CN203658201U - Device for measuring subgrade soil compactness - Google Patents

Abstract

The utility model discloses a device for measuring subgrade soil compactness. The device comprises an outer sleeve without a bottom surface, wherein the top end of the outer sleeve is fixedly connected with a linear lead screw stepping motor; an output shaft of the motor extends downwards into the outer sleeve, and is coincident with the axial lead of the outer sleeve; an inner sleeve without a top surface or a bottom surface is arranged in the outer sleeve coaxially; a rotary rod is arranged on the axial lead of the inner sleeve, and is fixedly connected with the inner sleeve through a fixing sheet; the upper end of the rotary rod is fixedly connected with the output shaft of the linear lead screw stepping motor; the lower end of the rotary rod is flush with the lower end face of the inner sleeve, and a blade is arranged at the lower end of the rotary rod; a first helical sliding chute is formed in the inner wall of the inner sleeve; a second helical sliding chute is formed in the inner wall of the outer sleeve; the lower end of the second sliding chute is connected with an opening formed in the side wall of the outer sleeve. The device further comprises a substrate, wherein a center hole of which the diameter is equal to the outer diameter of the inner sleeve is formed in the substrate; a chuck which is concentric with the center hole and of which the inner diameter is equal to the outer diameter of the outer sleeve is also arranged on the substrate.

Description

A kind of for measuring the device of subgrade soils compactness

Technical field

The utility model relates to a kind of device of measuring compactness, is specifically related to a kind of for measuring the device of subgrade soils compactness.

Background technology

In highway engineering construction, sand replacement method is the method for the most frequently used measurement packing, but the method exists many shortcomings, mainly contains the instrument fetching earth comparatively backward, conventionally cuts the earth with iron hammer and chisel, and inefficiency and precision are very poor; In addition, sand replacement method is to utilize the sand of single-size to remove the volume in displacement examination hole, need to carry the sand of more amount, and sand will be recycled in the process using, this just likely makes the earth in hole enter into the precision that causes some changes of the generation such as composition and density of sand to affect measurement result; And it is more to weigh number of times, the large test speed of sand using amount is slower; In addition, it is straight that the perisporium of testing pits in the time digging pit is difficult to guarantee, often occurs it being not exclusively that columniform hole makes measurement result have deviation.

Summary of the invention

The technical matters that the utility model patent will solve is for the deficiencies in the prior art, provides a kind of simple in structure, easy to operate, can guarantee under the condition of measuring accuracy, improves and measures efficiency, reduces the device of the measurement subgrade soils compactness of labour intensity.

In order to realize above-mentioned task, the technical scheme that the utility model patent adopts is:

For measuring a device for subgrade soils compactness, comprising:

Without the outer sleeve of bottom surface, the top of outer sleeve is consolidated with straight line screw mandrel stepper motor, and the output shaft of straight line screw mandrel stepper motor stretches in outer sleeve straight down, overlaps with the axial line of outer sleeve; In outer sleeve, be coaxially arranged with the inner sleeve without end face and bottom surface, on the axial line of inner sleeve, be provided with bull stick, bull stick and inner sleeve are fixed by stator, and the output shaft of the upper end of bull stick and straight line screw mandrel stepper motor is fixed, the lower end of bull stick flushes with the lower surface of inner sleeve, and blade is installed; On the inwall of inner sleeve, be provided with spirality the first chute, be provided with spirality the second chute on the inwall of outer sleeve, the lower end of the second chute is connected with the opening being arranged on outer sleeve sidewall;

This device also comprises a substrate, offers the center pit that diameter is identical with inner sleeve external diameter on substrate, on substrate, be also provided with center pit concentricity, and the internal diameter chuck identical with outer sleeve external diameter.

Further, the first described chute and the square section of the second chute are L shaped, and the width of the second chute is 1/3rd of outer sleeve internal diameter.

Further, on the bottom surface of described straight line screw mandrel stepper motor, be provided with console panel, on console panel, be provided with start button, reset button and stop button for controlling straight line screw mandrel stepper motor.

Further, the edge of substrate is provided with baffle plate.

Further, on straight line screw mandrel stepper motor, handle is installed.

The utility model is simple in structure, the loaded down with trivial details operation steps of original sand replacement method of greatly having simplified simple to operate; This device in measuring process because the hole coming outbreak out is just in time right cylinder, volume can directly be learnt by the diameter of drilling depth and measurement steel drum, omit the step of digging out the hole measurement volumes of coming with sand replacement, and save to utilize in filling sand process and measured the volume that digs out hole, also save the complicated processes of manually digging hole, effectively improved work efficiency.

Accompanying drawing explanation

Fig. 1 is one-piece construction schematic diagram of the present utility model;

Fig. 2 is the working state schematic representation of outer sleeve and inner sleeve;

Fig. 3 is the schematic appearance of outer sleeve;

Fig. 4 is the structural representation of inner sleeve;

Fig. 5 is the structural representation of the first chute/the second chute;

Number in the figure representative: 1-handle, 2-console panel, 3-straight line screw mandrel stepper motor, 4-bull stick, the 5-the second chute, 6-opening, the 7-the first chute, 8-inner sleeve, 9-blade, 10-stator, 11-center pit, 12-chuck, 13-substrate, 14-outer sleeve;

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figure 1, agent structure of the present utility model is coaxial outer sleeve 14 and the inner sleeve 8 arranging, outer sleeve 14 tops are provided with straight line screw mandrel stepper motor 3, output shaft and the bull stick 4 of straight line screw mandrel stepper motor 3 are fixed, when this motor can make bull stick 4 follow output shaft rotation, along the axially-movable of bull stick 4.On the bottom surface of straight line screw mandrel stepper motor 3, be provided with console panel 2, on console panel 2, be provided with start button, reset button and stop button for controlling straight line screw mandrel stepper motor 3; For the ease of carrying, on straight line screw mandrel stepper motor 3, handle 1 is installed.

Bull stick 4 is fixed by stator 10 with inner sleeve 8, when bull stick 4 rotates, can drive inner sleeve 8 to rotate together.Bull stick 4 bottoms flush with the lower surface of inner sleeve 8, in bull stick 4 lower ends, blade 9 are installed, and blade 9, with bull stick 4 rotations, can cut the soil body touching.Inner sleeve 8 inwalls are provided with spirality the first chute 7 from the bottom to top, for assist blade 9, the soil body cutting down are transported to top.The structure of inner sleeve 8 is shown in Fig. 4.After blade 9 High Rotation Speeds cut the soil body, because inner sleeve 8 is also in rotation, the soil body cutting down can move upward along with the first chute 7, and inner sleeve 8 does not have end face, and the soil body is finally pushed out from inner sleeve 8 tops; Blade 9, along with the running motion straight down always of motor, finally can dig out the cylindrical hole that diameter is identical with inner sleeve 8 in surface of contact rotation, and the motion state of inner sleeve 8 as shown in Figure 2.

Spirality the second chute 5 is set, as shown in Figure 3 on the inwall of outer sleeve 14; The second chute 5 is identical with the structure of the first chute 7, is all that square section is L shaped chute, as shown in Figure 5; From top to bottom arrange along outer sleeve 14 inwalls.The soil body is from inner sleeve 8 tops are released, and a part drops between two sleeves, and major part can be along with the second slideway skids off, and finally discharges from the opening 6 on outer sleeve 14 sidewalls.Unimpeded in order to guarantee the conveying of the soil body, the width of the second chute 5 should be set to 1/3rd of outer sleeve 14 internal diameters.

What match with outer sleeve 14 and inner sleeve 8 is a substrate 13, offers center pit 11 on substrate 13, and the diameter of center pit 11 is identical with the external diameter of inner sleeve 8, just holds inner sleeve 8 and enters wherein.And the coaxial chuck 12 arranging in center pit 11 outsides is for fixed jacket cylinder 14, its internal diameter is identical with the external diameter of outer sleeve 14, outer sleeve 14 firmly can be blocked.The soil body of discharging from outer sleeve 14 sidewall upper sheds 6, drops on substrate 13, for the ease of collecting, is also provided with baffle plate at substrate 13 edges.

Utilize the step of this measurement device soil compaction degree to mainly contain:

1. in test site, select a smooth road surface, and cleaned totally, its area must not be less than substrate 13 areas;

2. substrate 13 is placed on the road surface of cleaning, fixing base 13 surroundings, in case straight line screw mandrel stepper motor 3 changes the position of substrate 13 while working, affect measuring accuracy;

3. outer sleeve 14 is placed on substrate 13, outer sleeve 14 bottoms are just in time stuck on the chuck 12 of substrate 13, and make inner sleeve 8 just right with the center pit 11 of substrate 13; Then press the start button on console panel 2;

4. in the time that moving down into assigned address, presses by inner sleeve 8 stop button, the soil body digging out in this process is dropped in substrate 13 by the opening 6 on outer sleeve 14 sidewalls, subsequently the soil body on substrate 13, and the soil body between outer sleeve 14 and inner sleeve 8 collects with polybag, weighs and obtains quality m; And the volume of inner sleeve 8 is certain, the distance moving down according to inner sleeve 8, can obtain digging out the volume v of the soil body;

5. from the soil body digging out, take out representational sample, be placed in the enamel tray of aluminium box or cleaning, measure its water cut (w, in %);

6. calculate the dry density ρ of this soil body:

$\mathrm{\ρ}=\frac{m-\mathrm{mw}}{v}$

7. calculate the compactness of this subgrade soil:

The ratio of the maximum dry density obtaining according to the dry density of this soil body and shop experiment just can obtain the compactness of this subgrade soil.

Claims (5)

1. for measuring a device for subgrade soils compactness, it is characterized in that, comprising:

Without the outer sleeve (14) of bottom surface, the top of outer sleeve (14) is consolidated with straight line screw mandrel stepper motor (3), and the output shaft of straight line screw mandrel stepper motor (3) stretches in outer sleeve (14) straight down, overlaps with the axial line of outer sleeve (14); In outer sleeve (14), be coaxially arranged with the inner sleeve (8) without end face and bottom surface, on the axial line of inner sleeve (8), be provided with bull stick (4), bull stick (4) is fixed by stator (10) with inner sleeve (8), the output shaft of the upper end of bull stick (4) and straight line screw mandrel stepper motor (3) is fixed, the lower end of bull stick (4) flushes with the lower surface of inner sleeve (8), and blade (9) is installed; On the inwall of inner sleeve (8), be provided with spirality the first chute (7), be provided with spirality the second chute (5) on the inwall of outer sleeve (14), the lower end of the second chute (5) is connected with the opening (6) being arranged on outer sleeve (14) sidewall;

This device also comprises a substrate (13), on substrate (13), offer the center pit (11) that diameter is identical with inner sleeve (8) external diameter, on substrate (13), be also provided with center pit (11) concentricity, and the internal diameter chuck (12) identical with outer sleeve (14) external diameter.

2. as claimed in claim 1ly it is characterized in that for measuring the device of subgrade soils compactness, described the first chute (7) and the square section of the second chute (5) are L shaped, and the width of the second chute (5) is 1/3rd of outer sleeve (14) internal diameter.

3. as claimed in claim 1 for measuring the device of subgrade soils compactness, it is characterized in that, on the bottom surface of described straight line screw mandrel stepper motor (3), be provided with console panel (2), on console panel (2), be provided with start button, reset button and the stop button for controlling straight line screw mandrel stepper motor (3).

4. as claimed in claim 1ly it is characterized in that for measuring the device of subgrade soils compactness, the edge of substrate (13) is provided with baffle plate.

5. as claimed in claim 1ly it is characterized in that for measuring the device of subgrade soils compactness, handle (1) is installed on straight line screw mandrel stepper motor (3).

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