CN110749262A - Pit digging volume detection device and detection method for detecting roadbed compactness by pit digging method - Google Patents
Pit digging volume detection device and detection method for detecting roadbed compactness by pit digging method Download PDFInfo
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- CN110749262A CN110749262A CN201911250431.2A CN201911250431A CN110749262A CN 110749262 A CN110749262 A CN 110749262A CN 201911250431 A CN201911250431 A CN 201911250431A CN 110749262 A CN110749262 A CN 110749262A
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- 238000001514 detection method Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 34
- 238000009412 basement excavation Methods 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 11
- 238000005056 compaction Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035929 gnawing Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0021—Measuring arrangements characterised by the use of mechanical techniques for measuring the volumetric dimension of an object
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N2009/022—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of solids
- G01N2009/024—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of solids the volume being determined directly, e.g. by size of container
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a digging volume detection device and a detection method for detecting roadbed compactedness by a digging method, wherein the digging volume detection device comprises a piston cylinder, a piston is movably assembled in the piston cylinder in a guiding way, one side of the piston is connected with a piston push rod, the other end of the piston is provided with a solid flexible body which is pushed by the piston to move so as to fill a corresponding road surface to be dug or a detection hole, the solid flexible body is of a cylindrical structure with the outer diameter being the same as the inner diameter of the piston cylinder, and the digging volume detection device further comprises a stroke detection structure for measuring the moving stroke of the piston. The invention solves the technical problem of high working strength caused by the fact that sand needs to be recovered when pit digging volume detection is carried out through sand filling in the prior art.
Description
Technical Field
The invention relates to a pit volume detection device and a pit volume detection method for detecting the roadbed compactness by a pit digging method in the field of roadbed compactness detection.
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 volume detection device for detecting the compaction degree of a roadbed by a pit digging method, which aims to solve the technical problem of high working strength caused by the fact that sand needs to be recovered when pit digging volume detection is carried out by sand filling in the prior art; 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 pit volume detection device for detecting the roadbed compactness by the pit digging method is as follows:
the excavation volume detection device for detecting the compaction degree of the roadbed by the excavation method comprises a piston cylinder, a piston is assembled in the piston cylinder in a guiding and moving mode, a piston push rod is connected to one side of the piston, the other end of the piston is provided with a solid flexible body which is used for being pushed and moved by the piston to fill a corresponding road surface to be excavated or a detection hole, the solid flexible body is of a cylinder structure with the outer diameter being the same as the inner diameter of the piston cylinder, and the excavation volume detection device further comprises a stroke detection structure used for measuring the moving stroke of the piston.
The stroke detection structure is a pull rope displacement sensor arranged on the piston cylinder, a pull rope of the pull rope displacement sensor is connected with the piston, and the extension direction of the pull rope is consistent with the moving direction of the piston.
One end of the piston push rod, which is far away from the piston, extends out of the piston cylinder, and the extending end of the piston push rod is provided with a handle for an operator to hold the piston.
One end of the solid flexible body, which is adjacent to the piston, is fixed on the piston.
The solid flexible body is made of rubber or silica gel.
One end of the piston cylinder, which is far away from the piston push rod, is of a conical flaring structure.
The technical scheme of the pit volume detection method for detecting the roadbed compactness by the pit digging method comprises the following steps:
the method comprises the following steps that firstly, a pit digging volume detection device is arranged on the surface of a position to be dug of a roadbed to be detected, a piston is pushed through a piston push rod, under the action force of the piston, a solid flexible body fills the roadbed surface in front of a hole digging area to be dug, and the extending volume V of the solid flexible body is obtained through the moving stroke of the piston and the sectional area of a piston cylinder1Secondly, digging a detection hole in the region to be dug, arranging a digging volume detection device at the upper end of the detection hole, pushing a piston through a piston push rod, fully paving an elastic membrane on the hole wall of the detection hole, and obtaining the extension volume V of the solid flexible body through the moving stroke of the piston and the sectional area of the piston2Volume of detection well V = V2- V1。
The invention has the beneficial effects that: according to the invention, aiming at uneven road surfaces, in the first step, a pit volume detection device is arranged on the surface of a position to be dug of a roadbed to be detected, a piston is pushed by a piston push rod, a solid flexible body fills the roadbed surface before the hole is dug in a hole area to be dug under the action of the piston, and the extending volume V of the solid flexible body is obtained through the moving stroke of the piston and the sectional area of a piston cylinder1Secondly, digging a detection hole in the region to be dug, placing the pit digging volume detection device at the upper end of the detection hole, and pushing the detection hole by a piston push rodThe piston, the elastic membrane is fully paved on the hole wall of the detection hole, and the extending volume V of the solid flexible body is obtained through the moving stroke of the piston and the sectional area of the piston2Volume of detection well V = V2- V1. Therefore, the device can be suitable for detecting the volume of the dug pit on the uneven road surface, and after the device is used, the surface of the solid flexible body is cleaned again, so that the problem that sand needs to be recovered in the later period does not exist, and the labor intensity of operators is reduced.
Drawings
FIG. 1 is a schematic view showing the construction of an embodiment of a pit volume detecting apparatus for detecting the degree of compaction of a roadbed by a pit excavation method according to the present invention;
FIG. 2 is a schematic view showing a state in which the excavation volume detection apparatus of the present invention detects a roadbed before excavation;
FIG. 3 is a schematic diagram of the pit volume detecting device according to the present invention, showing a solid flexible body filled in the entire detecting hole.
Detailed Description
The embodiment of the device for detecting the volume of the dug pit on the road surface by the digging method is shown in figures 1-3: including the piston barrel 1 that the inner chamber is cylindrical structure, the top of piston barrel 1 is provided with bobbin top 2, and the direction removes and is equipped with piston 8 in the piston barrel 1, and the upper end of piston is connected with piston push rod 3, and piston push rod 3's upper end by the piston barrel stretches out, and piston push rod's the end that stretches out is provided with the handle 4 that supplies the handheld operation of operating personnel.
The lower end of the piston is fixed with a solid flexible body 9 which is pushed by the piston to move to fill a corresponding road surface 11 to be dug or a detection hole 13 through an adhesive structure, the solid flexible body 9 is of a cylindrical structure with the outer diameter being the same as the inner diameter of the piston cylinder 1, and the solid flexible body 9 is made of silica gel (or rubber) with unchanged density after being pressed. The hole digging volume detection device further comprises a stroke detection structure for measuring the moving stroke of the piston, in the embodiment, an annular baffle 9 is arranged in the piston cylinder, and the annular baffle is used for being matched with the piston stop to limit the upward moving limit of the piston 8, so that a reference starting point is provided for each piston moving, and meanwhile, the stay cord displacement sensor 5 is protected. The stroke detection structure is a pull rope displacement sensor arranged between the cylinder top and the annular baffle, a pull rope 6 of the pull rope displacement sensor is connected with a piston 8, and the extension direction of the pull rope 6 is consistent with the moving direction of the piston. One end of the piston cylinder, which is far away from the piston push rod, is a conical flaring structure 10, and the conical flaring structure 10 can avoid the phenomenon of edge gnawing when a solid flexible body is deformed and filled.
In this embodiment, when the piston 8 is stopped by the annular baffle 7, the piston stroke is recorded as stroke zero, and the volume between the bottom of the solid flexible body and the bottom of the conical flaring structure is recorded as V3，V3For a known value, in actual use, since the roadbed surface, i.e. the road surface 11 to be excavated, is often uneven, as shown in fig. 2, before excavation, a pit volume detecting device is first placed on the roadbed to be excavated, and the solid flexible body 9 is made to cover the entire position to be excavated by pushing the piston 8 downward, at which time the piston 8 moves by a stroke L1According to the sectional area S of the inner cavity of the piston cylinder, the extension volume V of the solid flexible body at the moment can be calculated1，V1=SL1The volume V of the uneven part of the front surface of the hole in the area to be drilled4= V1- V3. Then, the pit volume detection device is moved away, a hole is dug at the position to be dug on the roadbed 12, the detection hole 13 with a cylindrical structure is dug, and the wall of the detection hole 13 inevitably has a bulge and/or a groove 14, as shown in figure 3, the pit volume detection device is arranged at the upper end of the detection hole, the piston is pushed downwards after returning to the zero point forming position, the solid flexible body fills the whole detection hole, and the piston moves to form an L shape2According to the sectional area of the inner cavity of the piston cylinder, the extension volume V of the solid flexible body at the moment can be calculated2，V1=SL2The volume of the detection well is V = V2-V3- V4= V2- V1。
In other embodiments of the invention: the piston push rod can also not be pushed by manpower, for example, the piston push rod is forced by an electric, pneumatic or hydraulic mode; the stroke detection structure for measuring the piston displacement can also be in other forms, for example, a laser displacement sensor is used, or the piston cylinder is made of transparent materials, and scales are arranged on the outer side of the piston cylinder, so that the stroke displacement of the piston is obtained; the annular baffle plate is not required to be arranged, so long as the starting positions of the piston movement in the first step and the second step are the same.
The embodiment of the excavation volume detection method for detecting the roadbed compactness by the excavation method comprises the following steps: the method comprises the following steps that firstly, a pit volume detection device is arranged on the surface of a position to be dug of a roadbed to be detected, the specific structure of the pit volume detection device is the same as that of each pit volume detection device, the detailed description is omitted, a piston is pushed by a piston push rod, a solid flexible body fills the roadbed surface in front of the pit of a region to be dug under the action of the piston, and the extending volume V of the solid flexible body is obtained through the moving stroke of the piston and the sectional area of a piston cylinder1Secondly, digging a detection hole in the region to be dug, arranging a digging volume detection device at the upper end of the detection hole, pushing a piston through a piston push rod, fully paving an elastic membrane on the hole wall of the detection hole, and obtaining the extension volume V of the solid flexible body through the moving stroke of the piston and the sectional area of the piston2Volume of detection well V = V2- V1。
Claims (7)
1. Excavation method road bed compactness detects with volume detection device that excavates pit, its characterized in that: the device comprises a piston cylinder, a piston is assembled in the piston cylinder in a guiding and moving mode, a piston push rod is connected to one side of the piston, a solid flexible body used for being pushed and moved by the piston to fill a corresponding road surface to be drilled or a corresponding detection hole is arranged at the other end of the piston, the solid flexible body is of a cylindrical structure, the outer diameter of the solid flexible body is the same as the inner diameter of the piston cylinder, and the hole drilling volume detection device further comprises a stroke detection structure used for measuring the moving stroke of the piston.
2. The excavation volume detection apparatus according to claim 1, wherein: the stroke detection structure is a pull rope displacement sensor arranged on the piston cylinder, a pull rope of the pull rope displacement sensor is connected with the piston, and the extension direction of the pull rope is consistent with the moving direction of the piston.
3. The excavation volume detection apparatus according to claim 1, wherein: one end of the piston push rod, which is far away from the piston, extends out of the piston cylinder, and the extending end of the piston push rod is provided with a handle for an operator to hold the piston.
4. The excavation volume detection apparatus according to claim 1, wherein: one end of the solid flexible body, which is adjacent to the piston, is fixed on the piston.
5. The excavation volume detection apparatus according to claim 1, wherein: the solid flexible body is made of rubber or silica gel.
6. The excavation volume detection apparatus according to any one of claims 1 to 4, wherein: one end of the piston cylinder, which is far away from the piston push rod, is of a conical flaring structure.
7. The method for detecting the volume of the excavation pit for detecting the roadbed compactness by the excavation pit method is characterized by comprising the following steps of: the method comprises the following steps that firstly, a pit digging volume detection device is arranged on the surface of a position to be dug of a roadbed to be detected, a piston is pushed through a piston push rod, under the action force of the piston, a solid flexible body fills the roadbed surface in front of a hole digging area to be dug, and the extending volume V of the solid flexible body is obtained through the moving stroke of the piston and the sectional area of a piston cylinder1Secondly, digging a detection hole in the region to be dug, arranging a digging volume detection device at the upper end of the detection hole, pushing a piston through a piston push rod, fully paving an elastic membrane on the hole wall of the detection hole, and obtaining the extension volume V of the solid flexible body through the moving stroke of the piston and the sectional area of the piston2Volume of detection well V = V2- V1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250431.2A CN110749262A (en) | 2019-12-09 | 2019-12-09 | Pit digging volume detection device and detection method for detecting roadbed compactness by pit digging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250431.2A CN110749262A (en) | 2019-12-09 | 2019-12-09 | Pit digging volume detection device and detection method for detecting roadbed compactness by pit digging method |
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| CN110749262A true CN110749262A (en) | 2020-02-04 |
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| CN201911250431.2A Pending CN110749262A (en) | 2019-12-09 | 2019-12-09 | Pit digging volume detection device and detection method for detecting roadbed compactness by pit digging method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610645A (en) * | 2020-12-28 | 2021-04-06 | 浙江聚力智能机械设备有限公司 | High-precision mechanical spring resisting deformation in non-working direction |
| CN112945615A (en) * | 2021-01-30 | 2021-06-11 | 北京城建七建设工程有限公司 | Measuring device for road pavement structural layer compactness |
| CN113638393A (en) * | 2020-05-28 | 2021-11-12 | 山东交通职业学院 | Hole digging and repairing device for detecting roadbed solidity by sand filling method |
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| CN112945615A (en) * | 2021-01-30 | 2021-06-11 | 北京城建七建设工程有限公司 | Measuring device for road pavement structural layer compactness |
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