CN202631387U - Rockfill rolling density radar measuring device - Google Patents
Rockfill rolling density radar measuring device Download PDFInfo
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- CN202631387U CN202631387U CN 201220291259 CN201220291259U CN202631387U CN 202631387 U CN202631387 U CN 202631387U CN 201220291259 CN201220291259 CN 201220291259 CN 201220291259 U CN201220291259 U CN 201220291259U CN 202631387 U CN202631387 U CN 202631387U
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- Prior art keywords
- rockfill
- radar
- additional aluminum
- rolling
- density
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Abstract
The utility model discloses a rockfill rolling density radar measuring device, which adopts an additional aluminum-steel reflection body, measuring points are distributed on the bottom surface of a rockfill rolling layer before the detection, the additional aluminum-steel reflection body is installed, and a coordinate altitude of the additional aluminum-steel reflection body is measured; after the rockfill rolling layer is paved, the cross wide-angle radar test is conducted right above the additional aluminum-steel reflection body; and the radar reflection wave is processed by a computer to obtain detection parameter values such as travel time, wave amplitude, thickness of the rolling layer and the like, and the density value of the rolling layer of the rockfill on the measuring point can be calculated after contrastively analyzing the detection parameter values. The device is convenient to use, high in precision and low in cost.
Description
Technical field
The utility model relates to a kind of engineering construction physics exploration pick-up unit, and particularly a kind of rockfill rolls density radar measuring device, belongs to field of engineering building.
Background technology
In water conservancy and hydropower dam body, roadbed and artificial sitework, roll rockfill more and more widely as the use of filling material.Rockfill is a kind of strong frictional property set material of certain grating, no compendency, perviousness that has.Rockfill only reaches very high packing, just can reach the intensity of expection and draw high adaptability to changes, and packing is very significant to rolling the rockfill Effect on Performance, is one of major control index of construction quality.Rolling both at home and abroad at present in the rockfill construction, to the measurement and the control of grinding compacting degree, is to realize through measurement and control to rolling layers density (unit weight).Therefore, fill quality,, need roll density to rockfill and carry out original position and detect in real time according to the related specifications requirement for guaranteeing construction.
The method that traditional rockfill rolls Density Detection mainly is the manual work method of digging pit, and promptly digs pit at measuring point, and weighs up the quality of digging out body, measures the volume of being digged pit with the way of pouring water (shop Polypropylence Sheet) or irritate sand simultaneously, thereby obtains the density of this measuring point.More for a long time, the method for digging pit detects if each measuring point all adopts manual work at measuring point, can destroy the structure (need carry out backfill weight to the hole of excavation after measuring completion) of rockfill on a large scale, and workload can be very big.
Therefore, to roll the technical scheme of density measurement be unfavorable for above-mentioned rockfill.
The utility model content
The utility model technical matters to be solved provides and a kind ofly only needs indivedual measuring points to destroy the rockfill structures can accurately to obtain the additional aluminum steel reflecting body radar measuring device that rockfill rolls density fast, to overcome the deficiency of prior art scheme.
For realizing the purpose of the utility model; A kind of rockfill of the utility model rolls density radar measuring device; Comprise rockfill, wherein, be provided with the aluminium alloy that diameter is 1～10cm or the additional aluminum steel reflecting body of the thin body structure of ferroalloy in rockfill rolling layers bottom surface; On the rockfill rolling layers directly over the additional aluminum steel reflecting body, be provided with radar antenna, be connected through cable between radar antenna and the GPR.
Further, above-mentioned rockfill rolls density radar measuring device, and wherein, said GPR cross wide is 1～2 times of rockfill rolling layers thickness h.
When adopting technique scheme; Because it is a kind of nondestructive geophysical probing technique that GPR detects; The various work-yards condition of the engineering site that can be used for safely building, adaptability and diamagnetic interference are strong, have satisfied investigation depth and resolution.
Because of the rockfill that has adopted this additional aluminum steel reflecting body rolls density radar measuring device; When the mensuration rockfill rolls density; Electromagnetic wave waveform principle different in the rockfill medium of different densities according to same wavelength with the energy attenuation situation; Electromagnetic input parameter through to radar emission and reception is analyzed contrast, just can extrapolate the density that rolls of measuring point rockfill more exactly.Because GPR control operation automatically, scene only need 1～2 people to get final product work.The manual work assay methods such as method of digging pit are compared in evidence, and only the needing destroy indivedual measuring point rockfill structures of the utility model can be obtained desirable mensuration result; And workload is little; High efficiency, comprehensive use cost is low, can be used for the testing of heavy construction multi-measuring point.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Being labeled as in the accompanying drawing: the 1-GPR, the 2-radar antenna, the 3-cable, 4-adds aluminum steel reflecting body, 5-rockfill.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
See Fig. 1; On rockfill 5 rolling layers bottom surface measuring points, settle additional aluminum steel reflecting body 4 among the figure in advance; On rockfill 5 rolling layers directly over the additional aluminum steel reflecting body 4, radar antenna 2 is arranged; Radar antenna 2 links to each other with GPR 1 through cable 3, and radar antenna 2 can move the position that is fit to confirm on the rockfill rolling layers.
During detection; Through the additional aluminum steel reflecting body 4 transmitting radar waves signals of radar antenna 2 to rockfill 5 rolling layers bottom surfaces; Radar wave signal is propagated downwards and by additional aluminum steel reflecting body 4 reflected back ground, and after radar antenna 2 received the radar wave signal that additional aluminum steel reflecting body reflects, GPR 1 was promptly write down each road waveform data with the form of numeral; After GPR 1 data recorded input computing machine handled, obtain the electromagnetic wave initial amplitude value A of radar emission
0, parameter values for detection such as t during the walking of the echo amplitude value A that accepts of radar, radar return.Measure and measure the rolling layers thickness h.
Electromagnetic wave initial amplitude value A with rockfill rolling layers thickness h, radar emission
0, t substitution formula during the walking of the echo amplitude value A that accepts of radar, radar return:
Draw the density value ρ of rockfill rolling layers;
In the following formula, ρ is the density (g/cm of test point
3), A
0Be the electromagnetic wave initial amplitude value of radar emission, A is the echo amplitude value that radar is accepted, and t is a radar return when walking (ns), and h is a rockfill rolling layers thickness (m), and n is the calibration parameter.
Provide definite method of calibration parameter n below.
Select three measuring points (also can get more a plurality of measuring points) on the rockfill 5 same rolling layers, carry out the radar test of above-mentioned additional aluminum steel reflecting body 4 respectively, draw the electromagnetic wave initial amplitude value A of three measuring point radar emission at three measuring points according to the engineering actual conditions
01, A
02, A
03The echo amplitude value A that radar is accepted
1, A
2, A
3T during the walking of radar return
1, t
2, t
3Etc. parameter values for detection, and measure the thickness h of rockfill 5 rolling layers
1, h
2, h
3
Adopt the artificial method of digging pit to measure the density p of measuring point rockfill 5 rolling layers
1, ρ
2, ρ
3Specific practice is following: dig pit respectively at three measuring points, and weigh up the mass M of digging out body
1, M
2, M
3, measure the volume V that is digged pit with the way of shop Polypropylence Sheet filling sand simultaneously
1, V
2, V
3,, obtain the density p of three measuring points respectively according to formula ρ=M/V
1, ρ
2, ρ
3
The parameter values for detection A of three measuring points that above-mentioned steps is obtained
0, A, t and rolling layers thickness h and rockfill roll the following formula of density p substitution, obtains the calibration parameter n of three measuring points respectively
1, n
2, n
3
In the following formula, ρ is the density (g/cm of test point
3), A
0Be the electromagnetic wave initial amplitude value of radar emission, A is the echo amplitude value that radar is accepted, and t is a radar return when walking (ns), and h is a rockfill rolling layers thickness (m).
The calibration parameter n of three mensuration obtaining according to above-mentioned steps
1, n
2, n
3, get the calibration parameter n of the arithmetic mean of three calibration parameters as this layer rockfill 5 rolling layers.
In practical application, calibration parameter n can be through more the multi-measuring point repeated calculation be definite, and calibration parameter n calculates the measuring point number of choosing and confirms in total measuring point number according to certain number percent, is advisable with 5%～15%.
Be a concrete exemplary applications of the utility model more than, the utility model also has other embodiment, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the desired protection domain of the utility model.
Claims (2)
1. a rockfill rolls density radar measuring device; Comprise rockfill (5); It is characterized in that: the additional aluminum steel reflecting body (4) that is provided with the thin body structure of aluminium alloy that diameter is 1～10cm or ferroalloy in rockfill (5) rolling layers bottom surface; On rockfill (5) rolling layers directly over the additional aluminum steel reflecting body (4), be provided with radar antenna (2), be connected through cable (3) between radar antenna (2) and the GPR (1).
2. rockfill according to claim 1 rolls density radar measuring device, it is characterized in that: said GPR (1) cross wide is 1～2 times of rockfill (5) rolling layers thickness h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291259 CN202631387U (en) | 2012-06-20 | 2012-06-20 | Rockfill rolling density radar measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291259 CN202631387U (en) | 2012-06-20 | 2012-06-20 | Rockfill rolling density radar measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631387U true CN202631387U (en) | 2012-12-26 |
Family
ID=47384578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220291259 Expired - Lifetime CN202631387U (en) | 2012-06-20 | 2012-06-20 | Rockfill rolling density radar measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202631387U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759491A (en) * | 2012-06-20 | 2012-10-31 | 中国水电顾问集团贵阳勘测设计研究院 | Rockfill compaction density measurement method and device |
| CN104236488A (en) * | 2014-09-28 | 2014-12-24 | 青岛厚科信息工程有限公司 | Mark belt real-time depth-measuring system based on radar detection technology |
-
2012
- 2012-06-20 CN CN 201220291259 patent/CN202631387U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759491A (en) * | 2012-06-20 | 2012-10-31 | 中国水电顾问集团贵阳勘测设计研究院 | Rockfill compaction density measurement method and device |
| CN102759491B (en) * | 2012-06-20 | 2014-06-18 | 中国水电顾问集团贵阳勘测设计研究院 | Rockfill compaction density measurement method and device |
| CN104236488A (en) * | 2014-09-28 | 2014-12-24 | 青岛厚科信息工程有限公司 | Mark belt real-time depth-measuring system based on radar detection technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA POWER GROUP GUIYANG INVESTIGATION DESIGN + R Free format text: FORMER NAME: HYDROCHINA GUIYANG ENGINEERING CORPORATION, LTD. Owner name: HYDROCHINA GUIYANG ENGINEERING CORPORATION, LTD. Free format text: FORMER NAME: GUIYANG PROSPECTION + DESIGN INST, CHINA HYDRAULIC POWER CONSULTARY GROUP |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 550081 No. 16 Xing Qian Road, Jinyang New District, Guizhou, Guiyang Patentee after: POWERCHINA GUIYANG ENGINEERING Corp.,Ltd. Address before: 550081 No. 16 Xing Qian Road, Jinyang New District, Guizhou, Guiyang Patentee before: HydroChina Guiyang Engineering Corp. Address after: 550081 No. 16 Xing Qian Road, Jinyang New District, Guizhou, Guiyang Patentee after: CHINA POWER CONSRTUCTION GROUP GUIYANG SURVEY AND DESIGN INSTITUTE Co.,Ltd. Address before: 550081 No. 16 Xing Qian Road, Jinyang New District, Guizhou, Guiyang Patentee before: POWERCHINA GUIYANG ENGINEERING Corp.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |