CN115420643A - Roadbed filler pulverization quantitative test device and determination method - Google Patents
Roadbed filler pulverization quantitative test device and determination method Download PDFInfo
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- CN115420643A CN115420643A CN202211125961.6A CN202211125961A CN115420643A CN 115420643 A CN115420643 A CN 115420643A CN 202211125961 A CN202211125961 A CN 202211125961A CN 115420643 A CN115420643 A CN 115420643A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
Abstract
The invention relates to the technical field of roadbed filler selection and testing, in particular to a roadbed filler pulverization quantitative testing device and a roadbed filler pulverization quantitative testing method, wherein the roadbed filler pulverization quantitative testing device comprises an annular track, a driving motor, a soil pressure box, a pressure testing groove, a pulverization rate testing groove, a rubber wheel, a connecting rod and a balance weight box; the pulverization rate test groove and the pressure test groove are respectively positioned on two symmetrical sides in the annular track, the pulverization rate test groove is used for filling filler, and the soil pressure box is arranged in the pressure test groove; the driving motor is arranged at the center of the annular track, the rubber wheel is connected with an output shaft of the driving motor through a connecting rod, and the rubber wheel can roll in the annular track at a constant speed and grind and rub the filler in the pulverization rate test groove; the rubber wheel is provided with the counterweight box, the counterweight box can load the counterweight block to realize different wheel pressures, the pulverization easiness degree of soil is judged by measuring pulverization rates of fillers with different blending ratios under different rolling times and different rolling pressures, and a basis can be provided for optimization of the blending ratio of the fillers.
Description
Technical Field
The invention relates to the technical field of roadbed filler selection and test, in particular to a roadbed filler pulverization quantitative test device and a roadbed filler pulverization quantitative test method.
Background
The completely weathered phyllite is widely distributed in northern parts of Jiangxi province, and the weathered phyllite is quickly converted into fine particles under the action of a road roller due to low hardness and high weathering degree, so that the rock-soil is called as rock-soil with thousand pieces. The phyllite soil contains a large amount of powder particles, the phyllite soil is low in cohesive force and lacks hardening property, the roadbed compactibility is poor, the phyllite soil is easy to pulverize under the combined action of sunlight and a truck, a loose soil layer is often formed when a transport filler dump truck walks on the phyllite soil, the formed loose soil layer is not easy to compact and clean, a loose soil interlayer is formed in the soil in real time during layering, and serious quality hidden troubles are caused for the roadbed. Meanwhile, the pulverized loose soil layer easily causes dust, PM2.5 on site is far higher than normal level, harm is caused to the body of construction workers, meanwhile, great influence is caused to the environment, and the environmental department is caused to strictly control construction of the construction site.
The fine-grained soil, especially the fine-grained soil, is easy to pulverize to form a loose interlayer, and can also cause dust raising during construction to cause great influence on construction units, but the fine-grained soil can be improved by adding red clay or cement, so that the harm caused by pulverization of the fine-grained soil is reduced. However, how to quantitatively measure the pulverization rate of fine-grained soil has no testing device at present, and when a field test is adopted, a roadbed test section needs to be established, so that the temperature condition and the rolling condition are not suitable to be controlled, the cost is higher, the quantitative measurement is not suitable, and the comparative pulverization rate of various improved schemes is not suitable. Therefore, a device and a test method capable of quantitatively measuring the pulverization rate of fine soil are urgently needed in engineering.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a roadbed filler pulverization quantitative test device and a test method, which can quantitatively evaluate the pulverization rate of fine-grained soil and quickly evaluate the pulverization rates of fillers with different proportions under the same condition.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
The invention provides a roadbed filler pulverization quantitative testing device which comprises an annular rail, a driving motor, a soil pressure box, a pressure testing groove, a pulverization rate testing groove, a rubber wheel, a connecting rod, a balance weight box, a balance weight and heating equipment, wherein the annular rail is arranged on the annular rail; the pulverization rate test groove and the pressure test groove are fan-shaped grooves and are respectively positioned on two symmetrical sides in the annular track, the pulverization rate test groove is used for filling filler, and the soil pressure box is arranged in the pressure test groove; the driving motor is arranged at the center of the annular track, a central bearing of the rubber wheel is connected with the connecting rod, the connecting rod is connected with an output shaft of the driving motor, the rubber wheel can roll in the annular track at a constant speed, and the filler in the test slot with powdering rate is rolled and rubbed; a counterweight box is arranged on the rubber wheel, and a counterweight block is arranged in the counterweight box; the heating equipment uses a fan heater, is fixed above the side of the pulverization rate test groove through a movable support and is used for heating the filler in the pulverization rate test groove, and the temperature measuring gun can be used for measuring the heating temperature of the filler.
Furthermore, the outer diameter of the annular track is 45cm, the inner diameter of the annular track is 30cm, the width of the annular track is 15cm, an annular rolling groove is formed, the rubber wheel can roll in the annular track at a constant speed, and the filler in the test groove with the pulverization rate is rolled and rubbed; the width of the annular track is 15cm, the width of the rubber wheel is 5cm, the width of the annular track is three times of the width of the rubber wheel, the rubber wheel can roll the filler in the test slot with the pulverization rate, and when the pressure of the filler exceeds the bearing capacity of the filler surface, the filler can be extruded from two sides of the rubber wheel so as to simulate the condition that the compacted filler roadbed surface is damaged under the overlarge pressure.
Further, the pulverization rate test slot is welded by a 10mm iron plate, the outer diameter of the test slot is 45cm, the inner diameter of the test slot is 30cm, the width of the test slot is 15cm, and the corresponding central angle is 30 degrees. The pulverization rate test groove is mainly used for testing the pulverization rate of fine soil, the width of the test groove is 15cm, the width of the test groove is three times that of a rubber wheel, and when the pressure of the rubber wheel on a filler surface exceeds the bearing capacity of the filler surface, the filler can be extruded out from two sides of the rubber wheel.
Further, the position of the pressure test groove is opposite to that of the pulverization rate test groove, the outer diameter is 45cm, the inner diameter is 30cm, the width is 15cm, and the corresponding central angle is 15 degrees. And arranging a soil pressure box with the diameter of 5cm at the center of the pressure test groove, filling materials with the same water content and the same compactness in the test groove with the pulverization rate are filled around the soil pressure box, wherein the embedding depth of the soil pressure box is 1cm, and the soil pressure test range is 50-1000kPa.
Furthermore, the driving motor is a low-speed motor, a loose-duty fixed-speed optical axis low-speed motor is adopted, the fixed speed of the motor is 15 r/min, the maximum power is 200W, a 220V power supply is adopted, and the driving motor is connected with a central bearing of the rubber wheel through a switching device and a connecting rod. And can drive the rubber wheels to roll in the annular track. The driving motor is fixed at the center of the equipment (namely the center of the annular track) through a bracket so as to ensure that the rubber wheel can roll at the middle position of the rolling groove.
Furthermore, a wheel hub is arranged in the middle of the rubber wheel, the wheel hub is connected with a central bearing through spokes, and the central bearing is connected with a driving motor through a connecting rod. The periphery of the hub is provided with a rubber tyre, and the rubber tyre is provided with a transverse pattern and two longitudinal patterns so as to simulate the rolling and friction of an automobile tire on the filler.
Furthermore, the welding has the counter weight box on the connecting rod, and the counter weight box is located the rubber wheel top, is equipped with the balancing weight in the counter weight box, can increase and reduce the rubber wheel through adding or reducing the balancing weight and to the pressure of pulverization rate test groove and the interior filler surface of pressure test groove.
Furthermore, the roadbed filler pulverization quantitative testing device is also provided with a data acquisition instrument, and the data acquisition instrument is electrically connected with the soil pressure cell through a data line and is used for acquiring pressure data on the surface of the filler.
On the other hand, the invention also provides a quantitative measuring method for roadbed filler pulverization, which comprises the specific steps of filling fillers with specific proportion, specific water content and specific compactness in a pulverization rate test slot and a pressure test slot, heating the fillers in the pulverization rate test slot by using a fan heater, starting a driving motor when the fillers are heated to 50 ℃, driving a rubber wheel to do circular motion in an annular track, and rolling and rubbing the fillers in the pulverization rate test slot; at the moment, the soil pressure is measured through the soil pressure box and the data acquisition instrument, when the soil pressure is inappropriate, the motor is immediately stopped, and the pressure of the rubber wheel on the filling surface is changed by changing the size or the number of the balancing weights; when the measured soil pressure meets the requirement, a formal test is started, and the rolling turns of the front rubber wheel are counted into the rolling times; after a certain number of rolling passes (e.g., 100 passes, 200 passes), loose soil formed in the test slot with the pulverization rate is collected, the weight of the loose soil after drying is measured, and the pulverization rate of the fine soil is quantitatively evaluated by the ratio of the weight of the dried loose soil to the dry weight of the filler in the test slot. The pulverization rate is determined by comparing the pulverization rates of the fillers with different ratios and the same rolling times, and the optimized ratio is determined by less pulverization rates.
The invention has the beneficial effects that:
(1) The miniaturization of the test equipment reduces the workload of a field test section and saves the test cost.
The traditional quantitative evaluation of the pulverization rate of the fine grained soil needs to be measured through a field test section, the test time is long, and the cost is high.
(2) The amount of the test filler is reduced, and the selection of the fillers with various proportions is conveniently carried out.
The traditional test section needs a large amount of filler (about 106 tons is needed in a single-line test section according to a 50m test section) for testing the pulverization rate, if N proportions are needed, N x 106 tons of filler are needed for completing the test, and a large amount of filler and large-scale construction machinery are needed. After the method is adopted, each proportion only needs a small amount of filler (about 18 kilograms) to finish pulverization quantitative evaluation, so that the test cost can be saved, the selection of a large amount of filler proportions is convenient to carry out, and the method is particularly suitable for mixed pulverization determination of thousands of rock soil and red clay.
(3) Convenient control of test conditions
The pulverization of fine soil is generally tested under the conditions of sunshine heating, certain pressure, specific compactness and specific water content. The traditional test section test is inconvenient to control the test conditions, for example, the pulverization of fine soil is tested under the sunshine warming condition, the temperature of the filler is required to be approximately the same, and the temperature and the water content can not be controlled in the field test, if the rainfall weather is met. In addition, during the powdering test, the pressure of the transport filler vehicle on the road surface is required to be approximately the same, but the pressure of the field tire on the road surface is controlled by the quantity of the filler loaded on the vehicle, so the variation is large. After the invention is adopted, the temperature of the filler can be controlled by the heating time of the fan heater, and the indoor test can prevent the test from being influenced by rainfall. The rubber wheel is controlled through the weight of the balancing weight to control the pressure of the filler, the rolling times are controlled through controlling the circumference of the rubber wheel around the rolling groove, and the variable can be controlled accurately.
(4) Convenient pulverization rate quantitative determination
The method for measuring the fine-grained soil pulverization rate of the roadbed test section needs to collect the pulverized fine-grained soil of a roadbed (such as a long 5m area in a 100m test section) in a long distance, the roadbed surface is wide, the friction of a road section where an automobile runs is uneven, the amount of the soil is large and difficult to collect, and the soil amount needs to be measured after being dried for a long time. After the method is adopted, only a small amount of pulverized soil in the test groove needs to be collected, the pulverized soil is dried and measured to obtain the pulverization rate, and the optimal proportion can be selected by comparing the pulverization rates of the fillers with different proportions.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of a main structure of the roadbed filler pulverization quantitative testing device.
FIG. 2 is a top view of a rolling slot, a powdering ratio test slot, and a pressure test slot in accordance with an embodiment of the present invention.
FIG. 3 is a schematic structural view of a rubber wheel, a weight box and a weight block in the embodiment of the invention.
Explanation of reference numerals: the method comprises the following steps of 1-an annular track, 2-a soil pressure box, 3-a data acquisition instrument, 4-a pressure test slot, 5-a rolling slot, 6-a rubber wheel, 7-a driving motor, 8-a connecting rod, 9-a rolling track, 10-a balancing weight, 11-a balancing weight box, 12-a powdering rate test slot, 13-a spoke, 14-a warm air blower and 15-a temperature measuring gun.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention, taken in conjunction with the accompanying drawings and detailed description, is set forth below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and in the claims of the present application does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
The combination device mainly comprises an annular track 1, a soil pressure box 2, a data acquisition instrument 3, a pressure test slot 4, a low-speed driving motor 7, a rubber wheel 6, a pulverization rate test slot 12, a counterweight box 11 and heating equipment. The pulverization rate test slot 12 and the pressure test slot 4 are fan-shaped slots and are respectively positioned at two sides in the annular track 1, the pulverization rate test slot 12 is used for filling filler, the soil pressure box 2 is arranged in the pressure test slot 4, and the soil pressure box 2 is electrically connected with the data acquisition instrument 3 through a data line and is used for acquiring pressure data on the surface of the filler; the driving motor 7 is arranged at the center of the annular track 1, a center bearing of the rubber wheel 6 is connected with the connecting rod 8, the connecting rod 8 is connected with an output shaft of the driving motor 7, the rubber wheel 6 can roll in the annular track 1 at a constant speed, and the filler in the pulverization rate test slot 12 is rolled and rubbed; a counterweight box 11 is arranged on the rubber wheel 6, and a counterweight block 10 is arranged in the counterweight box 11; the heating equipment comprises a warm air blower 14 and a temperature measuring gun 15, and is used for heating the filler in the test slot with the pulverization rate to 50 ℃, heating the test slot with the pulverization rate through the warm air blower, and simulating the heating of sunlight on the roadbed filler in the rolling process, so that the test environment is close to the actual condition.
In the embodiment, the low-speed driving motor 7 adopts a loose-duty constant-speed optical axis low-speed motor, the fixed rotation speed of the motor is 15 r/min, the rated power is 200W, a 220V power supply is adopted, and the motor is connected with a central bearing of the rubber wheel 6 through a switching device and a connecting rod 8. The motor drives the rubber wheel to rotate around the center through the connecting rod, and the rubber wheel rolls in the rolling groove at a constant speed. The driving motor is fixed at the center of the equipment through a support to ensure that the rubber wheel can roll in the middle of the rolling groove.
As shown in figure 1, the invention adopts the annular track, so that the simulated automobile rubber wheel can roll in the rolling groove at a constant speed, and the filler in the test groove is rolled and rubbed, thereby pulverizing the fine soil. As shown in fig. 2, the circular track has an outer diameter D of 45cm, an inner diameter D of 30cm and a width of 15cm, and forms a circular rolling groove 5, so that the rubber wheel 6 can roll in the rolling groove 5 and roll the filler in the pressure test groove 4 and the powdering rate test groove 12, and a rolling track 9 of the rubber wheel 6 is shown by a dotted line in fig. 2. Except for the powdering rate test groove and the pressure test groove in the annular track, the bottom surface of the annular groove is flush with the top surfaces filled with the filler in the powdering rate test groove and the pressure test groove, namely, the rubber wheels are ensured to roll in a plane.
And one side of the annular track 1 is provided with a pulverization rate test slot 12, the pulverization rate test slot is welded by a 10mm iron plate, the outer diameter of the pulverization rate test slot is 45cm, the inner diameter of the pulverization rate test slot is 30cm, the width of the pulverization rate test slot is 15cm, the depth of the pulverization rate test slot is 15cm, and the corresponding central angle of the pulverization rate test slot is 30 degrees. The pulverization rate test groove 12 is mainly used for testing pulverization rate of fine soil, the width of the pulverization rate test groove is 15cm, the pulverization rate test groove is three times of that of a rubber wheel, and when the pressure of the rubber wheel on a filler surface exceeds the bearing capacity of the filler surface, the filler can be extruded out from two sides of the rubber wheel. When filling, the filling material can be compacted in three layers, and the degree of compaction is controlled by calculating the corresponding thickness of the soil according to the specified amount.
The other side of the annular track 1 is provided with a pressure test slot 4, the pressure test slot is welded by a 10mm iron plate, the outer diameter of the pressure test slot is 45cm, the inner diameter of the pressure test slot is 30cm, the width of the pressure test slot is 15cm, the depth of the pressure test slot is 15cm, and the corresponding central angle of the pressure test slot is 15 degrees. The soil pressure box 2 with the diameter of 5cm is arranged at the center of the pressure test groove, filler with the same water content and the same compactness in the test groove with the pulverization rate is filled around the soil pressure box, the embedding depth of the soil pressure box is 1cm, and the soil pressure test range is 50-1000kPa. The purpose of arranging the pressure test groove is to measure the pressure of the rubber roller on the roadbed filling surface and determine the size of the balance weight according to the size of the pressure.
The rubber wheel 6 is a vacuum tire and adopts a metal hub, the vacuum tire is connected with the metal hub, the metal hub is connected with an intermediate bearing through a spoke 13, and the intermediate bearing is connected with a driving motor 7 through a connecting rod 8. When the driving motor rotates, the rubber wheel rotates around the center of the circular track and forms a rolling track 9 in the rolling groove 5. When the rubber wheel passes through a test groove with a powdering ratio, the filler is loosened and powdering is caused. When the rubber wheel passes through the pressure test groove, the pressure of the rubber wheel on the surface of the packing can be measured through the soil pressure box 2.
In order to change the pressure of the rubber wheels on the filling surface, the size or the number of the counter weights 10 in the weight box 11 can be changed.
The fine soil pulverization test method comprises the following specific steps:
for convenience of explanation, the fully weathered phyllite (also called rock-soil) is taken as an example, and the phyllite soil is very easy to pulverize due to low cohesive force. In order to improve the chalking performance of the phyllite, the red clay with high cohesive force can be added into the phyllite, and the dry mass blending proportion of the red clay is designed to be 5:0,5:1,5:2,5:3,5:4, preparing 40kg of dry mixed soil in each proportion. The five proportions of fillers are respectively and uniformly mixed, the water content is calculated according to the water content of 18 percent (the optimal water content), the mixture is uniformly mixed and then put into a sealing bag to be sealed for 24 hours, and the mixture can be turned for 2 to 3 times in the bag during the material sealing period, so that the soil particles can fully absorb water. The weight of the filler required to be added is calculated by the volume of a test groove with three compactibility degrees of 89%, 91% and 95%, and the maximum dry density is 1.70g/cm 3 The dry density of the three compaction fillers then corresponds to 1.513g/cm 3 、1.547g/cm 3 And 1.615g/cm 3 Grouping test; in each test group, the filler is divided into three layers according to the same compaction degree, the filler is compacted in a test groove with the pulverization rate by a compacting method, and the top surface of the last layer is flush with other parts of the rolling groove. The pressure test groove adopts the compactness the same as that of the pulverization rate test groove, and when the third time of compaction is carried out, the soil pressure box is buried, a data line of the soil pressure box is led out of the rolling groove, and the soil pressure box is connected with the data acquisition instrument through the data line and used for acquiring pressure data of the rubber wheel rolling filler.
And heating the surface of the filler of the powdering ratio test groove 12 by using a fan heater 14, testing the surface temperature of the filler by using a temperature measuring gun 15, keeping heating for 20 minutes when the temperature reaches 50 ℃, and keeping the fan heater away from a heating area or turning off the fan heater when the temperature exceeds 50 ℃. And starting the motor, rolling the rubber wheel in the rolling groove, and recording the soil pressure through the soil pressure box 2 and the data acquisition instrument 3. When the soil pressure is not appropriate, the motor is immediately stopped, and the pressure of the rubber wheel on the filling surface is changed by changing the size or the number of the balancing weights 10 in the balancing weight box 11. When the measured soil pressure meets the requirement (for example, the standard pressure of a carrier vehicle is 700 kPa), a formal test is started, and the rolling turns of the front rubber wheel are counted into the rolling passes.
The filler in the test groove with powdering rate is loosened through rolling, and the powdering rate of the filler is evaluated through testing the dry mass ratio of the loosened filler to the dry soil mass ratio of the filler in the test groove with powdering rate. When the rolling times reach 100 times, cleaning loose soil on the surface of the test groove with the pulverization rate by using a brush and collecting the loose soil, drying the collected loose soil sample, and weighing the dry mass of the dried soil samplemd, setting the dry mass of the filling filled in the test slot with the powdering ratio asm0, then filler pulverization rateδ= md/m0 × 100%. The above test method is adopted for fillers with different proportions to obtain the change rule of different fillers along with the proportion, and the proportion with less pulverization rate of the fillers is taken as the optimized proportion.
The test device and the test method can quantitatively evaluate the pulverization rate of the fine soil, can control the temperature, the rolling times and the rolling pressure, can quickly evaluate the pulverization rates of the fillers with different proportions under the same condition, and provide a basis for the selection of the fillers.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A roadbed filler pulverization quantitative testing device is characterized by comprising an annular rail, a driving motor, a soil pressure box, a pressure test groove, a pulverization rate test groove, a rubber wheel, a connecting rod, a balance weight box, a balance weight and heating equipment; the pulverization rate test groove and the pressure test groove are fan-shaped grooves and are respectively positioned on two sides in the annular track, the pulverization rate test groove is used for filling filler, and the soil pressure box is arranged in the pressure test groove; the driving motor is arranged at the center of the annular track, a center bearing of the rubber wheel is connected with the connecting rod, the connecting rod is connected with an output shaft of the driving motor, a counterweight box is arranged on the rubber wheel, and a counterweight block is arranged in the counterweight box; the heating equipment comprises a fan heater and a temperature measuring gun and is used for drying the filler in the test slot with the pulverization rate.
2. The roadbed filler pulverization quantitative test device as claimed in claim 1, wherein the width of the annular track is three times of that of the rubber wheel, the rubber wheel can roll in the annular track at a constant speed, and the filler in the pulverization rate test groove is rolled and rubbed; and the width of the powdering ratio test groove and the pressure test groove is three times of that of the rubber wheel, and when the pressure applied by the rubber wheel exceeds the bearing capacity of the filling surface, the filling soil can be extruded from the side surface of the rubber wheel.
3. The device for quantitatively testing pulverization of the roadbed filler according to claim 1, wherein the pressure test groove is arranged opposite to the pulverization rate test groove in position, the corresponding central angle of the pulverization rate test groove is 30 degrees, and the corresponding central angle of the pressure test groove is 15 degrees.
4. The device for quantitatively testing pulverization of the roadbed filler as claimed in claim 1, wherein the soil pressure box is located at the center of the pressure test groove, the embedding depth of the soil pressure box is 1cm, and the test range of the soil pressure box is 50-1000kPa.
5. The roadbed filler pulverization quantitative test device as claimed in claim 1, wherein a hub is arranged in the middle of the rubber wheel, the hub is connected with a central bearing of the rubber wheel through spokes, and the central bearing is connected with a driving motor through a connecting rod; the periphery of the hub is provided with a rubber tyre, and the rubber tyre is provided with a transverse pattern and two longitudinal patterns for simulating rolling and friction of an automobile tire on the filler.
6. The roadbed filler pulverization quantitative test device of claim 1, wherein the roadbed filler pulverization quantitative test device is further provided with a data acquisition instrument, and the data acquisition instrument is connected with the soil pressure cell through a data line.
7. A roadbed filler pulverization quantitative determination method is characterized by comprising the following steps:
(1) Filling fillers with specific proportion, specific water content and specific compaction degree in the powder rate test groove, filling fillers with the same proportion, water content and compaction degree as those in the powder rate test groove in the pressure test groove, and embedding a soil pressure box in the depth position 1cm below the filler surface in the pressure test groove;
(2) Heating the filler in the powdering rate test slot by using a warm air blower, starting a driving motor when the filler is heated to 50 ℃, driving a rubber wheel to do circular motion in an annular track, and rolling and rubbing the filler in the powdering rate test slot and the pressure test slot;
(3) After specific rolling passes, collecting loose soil formed in the test slot with the pulverization rate, drying, measuring the weight of the loose soil, and quantitatively evaluating the pulverization rate of fine-grained soil by the ratio of the weight of the dried loose soil to the total mass of dry soil in the test slot; the optimized proportion is determined by comparing the pulverization rates of fillers with different proportions and the same rolling times and with smaller pulverization rates.
8. The method for quantitatively measuring the pulverization of the roadbed filler according to claim 7, wherein the filler is rock soil with thousands of rock soil and red clay, and the dry mass blending ratio of the rock soil to the red clay is 5:0 to 5:4, the mixed soil had a water content of 18% and a degree of compaction of 89%, 91% or 95%.
9. The method for quantitatively determining powdering of a road-based filler according to claim 7, wherein the number of passes of rolling compaction is selected from 100 passes, 200 passes and 300 passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211125961.6A CN115420643A (en) | 2022-09-16 | 2022-09-16 | Roadbed filler pulverization quantitative test device and determination method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211125961.6A CN115420643A (en) | 2022-09-16 | 2022-09-16 | Roadbed filler pulverization quantitative test device and determination method |
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| CN115420643A true CN115420643A (en) | 2022-12-02 |
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| CN202211125961.6A Pending CN115420643A (en) | 2022-09-16 | 2022-09-16 | Roadbed filler pulverization quantitative test device and determination method |
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2022
- 2022-09-16 CN CN202211125961.6A patent/CN115420643A/en active Pending
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