 through a connecting piece, and the end part of the dial indicator 8 contacts the soil retaining wood board 4;
The bottom of the steel frame 1 is provided with a steel bar support 9, one end of the steel bar support 9 props against the bottom of the soil-retaining wood board 4, and the other end of the steel bar support 9 props against the inner side of the steel frame 1 and is used for limiting the bottom displacement of the soil-retaining wood board 4.
The steel frame 1 is formed by welding angle steel, the length and the height of the steel frame 1 are equal, and the aspect ratio is 1:2.
The reaction frame 2 is a channel steel and is welded on one side of the steel frame 1.
The side wall wood board 3 is inlaid at the inner side of the steel frame 1, and the joint of the side wall wood board 3 and the steel frame 1 is sealed by glass cement and is fixed in an auxiliary manner through battens.
The aperture of the through hole is larger than the diameter of the steel bar stress meter 7.
The steel bars at the two ends of the steel bar stress meter 7 are respectively provided with threads with the length of 10 cm-20 cm so as to facilitate screwing the screw 5.
The utility model, when embodied, comprises the following steps:
1) Installing, debugging and testing device: the soil-retaining plank 4 is erected in a sandbox formed by the steel frame 1 and the side wall templates, two sides of the soil-retaining plank are tightly attached to the side wall planks 3, the bottom of the soil-retaining plank 4 is supported by two steel bar supports 9, the other ends of the steel bar supports 9 are arranged on the wall of the steel frame 1, one ends of the steel bar stress gauges 7 penetrate into through holes of the counter-force frame 2, the other ends penetrate into through holes in the upper part of the soil-retaining plank 4, the two ends of the soil-retaining plank are respectively screwed and fixed firmly by screw gaskets 6 and screws 5, and then the dial indicators 8 are placed in parallel at the position where the soil-retaining plank 4 is flush with the steel frame 1;
2) Filling soil and measuring and calculating static soil pressure: the horizontal displacement and stress of the soil-retaining plank 4 are controlled to be zero, soil 10 is layered in the sandy soil box and filled to the level of the top of the steel frame 1, the reading of the reinforcing steel bar stress meter 7 at the moment is recorded, and the static soil pressure E 0 born by the soil-retaining plank 4 can be obtained after conversion;
3) Measuring and calculating the active soil pressure: after the reading of the static soil pressure test is stable, starting to unscrew the screw 5 at the rear side of the reaction frame 2, horizontally moving the soil-retaining wood board 4 to the outside, synchronously observing the reading on the dial indicator 8, stopping loosening the screw 5 when the displacement of the soil-retaining wood board 4 reaches the active limit balance position, recording the reading of the reinforcing steel bar stress meter 7 at the moment, and obtaining the active soil pressure E a of the soil-retaining wood board 4 after conversion;
4) And measuring and calculating the passive soil pressure: after the static soil pressure is stable, the reinforcing steel bar stress gauge 7 is reversely tensioned, so that the soil retaining wood board 4 is displaced towards the direction of the compressed filling soil 10, the readings on the dial indicator 8 are synchronously observed, when the displacement reaches the passive limit balance position, the screw 5 is screwed down, the readings of the reinforcing steel bar stress gauge 7 at the moment are recorded, and the passive soil pressure E p borne by the soil retaining wood board 4 can be obtained after conversion.
Different from the traditional soil pressure box test, the stress meter drawknot soil retaining plate method is used for measuring the static soil pressure, the active soil pressure and the passive soil pressure converted by the axial tensile stress;
Standing the rigid soil-retaining wood board, and converting the soil pressure born by the board into static, active and passive soil pressure through the axial tensile stress born by the drawknot stress meter;
Standing a rigid soil-retaining plank in the sandy soil box, transversely installing a stress meter and a displacement meter on the upper part of the soil-retaining plank, and measuring the horizontal displacement and stress of the baffle;
The horizontal displacement and stress of the retaining wood plate are controlled to be zero, soil is filled in layers in the baffle plates, the baffle plates are stressed in layers, the displacement is zero at the moment, and the measured stress change is converted to obtain the static soil pressure;
The screw is loosened and tied on the soil retaining plate, so that the soil retaining plate is horizontally displaced outwards, the displacement of the top of the baffle is controlled by the displacement reading of the dial indicator, and the position of the active soil pressure change and the limit balance displacement under different displacement conditions can be more accurately obtained.
The screw is screwed on the soil retaining plate, so that the soil retaining plate horizontally displaces inwards, the displacement of the top of the baffle is controlled by the displacement reading of the dial indicator, and the position of the passive soil under different displacement conditions when the pressure of the passive soil changes and the limit balance displacement is obtained more accurately.
The utility model relates to the technical design, calculation and construction fields of retaining structures for side slopes, retaining walls and foundation pit engineering, and can measure static soil pressure, active soil pressure and passive soil pressure, in particular to a soil pressure test model test for retaining structures.
The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution will not be creatively devised without departing from the gist of the present utility model, and the structural manner and the embodiment are all intended to be within the protection scope of the present utility model.
Claims (6)
1. A soil pressure testing arrangement for in retaining structure model test, its characterized in that: the steel frame comprises a cuboid steel frame, two parallel reaction frames are longitudinally arranged at one end of the steel frame, a side wall wood plate is arranged in the steel frame, a soil retaining wood plate is longitudinally arranged in the steel frame, the width of the soil retaining wood plate is consistent with the inner width of the steel frame, a plumb is placed in the steel frame, and the reaction frames and the soil retaining wood plate are higher than the top of the steel frame;
Two steel bar stress meters are horizontally arranged between the counter-force frame and the soil-retaining wood board, through holes are formed in the parallel positions of the counter-force frame and the upper part of the soil-retaining wood board, and steel bars of the steel bar stress meters pass through and are connected with the counter-force frame and the soil-retaining wood board through screw gaskets and screws;
the top of the steel frame is also provided with a dial indicator, the dial indicator is connected with the top of the steel frame through a connecting piece, and the end part of the dial indicator is contacted with the soil retaining wood plate;
The steel frame bottom is equipped with the billet and supports, billet supports one end and supports the bottom of retaining plank, and the other end supports and leans on the steel frame is inboard for the displacement of restriction retaining plank bottom.
2. The soil pressure testing device for use in a model test of a retaining structure according to claim 1, wherein: the steel frame is formed by welding angle steel, the length and the height of the steel frame are equal, and the aspect ratio is 1:2.
3. The soil pressure testing device for use in a model test of a retaining structure according to claim 1, wherein: the reaction frame is channel steel and welded on one side of the steel frame.
4. The soil pressure testing device for use in a model test of a retaining structure according to claim 1, wherein: the side wall wood board is inlaid on the inner side of the steel frame, and the joint of the side wall wood board and the steel frame is sealed by glass cement and is fixed in an auxiliary mode through battens.
5. The soil pressure testing device for use in a model test of a retaining structure according to claim 1, wherein: the aperture of the through hole is larger than the diameter of the steel bar stress meter.
6. The soil pressure testing device for use in a model test of a retaining structure according to claim 1, wherein: the steel bars at the two ends of the steel bar stress gauge are respectively provided with threads with the length of 10 cm-20 cm, so that the screw can be screwed conveniently.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221260192U true CN221260192U (en) | 2024-07-02 |
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