CN210154925U - Roadbed soil compression resistance modulus of resilience testing arrangement - Google Patents
Roadbed soil compression resistance modulus of resilience testing arrangement Download PDFInfo
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- CN210154925U CN210154925U CN201920386821.1U CN201920386821U CN210154925U CN 210154925 U CN210154925 U CN 210154925U CN 201920386821 U CN201920386821 U CN 201920386821U CN 210154925 U CN210154925 U CN 210154925U
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Abstract
The utility model discloses a roadbed soil compression resistance resilience modulus testing device, which comprises a test mold for bearing a roadbed soil sample, a loading device for applying load to the roadbed soil sample, a distance measuring device for testing resilience displacement of the sample, a water tank for simulating a sample immersion environment and a bearing member for bearing the load applied by the loading device; the water tank is provided with a water inlet and a water outlet, and the test mold is arranged in the water tank; the bearing piece is arranged above the roadbed soil sample and below the loading device, and the load applied by the loading device is transmitted to the roadbed soil sample through the bearing piece. The utility model discloses a testing arrangement can simulate the road bed and at the bubble water state of operation in-process, has guaranteed that test result and actual value are more close. And through set up the limiting plate around the loading board for the loading process is stable, has promoted the accuracy of test result.
Description
Technical Field
The utility model belongs to the technical field of road engineering, a roadbed soil resistance to compression modulus of resilience testing arrangement is related to.
Background
The compression resistance and resilience modulus of the roadbed soil is a basic parameter for the design of road beds and road surface structures, and the bearing capacity and the engineering cost of the road structures are directly influenced by the correctness of the value of the modulus. If the value is higher than the actual value, the thickness of the designed road bed and the road surface is smaller, so that the bearing capacity of the road is insufficient, and the specified design life and service level cannot be met; if the value is lower than the actual value, the thickness of the designed road bed and the road surface is larger, and the resource consumption and the engineering cost are increased.
In order to accurately obtain the resilience modulus of the roadbed soil and ensure that the design is consistent with the actual state, the best method is to adopt an indoor testing method to test the resilience modulus of the roadbed soil. The current "road geotechnical test regulation" (JTG E40-2007) stipulates that the test is carried out by using a pavement strength meter method. The method comprises the steps of forming a cylindrical test piece indoors, loading and unloading the cylindrical test piece on the top surface of the test piece step by step, controlling loading pressure Pi by a pressure gauge or a force measuring ring, reading deformation Li after loading and unloading by a dial gauge, and then drawing a stress-load P-L curve to calculate a rebound modulus value. The testing method has the following defects in the testing process, which cause low testing precision, low testing speed and insufficient simulation actual conditions: (1) the method of recording the deformation of the test piece by the dial indicator and manually reading the record is adopted, so that the speed is low, the reading of the dial indicator is easily disturbed by the influence of environmental wind and vibration, the precision and the stability cannot be effectively guaranteed, and the result discreteness is very large; (2) only one test piece can be tested in each test, and the requirement of the parallelism test on at least 3 test pieces cannot be finished at one time, so that the test period is greatly increased; (3) without a water saturation device, the test process cannot simulate the huge influence of water on the resilience modulus of the roadbed soil, and the test result is inconsistent with the actual state of the roadbed soil, so that the deviation of the test result and the actual value is large.
Disclosure of Invention
Not enough to prior art exists, the utility model provides a roadbed soil resistance to compression modulus of resilience testing arrangement solves current modulus of resilience tester and can not simulate actual roadbed soil state and make the test result have great error.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
the utility model discloses a roadbed soil compression resistance resilience modulus testing device, which comprises a test mold for bearing a roadbed soil sample, a loading device for applying load to the roadbed soil sample, a distance measuring device for testing resilience displacement of the sample, a water tank for simulating a sample immersion environment and a bearing member for bearing the load applied by the loading device; the water tank is provided with a water inlet and a water outlet, and the test mold is arranged in the water tank; the bearing piece is arranged above the roadbed soil sample and below the loading device, and the load applied by the loading device is transmitted to the roadbed soil sample through the bearing piece.
Specifically, a plurality of test molds are arranged; the loading device comprises a jack for applying force, a plurality of first cantilevers and pressing blocks, the first cantilevers are arranged around the jack, the tail end of each first cantilever is connected with one pressing block, and the number of the pressing blocks is matched with the number of the test molds; the pressing block is positioned above the bearing piece.
Specifically, the water inlet of basin pass through inlet tube and water tank intercommunication, the delivery port passes through outlet pipe and water tank intercommunication, the inlet tube on be provided with the water pump, the outlet pipe on be provided with the valve.
Specifically, a heating device and a temperature sensor are arranged in the water tank.
Further, the device still includes the limiting plate, the limiting plate setting at the upper surface of examination mould road soil matrix sample, be provided with the trompil that supplies to hold the carrier and pass on the limiting plate, the limiting plate is used for restricting to hold the carrier and rocks in trying the mould.
Furthermore, the device also comprises a support frame, wherein the support frame comprises a base, a top plate and a pillar, the top plate is supported on the base through the pillar, the water tank is arranged on the base, and the loading device and the distance measuring device are hung above the test mold through the top plate.
Specifically, the water tank is of a sleeve structure, an ear plate is arranged outside the sleeve, and the ear plate is bolted on the base.
Furthermore, a boss is arranged at the bottom of the water tank, and the test mold is arranged on the boss; the test device is characterized in that a plurality of scale marks for determining the position of the test die are arranged on the boss, and the scale marks are distributed on the surface of the boss in a concentric circle shape.
Specifically, the bearing piece is of a cylindrical structure, at least two second cantilevers are symmetrically arranged on two sides of the cylindrical structure, and the distance measuring device is arranged right above the second cantilevers.
Specifically, the distance measuring device is a laser distance measuring instrument.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a testing arrangement can simulate the road bed and at the bubble water state of operation in-process, has guaranteed that test result and actual value are more close.
(2) The utility model discloses a set up the limiting plate around the loading board for the loading process is stable, has promoted the accuracy of test result.
(3) Average value after testing for a test piece many times, the utility model discloses can once test the resilience modulus of a plurality of test pieces simultaneously, the test result is more objective, and has greatly saved test time.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of a connection structure of the loading device, the water tank and the support frame.
Fig. 3 is a schematic structural diagram of the loading device.
Fig. 4 is a schematic view of the base structure of the support frame.
The reference numerals in the figures denote: 1-testing a mold, 2-loading device, 3-ranging device, 4-water tank, 5-bearing piece, 6-water tank, 7-limiting plate, 8-supporting frame and 9-control box;
21-jack, 22-first cantilever, 23-briquetting;
41-water inlet, 42-water outlet, 43-water inlet pipe, 44-water outlet pipe, 45-water pump, 46-valve, 47-ear plate, 48-boss, 49-scale mark;
51-a second cantilever;
61-heating device, 62-temperature sensor, 63-control panel;
81-base, 82-top plate, 83-support.
The following detailed description of the present invention is provided in connection with the accompanying drawings and the detailed description of the invention.
Detailed Description
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means that the terms are defined with reference to the drawing plane of the corresponding drawing, and "inner" and "outer" mean that the terms are inner and outer relative to the outline of the corresponding part.
As shown in fig. 1, an embodiment of the utility model discloses a roadbed soil resistance to compression resilience modulus testing arrangement, including the examination mould 1 that is used for bearing the sample, be used for exerting the loading device 2 of force for the sample, test sample resilience displacement's range unit 3, simulation sample soaks the basin 4 of environment and be used for bearing the carrier 5 that bears the force that loading device 2 exerted. The water tank 4 is provided with a water inlet 41 and a water outlet 42, and the test mold 1 is arranged in the water tank 4, wherein the water in the water tank 4 can be ensured to submerge the test mold 1 or ensure that a sample in the test mold 1 can be fully immersed.
The carrier 5 is arranged above the test die 1 and below the loading device 2, and the force applied by the loading device 2 is transmitted to the sample through the carrier 5.
Specifically, as shown in fig. 1, the carrier 5 is a cylindrical structure, at least two second cantilevers 51 are symmetrically disposed on two sides of the cylindrical structure, and the distance measuring device 3 is disposed right above the second cantilevers 51. The accuracy of the ranging result is increased by providing a plurality of second cantilevers 51.
Wherein, the gap between the test mould 1 and other components ensures that the water in the water tank can be immersed into the sample in the test mould.
As shown in fig. 2, in the present embodiment, a plurality of test molds 1 are provided. The loading device 2 comprises a jack 21 for applying force, a plurality of first cantilevers 22 and a plurality of press blocks 23, the plurality of first cantilevers 22 are arranged around the jack 21, one press block 23 is connected to the tail end of each first cantilever 22, and the number of the press blocks 23 is matched with that of the test molds 1. Wherein, the jack 21 is a numerical control jack, and the pressing block 23 is positioned above the bearing piece 5. Wherein the diameter of the pressing piece 23 is close to the diameter of the cylindrical body of the bearing member 5.
The distance measuring device 3 is preferably a laser distance measuring instrument and can be cleared at any time. The problems that a dial indicator needs to be continuously corrected in a traditional measuring test, the reading is unstable and the speed is low are solved, and the testing efficiency and the result accuracy are improved.
Specifically, as shown in fig. 1, the water inlet 41 of the water tank is communicated with the water tank 6 through a water inlet pipe 43, the water outlet 42 is communicated with the water tank 6 through a water outlet pipe 44, the water inlet pipe 43 is provided with a water pump 45, and the water outlet pipe 44 is provided with a valve 46.
Wherein, a heating device 61 and a temperature sensor 62 are arranged in the water tank 6. A control panel 63 is arranged in the water tank 6, the control panel 63 is connected with the temperature sensor 62 and the heating device 61, and the heating device 61 is controlled to heat according to the data of the temperature sensor 62, so that the temperature of the water is adjusted.
Specifically, as shown in fig. 2, the water tank 4 is of a sleeve structure, an ear plate 47 is arranged outside the sleeve, and the ear plate 47 is connected to the base 81 through a bolt, so that the water tank is convenient to disassemble and assemble.
Further, in a preferred embodiment of the utility model, as shown in fig. 1, the device still includes limiting plate 7, and limiting plate 7 sets up the upper surface at the sample, is provided with the trompil (not marked in the figure) that supplies to hold the carrier and pass on the limiting plate 7, and the trompil is direct slightly to be greater than the columnar body diameter, and limiting plate 7 is used for restricting to hold carrier 5 and rocks in examination mould 1 to prevent that the loading board from taking place the slope after the atress. Specifically, the limiting plate 7 is a disc with a hole in the center, and the outer diameter of the disc is matched with the inner diameter of the test mold.
Further, in a preferred embodiment of the present invention, as shown in fig. 2, the device further includes a support frame 8, the support frame 8 includes a base 81, a top plate 82 and a pillar 83, the top plate 82 is supported on the base 81 through the pillar 83, and the water tank 4 is disposed on the base 81. The loading device 2 and the distance measuring device 3 are suspended above the test mould 1 through a top plate 82, a control box 9 is arranged on the top plate 82 of the support frame, the loading device is controlled to be started and closed through the control box 9, the loading speed and the loading pressure of the jack 21 are controlled, and the pressure value is read.
Further, in a preferred embodiment of the present invention, as shown in fig. 1 and 4. The bottom of the water tank 4 is provided with a boss 48, and the test mold 1 is arranged on the boss 48. Preferably, a plurality of scale marks 49 for determining the position of the test mold 1 are arranged on the boss 48, and can also be positioned structures such as grooves, and the plurality of scale marks 49 are distributed on the surface of the boss 48 in a concentric circle shape, so that the test mold can be conveniently and accurately installed in the center of the boss 48.
The utility model discloses a concrete operation process does:
setting the test water temperature through a control panel 63 in the water tank 6 according to the test requirements; the water tank 4 is mounted on the base 81; the test molds 1 are respectively placed on the bosses 48 in the water tank 4, and the positions of the test molds are accurately positioned through the scale marks 49 on the bosses. A limiting block 7 is placed above the sample in the test mould, and the bearing piece 5 is placed on the sample and aligned with the pressing block 23.
And (3) opening the water pump 45 until the test piece is submerged in water, starting the loading device 2 through the control box 9 after the soaking time is reached, and reading the reading of the laser ranging device 3 into an initial displacement value or resetting the laser ranging device 3 when the pressing block 23 is contacted with the bearing piece 5. The jack 21 is controlled by the control box 1 to carry out gradual loading and unloading on the top surfaces of the multiple test pieces, the loading pressures P borne by the multiple test pieces are the same, the loading pressures P are displayed on the panel of the control box 9, the deformation L of the multiple test pieces after loading and unloading can be respectively measured by the laser ranging device 3, and then a stress-load P-L curve is drawn to calculate and rebound modulus value.
After the loading pressure P and deformation L readings, the valve 46 is opened to drain the water from the tank 4, completing the modulus of resilience test.
The measurement of the resilience modulus value takes the water soaking state of the actual roadbed under operation into consideration, and the test value is closer to the actual value. And the modulus of resilience of a plurality of test pieces is measured simultaneously, so that a large amount of test time is saved.
In the above description, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be understood broadly, and may be, for example, fixedly connected or detachably connected or integrated; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the technical features described in the above embodiments can be combined in any suitable way without departing from the scope of the present invention, and should be considered as the present invention.
Claims (10)
1. A roadbed soil compression resistance and rebound modulus testing device comprises a test mold (1) for bearing a sample, a loading device (2) for applying force to the sample and a distance measuring device (3) for testing the rebound displacement of the sample,
the device also comprises a water tank (4) for simulating the sample immersion environment and a bearing member (5) for bearing the force applied by the loading device (2); the water tank (4) is provided with a water inlet (41) and a water outlet (42), and the test mold (1) is arranged in the water tank (4);
the bearing piece (5) is arranged above the test die (1) and below the loading device (2), and force applied by the loading device (2) is transmitted to the sample through the bearing piece (5).
2. The roadbed soil compression resistance and rebound modulus testing device as claimed in claim 1, wherein a plurality of test molds (1) are arranged; the loading device (2) comprises a jack (21) for applying force, a plurality of first cantilevers (22) and a plurality of pressing blocks (23), the plurality of first cantilevers (22) are arranged around the jack (21), the tail end of each first cantilever (22) is connected with one pressing block (23), and the number of the pressing blocks (23) is matched with that of the test molds (1); the pressing block (23) is positioned above the bearing piece (5).
3. The roadbed soil compression resistance and rebound modulus testing device as claimed in claim 1, wherein the water inlet (41) of the water tank is communicated with the water tank (6) through a water inlet pipe (43), the water outlet (42) is communicated with the water tank (6) through a water outlet pipe (44), the water inlet pipe (43) is provided with a water pump (45), and the water outlet pipe (44) is provided with a valve (46).
4. The roadbed soil compression resilience modulus testing device as claimed in claim 3, wherein the water tank (6) is provided with a heating device (61) and a temperature sensor (62).
5. The roadbed soil compression resistance and resilience modulus testing device according to claim 1, wherein the device further comprises a limiting plate (7), the limiting plate (7) is arranged on the upper surface of the test sample, an opening for the bearing piece to pass through is formed in the limiting plate (7), and the limiting plate (7) is used for limiting the bearing piece (5) to shake in the test mold (1).
6. The device for testing the compression-resistant modulus of resilience of subgrade soil according to claim 1, further comprising a support frame (8), wherein the support frame (8) comprises a base (81), a top plate (82) and a pillar (83), the top plate (82) is supported on the base (81) through the pillar (83), the water tank (4) is arranged on the base (81), and the loading device (2) and the distance measuring device (3) are suspended above the test mold (1) through the top plate (82).
7. The roadbed soil compression resilience modulus testing device as claimed in claim 6, wherein the water tank (4) is of a sleeve structure, an ear plate (47) is arranged outside the sleeve, and the ear plate (47) is connected to the base (81) through a bolt.
8. The roadbed soil compression resistance and rebound modulus testing device as claimed in claim 1, wherein a boss (48) is arranged at the bottom of the water tank (4), and the test mold (1) is arranged on the boss (48); the test mould is characterized in that a plurality of scale marks (49) used for determining the position of the test mould (1) are arranged on the boss (48), and the scale marks (49) are distributed on the surface of the boss (48) in a concentric circle shape.
9. The roadbed soil compression resilience modulus testing device as claimed in claim 1, wherein the bearing member (5) is a cylindrical body structure, at least two second cantilevers (51) are symmetrically arranged on two sides of the cylindrical body, and the distance measuring device (3) is arranged right above the second cantilevers (51).
10. The roadbed soil compression resilience modulus testing device according to claim 1, wherein the distance measuring device (3) is a laser distance meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920386821.1U CN210154925U (en) | 2019-03-25 | 2019-03-25 | Roadbed soil compression resistance modulus of resilience testing arrangement |
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| CN201920386821.1U CN210154925U (en) | 2019-03-25 | 2019-03-25 | Roadbed soil compression resistance modulus of resilience testing arrangement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111890134A (en) * | 2020-06-28 | 2020-11-06 | 吉林大学 | Reliability test device for ultrasonic machining vibration system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111890134A (en) * | 2020-06-28 | 2020-11-06 | 吉林大学 | Reliability test device for ultrasonic machining vibration system |
| CN111890134B (en) * | 2020-06-28 | 2022-03-29 | 吉林大学 | Reliability test device for ultrasonic machining vibration system |
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