CN212008150U - Crack opening angle-changing strengthening test experimental device - Google Patents
Crack opening angle-changing strengthening test experimental device Download PDFInfo
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- CN212008150U CN212008150U CN202020615789.2U CN202020615789U CN212008150U CN 212008150 U CN212008150 U CN 212008150U CN 202020615789 U CN202020615789 U CN 202020615789U CN 212008150 U CN212008150 U CN 212008150U
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Abstract
The utility model discloses a crack opening angle-changing strengthening test experimental device, including sample mould, similar material and gasbag, the sample mould is the hollow square box of upper end open-ended, the gasbag is placed in the sample mould, similar material is pour and is fixed the gasbag in the sample mould, the gasbag is oblate ball form, the upper end of gasbag is provided with the pressure-bearing hose that is used for inflating for the gasbag gassing, still be provided with four bearing holes on the outer wall of gasbag, four bearing holes are two liang corresponding, and lie in four sides of gasbag centroid, all be fixed with the fine rule on each bearing hole, be provided with four about holes on the sample mould, wherein two about holes are located the bottom of sample mould, remaining two about holes are located the outer wall of sample mould respectively, the fine rule runs through about hole and is used for controlling the gasbag; the utility model discloses simple structure, testing arrangement repeatability is strong, consume time weak point, economic cost low, environmental protection can be good.
Description
Technical Field
The utility model relates to an inside crack of engineering rock mass opens technical field, especially a crack opens aperture and becomes angle and strengthen test experiment device.
Background
Natural cracks and regenerative cracks exist in engineering rock masses, the mechanical behavior of the cracks is mastered, the obvious leading effect is achieved on guiding engineering application, the stability of surrounding rocks such as side slope engineering, mining engineering, tunnel engineering, underground space and the like in geological engineering is not only influenced by the properties of surrounding rock materials, but also influenced by cracks in the rock masses, the generation and the expansion of the cracks need to be reduced, and the stability of the engineering rock masses is improved; in other geological engineering, including geothermal energy exploitation, shale gas exploitation, coal bed gas exploitation, oil exploitation and the like, a large amount of cracks are communicated with fluid, and new cracks are required to be generated, expanded and communicated; the opening and closing effect of the crack influences the expansion and the penetration of the crack, so that the grasping of the opening and closing behavior of the crack has important engineering significance.
The opening or closing of the crack is influenced by multiple factors, the most direct is the normal stress acting on rock masses on the two sides of the crack, the opening and closing degree of the crack is determined by the positive and negative sum of the normal stress, numerical simulation, a mechanical model and the like exist in the current method for acquiring the opening and closing degree of the crack, clear cognition is performed on the opening and closing behavior of the crack, the law obtained by the simplified mechanical model and the numerical model is difficult to be used for guiding engineering application, large errors often exist, and the opening and closing behavior characteristic of the crack needs to be solved urgently for engineering technicians.
Disclosure of Invention
In order to overcome the defects, the utility model aims to provide a crack opening angle-changing strengthening test experimental device which has the advantages of low economic cost, small labor intensity and simple operation.
In order to achieve the purpose, the utility model is implemented according to the following technical scheme:
a crack opening angle-changing strengthening test experimental device comprises a sample mold, a similar material and an air bag, wherein the similar material is used for simulating the mechanical behavior of a rock mass material and consists of materials such as river sand, calcium carbonate, gypsum, mica powder, cement, water and the like; the air bag is used for simulating the mechanical behavior of the crack, and the sample mold is used for molding the geometric shape of the sample and building the structure of the crack of the sample; the test sample mold is a hollow square box with an opening at the upper end, the air bag is placed in the test sample mold, the similar materials are poured in the test sample mold to fix the air bag, the air bag is in a flat ball shape, a pressure-bearing hose for inflating and deflating the air bag is arranged at the upper end of the air bag, four bearing holes are further formed in the outer wall of the air bag, the four bearing holes correspond to each other in pairs and are located on four side faces of the centroid of the air bag, fine wires are fixed on the bearing holes and used for positioning the inclination angle of the air bag, four constraint holes are formed in the test sample mold, two of the constraint holes are located at the bottom of the test sample mold, the remaining two constraint holes are located on the outer wall of the test sample mold respectively, and the fine wires penetrate; the method comprises the following steps of (1) suspending an air bag filled with air in the center of a sample mold by taking the mold as a support and thin wires as force transmission media, and adjusting the length of each thin wire to enable the air bag to keep a certain included angle with the vertical center of the sample mold; according to a test sample, obtaining a matching scheme of similar materials, pouring the matched similar materials into a sample mold, and compacting by using a compaction tool;
furthermore, the top of the pressure-bearing hose is provided with an inflation and deflation valve which is used for inflating and deflating the air bag, can be connected with a pressure gauge, reads real-time pressure change and reflects the opening and closing effect of the crack;
furthermore, one end of the pressure-bearing hose is communicated with the air bag, and the other end of the pressure-bearing hose extends out of the sample mold;
further, the distance between the front wall and the rear wall of the inflated air bag is 2mm, and the geometric dimension of the air bag is ϕ 100 multiplied by 2 mm;
further, the aperture of the bearing hole is 1 mm;
furthermore, the diameter of the thin wire is smaller than 0.1mm, the influence of the thin wire on the mechanical property of the sample is reduced, the thin wire has enough strength to support the suspended air bag, and after the similar materials are solidified, the thin wire and the sample mold are integrated.
Compared with the prior art, the utility model discloses a crack opening becomes angle and strengthens test experiment device possesses following beneficial effect:
(1) the utility model discloses a test device repeatability is strong, consume time weak point, economic cost low, environmental protection performance good, easy operation.
(2) The utility model discloses simple structure, required equipment cost, the labour cost of reducible normal position test shorten the cycle of opening and closing the action in confirming the engineering rock mass.
(3) The utility model discloses can confirm that different cracks under the specific condition produce the form, the difference adds cracked action characteristic of opening and closing under the uninstallation condition, have extensive application prospect in this technical field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic view of the airbag structure of the present invention;
fig. 2 is a schematic view of a top view structure of the similar material of the present invention after pouring;
fig. 3 is a schematic view of the structure of the similar material poured from the bottom of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, illustrative embodiments and description of which are provided herein to explain the invention, but not as a limitation thereof.
As shown in fig. 1 and 2, the experimental device for the crack opening angle change strengthening test comprises a sample mold 1, a similar material 2 and an air bag 3, wherein the similar material is used for simulating the mechanical behavior of a rock mass material, and the similar material 2 is composed of river sand, calcium carbonate, gypsum, mica powder, cement, water and other materials; the air bag 3 is used for simulating the mechanical behavior of a crack, and the sample mold 1 is used for molding the geometric shape of a sample and building the structure of the crack of the sample; the test sample mold 1 is a hollow square box with an opening at the upper end, the air bag 3 is placed in the test sample mold 1, the similar material 2 is poured in the test sample mold 1 to fix the air bag 3, the air bag 3 is in a flat spherical shape, a pressure-bearing hose 4 for inflating and deflating the air bag is arranged at the upper end of the air bag 3, four bearing holes 5 are further arranged on the outer wall of the air bag 3, every two of the four bearing holes 5 correspond to each other and are located on four side faces of the centroid of the air bag 3, a fine wire 6 is fixed on each bearing hole 5 and used for positioning the inclination angle of the air bag 3, four constraint holes 7 are arranged on the test sample mold 1 as shown in fig. 3, two constraint holes 7 are located at the bottom of the test sample mold 1, the remaining two constraint holes 7 are respectively located on the outer wall of the test sample mold 1, and the fine wire 6 penetrates through the constraint; taking the sample mold 1 as a support and the thin lines 6 as force transmission media, suspending the air bags 3 filled with air in the center of the sample mold 1, and adjusting the length of each thin line 6 to ensure that the air bags 3 keep a certain included angle with the vertical center of the sample mold 1; according to a test sample, obtaining a proportioning scheme of the similar material 2, pouring the proportioned similar material 2 into a sample mold 1, and compacting by using a compacting tool.
As shown in fig. 1, the top of the pressure-bearing hose 4 is provided with an inflation/deflation valve 8 for inflating and deflating the air bag 3, and the inflation/deflation valve can be connected with a pressure gauge to read real-time pressure changes and reflect the opening/closing effect of cracks; one end of the pressure-bearing hose 4 is communicated with the air bag 3, and the other end of the pressure-bearing hose extends out of the sample mold 1.
As shown in fig. 1, the distance between the front wall and the rear wall of the inflated air bag 3 is 2mm, and the geometric dimension of the air bag 3 is ϕ 100 multiplied by 2 mm; the aperture of the bearing hole 5 is 1 mm; the diameter of the thin wire 6 is smaller than 0.1mm, the influence of the thin wire on the mechanical property of the sample is reduced, the thin wire should have enough strength to support the suspended air bag 3, and after the similar material 2 is solidified, the thin wire 6 and the sample mold are integrated into a whole.
The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.
Claims (6)
1. The utility model provides a crack opening becomes angle and reinforces test experimental apparatus, its characterized in that, includes sample mould, similar material and gasbag, the sample mould is upper end open-ended hollow square box, the gasbag is placed in the sample mould, similar material is pour and is fixed the gasbag in the sample mould, the gasbag is oblate ball form, the upper end of gasbag is provided with the pressure-bearing hose that is used for aerifing the gassing for the gasbag, still be provided with four bearing holes on the outer wall of gasbag, four bearing holes two liang of corresponding, and be located four sides of gasbag centroid, all be fixed with the fine rule on every bearing hole, be provided with four about holes on the sample mould, wherein two about holes are located the bottom of sample mould, and two remaining about holes are located the outer wall of sample mould respectively, the fine rule runs through about hole and is used for controlling the gasbag.
2. The experimental device for the crack opening and angle change strengthening test according to claim 1, wherein an air charging and discharging valve is arranged at the top of the pressure-bearing hose.
3. The experimental device for the crack opening degree and angle change strengthening test according to claim 2, wherein one end of the pressure-bearing hose is communicated with the air bag, and the other end of the pressure-bearing hose extends out of the sample mold.
4. The experimental device for testing the crack opening degree and the angle change and strengthening of the steel plate as claimed in claim 1, wherein the distance between the front wall and the rear wall of the inflated air bag is 2mm, and the geometric dimension of the air bag is ϕ 100 x 2 mm.
5. The experimental device for the crack opening and angle change strengthening test of claim 4, wherein the diameter of the bearing hole is 1 mm.
6. The crack opening and angle change strengthening test experimental device as claimed in claim 4, wherein the diameter of the thin wire is less than 0.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020615789.2U CN212008150U (en) | 2020-04-22 | 2020-04-22 | Crack opening angle-changing strengthening test experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020615789.2U CN212008150U (en) | 2020-04-22 | 2020-04-22 | Crack opening angle-changing strengthening test experimental device |
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| Publication Number | Publication Date |
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| CN212008150U true CN212008150U (en) | 2020-11-24 |
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| CN202020615789.2U Active CN212008150U (en) | 2020-04-22 | 2020-04-22 | Crack opening angle-changing strengthening test experimental device |
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| CN (1) | CN212008150U (en) |
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- 2020-04-22 CN CN202020615789.2U patent/CN212008150U/en active Active
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