CN103808282A - Anchorage structure displacement monitoring device and method - Google Patents
Anchorage structure displacement monitoring device and method Download PDFInfo
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- CN103808282A CN103808282A CN201410096725.5A CN201410096725A CN103808282A CN 103808282 A CN103808282 A CN 103808282A CN 201410096725 A CN201410096725 A CN 201410096725A CN 103808282 A CN103808282 A CN 103808282A
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Abstract
The invention relates to an anchorage structure displacement monitoring device and method. The device comprises a measuring piston assembly and a basis piston assembly which are of the same structure; the measuring piston assembly comprises a first liquid container, a first glass tube communicated with the top of the first liquid container, and a first piston arranged in the first liquid container; the bottom of the first piston is fixedly connected with one end of a piston connecting rod, the bottom of the first liquid container is provided with a through hole, and the other end of the piston connecting rod penetrates the through hole and matches with the through hole through sealing; the inside diameter of the first liquid container is N times larger than the diameter of the first glass tube. According to the method, the measuring piston assembly and the basis piston assembly are fixed in an anchor chamber in parallel, the measuring piston assembly is fixed onto the surface of an anchorage region through the piston connecting rod, two glass tubes are filled with liquid of equal amount, the liquid level L1 and the liquid level L2 of the two glass tubes are collected in accordance with a detection period, and L1 and L2 are used in a formula Li=(L1-L2)d(2)/D(2) to obtain the displacement Li of the anchorage region in a stressed direction. The device and method which are established through a displacement difference value enlargement method are low in monitoring cost and high in monitoring speed and accuracy, and the device is simple in structure.
Description
Technical field
The present invention relates to a kind of suspension bridge anchorage zone displacement monitoring method, relate in particular to the device and method that a kind of displacement differential technique carries out the monitoring of anchorage displacement structure.
Background technology
Suspension bridge is one of the most frequently used super-huge, large bridge bridge type, and these large bridges are all in each traffic main artery, invests hugely, and investment and maintenance cost are the hat of various bridge types.In operation process, vehicle flowrate is very large, loads heavy, and the development of the national economy is had to immeasurable significance.Once security incident occurs these bridges, all serious consequence will be caused for the stable of national economic construction and society.Because Analysis of Suspension Bridges ' Anchorage is bearing horizontal force and the vertical counter-force from main push-towing rope, it is one of main bearing structure.Once anchorage structure is destroyed, can cause bridge to ruin the serious accident that people dies, consequence is hardly imaginable.
Tunnel-type anchorage must be embedded in the good country rock of engineering geological condition, and therefore in the middle of operation process, the stability of country rock is most important.Water erosion environment can reduce the stability on tunnel-type anchorage country rock and gravity anchor basis, changes the stressed of anchorage and distortion, causes the generation of the diseases such as anchor chamber cracking and off normal, anchor head and loose cable saddle corrosion, and then affects the operation security of bridge structure.Therefore, carry out safety monitoring for the suspension bridge anchorage zone under water erosion environment very necessary, need to be for suspension bridge anchorage zone, carry out monitoring and technology state evaluating, early warning technology and device research and development.
Stressed and the distortion of suspension bridge anchorage zone gathers the technology status of judge bridge most important.Structural stress is monitored, need to lay many foil gauges or optical fiber, intelligent sensor, cost is very high; And displacement structure is monitored, only need in anchorage zone, lay the stressed and degree of impairment that minority reference mark just can inverting anchorage structure.
There are at present two kinds of method and apparatus to monitor the displacement of anchorage zone: to utilize laser carry out the method (201210399733.8) of anchorage displacement structure monitoring and utilize pressure differential to carry out the method for anchor structure displacement monitoring (201210394633.6).Wherein utilize method that laser carries out the monitoring of anchorage displacement structure along with the prolongation laser instrument of time can twist, cause light spot shape and position to produce and change, monitoring result is caused to larger error; The method of utilizing pressure differential to carry out anchor structure displacement monitoring is not suitable for darker tunnel, and in the time that pressure differential range increases, monitoring accuracy can decrease.
Summary of the invention
The problems referred to above that exist for prior art, an object of the present invention is how to provide a kind of simple in structure, wide adaptability, the anchorage displacement structure monitoring device that monitoring accuracy is high.
Another object is to provide a kind of monitoring method of monitoring anchorage displacement structure.
For achieving the above object, the present invention adopts following technical scheme: a kind of anchorage displacement structure monitoring device, comprise piston brace rod and measure piston component, described mensuration piston component comprises the first Sheng liquid device, the first glass tube being communicated with the first Sheng liquid device top and be arranged on the first piston in the first Sheng liquid device, the inwall that the outer wall of first piston and first is contained liquid device slides and is sealed and matched, the bottom of first piston is fixedly connected with one end of piston brace rod, the described first bottom of containing liquid device has the through hole that the other end for making piston brace rod passes, described through hole and piston brace rod are sealed and matched, the described first internal diameter of containing liquid device is that the N of the first diameter glass tube accompanies, and N is natural number.
In the time that temperature changes, the stroke of piston brace rod can cause certain influence to measurement result.As a preferred embodiment of the present invention, need to study the linear thermal expansion ratio of piston brace rod, make monitoring result more accurate, preferably can select the material that linear expansivity material is low, as invar.
The method that the anchorage displacement structure monitoring device limiting in application such scheme carries out the monitoring of anchorage displacement structure, specifically comprises the steps:
1) mensuration piston component notice support is fixedly mounted on to anchor indoor, wherein first piston bottom is fixing by piston brace rod and surface, anchorage zone;
2) by the first glass tube mouth of pipe to filling liquid in the first Sheng liquid device, the liquid level of institute's fluid injection body and the first glass tube mouth of pipe have suitable safe distance, facilitate the fluctuating reading of follow-up liquid levels;
3) height value of liquid level on each temperature spot in the first glass tube when serviceability temperature meter demarcation mensuration piston component does not stress
,
ifor natural number;
4) set monitoring frequency, gather and on each time point, measure piston component and be subject to after anchor force liquid level in the first glass tube according to the monitoring frequency of setting
temperature spot with this time;
5) will collect at every turn
with synthermal corresponding
bring formula into
calculate, in formula
for
ithe height value of liquid level in the first glass tube when measuring piston component under individual temperature spot and not stressing,
for
iunder individual temperature spot, measure piston component and be subject to after anchor force liquid level value in the first glass tube,
be
ithe displacement of the height of liquid level after stressed in the first glass tube under individual temperature spot, will
bring formula (1) into,
for anchorage zone is in
iindividual temperature spot is in the displacement being subject on force direction, and d is the internal diameter of the first glass tube, and D is the internal diameter of the first Sheng liquid device.
As a preferred embodiment of the present invention, a kind of anchorage displacement structure monitoring device also comprises benchmark piston component, and benchmark piston component comprises the second Sheng liquid device, the second glass tube being communicated with the second Sheng liquid device top and be arranged on the second piston in the second Sheng liquid device; Described second contains liquid device, and and the first Sheng liquid device is parallel and internal diameter equal, and the second glass tube is parallel with the first glass tube and internal diameter equal.The advantage that increases benchmark piston component has: the liquid level reading that 1, does not need to demarcate in advance each temperature spot in the situation that not stressing; 2, have benchmark piston component, can reflect in real time current actual displacement amount; 3, in the time that temperature variation is very small, can cause certain error by thermometer, but benchmark piston component and mensuration piston just can be revised the error that small temperature variation causes completely under same environment.
As another kind of preferred version of the present invention, a kind of anchorage displacement structure monitoring device also comprises image capture instrument and industrial computer, described image capture instrument is connected with industrial computer, realize real-time reception and the long term data storage of data, image capture instrument is used for catching liquid level, described industrial computer is for real-time reception, monitoring, longer-term storage and analysis to image capture instrument transmission data, industrial computer connects by Internet or mobile communications network, realizes in long-range data monitoring, storage and analysis.
The method that the anchorage displacement structure monitoring device limiting in application such scheme carries out the monitoring of anchorage displacement structure, specifically comprises the steps:
1) mensuration piston component and benchmark piston component are walked abreast by support to be fixedly mounted on anchor indoor, wherein measure piston component fixing by piston brace rod and surface, anchorage zone, benchmark piston component is fixed by fixed support;
2) position of the first piston in piston component and the second piston in benchmark piston component is measured in adjustment, makes first piston consistent with respect to the initial position of anchorage zone with second-phase piston, and the piston position of benchmark piston component is fixed;
3) contain filling liquid in liquid device by the first glass tube mouth of pipe and the second glass tube mouth of pipe to the first Sheng liquid device, second respectively, and institute adds amount of liquid and is consistent;
4) set sense cycle or frequency to liquid level in two glass tubes
,
gather;
5) by the liquid level gathering at every turn
,
bring formula (2) into,
With respect to prior art, tool of the present invention has the following advantages:
1, the present invention utilizes the principle that the liquid volume of fixed capacity does not change under uniform temperature condition, and the method that adopts displacement difference to amplify has designed the high anchorage displacement structure monitoring device of monitoring accuracy.
2, displacement monitor is simple in structure, and cost is low, monitors easy for installationly, and the pot life is long.
3, the method that this employing displacement difference amplifying method carries out anchor structure displacement monitoring can effectively obtain the related datas such as peristalsis frequency, amplitude and the long-term tendency of anchorage zone, monitoring accuracy is high, monitoring velocity is fast, can be directly connected to the network, reach the requirement of Internet of Things; The method monitoring cost is low simultaneously.
4, these apparatus and method propose based on tunnel anchor, in the time monitoring, be not subject to the impact of the tunnel degree of depth completely, be not subject to the impact of there and then air pressure and acceleration of gravity, and it is simple to operate to carry out the method for anchorage displacement structure monitoring with respect to laser, monitoring accuracy is high.
Accompanying drawing explanation
Fig. 1 is this monitoring device mounting structure schematic diagram;
Fig. 2 is the structural representation that in glass tube, liquid level moves front and back.
In figure: 1-anchorage zone; 2-mensuration piston component; 3-benchmark piston component; 4-fixed support; 5-cablet; 6-main push-towing rope; 7-piston brace rod; 8-first piston; 9-the first contains liquid device; The 10-the first glass tube; 11-piston moving displacement; Liquid level moving displacement in the 12-the first glass tube; 13-image capture instrument; The 14-the second piston; 15-the second contains liquid device; The 16-the second glass tube.
Embodiment
Below in conjunction with attached Fig. 1 and 2, the present invention is described in further detail.
embodiment 1:a kind of anchorage displacement structure monitoring device, comprise piston brace rod 7 and measure piston component 2, plug connecting link 7 adopts invar material to make, measure piston component 2 and comprise the first Sheng liquid device 9, the first glass tube 10 being communicated with the first Sheng liquid device 9 tops and be arranged on the first piston 8 in the first Sheng liquid device 9, the inwall that the outer wall of first piston 8 and first is contained liquid device 9 slides and is sealed and matched, the bottom of first piston 8 is fixedly connected with one end of piston brace rod 7, the first bottom of containing liquid device 9 has the through hole that the other end for making piston brace rod 7 passes, through hole and piston brace rod 7 are sealed and matched, the first internal diameter of containing liquid device 9 is that the N of the first glass tube 10 diameters accompanies, and N is natural number, and the value of N can need to set according to monitoring accuracy, and monitoring accuracy reaches as high as micron level.
embodiment 2:the method that anchorage displacement structure monitoring device in Application Example 1 carries out the monitoring of anchorage displacement structure: concrete steps are as follows:
1) mensuration piston component 2 is fixedly mounted on to anchor by support indoor, wherein measures piston component 2 fixing with 1 surface, anchorage zone by piston brace rod 7;
2) by the first glass tube mouth of pipe 10 to the first Sheng liquid device 9 interior filling liquids, the liquid level of institute's fluid injection body and the first glass tube mouth of pipe 10 have suitable safe distance, facilitate the fluctuating reading of follow-up liquid levels;
3) height value of the interior liquid level of the first glass tube 10 on each temperature spot when serviceability temperature meter demarcation mensuration piston component 2 does not stress
,
ifor natural number;
4) set monitoring frequency, gather and on each time point, measure piston component and be subject to after anchor force liquid level in the first glass tube according to the monitoring frequency of setting
temperature spot with this time;
5) will collect at every turn
with synthermal corresponding
bring formula into
calculate, in formula
for
ithe height value of the first glass tube 10 interior liquid levels when measuring piston component 2 under individual temperature spot and not stressing,
for
iunder individual temperature spot, measure piston component 2 and be subject to the interior liquid level value of the first glass tube 10 after anchor force,
be
ithe displacement of the height of the first glass tube 10 interior liquid levels after stressed under individual temperature spot, will
bring formula (1) into,
（1）
For convenient inspection gathers liquid level, can on the first glass tube 10 liquid levels, to cover one deck coloured and be insoluble to the organism of liquid.
embodiment 3:on the basis of the anchorage displacement structure monitoring device described in embodiment 1, increase benchmark piston component 3, benchmark piston component 3 comprises the second Sheng liquid device 15, the second glass tube 16 being communicated with the second Sheng liquid device 15 tops and be arranged on the second piston 14 in the second Sheng liquid device 15, it is identical that the second Sheng liquid device 15 materials used and first are contained liquid device 9, second contains liquid device 15, and and the first Sheng liquid device 9 is parallel and internal diameter equal, the second glass tube 16 material used is identical with the first glass tube 10, and the second glass tube 16 is parallel with the first glass tube 10 and internal diameter equal.
Also comprise image capture instrument 13 and industrial computer in order to improve monitoring accuracy, image capture instrument is connected with industrial computer, and image capture instrument is used for catching liquid level, and industrial computer is for real-time reception, monitoring, longer-term storage and analysis to image capture instrument transmission data.
embodiment 4:the method that anchorage displacement structure monitoring device in Application Example 3 carries out the monitoring of anchorage displacement structure: concrete steps are as follows:
1) to be fixedly mounted on anchor indoor by parallel mensuration piston component 2 and benchmark piston component 3, wherein measures piston component 2 fixing with 1 surface, anchorage zone by piston brace rod 7, and benchmark piston component 3 is fixedly laid by fixed support 4 or other modes;
2) position of the first piston 8 in piston component 2 and the second piston 14 in benchmark piston component 3 is measured in adjustment, makes first piston 8 consistent with respect to the initial position of anchorage zone 1 with second-phase piston, and the piston position of benchmark piston component 3 is fixed;
3) contain filling liquid in liquid device by the first glass tube mouth of pipe and the second glass tube mouth of pipe to the first Sheng liquid device, second respectively, and institute adds amount of liquid and is consistent;
4) set sense cycle or frequency to liquid level in two glass tubes
,
gather (set sense cycle or frequency, as 20HZ, per secondly liquid level in the first glass tube 10 and the second glass tube 16 is carried out to 20 times gather and calculate);
5) by the liquid level gathering at every turn
,
bring formula (2) into,
for measuring the liquid level in the first glass tube 10 in piston component 2,
for the liquid level in the second glass tube 16 in benchmark piston component 3, d is the internal diameter of the first glass tube 10 or the second glass tube 16, and D is the internal diameter that the first Sheng liquid device 9 or second is contained liquid device 15,
for anchorage zone is in the displacement being subject on force direction.
Gather liquid level can on the second glass tube 16 liquid levels, to cover one deck coloured and be insoluble to the organism of liquid for convenient.
The principle of this monitoring method: two grip assemblies are all placed in to anchor is indoor not to be subjected to displacement or the known place of displacement substantially by fixed support 4 is parallel, be fixedly mounted on 1 surface, anchorage zone by piston brace rod 7 owing to measuring piston component 2, while wriggling before and after occurring when the stressed variation in anchorage zone, measure first piston 8 in piston component and move that (establishing first piston moving displacement in the first Sheng liquid device is thereupon
), and then impact is measured liquid level in the first glass tube 10 in piston component and is changed that (establishing liquid level in the first glass tube is
).Due to the stretching/compressing volume constancy of fixed amount liquid, the first liquid volume change amount (establishing the first Sheng liquid device internal diameter is D) in liquid device of containing equals the stereomutation amount of the first glass liquid in pipe, and (establishing the first glass tube internal diameter is d),
.Benchmark piston component 3 is except being connected with anchorage zone without piston brace rod, other are with to measure piston component identical, the liquid in two assemblies under identical condition, can cause in the first and second glass tubes liquid level that identical change occurs owing to expanding with heat and contract with cold (establishing liquid level in the second glass tube is
), above formula more becomes:
, wherein
to revise temperature to affect liquid height actual change amount in the first glass tube causing, so the displacement of first piston reality (being anchorage zone in the displacement being subject on force direction) is:
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (8)
1. an anchorage displacement structure monitoring device, it is characterized in that: comprise piston brace rod (7) and measure piston component (2), described mensuration piston component (2) comprises the first Sheng liquid device (9), the first glass tube (10) being communicated with the first Sheng liquid device (9) top and be arranged on the first piston (8) in the first Sheng liquid device (9), the inwall that the outer wall of described first piston (8) and first is contained liquid device (9) slides and is sealed and matched, the bottom of first piston (8) is fixedly connected with one end of piston brace rod (7), the described first bottom of containing liquid device (9) has the through hole that the other end for making piston brace rod (7) passes, described through hole and piston brace rod (7) are sealed and matched, the described first internal diameter of containing liquid device (9) is that the N of the first glass tube (10) internal diameter accompanies, and N is natural number.
2. anchorage displacement structure monitoring device as claimed in claim 1, is characterized in that: described piston brace rod (7) adopts invar material to make.
3. anchorage displacement structure monitoring device as claimed in claim 1, it is characterized in that: also comprise benchmark piston component (3) and for supporting the fixed support (4) of benchmark piston component (3), described benchmark piston component (3) comprises the second Sheng liquid device (15), the second glass tube (16) being communicated with the second Sheng liquid device (15) top and be arranged on the second piston (14) in the second Sheng liquid device (15), described second contains liquid device (15), and and the first Sheng liquid device (9) is parallel and internal diameter equal, the second glass tube (16) is parallel with the first glass tube (10) and internal diameter equal.
4. the anchorage displacement structure monitoring device as described in claim 1-3 any one, it is characterized in that: also comprise image capture instrument and industrial computer, described image capture instrument is connected with industrial computer, image capture instrument is used for catching liquid level, and described industrial computer is for real-time reception, monitoring, longer-term storage and analysis to image capture instrument transmission data.
5. the method that described in employing claim 1, anchorage displacement structure monitoring device carries out the monitoring of anchorage displacement structure, is characterized in that: specifically comprise the steps:
To measure piston component (2), to be fixedly mounted on anchor indoor, wherein measures piston component (2) fixing with surface, anchorage zone (1) by piston brace rod (7);
By the first glass tube mouth of pipe, to filling liquid in the first Sheng liquid device, the liquid level of liquid is lower than the first glass tube mouth of pipe;
The height value of the interior liquid level of the first glass tube (10) on each temperature spot when serviceability temperature meter demarcation mensuration piston component (2) does not stress
,
ifor natural number;
Set monitoring frequency, gather and on each time point, measure piston component (2) and be subject to the interior liquid level of the first glass tube (10) after anchor force according to the monitoring frequency of setting
temperature spot with this time;
By what collect at every turn
with synthermal corresponding
bring formula into
calculate, in formula
for
ithe height value of the interior liquid level of the first glass tube (10) when measuring piston component (2) under individual temperature spot and not stressing,
for
iunder individual temperature spot, measure piston component (2) and be subject to the interior liquid level value of the first glass tube (10) after anchor force,
be
ithe displacement of the height of the interior liquid level of the first glass tube (10) after stressed under individual temperature spot, will
bring formula (1) into,
6. the method for anchorage displacement structure as claimed in claim 5 monitoring, is characterized in that: on the liquid level in the first glass tube (10), cover one deck coloured and be insoluble to the organism of liquid.
7. the method that described in employing claim 3, anchorage displacement structure monitoring device carries out the monitoring of anchorage displacement structure, is characterized in that: specifically comprise the steps:
1) measuring piston component (2) and benchmark piston component (3), parallel to be fixedly mounted on anchor indoor, wherein measure piston component (2) fixing with surface, anchorage zone (1) by piston brace rod (7), benchmark piston component (3) is fixing by fixed support (4);
2) position of the first piston (8) in piston component (2) and the second piston (14) in benchmark piston component (3) is measured in adjustment, make first piston (8) identical with respect to the elemental height of anchorage zone (1) with the second piston (14), in benchmark piston component (3), the position of the second piston (14) is fixed;
3) contain filling liquid in liquid device by the first glass tube mouth of pipe and the second glass tube mouth of pipe to the first Sheng liquid device, second respectively, and institute adds amount of liquid and is consistent;
4) set sense cycle or frequency to liquid level in two glass tubes
,
gather;
5) by the liquid level gathering at every turn
,
bring formula (2) into,
8. the method for anchorage displacement structure as claimed in claim 7 monitoring, is characterized in that: on the liquid level in described the second glass tube (16), cover one deck coloured and be insoluble to the organism of liquid.
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|---|---|---|---|
| CN201410096725.5A CN103808282B (en) | 2014-03-17 | 2014-03-17 | A kind of anchorage structures displacement monitor and method |
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|---|---|---|---|
| CN201410096725.5A CN103808282B (en) | 2014-03-17 | 2014-03-17 | A kind of anchorage structures displacement monitor and method |
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| CN103808282B CN103808282B (en) | 2016-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330037A (en) * | 2014-11-24 | 2015-02-04 | 重庆交通大学 | Displacement monitoring device and method for laser projection type anchorage structure |
| CN104482889A (en) * | 2014-12-28 | 2015-04-01 | 武汉联创恒业科技有限公司 | Detection device for detecting plate thickness |
| CN107246837A (en) * | 2017-05-19 | 2017-10-13 | 来安县华鹏摩擦材料厂 | A kind of brake clutch piece roughness detection equipments |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330037A (en) * | 2014-11-24 | 2015-02-04 | 重庆交通大学 | Displacement monitoring device and method for laser projection type anchorage structure |
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| CN104482889A (en) * | 2014-12-28 | 2015-04-01 | 武汉联创恒业科技有限公司 | Detection device for detecting plate thickness |
| CN107246837A (en) * | 2017-05-19 | 2017-10-13 | 来安县华鹏摩擦材料厂 | A kind of brake clutch piece roughness detection equipments |
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| CN103808282B (en) | 2016-08-17 |
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