CN209784351U - Expansive rock hydration expansive force testing arrangement - Google Patents
Expansive rock hydration expansive force testing arrangement Download PDFInfo
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- CN209784351U CN209784351U CN201920660542.XU CN201920660542U CN209784351U CN 209784351 U CN209784351 U CN 209784351U CN 201920660542 U CN201920660542 U CN 201920660542U CN 209784351 U CN209784351 U CN 209784351U
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- expansive
- pressure head
- permeable stone
- ring shape
- cushion
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Abstract
The utility model discloses a testing device for hydration expansive force of expansive rock, which comprises a base and a cross beam, wherein two sides of the upper end of the base are respectively fixed with a stand column, and two ends of the cross beam are respectively fixed on two stand columns; the middle part of a cross beam of the reaction frame is in threaded connection with a threaded rod, the upper end of the threaded rod is fixedly connected with a handle, the lower end of the threaded rod is fixedly connected with a pressure transmission rod, the lower end of the pressure transmission rod is rotatably connected with an installation frame, two ends of the installation frame are respectively sleeved on two vertical stand columns, and a pressure sensor is installed below the installation frame; the base top is provided with the basin, is provided with ring shape mount pad in the basin, and ring shape mount pad top is provided with pressure head under the ring shape, and ring shape is provided with the steel cylinder down on the pressure head, and from the top down places permeable stone, sample and permeable stone down in proper order in the steel cylinder, goes up the permeable stone top and places the pressure head, goes up the pressure head top and places the cushion, and the gasket has been placed to the cushion top, and the amesdial is installed on the cushion. The utility model has the advantages of being simple in structure and convenient in operation, the accuracy is high, the cost is lower.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering, concretely relates to swelling rock hydration expansive force testing arrangement.
Background
Swelling rock refers to a class of rock that reacts biochemically with water, resulting in an increase in the water content and volume of the rock over time. In recent years, in the development of resource and energy and in traffic, water conservancy, electric power and town construction projects, engineering problems caused by expansive rocks are encountered, such as the phenomena of bottom plate uplift, side wall extrusion and concrete lining damage in railway tunnels and cavern projects, and the phenomena bring serious loss to the engineering construction. Therefore, it is an urgent problem to study the expansive force of the expansive rock and further to deal with many hazards caused by the expansive rock.
SUMMERY OF THE UTILITY MODEL
In order to measure the expansive force of the expansive rock better, the utility model provides a simple structure, convenient operation, the lower expansive rock hydration expansive force testing arrangement of accuracy height, cost.
In order to achieve the purpose, the technical scheme adopted by the utility model is that the device for testing the hydration expansive force of the expansive rock comprises a reaction frame, wherein the reaction frame comprises a base and a cross beam, two vertical upright columns are respectively fixed on two sides of the upper end of the base, and two ends of the cross beam are respectively fixed on the upper ends of the two vertical upright columns; the middle part of a cross beam of the reaction frame is provided with a threaded through hole, a threaded rod is connected with the threaded through hole in a threaded manner, the upper end of the threaded rod is fixedly connected with a handle, the lower end of the threaded rod is fixedly connected with a pressure transmission rod, the lower end of the pressure transmission rod is rotatably connected with an installation frame, two ends of the installation frame are respectively sleeved on two vertical stand columns, and a pressure sensor is installed below the installation frame; the base top is provided with the basin, is provided with ring shape mount pad in the basin, and ring shape mount pad top is provided with pressure head under the ring shape, and ring shape is provided with side limit steel cylinder down on the pressure head, and from the top down places permeable stone, sample and lower permeable stone in the side limit steel cylinder in proper order, goes up the permeable stone top and places the pressure head, goes up the pressure head top and places the cushion, and the gasket has been placed to the cushion top, and the amesdial is installed on the cushion.
Preferably, the side wall of the circular ring-shaped mounting seat is provided with a water permeable hole.
Preferably, the pressure sensor is electrically connected with the display screen.
Preferably, the diameters of the sample, the upper permeable stone and the lower permeable stone are the same as the inner diameter of the side limiting steel cylinder.
Preferably, the diameter of the lower permeable stone is larger than the inner diameter of the annular lower pressure head.
Adopt the utility model discloses carry out the step as follows of expansibility test to the expansion rock: after the expanded rock is heated and dehydrated, processing the expanded rock into a cylindrical expanded rock sample by using a clamp, placing an annular mounting seat in a water tank, placing an annular lower pressure head on the annular mounting seat, placing a side limiting steel cylinder on the annular lower pressure head, sequentially placing lower permeable stone, the expanded rock sample and upper permeable stone into the side limiting steel cylinder, placing an upper pressure head above the upper permeable stone, placing a cushion block on the upper pressure head, placing a gasket on the cushion block, and mounting a dial indicator on the gasket; rotating the handle to enable the pressure transmission rod to drive the mounting frame and the pressure sensor to move downwards, and recording the readings of the pressure sensor and the dial indicator when the pressure sensor contacts the gasket; the method comprises the steps of injecting distilled water into a water tank, expanding after water absorption of expansive rock, limiting due to side limitation, extruding a gasket by an expansive rock sample, enabling the number of readings of a dial indicator to change, rotating a handle when the reading change of the dial indicator exceeds a set threshold value, enabling a pressure transmission rod to drive an installation frame and a pressure sensor to move downwards, enabling the reading of the dial indicator to be recovered to an initial position (the reading before the distilled water is added into the water tank), recording the reading and the experiment time of the pressure sensor at the moment, and circulating the steps to obtain the expansion force value of the expansive rock water absorption changing along with time.
The utility model discloses the beneficial effect who produces is: the utility model has the advantages of being simple in structure and convenient in operation, can be very convenient test expansion rock hydration expansive force to the accuracy is high, the cost is lower, and to the expansive force of studying expansion rock, the engineering problem that the solution expansion rock arouses has important meaning.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a side limiting steel cylinder installation part;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
FIG. 4 is a graph showing the relationship between the lateral expansion force F and the soaking time t of a gypsum rock sample.
Reference numbers in the figures: 1 handle, 2 stands, 3 pressure transmission pole, 4 pressure sensor, 5 amesdial, 6 gaskets, 7 go up the pressure head, 8 basins, 9 samples, 10 water, 11 bases, 12 steel cylinder, 13 down permeable stone, 14 pressure heads under the ring shape, 15 go up permeable stone, 16 cushions, 17 ring shape mount pads, 18 mounting brackets, 19 crossbeams, 20 threaded rods, 21 permeable holes.
Detailed Description
Example 1
as shown in fig. 1-3, a device for testing the hydration expansive force of expansive rocks comprises a reaction frame, wherein the reaction frame comprises a base 11 and a cross beam 19, two vertical upright columns 2 are respectively fixed on two sides of the upper end of the base 11, and two ends of the cross beam 19 are respectively fixed on the upper ends of the two vertical upright columns 2; a threaded through hole is formed in the middle of a cross beam 19 of the reaction frame, a threaded rod 20 is connected to the threaded through hole in a threaded manner, a handle 1 is fixedly connected to the upper end of the threaded rod 20, a pressure transmission rod 3 is fixedly connected to the lower end of the threaded rod 20, the lower end of the pressure transmission rod 3 is rotatably connected with an installation frame 18, two ends of the installation frame 18 are respectively sleeved on two vertical stand columns 2, and a pressure sensor 4 is installed below the installation frame 18; base 11 top is provided with basin 8, be provided with ring shape mount pad 17 in the basin 8, ring shape mount pad 17 top is provided with pressure head 14 under the ring shape, pressure head 14 top is provided with side limit steel cylinder 12 under the ring shape, from the top down places permeable stone 15 in proper order in the side limit steel cylinder 12, gypsum rock sample 9 and lower permeable stone 13, go up permeable stone 13 top and place pressure head 7, go up pressure head 7 top and place cushion 16, gasket 6 has been placed to cushion 16 top, amesdial 5 installs on gasket 6.
And the side wall of the circular ring-shaped mounting seat 17 is uniformly provided with water permeable holes 21. The pressure sensor 4 is electrically connected with the display screen.
The diameters of the gypsum rock sample 9, the upper permeable stone 15 and the lower permeable stone 13 are the same as the inner diameter of the side limiting steel cylinder 12. The diameter of the lower permeable stone 13 is larger than the inner diameter of the annular lower pressure head 14 and smaller than the outer diameter of the annular lower pressure head 14.
The steps of adopting the expansive rock hydration expansive force testing device of the embodiment to test the expansive force of the expansive rock are as follows:
heating and dehydrating a standard gypsum rock sample with the diameter of 50mm in a constant temperature box, processing gypsum into a gypsum rock sample with the diameter of 48.85mmH35mm on a machine tool by using a clamp, placing a circular mounting seat 17 in a water tank 8, placing a circular lower pressure head 14 on the circular mounting seat 17, placing a side limiting steel cylinder 12 on the circular lower pressure head 14, sequentially placing a lower permeable stone 13, a gypsum rock sample 9 and an upper permeable stone 15 into the side limiting steel cylinder 12, placing an upper pressure head 7 above the upper permeable stone 15, placing a cushion block 1 on the upper pressure head 7, placing a gasket 6 on a cushion block 16, and installing a dial indicator 5 on the gasket 6; rotating the handle 1, driving the threaded rod 20 to move downwards by the handle 1, driving the mounting frame 18 and the pressure sensor 4 to move downwards by the pressure transmission rod 3, and recording the readings of the pressure sensor 4 and the dial indicator 5 when the pressure sensor 4 contacts the gasket 6; distilled water is injected into the water tank 8, the gypsum rock sample 9 expands after absorbing water, and the gypsum rock sample 9 upwards presses the gasket 6 due to the limitation of lateral limit, so that the reading of the dial indicator 5 changes, and when the reading change of the dial indicator 5 exceeds the set threshold value (the setting of the embodiment is 10 multiplied by 10)-3mm), the handle 1 is rotated to drive the pressure transmission rod 3 to drive the mounting frame 18 and the pressure sensor 4 to move downwards, the dial indicator 5 is enabled to read and restore to the initial position (the reading before distilled water is added to the water tank), the reading and the experiment time of the pressure sensor 4 are recorded at the moment, the steps are circulated, the relational data of the side limit expansion force and the soaking time of the gypsum rock sample can be obtained, and the data are subjected to data processingFitting can be carried out to obtain a relation curve graph (shown in figure 4) of the side limit expansion force F and the water immersion time t, and the expansion force generated when the gypsum tunnel surrounding rock meets water can be estimated according to the curve graph.
Claims (5)
1. The utility model provides an expansion rock hydration expansive force testing arrangement which characterized in that: the device comprises a reaction frame, wherein the reaction frame comprises a base and a cross beam, two vertical stand columns are respectively fixed on two sides of the upper end of the base, and two ends of the cross beam are respectively fixed on the upper ends of the two vertical stand columns; the middle part of a cross beam of the reaction frame is provided with a threaded through hole, a threaded rod is connected with the threaded through hole in a threaded manner, the upper end of the threaded rod is fixedly connected with a handle, the lower end of the threaded rod is fixedly connected with a pressure transmission rod, the lower end of the pressure transmission rod is rotatably connected with an installation frame, two ends of the installation frame are respectively sleeved on two vertical stand columns, and a pressure sensor is installed below the installation frame; the base top is provided with the basin, is provided with ring shape mount pad in the basin, and ring shape mount pad top is provided with pressure head under the ring shape, and ring shape is provided with side limit steel cylinder down on the pressure head, and from the top down places permeable stone, sample and lower permeable stone in the side limit steel cylinder in proper order, goes up the permeable stone top and places the pressure head, goes up the pressure head top and places the cushion, and the gasket has been placed to the cushion top, and the amesdial is installed on the cushion.
2. The expansive rock hydration expansive force testing device of claim 1, wherein: and the side wall of the circular mounting seat is provided with a water permeable hole.
3. The expansive rock hydration expansive force testing device of claim 1, wherein: the pressure sensor is electrically connected with the display screen.
4. The expansive rock hydration expansive force testing device of claim 1, wherein: the diameters of the sample, the upper permeable stone and the lower permeable stone are the same as the inner diameter of the side limiting steel cylinder.
5. The expansive rock hydration expansive force testing device of claim 1, wherein: the diameter of the lower permeable stone is larger than the inner diameter of the annular lower pressure head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920660542.XU CN209784351U (en) | 2019-05-09 | 2019-05-09 | Expansive rock hydration expansive force testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920660542.XU CN209784351U (en) | 2019-05-09 | 2019-05-09 | Expansive rock hydration expansive force testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209784351U true CN209784351U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920660542.XU Expired - Fee Related CN209784351U (en) | 2019-05-09 | 2019-05-09 | Expansive rock hydration expansive force testing arrangement |
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| CN (1) | CN209784351U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991394A (en) * | 2019-05-09 | 2019-07-09 | 河南理工大学 | A kind of expansive rock hydration swelling force test device and test method |
-
2019
- 2019-05-09 CN CN201920660542.XU patent/CN209784351U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991394A (en) * | 2019-05-09 | 2019-07-09 | 河南理工大学 | A kind of expansive rock hydration swelling force test device and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 |