CN209215040U - A kind of CBR test static pressure sample preparation device suitable for fine grained soil - Google Patents

A kind of CBR test static pressure sample preparation device suitable for fine grained soil Download PDF

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CN209215040U
CN209215040U CN201821892879.5U CN201821892879U CN209215040U CN 209215040 U CN209215040 U CN 209215040U CN 201821892879 U CN201821892879 U CN 201821892879U CN 209215040 U CN209215040 U CN 209215040U
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sample preparation
static pressure
cbr
preparation device
fine grained
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卢阳
谢德琦
王东权
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Heilongjiang University
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Heilongjiang University
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Abstract

A kind of CBR test static pressure sample preparation device suitable for fine grained soil, it is related to a kind of static pressure sample preparation device, the utility model uses compacting process to solve existing sample debulking methods, lead to the not only lengthy and tedious complexity of sample making course, it is time-consuming and laborious, it is more difficult to guarantee the compaction of entire sample, causes test discreteness big, the low problem of precision.The utility model includes pedestal, examination cylinder, lantern ring and pressure head, the pressure head, lantern ring, examination cylinder and pedestal are from top to bottom set gradually, the lower surface of pressure head and the upper end of ring set are detachably connected, the lower end of ring set and the upper end of examination cylinder are detachably connected, and the upper surface of the lower end and pedestal of trying cylinder is detachably connected.The CBR that the utility model is applied to fine grained soil tests static pressure sample preparation.

Description

A kind of CBR test static pressure sample preparation device suitable for fine grained soil
Technical field
The utility model relates to a kind of sample preparation devices, and in particular to a kind of CBR test static pressure sample preparation suitable for fine grained soil Device.
Background technique
The mechanical performance index of road engineering material has direct influence to the stabilization of road and safety, especially high Grade road, the requirement to material performance index is more harsh, and CBR California Bearing Ratio test is road For evaluating soil matrix and a kind of test method of other ground surface material bearing capacities in engineering, earliest by California, USA public affairs Road bureau proposes, and is widely used by the test of China's road engineering material.
When CBR test principle is test, the maximum dry density and optimum moisture content determined by standard compaction test prepares institute The test specimen needed, for the least favorable state of simulation material in use, soaked four round the clock before load, tests soaked expansion Amount is then further applied load additional stress of the plate with simulated roadway structure to soil matrix in test specimen top surface, carries out penetration test, injection examination The bearing capacity for testing middle material is higher, bigger to the load of application needed for the certain depth of penetration of its pressure.This test principle makes The compactness that test specimen must be tested becomes one of the important factor in order for influencing CBR test result, and " highway engineering geotechnique tries in China Test regulation " in the sample debulking methods that use is compacting process when making to CBR test sample, the not only lengthy and tedious complexity of sample making course, It is time-consuming and laborious, it is more difficult to which that the compaction for guaranteeing entire sample causes test discreteness big, and precision is low.
Utility model content
The purpose of this utility model leads to not only sample making course to solve existing sample debulking methods using compacting process Lengthy and tedious complexity, it is time-consuming and laborious, it is more difficult to which that the compaction for guaranteeing entire sample causes test discreteness big, the low problem of precision.For It solves the problems, such as above-mentioned sample making course, and then a kind of CBR suitable for fine grained soil is provided and tests static pressure sample preparation device.
The technical solution of the utility model is:
A kind of CBR test static pressure sample preparation device suitable for fine grained soil includes pedestal, examination cylinder, lantern ring and pressure head, institute It states pressure head, lantern ring, examination cylinder and pedestal from top to bottom to set gradually, the lower surface of pressure head and the upper end of lantern ring are detachably connected, set The lower end of ring and the upper end of examination cylinder are detachably connected, and the upper surface of the lower end and pedestal of trying cylinder is detachably connected.
Further, the pedestal is made of disc and two handles, and the upper surface of disc is equipped with circular groove, circle Two sides of disk body are opposite to be respectively provided with a handle.
Further, the diameter of the disc is 212mm, and with a thickness of 20mm, the diameter of circular groove is 172mm, slot Depth is 5mm.
Further, the examination cylinder is the circular cylinder body of upper opening, and the inner ring for trying cylinder is equipped with upward protrusion.
Further, the internal diameter of the examination cylinder is 152mm, outer diameter 172mm, is highly 170mm, wall thickness 10mm.
Further, it is 10mm, outer diameter 172mm, internal diameter 152mm that the lantern ring, which is wall thickness, is highly the circle of 50mm Shape ring body.
Further, the lower end of the lantern ring is equipped with groove matched with the bulge.
Further, the pressure head is made of round nut cap and round solid column, and the nut cap and round solid column are by upper To lower integrated molding.
Further, the diameter of the nut cap is 212mm, with a thickness of 10mm.
Further, the diameter of the round solid column is 151mm, is highly 50mm.
The utility model has the effect that compared with prior art
For drawback present in traditional CBR test sample making course, static pressure sample preparation device is designed, press machine is borrowed and is trying The sample that design compactness is suppressed in cylinder, reduces the discreteness of sample, and compaction rate is relatively uniform, it is ensured that without intermediate hierarchical Interface exists, and sample molding effect is guaranteed, operation is simple, improves sample preparation efficiency.
Detailed description of the invention
Fig. 1 is the main view of the utility model；Fig. 2 is the left view of Fig. 1；Fig. 3 is the top view of Fig. 1；
Fig. 4 is the overall structure diagram of the utility model；
Fig. 5 is the main view of pedestal；Fig. 6 is the left view of Fig. 5；Fig. 7 is the top view of Fig. 5；
Fig. 8 is the stereoscopic schematic diagram of Fig. 5；
Fig. 9 is the main view for trying cylinder；Figure 10 is the left view of Fig. 9；Figure 11 is the top view of Fig. 9；
Figure 12 is the stereoscopic schematic diagram of Fig. 9；
Figure 13 is the main view of lantern ring；Figure 14 is the left view of Figure 13；Figure 15 is the top view of Figure 13；
Figure 16 is the stereoscopic schematic diagram of Figure 13；
Figure 17 is the main view of pressure head；Figure 18 is the left view of Figure 17；Figure 19 is the bottom view of Figure 17；
Figure 20 is the schematic perspective view of Figure 17.
Specific embodiment
Specific embodiment 1: illustrating that present embodiment, one kind of present embodiment are suitable for particulate in conjunction with Fig. 1 to Figure 20 The CBR test static pressure sample preparation device of soil includes pedestal 1, examination cylinder 2, lantern ring 3 and pressure head 4, the pressure head 4, lantern ring 3, examination cylinder 2 and bottom Seat 1 is from top to bottom set gradually, and the lower surface of pressure head 4 and the upper end of lantern ring 3 are detachably connected, the lower end of lantern ring 3 and examination cylinder 2 Upper end be detachably connected, the lower end and the upper surface of pedestal 1 for trying cylinder 2 are detachably connected.So set, be easily installed, dismantle, The pedestal 1, examination cylinder 2, lantern ring 3 and pressure head 4 are cast by cast iron or stainless steel, and durable, sample preparation is efficiently easy and closely knit It spends relatively uniform.
Specific embodiment 2: illustrating present embodiment in conjunction with Fig. 5 to Fig. 8, the pedestal 1 of present embodiment is by disk Body 1-1 and two handle 1-2 compositions, the upper surface of disc 1-1 are equipped with circular groove 1-1-1, two sides of disc 1-1 It is opposite to be respectively provided with a handle 1-2.The setting of handle 1-2, for the ease of carrying.Other compositions and connection relationship and specific implementation Mode one is identical.
Specific embodiment 3: illustrating present embodiment, the disc 1-1 of present embodiment in conjunction with Fig. 5 to Fig. 8 Diameter be 212mm, with a thickness of 20mm, the diameter of circular groove 1-1-1 is 172mm, groove depth 5mm.Circular groove 1-1-1 Cylinder 2 is tried for placing, diameter dimension is consistent with the examination outer diameter of cylinder 2.Other compositions and connection relationship and specific implementation Mode two is identical.
Specific embodiment 4: illustrating present embodiment in conjunction with Fig. 9 to Figure 12, the examination cylinder 2 of present embodiment is upper The inner ring of the circular cylinder body of portion's opening, examination cylinder 2 is equipped with collar flange 2-1 upwards.So set, convenient for being connected with upper collar 3 It connects.Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 5: illustrate present embodiment in conjunction with Fig. 9 to Figure 12, the examination cylinder 2 of present embodiment it is interior Diameter is 152mm, outer diameter 172mm, is highly 170mm, wall thickness 10mm.Other compositions and connection relationship and specific embodiment Four is identical.
Specific embodiment 6: illustrating present embodiment in conjunction with Figure 13 to Figure 16, the lantern ring 3 of present embodiment is wall Thickness is 10mm, outer diameter 172mm, internal diameter 152mm, is highly the rounded ring body of 50mm, so set, can increase examination cylinder Highly, increase the amount of being put into of sample.Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 7: illustrating present embodiment in conjunction with Figure 13 to Figure 16, under the lantern ring 3 of present embodiment End is equipped with the groove 3-1 matched with the collar flange 2-1.So set, for the ease of being connected with lower part examination cylinder.It is other Composition and connection relationship are identical as specific embodiment six.
Specific embodiment 8: illustrating present embodiment in conjunction with Figure 17 to Figure 20, the pressure head 4 of present embodiment is by justifying Shape nut cap 4-1 and circle solid column 4-2 is formed, and the nut cap 4-1 and circle solid column 4-2 are from top to bottom integrally formed.It is round Nut cap 4-1 and circle solid column 4-2 is concentric design.Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 9: illustrating present embodiment, the nut cap 4-1 of present embodiment in conjunction with Figure 17 to Figure 20 Diameter be 212mm, with a thickness of 10mm.Other compositions and connection relationship are identical as specific embodiment eight.
Specific embodiment 10: illustrating present embodiment, the round entity of present embodiment in conjunction with Figure 17 to Figure 20 The diameter of column 4-2 is 151mm, is highly 50mm.Round solid column 4-2 and lantern ring 3 are clearance fit.Other compositions and connection Relationship is identical as specific embodiment eight.
Working principle:
When sample preparation, quality of soil sample needed for calculating setting compactness according to maximum dry density and maximum water holding capacity, by pedestal 1, after examination cylinder 2, lantern ring 3 are installed, disposably the soil of predetermined amount is fitted into mold, again by press machine point after preliminary consolidation Compacting obtains predetermined soil sample twice.
Method for making sample step:
1. carrying out standard heavy duty compaction test II -2, the maximum dry density and optimum moisture content of sample are asked.
2. preparing sample, the quality G of sample by optimum moisture content are as follows:
G=2177 ρdmax·K·(1+W0)
G-sample quality, g in formula；
The volume of 2177-samples, cm3；
ρdmaxThe maximum dry density of-sample, g/cm3；
K-sample compactness；
W0The optimum moisture content of-sample, %.
A sample is laid in metal dish, is equably sprayed by the water that this part of sample that calculated in advance obtains should add On sample.Sample is sufficiently mixed into uniform state with scuppit, it is spare to be then charged into infiltration in closed container or plastic pocket. Infiltrating time: rich clay must not be less than for 24 hours, and light clay can shorten to 12h, and sand can shorten to 1h, and natural soft-clay can shorten to 2h or so.
3. soil sample is packed into examination cylinder 2, tries to put on cylinder 2 and continue after lantern ring 3 to fill sample, if be difficult to load can first employment for soil sample Power carries out preliminary consolidation, is then pressurizeed with 151 × h50 of Φ pressure head 4, pressure head 4 is pressed onto bottom, i.e. circle nut cap 4-1 and set Lower collar is unloaded after being in contact at the top of ring 3, is reinstalled pressure head 4, continues to pressurize with press machine, it is when pressure head 4 is pressed onto bottom again, i.e., round Shape nut cap 4-1 and examination cylinder 2 at the top of be in contact after sample complete.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model Limitation be not intended to limit the utility model although the utility model has been disclosed with preferred embodiment as above, it is any ripe Professional and technical personnel is known, is not being departed within the scope of technical solutions of the utility model, when in the technology using the disclosure above Hold the equivalent embodiment for being modified or being modified to equivalent variations, but all without departing from technical solutions of the utility model Hold, according to the technical essence of the utility model, within the spirit and principles of the present invention, to the above embodiments What simple modifications, equivalent substitutions and improvements etc., within the protection scope for still falling within technical solutions of the utility model.

Claims (10)

1. a kind of CBR suitable for fine grained soil tests static pressure sample preparation device, it is characterised in that: described a kind of suitable for fine grained soil CBR test static pressure sample preparation device includes pedestal (1), examination cylinder (2), lantern ring (3) and pressure head (4), the pressure head (4), lantern ring (3), Examination cylinder (2) and pedestal (1) are from top to bottom set gradually, and the lower surface of pressure head (4) and the upper end of lantern ring (3) are detachably connected, set The lower end of ring (3) and the upper end of examination cylinder (2) are detachably connected, and the upper surface of the lower end and pedestal (1) of trying cylinder (2) detachably connects It connects.
2. a kind of CBR suitable for fine grained soil according to claim 1 tests static pressure sample preparation device, it is characterised in that: institute It states pedestal (1) to be made of disc (1-1) and two handles (1-2), the upper surface of disc (1-1) is equipped with circular groove (1- 1-1), two sides of disc (1-1) are opposite is respectively provided with a handle (1-2).
3. a kind of CBR suitable for fine grained soil according to claim 2 tests static pressure sample preparation device, it is characterised in that: institute The diameter for stating disc (1-1) is 212mm, and with a thickness of 20mm, the diameter of circular groove (1-1-1) is 172mm, groove depth 5mm.
4. a kind of CBR suitable for fine grained soil according to claim 1 tests static pressure sample preparation device, it is characterised in that: institute The circular cylinder body that examination cylinder (2) is upper opening is stated, the inner ring of examination cylinder (2) is equipped with upward collar flange (2-1).
5. a kind of CBR suitable for fine grained soil according to claim 4 tests static pressure sample preparation device, it is characterised in that: institute The internal diameter for stating examination cylinder (2) is 152mm, outer diameter 172mm, is highly 170mm, wall thickness 10mm.
6. a kind of CBR suitable for fine grained soil according to claim 1 tests static pressure sample preparation device, it is characterised in that: institute The wall thickness for stating lantern ring (3) is 10mm, outer diameter 172mm, internal diameter 152mm, is highly the rounded ring body of 50mm.
7. a kind of CBR test static pressure sample preparation device suitable for fine grained soil according to claim 4 or 6, it is characterised in that: The lower end of the lantern ring (3) is equipped with the groove (3-1) matched with collar flange (2-1).
8. a kind of CBR suitable for fine grained soil according to claim 1 tests static pressure sample preparation device, it is characterised in that: institute It states pressure head (4) to be made of round nut cap (4-1) and round solid column (4-2), the nut cap (4-1) and round solid column (4-2) From top to bottom it is integrally formed.
9. a kind of CBR suitable for fine grained soil according to claim 8 tests static pressure sample preparation device, it is characterised in that: institute The diameter for stating nut cap (4-1) is 212mm, with a thickness of 10mm.
10. a kind of CBR suitable for fine grained soil according to claim 8 tests static pressure sample preparation device, it is characterised in that: institute The diameter for stating round solid column (4-2) is 151mm, is highly 50mm.
CN201821892879.5U 2018-11-16 2018-11-16 A kind of CBR test static pressure sample preparation device suitable for fine grained soil Active CN209215040U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821892879.5U CN209215040U (en) 2018-11-16 2018-11-16 A kind of CBR test static pressure sample preparation device suitable for fine grained soil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821892879.5U CN209215040U (en) 2018-11-16 2018-11-16 A kind of CBR test static pressure sample preparation device suitable for fine grained soil

Publications (1)

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CN209215040U true CN209215040U (en) 2019-08-06

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