CN2718515Y - Railway bed surface true displacement test peg - Google Patents
Railway bed surface true displacement test peg Download PDFInfo
- Publication number
- CN2718515Y CN2718515Y CN 200420016443 CN200420016443U CN2718515Y CN 2718515 Y CN2718515 Y CN 2718515Y CN 200420016443 CN200420016443 CN 200420016443 CN 200420016443 U CN200420016443 U CN 200420016443U CN 2718515 Y CN2718515 Y CN 2718515Y
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- bed surface
- railway bed
- peg
- railway
- fixed reference
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Abstract
The utility model discloses a railway bed surface true displacement test peg, comprising a fixed datum peg, an outer protected pipe, and a resistor strain type displacement meter. The fixed datum peg is a steel pipe, inserted into the vertical hole of the railway bed; the periphery of the lower part of the fixed datum peg is poured with concretes, and the upper end of the fixed datum peg is exposed out of the railway bed surface; the outer protected pipe is sheathed outside the fixed datum peg, a gap is between the lower end and the concretes, the upper end and the railway bed surface are on the same level, and the outer protected pipe is tightly abutted with the vertical hole of the railway bed surface together; the resistor strain type displacement meter is fixed on the upper end of the fixed datum peg through an angle-bar bracket, the contact of the resistor strain displacement meter is directly contacted with the railway bed surface, and the contact surface is provided with a smooth flat plate. The utility model has the advantage that the railway bed surface true displacement test peg can continuously and accurately test the actual displacement of the railway bed surface, and the precision can achieve 0. 01mm, providing important parameter for researching the hardness of the railway bed surface, the elastic modulus, and the filling quality; the stability and the durability of the railway bed surface are ensured; accordingly, the safety of the railway transportation is ensured.
Description
Technical field
The utility model relates to the true displacement measurement stake of a kind of railway subgrade surface, is mainly used under the effect of train dynamic load, and the test of railway subgrade surface displacement comprises that moving displacement and off-position move.
Background technology
At present, owing to be difficult to overcome the difficulty of stationary support point, the real displacement that can't test road bed.The researcher have to be placed on " accelerometer " on the road bed, can test the relative displacement of road bed.The shortcoming of the displacement of use accelerometer test road bed is as follows: (1) can't test the real displacement of road bed, can only test relative displacement.(2) off-position that can't test road bed moves, and can only test moving displacement.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of true displacement measurement stake of railway subgrade surface that can test the road bed real displacement continuously, exactly.
The technical scheme that its technical matters that solves the utility model adopts:
The utility model is made up of fixed reference stake, outer pillar, resistance-strain type displacement meter, the fixed reference stake is a steel pipe, the fixed reference stake is inserted in the vertical hole of roadbed, is cast with concrete around the bottom of fixed reference stake, the upper end of fixed reference stake expose roadbed and; Outer protective pipe sleeve is outside the fixed reference stake, and its lower end and concrete leave the gap, and its upper end is concordant with road bed, and the vertical hole of outer pillar and roadbed is together closely connected; The resistance-strain type displacement meter is fixed on fixed reference stake top by the angle steel bracket, and the contact of resistance-strain type displacement meter contacts with road bed is vertical, is provided with smooth plates at surface of contact.
The beneficial effects of the utility model are real displacement that it can test road bed continuously, exactly, precision can reach 0.01mm, for rigidity, the elastic modulus of research railway subgrade surface, fill quality important parameter be provided, guarantee the stability and the permanance of railway bed, thereby guarantee safety of railway transportation.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 utilizes the utility model to the test curve figure of rapid through out-of-date road bed displacement.
In Fig. 1,1, the resistance-strain type displacement meter, 2, the angle steel bracket, 3, outer pillar, 4, the fixed reference stake, 5, concrete, 6, roadbed.
Embodiment
By embodiment shown in Figure 1 as can be known, it is made up of fixed reference stake 4, outer pillar 3, resistance-strain type displacement meter 1, fixed reference stake 4 is a steel pipe, fixed reference stake 4 is inserted in the vertical hole of roadbed 6, be cast with concrete 5 around the bottom of fixed reference stake 4, road bed is exposed in the upper end of fixed reference stake 4; Outer pillar 3 is enclosed within outside the fixed reference stake 4, and its lower end and concrete 5 leave the gap, and its upper end is concordant with road bed, and outer pillar 3 is together closely connected with the vertical hole of roadbed; Resistance-strain type displacement meter 1 is fixed on fixed reference stake 4 tops by angle steel bracket 2, and the contact of resistance-strain type displacement meter 1 contacts with road bed is vertical, is provided with smooth plates at surface of contact, and described smooth plates is a glass plate.
The model of resistance-strain type displacement meter is WD310.
Utilize the resistance-strain type displacement meter directly to test the road bed displacement and can reach very high precision, yet its design and installation technology is very complicated.The resistance-strain type displacement meter is fixed on fixed reference stake top (see figure 1), and this detective pole should satisfy the influence that not impacted by train, reaches static substantially requirement, reduces difficulty of construction again as far as possible.Therefore,, on this basis, reduce the buried depth of detective pole as far as possible, reduce difficulty of construction according to the natural frequency of vibration of detective pole size greater than the principle design test stake of the excellent frequency of roadbed.Test and FEM (finite element) calculation show that the excellent frequency of roadbed is not more than 10Hz; And this detective pole natural frequency of vibration reaches 27.4Hz, meets the demands fully.On-the-spot test also proving effect is fine.
The resistance-strain type displacement meter is by civil construction institute of Tsing-Hua University Laboratory Production.Model is WD310, range 10mm, precision 1/100mm.
This device adopts in the extensive site test of Qinhuangdao Shenyang Special Passenger Line first.Reached Expected Results.Rapid is seen Fig. 2 through the test curve of out-of-date road bed displacement.
Claims (3)
1, the true displacement measurement stake of a kind of railway subgrade surface, it is characterized in that it is made up of fixed reference stake (4), outer pillar (3), resistance-strain type displacement meter (1), fixed reference stake (4) is a steel pipe, fixed reference stake (4) is inserted in the vertical hole of roadbed (6), be cast with concrete (5) around the bottom of fixed reference stake (4), road bed is exposed in the upper end of fixed reference stake (4); Outer pillar (3) is enclosed within outside the fixed reference stake (4), and its lower end and concrete (5) leave the gap, and its upper end is concordant with road bed, and outer pillar (3) is together closely connected with the vertical hole of roadbed; Resistance-strain type displacement meter (1) is fixed on fixed reference stake (4) top by angle steel bracket (2), and the contact of resistance-strain type displacement meter (1) contacts with road bed is vertical, is provided with smooth plates at surface of contact.
2, the true displacement measurement stake of railway subgrade surface according to claim 1 is characterized in that smooth plates is a glass plate.
3, the true displacement measurement stake of railway subgrade surface according to claim 2, the model that it is characterized in that the resistance-strain type displacement meter is WD310.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420016443 CN2718515Y (en) | 2004-07-26 | 2004-07-26 | Railway bed surface true displacement test peg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420016443 CN2718515Y (en) | 2004-07-26 | 2004-07-26 | Railway bed surface true displacement test peg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2718515Y true CN2718515Y (en) | 2005-08-17 |
Family
ID=34892640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420016443 Expired - Fee Related CN2718515Y (en) | 2004-07-26 | 2004-07-26 | Railway bed surface true displacement test peg |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2718515Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346027A (en) * | 2011-09-23 | 2012-02-08 | 西南交通大学 | Method for testing the horizontal displacement of CRTS-II type plate ballastless rail bridge abutment of high-speed railway |
| CN102353350A (en) * | 2011-07-06 | 2012-02-15 | 西南交通大学 | Apparatus for measuring structure horizontal displacement relative to roadbed |
| CN107607030A (en) * | 2017-09-22 | 2018-01-19 | 山东大学 | The monitoring of structures and its construction method of a kind of existing roadbed, slope stability |
-
2004
- 2004-07-26 CN CN 200420016443 patent/CN2718515Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353350A (en) * | 2011-07-06 | 2012-02-15 | 西南交通大学 | Apparatus for measuring structure horizontal displacement relative to roadbed |
| CN102346027A (en) * | 2011-09-23 | 2012-02-08 | 西南交通大学 | Method for testing the horizontal displacement of CRTS-II type plate ballastless rail bridge abutment of high-speed railway |
| CN107607030A (en) * | 2017-09-22 | 2018-01-19 | 山东大学 | The monitoring of structures and its construction method of a kind of existing roadbed, slope stability |
| CN107607030B (en) * | 2017-09-22 | 2024-01-23 | 山东大学 | Existing roadbed and slope stability monitoring structure and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |