CN105716511A - Bridge static load test deflection dial indicator measuring and connecting device - Google Patents
Bridge static load test deflection dial indicator measuring and connecting device Download PDFInfo
- Publication number
- CN105716511A CN105716511A CN201610196433.8A CN201610196433A CN105716511A CN 105716511 A CN105716511 A CN 105716511A CN 201610196433 A CN201610196433 A CN 201610196433A CN 105716511 A CN105716511 A CN 105716511A
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- bridge
- dial gauge
- steel wire
- spring
- girder steel
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- 230000003068 static effect Effects 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 70
- 238000005452 bending Methods 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000004575 stone Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
Classifications
-
- 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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
-
- 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
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Bridges Or Land Bridges (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a bridge static load test deflection dial indicator measuring and connecting device and belongs to bridge engineering technologies.The device comprises a steel wire, a steel beam and a V-shaped spring; the V-shaped spring is formed by bending a long spring by 120-150-degree-angle from the middle to form connectors, the other ends of the spring are connected with the two ends of the steel beam respectively, and the steel wire is connected to the middle of the steel beam; the steel wire is provided with LED alarm lamps; the device further comprises a dial indicator, pointers of the dial indicator make contact with the center of the steel beam, and the dial indicator is fixed to the ground and the inverted bridge face through a magnetic meter seat.By means of the bridge static load test deflection dial indicator measuring and connecting device, deflection measuring becomes convenient, fast and free of limitation of the bridge environment, and influence factors of result precision are reduced.
Description
Technical field
The present invention relates to a kind of bridge static loading test amount of deflection dial gauge and measure connecting device, belong to science of bridge building technology.
Background technology
Bridge is the key node in national communication line network, and its safety is of crucial importance, and therefore bridge worker needs often the safety of bridge to be carried out check and evaluation.In current check and evaluation, it is common that adopt the method for static test that load carrying capacity of bridge and safety are estimated, and namely have an important parameter in assessing is the deflection metrology value in bridge key cross section.Traditional test bridge key cross section amount of deflection adopts level gauge to measure, the method needs to measure the point-to-point transmission discrepancy in elevation on ground with level gauge and levelling rod, but the method at least needs 2 people, labor intensive, measuring accuracy is helped human users's deviation considerable influence by level gauge self precision, survey reading personnel's deviation of reading, the precision of levelling rod own, levelling rod simultaneously.
Summary of the invention
For above-mentioned technical problem, the present invention provides a kind of bridge static loading test amount of deflection dial gauge to measure connecting device, makes deflection metrology become restriction that is convenient, fast and that be not subject to bridge environment.
For solving above technical problem, this inventive technique scheme is as follows:
Connecting device measured by bridge static loading test amount of deflection dial gauge, including steel wire, girder steel and V-arrangement spring；Described V-arrangement spring is become union joint by a root length spring from middle 120～150 degree of dihedrals of bending, and other end is connected with girder steel two ends respectively, and described steel wire is connected to girder steel centre position；Steel wire is connected to LED warning lamp；Also including dial gauge, described dial gauge pointer contacts with girder steel center, bridge floor when dial gauge is fixed on ground by magnetic stand and is inverted.
Including disk and circular hole in the middle of girder steel, circular hole is used for connecting steel wire, and girder steel two ends are provided with hole and are connected with V-arrangement spring respectively.
Also include reaction frame, be used for being inverted use.
Steel wire length is between 3-20m, and steel wire diameter is about 1mm.
Girder steel adopts Q235 steel, is about 30cm, wide about 3cm, and thickness is 0.4cm about, and there is the version of disk centre.Being provided with circular hole in the middle part of girder steel, be used for connecting steel wire, girder steel two ends are provided with hole and are connected with V-arrangement spring respectively.
Stroke for ensureing spring more than the deflection value of bridge and can freely stretch, and each edge length 30～50cm of V-arrangement spring, the Line stiffness of spring controls at 5～10N/mm.
When just putting use, it is suitable under bridge and is convenient to the terrain environment that staff arrives and fixes spring, steel wire upper end is connected and fixed on the expansion bolt at the bottom of Bridge Beam, steel wire lower end connects the circular hole in girder steel centre position, girder steel two ends are connected with V-arrangement spring respectively, the union joint of V-arrangement spring is connected with the expansion bolt squeezing into stone, and the union joint of V-arrangement spring can also fixing with the drill rod inserting ground be connected；Girder steel centre position disk is as dial gauge indicator test platform.
When being the landform that spring and staff's entrance cannot be fixed in river, mountain valley etc. below bridge, can adopt to be inverted and use: connect the union joint of V-arrangement spring at bridge floor by reaction frame, V-arrangement spring is inverted, it is inverted V-arrangement both ends of the spring and connects girder steel two ends respectively, in the middle part of girder steel, circular hole is connected with steel wire, steel wire lower end connects by the expansion bolt squeezing into stone is fixing, and stone can be positioned under bridge ground or the bottom；In the middle part of girder steel, disk is as the dial gauge indicator test platform being fixed on bridge floor.
In test process, steel wire all should being kept vertical, dial gauge lay down location should facilitate artificial reading.Dial gauge test has precision height, tests the advantages such as quick.The precision of dial gauge reaches 0.01mm, range 50～100mm, is especially suitable for the test request of conventional static load 0.5～50mm amount of deflection across footpath bridge.After dial gauge sets up, observed reading is very convenient, it is also possible to adopt electromechanical dial gauge automatically to survey reading.
Owing to steel wire is elongated, it is likely in the work environment be subject to artificial disturbance, such as collision etc., therefore LED safety warning light is set on steel wire, it is to avoid normally uses to device and brings interference.
Connecting device measured by bridge static loading test amount of deflection dial gauge provided by the invention, it is provided that the measuring method of bridge key cross section amount of deflection, makes deflection metrology become restriction that is convenient, fast and that be not subject to bridge environment.Compared to tradition level gauge lateral deflection, these apparatus and method only need 1 people 1 table or 1 people's multilist to carry out, and speed is faster.Dial gauge belongs to stem-winder, and its precision is 0.01mm, can estimate reading to 0.001mm, and measuring accuracy is only limited by the impact of staff's error in reading simultaneously, decreases the influence factor to result precision.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is that the present invention is inverted use schematic diagram；
Fig. 3 is the steel beam structure schematic diagram of the present invention.
Detailed description of the invention
Accompanying drawings the specific embodiment of the present invention.
As it is shown in figure 1, connecting device measured by bridge static loading test amount of deflection dial gauge, including steel wire 2, girder steel 3 and V-arrangement spring 5；Described V-arrangement spring 5 is become union joint by a root length spring from middle 120～150 degree of dihedrals of bending, and other end is connected with girder steel 3 two ends respectively, and described steel wire 2 is connected to girder steel 3 centre position；Steel wire 2 is connected to LED warning lamp 11；Also including dial gauge 4, described dial gauge 4 pointer contacts with girder steel 3 center, bridge floor when dial gauge 4 is fixed on ground by magnetic stand 8 and is inverted.
As it is shown on figure 3, include disk and circular hole in the middle of girder steel 3, circular hole is used for connecting steel wire 2, and girder steel 3 two ends are provided with hole and are connected with V-arrangement spring 5 respectively.
When just putting use, it is suitable under bridge and is convenient to the terrain environment that staff arrives and fixes spring, steel wire 2 upper end is connected and fixed on the expansion bolt 10 at the bottom of bridge 1 beam, steel wire 2 lower end connects the circular hole in girder steel 3 centre position, girder steel 3 two ends are connected with V-arrangement spring 5 respectively, the union joint of V-arrangement spring 5 is connected with the expansion bolt squeezing into stone, and the union joint of V-arrangement spring 5 can also fixing with the drill rod 6 inserting ground 7 be connected；Girder steel 3 centre position disk is as dial gauge 4 indicator test platform.
Just putting in use, when needing the road surface below protection bridge, the union joint of V-arrangement spring 5 is fixed on the stone immediately below bridge test cross section by expansion bolt can be protected on the object on road surface；When below bridge, ground does not need special protection, and when working environment is inconvenient to provide the objects such as stone, the union joint of V-arrangement spring 5 fixed by optional drill rod 6.
When device is upright, L1 length, between 3 to 20m, is determined according to concrete space under bridge.L3 is between 30 to 60cm.The locus of C point and D point is fixed, and the length of L1 is definite value.When bridge key cross section amount of deflection increases Δ x, A point decline Δ x, driving B point decline Δ x, spring contraction, L3 reduces Δ x.Due to C space of points invariant position, therefore, girder steel promotes dial gauge pointer to move Δ x, and dial gauge reading increases Δ x.
As shown in Figure 2, when being the landform that spring and staff's entrance cannot be fixed in river, mountain valley etc. below bridge 1, can adopt to be inverted and use: connect the union joint of V-arrangement spring 5 at bridge floor by reaction frame 12, V-arrangement spring 5 is inverted, it is inverted V-arrangement spring 5 two ends and connects girder steel 3 two ends respectively, in the middle part of girder steel 3, circular hole is connected with steel wire 2, and steel wire 2 lower end connects by the expansion bolt squeezing into stone 9 is fixing, and stone 9 can be positioned under bridge ground or the bottom；In the middle part of girder steel 3, disk is as the dial gauge indicator test platform being fixed on bridge floor.
Steel wire 2 hangs under bridge by weight, makes B space of points position remain unchanged.
V-arrangement spring 5 is in tension state, and the elongation of spring should more than Bridge control cross section amount of deflection.
This connecting device should be inverted, L1 infinite in length system, only needs to hitch weight, hangs under bridge, make B space of points position remain unchanged.Due to the position that dial gauge is not changed by the amount of deflection that magnetic stand is fixed on bridge, therefore C space of points position is fixed.When bridge key cross section amount of deflection increases Δ x, D point decline Δ x, driving B point decline Δ x, spring does not shrink, and L3 length does not change.Due to C space of points invariant position, therefore, steel disc drives dial gauge pointer to move Δ x, and dial gauge reading reduces Δ x.
Claims (3)
1. connecting device measured by bridge static loading test amount of deflection dial gauge, it is characterised in that: include steel wire (2), girder steel (3) and V-arrangement spring (5)；Described V-arrangement spring (5) is become union joint by a root length spring from middle 120～150 degree of dihedrals of bending, other end is connected with girder steel (3) two ends respectively, and described steel wire (2) is connected to girder steel (3) centre position；Steel wire (2) is connected to LED warning lamp (11)；Also including dial gauge (4), described dial gauge (4) pointer contacts with girder steel (3) center, bridge floor when dial gauge (4) is fixed on ground by magnetic stand (8) and is inverted.
2. connecting device measured by bridge static loading test amount of deflection dial gauge according to claim 1, it is characterized in that: in the middle of described girder steel (3), include disk and circular hole, circular hole is used for connecting steel wire (2), and girder steel (3) two ends are provided with hole and are connected with V-arrangement spring (5) respectively.
3. connecting device measured by bridge static loading test amount of deflection dial gauge according to claim 1 and 2, it is characterised in that: also include reaction frame (12), be used for being inverted use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610196433.8A CN105716511B (en) | 2016-03-31 | 2016-03-31 | Bridge static loading test amount of deflection dial gauge measures attachment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610196433.8A CN105716511B (en) | 2016-03-31 | 2016-03-31 | Bridge static loading test amount of deflection dial gauge measures attachment device |
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| Publication Number | Publication Date |
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| CN105716511A true CN105716511A (en) | 2016-06-29 |
| CN105716511B CN105716511B (en) | 2018-11-30 |
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| CN201610196433.8A Expired - Fee Related CN105716511B (en) | 2016-03-31 | 2016-03-31 | Bridge static loading test amount of deflection dial gauge measures attachment device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908207A (en) * | 2017-03-21 | 2017-06-30 | 西南交通大学 | A kind of bridge static loading test deflection measuring apparatus and method |
| CN109578695A (en) * | 2018-12-12 | 2019-04-05 | 长安大学 | A kind of piping lane bracket adaptively deformed |
| CN114111541A (en) * | 2021-11-24 | 2022-03-01 | 长安大学 | Bridge dynamic deflection testing system and method based on stress rigidization effect |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07225181A (en) * | 1994-02-14 | 1995-08-22 | Kawasaki Steel Corp | Method and apparatus for measurement of dent property of metal material |
| CN1234497A (en) * | 1999-01-25 | 1999-11-10 | 太原重型机械(集团)有限公司 | Laser detection method and apparatus for lower flexibility of main girder of crane |
| CN2532475Y (en) * | 2001-07-07 | 2003-01-22 | 重庆大学 | Direct projection type photoelectric disturbance displacement measurer |
| CN1542405A (en) * | 2003-11-06 | 2004-11-03 | 同济大学 | Method for monitoring large span bridge structural deflection |
| CN2748868Y (en) * | 2003-12-31 | 2005-12-28 | 重庆大学 | Bridge beam deflection photoelectric automatic measuring apparatus |
| CN202274855U (en) * | 2011-10-29 | 2012-06-13 | 中铁一局集团有限公司 | Deflection testing system for bridge load test |
| CN203704829U (en) * | 2014-02-24 | 2014-07-09 | 甘肃省交通科学研究院有限公司 | Bridge static load experiment displacement monitoring device |
| CN205482765U (en) * | 2016-03-31 | 2016-08-17 | 西南交通大学 | Connecting device is measured to bridge static loading test amount of deflection percentage table |
-
2016
- 2016-03-31 CN CN201610196433.8A patent/CN105716511B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07225181A (en) * | 1994-02-14 | 1995-08-22 | Kawasaki Steel Corp | Method and apparatus for measurement of dent property of metal material |
| CN1234497A (en) * | 1999-01-25 | 1999-11-10 | 太原重型机械(集团)有限公司 | Laser detection method and apparatus for lower flexibility of main girder of crane |
| CN2532475Y (en) * | 2001-07-07 | 2003-01-22 | 重庆大学 | Direct projection type photoelectric disturbance displacement measurer |
| CN1542405A (en) * | 2003-11-06 | 2004-11-03 | 同济大学 | Method for monitoring large span bridge structural deflection |
| CN2748868Y (en) * | 2003-12-31 | 2005-12-28 | 重庆大学 | Bridge beam deflection photoelectric automatic measuring apparatus |
| CN202274855U (en) * | 2011-10-29 | 2012-06-13 | 中铁一局集团有限公司 | Deflection testing system for bridge load test |
| CN203704829U (en) * | 2014-02-24 | 2014-07-09 | 甘肃省交通科学研究院有限公司 | Bridge static load experiment displacement monitoring device |
| CN205482765U (en) * | 2016-03-31 | 2016-08-17 | 西南交通大学 | Connecting device is measured to bridge static loading test amount of deflection percentage table |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908207A (en) * | 2017-03-21 | 2017-06-30 | 西南交通大学 | A kind of bridge static loading test deflection measuring apparatus and method |
| CN106908207B (en) * | 2017-03-21 | 2019-02-01 | 西南交通大学 | A kind of bridge static loading test deflection measuring apparatus and method |
| CN109578695A (en) * | 2018-12-12 | 2019-04-05 | 长安大学 | A kind of piping lane bracket adaptively deformed |
| CN114111541A (en) * | 2021-11-24 | 2022-03-01 | 长安大学 | Bridge dynamic deflection testing system and method based on stress rigidization effect |
| CN114111541B (en) * | 2021-11-24 | 2024-01-19 | 长安大学 | Bridge dynamic deflection test system and method based on stress rigidization effect |
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| Publication number | Publication date |
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| CN105716511B (en) | 2018-11-30 |
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Granted publication date: 20181130 |