CN110702186B - Pit digging volume detection device and method for detecting roadbed compactness by pit digging and water filling method - Google Patents
Pit digging volume detection device and method for detecting roadbed compactness by pit digging and water filling method Download PDFInfo
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- CN110702186B CN110702186B CN201910825568.XA CN201910825568A CN110702186B CN 110702186 B CN110702186 B CN 110702186B CN 201910825568 A CN201910825568 A CN 201910825568A CN 110702186 B CN110702186 B CN 110702186B
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- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
Abstract
The invention relates to a pit digging and watering method roadbed compactness detection pit digging volume detection device, which comprises one or more than two measurement units, wherein each measurement unit comprises a detection cover, an elastic membrane is fixed at the bottom of the detection cover in a sealing manner, a water through hole for leading water to the upper side of the elastic membrane to deform the elastic membrane is arranged on the detection cover, and the upper end of the water through hole is connected with a liquid level display pipe for displaying the liquid level height. The invention provides a pit volume detection device for detecting roadbed compactedness by a pit digging and watering method for obtaining detection hole volume through watering and a pit volume detection method using the pit volume detection device.
Description
Technical Field
The invention relates to a method and a device for detecting the volume of a pit for detecting the compaction degree of a roadbed by a pit digging and water filling method.
Background
The roadbed compactness is one of key indexes for roadbed and pavement construction quality detection, the density condition after on-site compaction is represented, and the higher the compactness is, the higher the density is, and the better the overall performance of the material is.
For roadbed, semi-rigid base course of road surface and flexible base course of granular material, the compactness is the ratio of dry density actually reached in construction site to the maximum dry density obtained by indoor standard experiment; for asphalt surface course and asphalt stabilized base course, the degree of compaction is the ratio of the density achieved on site to the indoor standard density. Therefore, the determination of the compactness of the roadbed mainly comprises the determination of indoor standard density (maximum dry density) and field density test.
The indoor standard density is easy to measure, so the key of the compactness detection lies in the field density test, the pit digging method detection is a common field density test mode, the basic working mode is to dig a detection pit on the detected road surface, the weight of the material taken out from the pit digging can be weighed after the material is dried, sand is filled into the detection pit through a funnel, after the detection pit is filled with the sand, the volume of the detection pit is obtained through the difference between the volume of the original sand in the funnel and the volume of the residual sand in the funnel, and then the field compactness of the roadbed is obtained through calculation. Obtaining the detection pore volume by sand-casting presents the following problems: after the detection is finished, the sand in the detection hole needs to be taken out and screened again for the next use, so that the working labor intensity is high; in addition, due to the fluidity of sand, when the surface of the road surface to be dug is uneven, the detection pore volume cannot be accurately obtained.
Disclosure of Invention
The invention aims to provide a pit digging and watering method roadbed compactness detection pit digging volume detection device which obtains the volume of a detection hole through water filling; the invention also aims to provide a pit volume detection method using the pit volume detection device.
In order to solve the technical problems, the technical scheme of the invention is as follows:
excavation irrigation method road bed compactness detects with volume detection device that excavates pit, including one or two more measuring unit, every measuring unit all including detecting the lid, detects the sealed elastic membrane that is fixed with in lid bottom, detects to cover be provided with be used for to the elastic membrane upside leads to water and makes the limbers that the elastic membrane warp, and the upper end of limbers is connected with the liquid level display pipe that is used for showing the liquid level height.
The upper end of the liquid level display tube is connected with an air pressure cavity, and the pit digging volume detection device further comprises a pressure adjusting device for adjusting the pressure of the air pressure cavity.
The pressure adjusting device comprises a pressure adjusting piston which is in guide sealing fit with the wall of the air pressure cavity.
The elastic membrane is made of a silica gel material.
The measuring unit has two, and one of them measuring unit is first measuring unit, and another measuring unit is the second measuring unit, and the elastic membrane of first measuring unit is for spreading the plane membrane structure of road bed surface before waiting to dig the hole region and dig the hole, and the elastic membrane of second measuring unit is for spreading the cylindric membrane structure of detecting the hole inner bore wall.
The bottom of the detection cover of the first measurement unit is provided with a first reference plane at the periphery of the elastic membrane, and the first measurement unit further comprises a reference plate which is used for being arranged on the upper surface of the lower side of the elastic membrane of the first measurement unit and is used for being attached to the first reference plane.
The bottom of the detection cover of the second measurement unit is provided with a second reference plane at the periphery of the elastic membrane, the second measurement unit further comprises a reference cylinder arranged on the lower side of the elastic membrane of the second measurement unit, and the reference cylinder is provided with an upper surface used for being attached to the second reference plane to form a cylinder edge.
The method comprises the following steps of firstly, placing a corresponding measuring unit on the surface of a position to be dug of a roadbed to be detected, fully paving the roadbed surface in front of a hole to be dug area under the action of liquid on the upper side of an elastic membrane to obtain the volume V1 of the uneven part of the front surface of the hole to be dug area under the action of the liquid, secondly, digging a detection hole in the hole to be dug area, placing the corresponding measuring unit on the upper end of the detection hole, fully paving the hole wall of the detection hole under the action of the liquid on the upper side of the elastic membrane to obtain the volume V2 between the bottom of the detection hole and the roadbed surface, wherein the volume V = V2-V1 of the detection hole.
The measuring unit used in the first step is a first measuring unit, the measuring unit used in the second step is a second measuring unit, the elastic membrane of the first measuring unit is a planar membrane structure used for fully paving the roadbed surface in the hole digging region to be dug before digging the hole, and the elastic membrane of the second measuring unit is a cylindrical membrane structure used for fully paving the inner hole wall of the detection hole.
Before the first step, the reference plate is abutted against the lower side of the annular pressure plate of the first measuring unit, the liquid level scales Vn in the liquid level display pipe are displayed, and in the first step, after the elastic membrane is paved on the roadbed surface in front of the hole digging area, the liquid level scales Vm of the liquid level display pipe are displayed, and V1= Vm-Vn; before the second step, the reference cylinder is abutted against the lower side of the annular pressing plate of the second measuring unit, the inner cavity of the whole reference cylinder is fully paved by the second measuring unit, the liquid level scale Va in the liquid level display pipe is displayed, in the second step, after the detection hole is fully paved by the elastic membrane, the liquid level scale Vc, V2= Vc- (Va-Vb) in the liquid level display pipe is displayed, and Vb is the volume of the inner cavity of the reference cylinder.
The invention has the beneficial effects that: in the invention, the bottom of the detection cover is hermetically fixed with the elastic membrane, when in use, the upper side of the elastic membrane is provided with liquid for filling the detection hole, when in use, aiming at uneven road surfaces, the first step can be firstly carried out, and the corresponding measuring unit is arranged on a position meter of the to-be-dug hole of the roadbed to be detectedUnder the action of liquid on the upper side of the elastic membrane, the elastic membrane is paved on the surface of the roadbed before the hole is dug in the hole area to be dug, and the volume V of the uneven part of the front surface of the hole in the hole area to be dug is obtained1Then, the second step is carried out, the detection hole is dug out in the region to be dug, the corresponding measuring unit is arranged at the upper end of the detection hole, under the action of liquid on the upper side of the elastic membrane, the elastic membrane is fully paved on the hole wall of the detection hole, and the volume V between the hole bottom of the detection hole and the surface of the roadbed is obtained2Volume of detection well V = V2- V1. The device can be suitable for detecting the volume of the dug pit on the uneven road surface, and in addition, due to the existence of the elastic membrane, no liquid is leaked, so that the problem that the liquid is recovered at the later stage does not exist, and the labor intensity of operators is reduced.
Drawings
FIG. 1 is a schematic view of the condition of a roadbed before digging a pit according to the invention;
FIG. 2 is a schematic view illustrating a state in which a first measuring unit detects a roadbed before a pit is excavated;
FIG. 3 is a schematic view of the first measurement unit of the present invention in cooperation with a reference plate;
FIG. 4 is a diagram illustrating a second measuring unit for detecting the subgrade after excavation according to the present invention;
FIG. 5 is a schematic view of the second measuring unit of the present invention in cooperation with a reference cylinder;
FIG. 6 is a schematic view showing the second measuring unit of FIG. 5 after the elastic membrane has been spread over the entire inspection hole.
Detailed Description
An embodiment of a pit volume detection device for detecting the degree of compaction of a roadbed by a pit irrigation method is shown in FIGS. 1 to 6: including two measuring unit, two measuring unit are first measuring unit 3 and the second measuring unit 16 that successively uses respectively, and each measuring unit all includes the detection lid, and the bottom seal of detection lid is fixed with the elastic membrane, and in this embodiment, the detection lid includes upper portion lid 11 and the annular clamp plate 12 of fix with screw in upside lid bottom, and the elastic membrane presss from both sides to be established and is fixed in between upper portion lid 11 and annular clamp plate 12, has stock solution chamber 15 between the middle part of upper portion lid 11 and the elastic membrane. The bottom of the annular pressure plate forms a reference plane perpendicular to the up-down direction on the periphery of the elastic membrane, and specifically, in the present embodiment, the reference plane on the first measurement unit is referred to as a first reference plane 14, and the reference plane on the second measurement unit 16 is referred to as a second reference plane 17. The elastic membranes of the first measuring unit and the second measuring unit are made of silica gel materials, the first measuring unit and the second measuring unit are different, in this example, the volume difference between the measured pore volume after excavation and the irregularities of the roadbed surface before excavation is large, it is not easy to use the same elastic membrane for the first and second measuring units, because if the same elastic membrane is used, the requirement on the elastic deformation capacity of the elastic membrane is high, the elastic membrane is easy to break because of overlarge deformation amplitude, therefore, in the present embodiment, the elastic membrane 13 of the first measuring unit is a planar membrane structure for covering the roadbed surface before the excavation of the hole area to be excavated, and the elastic membrane 18 of the second measuring unit is a cylindrical membrane structure for covering the inner hole wall of the detection hole 19, that is, the shape of the elastic membrane 18 of the second measuring unit is consistent with the shape of the detection hole, and is more easily deformed to cover the whole detection hole 19.
The detection cover of each measuring unit is provided with a water through hole 9 which is used for leading water to the liquid storage cavity 15 on the upper side of the elastic membrane to deform the elastic membrane, the upper end of the water through hole is connected with a liquid level display pipe 10 used for displaying the liquid level height, the liquid level display pipe 10 is a vertical transparent straight pipe, and the liquid level display pipe is provided with volume scales 20 arranged along the vertical direction. And a scale pointer 8 which can be manually operated and can move up and down is arranged beside the liquid level display pipe. The upper end of the liquid level display tube is connected with an air pressure cavity 6, the pit digging volume detection device further comprises a pressure adjusting device used for adjusting the pressure of the air pressure cavity, in the embodiment, the pressure adjusting device comprises a pressure adjusting piston 4 in guide sealing fit with the wall of the air pressure cavity, the upper end of the liquid level display tube is connected with a horizontal tube 5 through an inverted U-shaped tube 7, and the pressure adjusting piston is assembled in the horizontal tube 5. The first measuring unit further comprises a reference plate 20 for placing on the upper surface of the underside of the elastic membrane of said first measuring unit for being arranged against the first reference plane 14. The second measuring unit further comprises a reference cylinder 21 for placing on the underside of the elastic membrane of said second measuring unit, the reference cylinder having an upper surface for placing a cylinder rim 22 against the second reference plane.
The pit digging volume detection device provided by the invention has the following use process: as shown in fig. 1, when the field density detection of the roadbed 1 is carried out outdoors, the pits 2 are often formed on the roadbed surface, and the problem of inaccurate volume detection data exists if the pits are directly dug to carry out the volume measurement of the detection holes. When the device is used, water is injected on the upper side of the elastic membrane, in the invention, the first detection unit is firstly arranged at the upper end of the to-be-dug hole area of the roadbed, as shown in figure 2, the piston is pushed and pressed, so that the elastic membrane is fully paved at the upper end of the whole to-be-dug hole area under the pressure of liquid on the upper side of the elastic membrane, and the volume of pits (or bulges) on the surface of the roadbed in the to-be-dug hole area, namely the volume V of the uneven part on the front surface of the to-be-dug hole1. Then remove first detecting element, treat to dig the hole region and dig the hole, dig the inspection hole, then arrange the detection lid of second detecting element in the inspection hole upper end, the inspection hole is arranged in to the elastic membrane of second detecting element, through moving the piston towards the left side, increase the pressure that the side liquid received on the elastic membrane for the elastic membrane spreads whole inspection hole, and the change of liquid level height obtains the volume V of inspection hole bottom apart from roadbed surface among this in-process liquid level display tube2And then the volume of the detection hole is V = V2- V1。
In the invention, the reference plate and the reference cylinder are arranged to obtain a reference scale, because in the actual use process, the deformation capability of the silica gel is influenced by factors such as temperature, sunlight, the service life of the silica gel and the like, and in addition, the existence of factors such as water leakage and the like can also exist, the scale value of the liquid level on the liquid level display tube can be changed when the liquid level display tube is not used due to various factors, for the first measuring unit, the reference plate is abutted against the lower side of the annular pressure plate, and the scale V of the liquid level in the liquid level display tube at the momentnThen V isnEquivalent to zero point scale, when the elastic film is fully paved on the roadbed surface of the region to be dug, the liquid level scale V in the liquid level display pipemThen V is1=Vm-Vn. For the second detection unit, the volume of the cavity of the reference cylinder is fixedBefore the elastic membrane of the two measurement units is fully paved on the whole detection hole, in order to obtain the deformation difference of the elastic membrane, the reference cylinder can be firstly propped against the lower side of the annular pressing plate of the second measurement unit, the whole reference cylinder is fully paved through the elastic membrane, and at the moment, the liquid level scale V in the liquid level display tubeaHowever, the true liquid level volume should be consistent with the cavity volume of the reference cylinder, assuming that the cavity volume of the reference cylinder is VbIf V isaAnd VbIf the difference is not consistent, a volume measurement error is present during detection, and the volume measurement error = Va-VbWhen the elastic film of the second measuring unit is fully paved on the whole detection hole, the liquid level scale in the corresponding liquid level display pipe is VcThen V is2=Vc-（Va-Vb). FIG. 5 is a schematic view of the state in which the upper side of the elastic membrane 18 of the second measuring unit is subjected only to the pressure of the liquid; fig. 6 is a schematic view showing a state where the elastic film of the second measuring unit is fully spread over the entire reference cylinder after the piston of the second measuring unit is pushed to the left.
In other embodiments of the present invention, the gas pressure of the pneumatic chamber may also be adjusted without moving the piston, for example, by pumping gas into the pneumatic chamber by a gas pump; the pressure regulating device may not be provided when, for example, if the liquid pressure on the upper side of the elastic membrane is sufficient to cause the elastic membrane to be spread over the corresponding portion; the elastic membrane may also be made of latex; when the volume of the detection hole is small and the elastic membrane of the first detection unit is deformed enough to be capable of fully paving the whole detection hole, only one measurement unit can be provided; the scale pointer can be omitted, and an operator can take the pen to record the liquid level scales in the liquid level display tube at any time.
The method comprises the following steps of firstly, placing a first measuring unit on the surface of a position to be dug of a roadbed to be detected, fully paving the roadbed surface in front of a hole in a region to be dug by an elastic membrane under the action of liquid on the upper side of the elastic membrane, and obtaining the volume V between the upper surface in front of the hole in the region to be dug and the roadbed surface1Secondly, digging a detection hole in the region to be dug, placing a second measurement unit at the upper end of the detection hole, and collecting the liquid on the upper side of the elastic membraneUnder the action of force, the elastic film is fully paved on the hole wall of the detection hole to obtain the volume V between the bottom of the detection hole and the surface of the roadbed2Volume of detection well V = V2- V1. The first measuring unit is the same as the first measuring unit in each of the above-described pit volume detecting device embodiments, and the second measuring unit is the same as the second measuring unit in each of the above-described pit volume detecting device embodiments.
The elastic membrane of the first measuring unit is a planar membrane structure used for fully paving the roadbed surface in front of the hole digging of the hole area to be dug, and the elastic membrane of the second measuring unit is a cylindrical membrane structure used for fully paving the inner hole wall of the detection hole.
Before the first step, the reference plate is abutted against the lower side of the annular pressure plate of the first measuring unit, and at the moment, the liquid level scale V in the liquid level display tubenIn the first step, after the elastic film is paved on the roadbed surface before the hole is dug in the hole area to be dug, the liquid level scale V of the liquid level display tubem， V1=Vm-Vn(ii) a Before the second step, the reference cylinder is propped against the lower side of the annular pressure plate of the second measuring unit, the second measuring unit is paved on the inner cavity of the whole reference cylinder, and at the moment, the liquid level scale V in the liquid level display tubeaIn the second step, after the elastic membrane is fully paved on the detection hole, the liquid level scale V in the liquid level display tubec，V2=Vc-（Va-Vb），VbIs the volume of the inner cavity of the reference cylinder.
Claims (6)
1. Excavation irrigation method road bed compactness detects with volume detection device that excavates pit, its characterized in that: including two measuring unit, every measuring unit all is including detecting the lid, detects the sealed elastic membrane that is fixed with in lid bottom, detect to cover be provided with be used for to elastic membrane upside leads to water and makes the limbers that elastic membrane warp, the upper end of limbers is connected with the liquid level display pipe that is used for showing the liquid level height, the elastic membrane is made by silica gel material or latex material, one of them measuring unit is first measuring unit, another one measuring unit is the second measuring unit, first measuring unit's elastic membrane is for being used for paving the road bed surface's before waiting to dig the hole region road bed surface structure of digging hole, the elastic membrane of second measuring unit is for being used for paving the cylindric membrane structure of detecting the downthehole pore wall of hole.
2. The excavation volume detection apparatus according to claim 1, wherein: the upper end of the liquid level display tube is connected with an air pressure cavity, and the pit digging volume detection device further comprises a pressure adjusting device for adjusting the pressure of the air pressure cavity.
3. The excavation volume detection apparatus according to claim 2, wherein: the pressure adjusting device comprises a pressure adjusting piston which is in guide sealing fit with the wall of the air pressure cavity.
4. The excavation volume detection apparatus according to claim 1, wherein: the bottom of the detection cover of the first measurement unit is provided with a first reference plane at the periphery of the elastic membrane, and the first measurement unit further comprises a reference plate which is used for being arranged on the upper surface of the lower side of the elastic membrane of the first measurement unit and is used for being attached to the first reference plane.
5. The excavation volume detection apparatus according to claim 1, wherein: the bottom of the detection cover of the second measurement unit is provided with a second reference plane at the periphery of the elastic membrane, the second measurement unit further comprises a reference cylinder arranged on the lower side of the elastic membrane of the second measurement unit, and the reference cylinder is provided with an upper surface used for being attached to the second reference plane to form a cylinder edge.
6. A pit volume detection method for detecting roadbed compactness by a pit irrigation method is characterized by comprising the following steps: the method comprises the following steps that firstly, a first measuring unit is arranged on the surface of a position, to be dug, of the roadbed to be detected, under the action of liquid on the upper side of an elastic membrane, the elastic membrane is paved on the surface of the roadbed before the hole is dug in the hole area to be dug, and the volume V of the uneven part of the front surface of the hole area to be dug is obtained1Secondly, digging a detection hole in the region to be dug, placing a second measurement unit at the upper end of the detection hole, and fully paving the hole of the detection hole with the elastic membrane under the action of liquid on the upper side of the elastic membraneWall for obtaining volume V between bottom of detection hole and roadbed surface2Volume of detection well V = V2- V1The measuring unit used in the first step is a first measuring unit, the measuring unit used in the second step is a second measuring unit, the elastic membrane of the first measuring unit is a planar membrane structure used for fully paving the roadbed surface before the hole is dug in the hole area to be dug, the elastic membrane of the second measuring unit is a cylindrical membrane structure used for fully paving the inner hole wall of the detection hole, before the first step, the reference plate is abutted against the lower side of the annular pressing plate of the first measuring unit, and at the moment, the liquid level scale V in the liquid level display tube is markednIn the first step, after the elastic film is paved on the roadbed surface before the hole is dug in the hole area to be dug, the liquid level scale V of the liquid level display tubem， V1=Vm-Vn(ii) a Before the second step, the reference cylinder is propped against the lower side of the annular pressure plate of the second measuring unit, the second measuring unit is paved on the inner cavity of the whole reference cylinder, and at the moment, the liquid level scale V in the liquid level display tubeaIn the second step, after the elastic membrane is fully paved on the detection hole, the liquid level scale V in the liquid level display tubec，V2=Vc-（Va-Vb），VbIs the volume of the inner cavity of the reference cylinder.
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| CN204575162U (en) * | 2015-03-19 | 2015-08-19 | 北京汽车研究总院有限公司 | A kind of measurement mechanism of automobile trunk volume |
| CN106510100A (en) * | 2015-09-14 | 2017-03-22 | 欧利速精密工业股份有限公司 | Three-dimensional size measuring system for internal volume of shoe body |
| CN205046538U (en) * | 2015-10-16 | 2016-02-24 | 中铁第五勘察设计院集团有限公司 | Road bed filler compacted density detector |
| CN205353087U (en) * | 2016-01-12 | 2016-06-29 | 李志伟 | Highway compactness test detection device |
| JP2018105772A (en) * | 2016-12-27 | 2018-07-05 | トヨタ自動車株式会社 | Tank testing method |
| CN207780026U (en) * | 2017-12-31 | 2018-08-28 | 申婧 | Highway loaded densification degree detector |
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| CN1366470A (en) * | 2000-03-31 | 2002-08-28 | 埃姆萨股份公司 | Metering device for fluid products |
| DE102009057698A1 (en) * | 2009-12-03 | 2011-06-09 | Martin-Luther-Universität Halle-Wittenberg | Bioreactor for multi-dimensional, mechanical stimulation of cells, cell complexes and/or cell tissue, comprises a first and a second reactor part volumes that are separated from each other through a carrier membrane |
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Effective date of registration: 20221228 Address after: 450000 No. 818, incubation building, No. 1, No. 11, Changchun Road, high tech Zone, Zhengzhou City, Henan Province Patentee after: Henan Dagen metrology and Testing Institute Co.,Ltd. Address before: Room 2403, 24 / F, building 1, 238 Tongbai South Road, Zhongyuan District, Zhengzhou City, Henan Province, 450000 Patentee before: Henan Niupa Institute of Mechanical Engineering |
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