CN105672239B - A kind of monitoring device deformed for karst region and goaf railway bed ground collapse - Google Patents
A kind of monitoring device deformed for karst region and goaf railway bed ground collapse Download PDFInfo
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- CN105672239B CN105672239B CN201610040151.9A CN201610040151A CN105672239B CN 105672239 B CN105672239 B CN 105672239B CN 201610040151 A CN201610040151 A CN 201610040151A CN 105672239 B CN105672239 B CN 105672239B
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- railway bed
- top plate
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Analytical Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a kind of monitoring device deformed for karst region and goaf railway bed ground collapse, including inductance type strain gauge and inductance type transducer tester, inductance type strain gauge includes top test device, middle part connecting rod, lower fastening device and ring flange；Karst cave top plate or mined out hole top plate can drive induction coil synchronously sedimentation when settling；Railway bed can drive the magnet synchronously to settle when settling；When the sedimentation that railway bed is produced is different from the sedimentation that karst cave top plate or mined out hole top plate are produced, magnet mutually cuts generation electric current with induction coil, is the sedimentation difference that can obtain karst cave top plate or mined out hole top plate and railway bed by inductance type transducer tester.The device is located between railway bed bottom and ground, is interfered without that through railway bed, can avoid filling generation with railway bed in work progress, and does not influence the globality of railway bed and track, and the safe operation of train is not influenceed.
Description
Technical field
The invention belongs to foundation deformation monitoring technical field, more particularly, to karst region and goaf railway bed
The monitoring of base collapse-deformation.
Background technology
China is vast in territory, and complex geologic conditions are various, unavoidable when railway bed is built to pass through givey rock
Molten area and goaf.Although being handled using certain foundation stabilization measure, due to karsts developing area and small-sized mined out hole distribution
Erratic behavior, still suffer from the possibility collapsed.When ground is collapsed, cause top railway bed to lose support generation and collapse,
So as to cause railway bed to occur differential settlement, the ride comfort of railway is influenceed, the safe operation of train is influenceed when serious.Cause
This, railway bed work point higher to classification of rail or important is necessary to carry out ground collapse observation, according to collapsing situation
Take necessary measure to punish in time, prevent further harm.
The patent of invention CN103276755B announced provides a kind of railway raft foundation bottom soil body void that is used for and become
The monitoring device of shape, including the steel plate arranged positioned at raft plate lower horizontal, steel plate bottom surface, which is provided with, is anchored in steel plate below raft plate
Foundation soil in anchor pole, steel plate top surface, which is fixed with outside the inner side reinforcing bar being vertically arranged, inner side reinforcing bar, to be arranged with and raft plate is overall
Pour and be arranged with the outside pillar being fixed in embankment outside the raft slab pipe being vertically arranged together, raft slab pipe.The monitoring
Device is measured using slide measure, although precision is high, due to train continuous service during operation, is difficult to realize artificial survey
Amount, and influenceed by measurement peopleware, weather etc., measurement quality is difficult to ensure.Furthermore, steel pipe and outside pillar need to run through railway
Roadbed and upper track etc., fill to be also easy to produce and interfere in work progress with railway bed, and inevitably influence railway
The globality of roadbed and track, is likely to form hidden danger when serious.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the present invention proposes a kind of for karst region and goaf iron
The monitoring device of road roadbed ground collapse deformation, the device should avoid the problem of manual measurement is difficult, ensure measurement essence again
The safe operation of degree and train, while requiring not influenceing the globality of structure.
To achieve the above object, it is proposed, according to the invention, be used for karst region there is provided one kind and goaf railway bed ground collapses
The monitoring device of notch distortion, it is characterised in that including inductance type strain gauge and inductance type transducer tester, the inductance type should
Becoming meter includes top test device, middle part connecting rod, lower fastening device and ring flange, wherein,
The lower fastening device is fixedly connected on karst cave top plate or mined out hole top plate；
The middle part connecting rod is hollow structure and its upper and lower end is open, and it is vertically arranged and lower end is fixedly connected
On the lower fastening device；
The ring flange is fixed on railway bed, and it is located at the top of the middle part connecting rod and is connected with the middle part
There is spacing between bar, wherein, the railway bed is located at the top of the karst cave top plate or mined out hole top plate；
The top test device includes induction coil and magnet, and the induction coil is vertically arranged and is fixedly connected on
On the inwall of the middle part connecting rod, the karst cave top plate or mined out hole top plate can drive the middle part when settling
Connecting rod and the induction coil are synchronously settled；The upper end of the magnet is fixedly connected on the ring flange, and its lower end is stretched into
In the induction coil, the railway bed can drive the magnet synchronously to settle when settling；
The inductance type transducer tester is connected by wire with the induction coil；
The sedimentation of the sedimentation of railway bed and/or karst cave top plate or mined out hole top plate can make magnet and induction coil phase
Mutually cutting produces electric current, is that can obtain railway bed to push up with karst cave top plate or mined out hole by inductance type transducer tester
The sedimentation difference of plate.
Preferably, the top test device also includes being used for protecting the bellows of induction coil, the bellows it is upper
End is fixedly connected on the ring flange, and its lower end is stretched into the induction coil, and the ripple is stretched into the lower end of the magnet
In pipe.
Preferably, the lower fastening device includes bolt and reinforcing bar group, and the bolt is vertically arranged and its upper end spiral shell
Line connects the lower end of the middle part connecting rod, and the reinforcing bar group includes many reinforcing bars and every reinforcing bar is welded on the bolt
Outside.
Preferably, every reinforcing bar carries out bending processing, and it includes the first bending end and the second bending end, first folding
Bent-up end is fixedly connected on the outside of the bolt, and the second bending end is upturned.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
(1) inductance type transducer tester of the invention can be arranged on beyond railway bed closed-loop, not by circuit
Closing, train operation amount be big and influence of space limitation, can be observed at any time.
(2) present invention carries out reading using inductance type transducer tester to ground collapse-deformation data value, is not measured
Peopleware, atmospheric and climatic factors etc. influence, and measurement quality is readily obtained guarantee.
(3) present invention is located between railway bed bottom and karst cave or mined out hole, without that through railway bed, can keep away
Exempt to fill generation with railway bed in work progress and interfere, and do not influence the globality of railway bed and track, do not influence
The safe operation of train.
Brief description of the drawings
Fig. 1 is structural representation of the present invention in rail support structures；
The structural representation that Fig. 2 is stretched into the connecting rod of middle part for the top test device in the present invention；
Fig. 3 is the structural representation of the lower fastening device in the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not constituting conflict each other can just be mutually combined.
1~Fig. 3 of reference picture, a kind of monitoring device deformed for karst region and goaf railway bed ground collapse, bag
Inductance type strain gauge 1 and inductance type transducer tester are included, the inductance type strain gauge 1 includes top test device 1.1, middle part
Connecting rod 1.2, lower fastening device 1.3 and ring flange 1.4, wherein,
The lower fastening device 1.3 is fixedly connected on karst cave top plate or mined out hole top plate 7；
The middle part connecting rod 1.2 is hollow structure and its upper and lower end is open, and it is vertically arranged and lower end is fixed and connected
It is connected on the lower fastening device 1.3；
The ring flange 1.4 is fixed on railway bed 5, its be located at the middle part connecting rod 1.2 top and with it is described
There is spacing between middle part connecting rod 1.2；
It is vertical that the top test device 1.1 includes magnet 1.1.1 and induction coil 1.1.2, the induction coil 1.1.2
Set and be fixedly connected on the inwall of the middle part connecting rod 1.2, the karst cave or mined out hole 8 are when collapsing
Top plate 7 can be made to produce sedimentation, so as to can also drive the middle part connecting rod 1.2 and the induction coil 1.1.2 synchronously to settle；Institute
State that magnet 1.1.1 is vertically arranged and its upper end is fixedly connected on the ring flange 1.4 and itself and the middle part connecting rod
There is spacing between 1.2, its lower end is stretched into the induction coil 1.1.2, the railway bed 5 can drive when settling
The magnet 1.1.1 is synchronously settled；
The inductance type transducer tester is connected by wire 1.5 with the induction coil 1.1.2；
The sedimentation of railway bed 5 and/or karst cave or collapsing for mined out hole 8 can make magnet 1.1.1 and induction coil
1.1.2 mutually cutting produces electric current, by inductance type transducer tester be can obtain the top plate in karst cave or mined out hole 8 with
The sedimentation difference of railway bed 5.
Further, the inductance type strain gauge 1 also includes the bellows 1.1.3 for being used to protect induction coil 1.1.2, described
Bellows 1.1.3 upper end is fixedly connected on the ring flange 1.4, and its lower end is stretched into the induction coil 1.1.2, described
Magnet 1.1.1 lower end is stretched into the bellows 1.1.3.
Further, the lower fastening device 1.3 includes bolt 1.3.1 and reinforcing bar group, and the bolt 1.3.1 is vertically arranged
And its upper end is threaded in the lower end of the middle part connecting rod 1.2, the reinforcing bar group includes many reinforcing bar 1.3.2 and every
Root reinforcing bar 1.3.2 is welded on the outside of the bolt 1.3.1.
In addition, every reinforcing bar 1.3.2 carries out bending processing, it includes the first bending end and the second bending end, described
One bending end is fixedly connected on the outside of the bolt 1.3.1, and the second bending end is upturned.
When mounted, Specific construction process is as follows by the present invention：
(1) smooth location, carries out necessary basement process according to foundation condition, according to design attitude, size etc., can press
Drilling 2 is formed on contracting stratum 6.
(2) middle part connecting rod 1.2 is threadedly coupled by bolt 1.3.1, welded reinforcement will be carried on request in drilling 2
1.3.2 karst cave top plate or the mined out top of hole top plate 7 are fixed on bolt 1.3.1 steel pipe, from foot of hole from the bottom up
Cement injection mortar 4 and medium coarse sand 3 are backfilled successively.
(3) magnet 1.1.1 and induction coil 1.1.2 is installed successively and draws wire 1.5 from top, vertically to electricity
The formation top test device 1.1 of sense formula strain gauge top mounting flange 1.4.
(4) placement in layers railway bed 5, it is by inductance type transducer tester that the test of inductance type strain gauge 1 is initial
Value is set to zero, after debugging is finished.
The middle part connecting rod 1.2 of the present invention is made using stainless steel tube, filling medium coarse sand in space between its outer wall and drilling 2
3, the space filling concrete mortar 4 between the bolt 1.3.1 outer walls of lower fastening device 1.3 and drilling 2.Bellows 1.1.3 is set
Be placed in induction coil 1.1.2 outside, act to protect induction coil 1.1.2, middle part connecting rod 1.2 and ring flange 1.4 it
Between there is spacing, so that the bellows 1.1.3 for having certain length therebetween exposes the middle part connecting rod 1.2 so that
Allow magnet 1.1.1 to occur certain sedimentation in the presence of the load of railway bed 5, prevent karst cave or mined out hole 8 from not sending out
During raw collapse-deformation, inductance type strain gauge 1 is because of the excessive generation flexural deformation of stress.
The lower fastening device 1.3 of inductance type strain gauge 1 is made up of bolt 1.3.1 and reinforcing bar 1.3.2, reinforcing bar 1.3.2's
Second bending end is placed up the crotch-shaped tilted, and its first bending end is welded in the stainless steel steel of bolt 1.3.1 bottoms
On the outside of pipe, karst cave top plate or mined out hole top plate 7 are anchored in jointly with the cement mortar 4 of foot of hole, for preventing karst
Solution cavity or mined out hole 8 occur monitoring device during collapse-deformation and depart from bottom plate, and lower fastening device 1.3 is by bolt 1.3.1 with
Portion's connecting rod 1.2 is connected, when collapse-deformation occurs for karst cave or mined out hole 8, drives lower fastening device 1.3, middle part connection
Synchronous deformation occurs for bar 1.2 and test lead induction coil 1.1.2, and induction coil 1.1.2 mutually cuts production with magnet 1.1.1 magnetic fields
Raw electric current, displacement signal is converted to by demarcating conversion.Lower fastening device 1.3 can factorial praluction, top set screw thread with
Portion's connecting rod 1.2 is connected, and is easy to site operation and installation.
Drilling 2 is that this monitoring device provides installing space, in drilling 2 from bottom to top back-filling in layers cement mortar 4 with slightly
Sand 3, plays fixed magnet 1.1.1 and induction coil 1.1.2, prevents inductance type strain gauge 1 from producing flexural deformation.
Magnet 1.1.1 and induction coil 1.1.2 are mutually cut generation current signal and are transferred to convenient test by wire 1.5
At cable port guard box, deformation data value is read by inductance type transducer tester.
The collapse-deformation monitoring device can both realize the monitoring of the sedimentation and deformation of railway bed 5, can realize again karst cave or
The monitoring of the mined out collapse-deformation of hole 8, each situation is as follows：
1) when sedimentation and deformation occurs for railway bed 5, lower fastening device 1.3 is fixed, and test lead 1.1 is settled downwards
Generation compression, the testable maximum railroad bed settlement deflection of the collapse-deformation monitoring device is middle part connecting rod
The bellows 1.1.3 reserved between 1.2 and ring flange 1.4 total length.
2) when collapse-deformation occurs for karst cave or mined out hole 8, the bottom that ring flange 1.4 is fixed on railway bed 5 makes
Inductance type strain gauge top is fixed, and inductance type strain gauge bottom occurs collapse-deformation with karst cave or mined out hole 8 and produced
Raw stretcher strain.
3) when railway bed 5 and karst cave or mined out hole 8 deform and the deflection of the two is inconsistent, magnetic
Occurs relative motion between both iron 1.1.1 and induction coil 1.1.2.
Above-mentioned three kinds of situations can make magnet 1.1.1 and induction coil 1.1.2 mutually cut generation electric current, and pass through wire
1.5 are transferred to current signal at the cable port guard box of convenient test, by inductance type transducer tester by sedimentation and deformation
Or collapse-deformation data value is read.By the change curve and rule of analyzing deformation data, it can be determined that karst cave is adopted
Specific deflection when the state in cavity 8 is collapsed, and then take necessary measure to punish in time according to the situation that collapses, prevent
Produce further harm.
Inductance type strain gauge is fixed on the top plate 7 in karst cave or mined out hole 8 by the present invention, when karst cave or mined out
When collapse-deformation occurs for hole 8, magnet 1.1.1 and induction coil 1.1.2 mutually cut generation electric current, and by wire 1.5 by electricity
Stream signal is transferred at the cable port guard box of convenient test, is read sedimentation and deformation data value by inductance type transducer tester
Go out.The device to test digital independent is arranged on beyond railway bed closed-loop, not big and empty by closure of track, train operation amount
Between the influence that limits, can be observed at any time；The device is carried out using inductance type transducer tester to sedimentation and deformation data value
Reading, is not influenceed, quality is readily obtained guarantee by measurement peopleware, atmospheric and climatic factors etc., while the device is located at railway
Between roadbed bottom and ground, without through railway bed, it is to avoid fill generation with railway bed in work progress and interfere
And the globality of railway bed and track is not influenceed, the safe operation of train is not influenceed.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (4)
1. a kind of monitoring device deformed for karst region and goaf railway bed ground collapse, it is characterised in that including electricity
Sense formula strain gauge and inductance type transducer tester, the inductance type strain gauge include top test device, middle part connecting rod, under
Portion's fixing device and ring flange, wherein,
The lower fastening device is fixedly connected on karst cave top plate or mined out hole top plate；
The middle part connecting rod is hollow structure and its upper and lower end is open, and it is vertically arranged and lower end is fixedly connected on institute
State on lower fastening device；
The ring flange is fixed on railway bed, its be located at the middle part connecting rod top and with the middle part connecting rod it
Between there is spacing, wherein, the railway bed is located at the top of the karst cave top plate or mined out hole top plate；
The top test device includes induction coil and magnet, and the induction coil is vertically arranged and is fixedly connected on described
On the inwall of middle part connecting rod, the karst cave top plate or mined out hole top plate can drive the middle part to connect when settling
Bar and the induction coil are synchronously settled；The upper end of the magnet is fixedly connected on the ring flange, and its lower end is stretched into described
In induction coil, the railway bed can drive the magnet synchronously to settle when settling；
The inductance type transducer tester is connected by wire with the induction coil；
The sedimentation of the sedimentation of railway bed and/or karst cave top plate or mined out hole top plate can be such that magnet is mutually cut with induction coil
Generation electric current is cut, is that can obtain railway bed and karst cave top plate or mined out hole top plate by inductance type transducer tester
Settle difference.
2. a kind of monitoring dress deformed for karst region and goaf railway bed ground collapse according to claim 1
Put, it is characterised in that the top test device also includes the bellows for being used to protect induction coil, the upper end of the bellows
It is fixedly connected on the ring flange, its lower end is stretched into the induction coil, the bellows is stretched into the lower end of the magnet
It is interior.
3. a kind of monitoring dress deformed for karst region and goaf railway bed ground collapse according to claim 1
Put, it is characterised in that the lower fastening device includes bolt and reinforcing bar group, the bolt is vertically arranged and its threaded upper ends
The lower end of the middle part connecting rod is connected, the reinforcing bar group includes many reinforcing bars and every reinforcing bar is welded on the bolt
Outside.
4. a kind of monitoring dress deformed for karst region and goaf railway bed ground collapse according to claim 3
Put, it is characterised in that every reinforcing bar carries out bending processing, it includes the first bending end and the second bending end, first folding
Bent-up end is fixedly connected on the outside of the bolt, and the second bending end is upturned.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610040151.9A CN105672239B (en) | 2016-01-21 | 2016-01-21 | A kind of monitoring device deformed for karst region and goaf railway bed ground collapse |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610040151.9A CN105672239B (en) | 2016-01-21 | 2016-01-21 | A kind of monitoring device deformed for karst region and goaf railway bed ground collapse |
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| CN105672239A CN105672239A (en) | 2016-06-15 |
| CN105672239B true CN105672239B (en) | 2017-09-12 |
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Families Citing this family (4)
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| CN107313305B (en) * | 2017-07-06 | 2018-12-14 | 中铁第一勘察设计院集团有限公司 | The processing method of type sinkhole is lain concealed under the railway bed of karst area |
| CN107767625A (en) * | 2017-10-23 | 2018-03-06 | 山西省交通科学研究院 | A kind of highway goaf subgrade stability monitoring and pre-warning system and method |
| CN108049328B (en) * | 2017-12-26 | 2023-12-26 | 山西路桥第一工程有限责任公司 | Highway collapse early warning device and early warning method thereof |
| CN115682888B (en) * | 2022-10-30 | 2023-05-23 | 山东省地质矿产勘查开发局第七地质大队（山东省第七地质矿产勘查院） | Karst monitoring devices that sinks |
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