CN204676401U - A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle - Google Patents
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle Download PDFInfo
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- CN204676401U CN204676401U CN201520373445.4U CN201520373445U CN204676401U CN 204676401 U CN204676401 U CN 204676401U CN 201520373445 U CN201520373445 U CN 201520373445U CN 204676401 U CN204676401 U CN 204676401U
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- rear axle
- inspection vehicle
- resilient modulus
- lorry
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Abstract
The utility model relates to a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle.Its twin shaft bus or train route base deflection testing system comprises two rear axle eight and takes turns Cargo Inspection measuring car, backman beam deflection testing instrument; Described backman beam deflection testing instrument has four, and its probe to be placed between left side wheels gap that two rear axle eight takes turns rear axle after lorry, inside left side wheels, between right-hand wheel gap and inside right-hand wheel on four measuring points respectively; Described dial gage has four, is installed on respectively on the analyzing rod of four frame backman beam deflection testing instrument.Compared with prior art, the utility model takes turns lorry as subgrade resilient modulus inspection vehicle using common two rear axles eight, effectively avoids Test Field " standard vehicle " non-type phenomenon; Propose different flexure measuring point to detect simultaneously, inverse subgrade resilient modulus respectively, mutually can prove different measuring points deflection testing result, and overcome due to the unbalanced testing error brought of inspection vehicle left and right sides wheel load, make subgrade resilient deflection testing more rationally, accurately.
Description
Technical field
The utility model belongs to roadbed performance evaluation equipment technical field, specifically, relates to a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle.
Background technology
Subgrade resilient modulus is unique mechanical index characterizing roadbed characteristic in Asphalt Pavement Structure Design, and the Accurate Determining of this index is most important to bituminous pavement design.In existing " highway subgrade road surface on-the-spot test code JTGE60-2008 ", employing loaded plate method (T 0943-2008), backman beam method (T 0944-1995) directly measure subgrade resilient modulus.
In on-the-spot subgrade resilient modulus test, loaded plate method need adopt jack multistage loadings to unload, and its test process is slow, and convenience is poor, therefore the backman beam method that adopts carries out subgrade resilient modulus test more.When backman beam method carries out subgrade resilient modulus test, the inspection vehicle of employing is " standard vehicle " of rear axle 10t standard axle load BZZ-100.But the vehicle output that current China meets " standard vehicle " parameter reduces increasingly, when causing subgrade resilient modulus to be tested, " standard vehicle " non-type phenomenon, directly affects the accuracy that subgrade resilient modulus is measured.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of easy and simple to handle and measure accurately based on the subgrade resilient modulus Analytical system of two rear axle inspection vehicle.
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model, described subgrade resilient modulus Analytical system comprises twin shaft car parameter calibration system and twin shaft bus or train route base deflection testing system; Described twin shaft car parameter calibration system comprises weighbridge 8; Described twin shaft bus or train route base deflection testing system comprises two rear axle eight and takes turns lorry 1 and backman beam deflection testing instrument 2; Described backman beam deflection testing instrument 2 has four, its probe to be placed between left side wheels gap that two rear axle eight takes turns rear axle after lorry 14 respectively, inside left side wheels 5, between right-hand wheel gap 6 and right-hand wheel inside on 7 four measuring points; Described dial gage 3 has four, is installed on respectively on the analyzing rod of four frame backman beam deflection testing instrument 2.
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model, described pair of rear axle eight takes turns rear front axle and the rear axle single-wheel pressure transmission face diameter of equivalent circle 18.15 ± 0.5cm of lorry 1, two rear axle wheelbase 1350mm.
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model, it is 200 ± 1kN that two rear axle axles that the described pair of rear axle eight takes turns lorry 1 carry, and inflation pressure of tire 1.20 ± 0.05MPa, rear front axle and rear axle load difference are less than 2kN.
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model, the Beckman beam length 5.4m of described backman beam deflection testing instrument 2.
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model, between described left side wheels gap, between 4 and right-hand wheel gap, the measuring point at 6 places is all positioned at along direction of traffic forward travel distance 3-5cm place; Inside described left side wheels 5 and right-hand wheel inside the measuring point at 7 places be positioned at distance 3-5cm place, tire inside edge.
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model, described pair of rear axle eight takes turns lorry 1 for Feitian lorry or the two rear axle lorry of Iveco Hongyan.
A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model, described backman beam is made up of albronze, and its forearm and postbrachium are respectively 3.5m and 1.9m.
During work, mensuration person blows a whistle to issue an order and commands inspection vehicle slowly to advance, and the speed that automobile advances is preferably about 5km/h.When dial gage indicator forwards maximum value to, read each dial gage initial reading rapidly, roll away from after the flexure radius of influence until automobile, again read each dial gage end readout.Measuring point between wheel gap, wheel inner side measuring point deflection value is calculated respectively according to each measuring point dial gage reading.
According to E
1=1.322p δ (1-μ
2)/l
between wheel gap, E
2=0.93p δ (1-μ
2)/l
wheel inner side.(in formula, E
1, E
2be respectively subgrade resilient modulus between wheel gap, wheel inner side subgrade resilient modulus, MPa; P is inspection vehicle analysis of wheel vertical load, MPa; L is the rebound deflection value of corresponding measuring point, 0.01mm; μ is roadbed material poisson's ratio; δ is inspection vehicle two circle load single-wheel pressure transmission face equivalent radius of a circle, cm) calculate different flexure measuring point subgrade resilient modulus; According to E=(E
1+ E
2)/2 calculate survey subgrade resilient modulus.
Compared with prior art, the subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model takes turns lorry as subgrade resilient modulus inspection vehicle using common two rear axles eight, effectively avoids Test Field " standard vehicle " non-type phenomenon; Propose different flexure measuring point to detect simultaneously, inverse subgrade resilient modulus respectively, mutually can prove different measuring points deflection testing result, and overcome due to the unbalanced testing error brought of inspection vehicle left and right sides wheel load, make subgrade resilient deflection testing more rationally, accurately.
Accompanying drawing explanation
Fig. 1: based on the subgrade resilient modulus Analytical system schematic diagram of two rear axle inspection vehicle; Fig. 2: two rear axle eight is taken turns Parameters of Freight Cars and demarcated schematic diagram; Fig. 3: point position schematic diagram; Two rear axle eight takes turns that lorry-1, backman beam deflection testing instrument-2, dial gage-3, left side wheels gap are m-4, inside left side wheels-5, inside m-6, the right-hand wheel of right-hand wheel gap-7, weighbridge-8.
Detailed description of the invention
Below in conjunction with specific embodiment, the subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model is described further, but protection domain of the present utility model is not limited to this.
Embodiment 1
Based on a subgrade resilient modulus Analytical system for two rear axle inspection vehicle, it is characterized in that, described subgrade resilient modulus Analytical system comprises twin shaft car parameter calibration system and twin shaft bus or train route base deflection testing system; Described twin shaft car parameter calibration system comprises weighbridge 8; Described twin shaft bus or train route base deflection testing system comprises two rear axle eight and takes turns lorry 1 and backman beam deflection testing instrument 2; Described backman beam deflection testing instrument 2 has four, its probe to be placed between left side wheels gap that two rear axle eight takes turns rear axle after lorry 14 respectively, inside left side wheels 5, between right-hand wheel gap 6 and right-hand wheel inside on 7 four measuring points; Described dial gage 3 has four, is installed on the analyzing rod of four frame backman beam deflection testing instrument 2 respectively; Described pair of rear axle eight takes turns rear front axle and the rear axle single-wheel pressure transmission face diameter of equivalent circle 18.15cm of lorry 1, two rear axle wheelbase 1350mm; Two rear axle axles that the described pair of rear axle eight takes turns lorry 1 carry as 200kN, inflation pressure of tire 1.20MPa, and rear front axle and rear axle load difference are less than 2kN; The Beckman beam length 5.4m of described backman beam deflection testing instrument 2; Between described left side wheels gap, between 4 and right-hand wheel gap, the measuring point at 6 places is all positioned at along direction of traffic forward travel distance 4cm place; Inside described left side wheels 5 and right-hand wheel inside the measuring point at 7 places be positioned at distance 4cm place, tire inside edge; Described pair of rear axle eight takes turns lorry 1 for Feitian lorry or the two rear axle lorry of Iveco Hongyan; Described backman beam is made up of albronze, solid durable, and its forearm and postbrachium are respectively 3.5m and 1.9m, better relative to 3.6m and 1.8m stationarity.
In conjunction with roadbed entity project, subgrade resilient modulus Analytical system described in the utility model is explained: 1) adopt the two rear axle lorry of Iveco Hongyan, and two rear axle lorry is demarcated, ensure that two each inflation pressure of tire of rear axle lorry is 1.20MPa; In two rear axle lorry recessing, add goods, ensure that two rear axle axle carries as 200kN; Adjustment goods relative position, after ensureing, the difference of rear axle and rear front axle load is less than 2kN; 2) respectively the probe of 4 frame 5.4m Benkleman beam deflectometer detectors to be placed between left side wheels gap that two rear axle eight takes turns rear axle after lorry, inside left side wheels, between right-hand wheel gap, inside right-hand wheel on measuring point; 3) 4 dial gages being installed on respectively on the analyzing rod of 4 frame benkelman beams deflectometers, checking that back to zero stablized by dial gage by gently detaining benkelman beams deflectometer; The rebound deflection carrying out the different flexure measuring point of roadbed detects; 4) mensuration person blows a whistle to issue an order and commands automobile slowly to advance, and the speed that automobile advances is preferably about 5km/h.When dial gage indicator forwards maximum value to, the dial gage initial reading in rapid read step 3, rolls away from after the flexure radius of influence until automobile, the dial gage end readout again in read step 3; 5) according to l
between wheel gap=(L
1+ L
2)-(L
1'+L
2'), l
wheel inner side=(L
3+ L
4)-(L
3'+L
4') calculate between wheel gap that two rear axle eight takes turns lorry, wheel inner side rebound deflection; 6) according to E
1=1.322p δ (1-μ
2)/l
between wheel gap, E
2=0.93p δ (1-μ
2)/l
wheel inner sidecalculate different flexure measuring point subgrade resilient modulus; 7) according to E=(E
1+ E
2)/2 calculate survey subgrade resilient modulus.Measured result is as table 1.
The result of the test of table 1 different filler roadbed under different modulus of resilience method of testing
Table 1 is known, and the utility model is based on the subgrade resilient modulus test macro of two rear axle inspection vehicle, and its subgrade resilient modulus testing result and method for normalizing BZZ-100 standard vehicle testing result, loaded plate method testing result are consistent.Compared with prior art, the subgrade resilient modulus Analytical system based on two rear axle inspection vehicle described in the utility model takes turns lorry as subgrade resilient modulus inspection vehicle using common two rear axles eight, effectively avoids Test Field " standard vehicle " non-type phenomenon; Propose different flexure measuring point to detect simultaneously, inverse subgrade resilient modulus respectively, mutually can prove different measuring points deflection testing result, and overcome due to the unbalanced testing error brought of inspection vehicle left and right sides wheel load, make subgrade resilient deflection testing more rationally, accurately.
Claims (7)
1. based on a subgrade resilient modulus Analytical system for two rear axle inspection vehicle, it is characterized in that, described subgrade resilient modulus Analytical system comprises twin shaft car parameter calibration system and twin shaft bus or train route base deflection testing system; Described twin shaft car parameter calibration system comprises weighbridge (8); Described twin shaft bus or train route base deflection testing system comprises two rear axle eight and takes turns lorry (1) and backman beam deflection testing instrument (2); Described backman beam deflection testing instrument (2) has four, and its probe to be placed between left side wheels gap that two rear axle eight takes turns lorry (1) rear axle inside (4), left side wheels between (5), right-hand wheel gap inside (6) and right-hand wheel on (7) four measuring points respectively; Described dial gage (3) has four, is installed on respectively on the analyzing rod of four frame backman beam deflection testing instrument (2).
2. a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle according to claim 1, it is characterized in that, described pair of rear axle eight takes turns rear front axle and the rear axle single-wheel pressure transmission face diameter of equivalent circle 18.15 ± 0.5cm of lorry (1), two rear axle wheelbase 1350mm.
3. a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle according to claim 1, it is characterized in that, it is 200 ± 1kN that two rear axle axles that the described pair of rear axle eight takes turns lorry (1) carry, inflation pressure of tire 1.20 ± 0.05MPa, rear front axle and rear axle load difference are less than 2kN.
4. a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle according to claim 1, is characterized in that, the Beckman beam length 5.4m of described backman beam deflection testing instrument (2).
5. a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle according to claim 1, it is characterized in that, between described left side wheels gap, between (4) and right-hand wheel gap, the measuring point at (6) place is all positioned at along direction of traffic forward travel distance 3-5cm place; Inside described left side wheels, inside (5) and right-hand wheel, the measuring point at (7) place is positioned at distance 3-5cm place, tire inside edge.
6. a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle according to claim 1, is characterized in that, described pair of rear axle eight takes turns lorry (1) for Feitian lorry or the two rear axle lorry of Iveco Hongyan.
7. a kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle according to claim 4, it is characterized in that, described backman beam is made up of albronze, and its forearm and postbrachium are respectively 3.5m and 1.9m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520373445.4U CN204676401U (en) | 2015-06-02 | 2015-06-02 | A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle |
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| CN201520373445.4U CN204676401U (en) | 2015-06-02 | 2015-06-02 | A kind of subgrade resilient modulus Analytical system based on two rear axle inspection vehicle |
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| CN204676401U true CN204676401U (en) | 2015-09-30 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368203A (en) * | 2016-11-02 | 2017-02-01 | 山西省交通科学研究院 | Method for detecting deflection of Benkelman beam of roadbed based on double-rear-axle heavy duty truck |
| CN106522189A (en) * | 2016-11-02 | 2017-03-22 | 山西省交通科学研究院 | Roadbed Beckman beam deflection detecting method based on wheel inner side measuring point |
| CN107217577A (en) * | 2017-07-10 | 2017-09-29 | 长安大学 | The continuous automatic backman beam mechanism of vehicular |
| CN111254787A (en) * | 2020-02-13 | 2020-06-09 | 长沙理工大学 | Roadbed pavement dynamic and static deflection and resilience modulus combined testing device and testing method |
| CN111474029A (en) * | 2020-05-19 | 2020-07-31 | 中南林业科技大学 | Roadbed gravel soil dynamic resilience modulus estimation method |
| CN114753219A (en) * | 2022-04-08 | 2022-07-15 | 广州市市政工程设计研究总院有限公司 | Road springback and deflection detection device based on Beckman beam method and use method |
-
2015
- 2015-06-02 CN CN201520373445.4U patent/CN204676401U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368203A (en) * | 2016-11-02 | 2017-02-01 | 山西省交通科学研究院 | Method for detecting deflection of Benkelman beam of roadbed based on double-rear-axle heavy duty truck |
| CN106522189A (en) * | 2016-11-02 | 2017-03-22 | 山西省交通科学研究院 | Roadbed Beckman beam deflection detecting method based on wheel inner side measuring point |
| CN107217577A (en) * | 2017-07-10 | 2017-09-29 | 长安大学 | The continuous automatic backman beam mechanism of vehicular |
| CN107217577B (en) * | 2017-07-10 | 2019-07-16 | 长安大学 | The continuous automatic backman beam mechanism of vehicular |
| CN111254787A (en) * | 2020-02-13 | 2020-06-09 | 长沙理工大学 | Roadbed pavement dynamic and static deflection and resilience modulus combined testing device and testing method |
| CN111254787B (en) * | 2020-02-13 | 2021-09-14 | 长沙理工大学 | Roadbed pavement dynamic and static deflection and resilience modulus combined testing device and testing method |
| CN111474029A (en) * | 2020-05-19 | 2020-07-31 | 中南林业科技大学 | Roadbed gravel soil dynamic resilience modulus estimation method |
| CN111474029B (en) * | 2020-05-19 | 2022-06-14 | 重庆交通大学 | Roadbed gravel soil dynamic resilience modulus estimation method |
| CN114753219A (en) * | 2022-04-08 | 2022-07-15 | 广州市市政工程设计研究总院有限公司 | Road springback and deflection detection device based on Beckman beam method and use method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20190602 |
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| CF01 | Termination of patent right due to non-payment of annual fee |