Tunnel vault based on shield duct piece deforms automatic monitoring systemTechnical field
The invention belongs to tunneling and underground engineering technical fields, more particularly to a kind of tunnel vault based on shield duct pieceDeform automatic monitoring system.
Background technique
In recent years, it is carried forward vigorously with the rapid development of our country's economy with urban construction, China's Forecast of Urban Traffic Flow is bigWidth rises, and traffic jam, urban environment worsening become the generally existing and urgently to be resolved major issue in each big city, citySubway rapidly becomes the head that many big cities solve traffic problems as a kind of traffic form safely, quickly, efficiently, environmentally friendlyIt selects.With greatly developing for China's city underground, shield method as it is safe and environment-friendly, quickly build means, in subway tunnelRoad is widely applied in building.
However shield method will cause the excavation face soil body and be disturbed and keep the soil body mobile, cause in front of shield in constructionGround settlement or protuberance destroy soil structures.Either settling or swelling all can generate unfavorable shadow to the safety of constructing tunnelIt rings.The instant displacement that shield-tunneling construction generates can be measured and be controlled at that time, and later long-term stratum deformation of constructing isOne complexity, uncontrollable system engineering.
With the rapid development of Fibre Optical Communication Technology, the application of optical fiber sensing monitoring is also further extensive.Currently, Fibre Optical SensorThe research of device improves and on the basis of using existing fiber sensing technology abundant, towards multifunction, miniaturization, integrateChange, intelligence, networking, systematization direction develop.It due to the bandwidth of optical fiber, can be used for remote measuring and controlling, be a kind of goodSensing element；Simultaneously because optical fiber sheet is thin compared with plain conductor, light-weight as nonmetallic, electromagnetism interference, diameter, capacity is specialGreatly, bending radius is small, radiation resistance, is especially useful for using under harmful environment；With Noninvasive, high sensitive.UsingDistributed sensing fiber technology, being capable of the solid comprehensive monitoring to section of jurisdiction crown displacement.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provide a kind of tunnel vault deformation based on shield duct piece fromDynamicization monitoring system can be effectively solved shield tunnel safety monitoring problem mainly for developing one kind, especially to tunnelCrown displacement carries out real-time monitoring problem,
The technical solution adopted by the invention is as follows:
A kind of tunnel vault based on shield duct piece of the present invention deforms automatic monitoring system, including the connection of several shield duct piecesMade of shield tunnel, control centre and prior-warning device；Shield duct piece radially inside, the side wall arcuate directions of shield duct piece radial directionSkeleton is set between adjacent shield duct piece, skeleton is the reticular structure that transverse steel and longitudinal reinforcement are mutually perpendicular to composition,It plays a supportive role, planform is identical as shield duct piece shape, arc-shaped；It is S-type on the skeleton of shield duct piece radially insideLay section of jurisdiction displacement sensing optical cable A, S-type laying section of jurisdiction displacement sensing optical cable on the skeleton of the arcuate directions of shield duct piece side wallB；The position between adjacent shield duct piece and S-type along the skeleton of the arcuate directions of side wall is arranged in top plate displacement optical cableIt lays；Reserved channel of the cable exit as Segment displacement sensing optic cable A is arranged in shield duct piece bottom；Axially prolong along shield tunnelIt stretches and lays section of jurisdiction displacement sensing optical cable C on the top plate of shield tunnel vault and in shield duct piece seam crossing setting Segment displacement biographySensing optical cable D；
Segment displacement sensing optic cable A, Segment displacement sensing optic cable B, Segment displacement sensing optic cable C, Segment displacement sensing optic cable D andThe other end of top plate displacement optical cable is directly connected with control centre；Control centre will be by Segment displacement sensing optic cable A, section of jurisdictionThe shield tunnel change in displacement of displacement sensing optical cable B, Segment displacement sensing optic cable and seam crossing Segment displacement sensing optic cable D transmittingData are analyzed and processed to control centre, and are compared according to the empirical data of setting, judge whether there is danger, thenPrior-warning device, which is passed to, by communications optical cable carries out early warning.
Further, the outside of shield tunnel includes the bottom plate of the arc of shield tunnel lower semicircular shape, is located at shield tunnelThe top plate of road vault and in shield tunnel two sides be in symmetrical two side plates, be bolted between three agree with into it is completeCircle.
Further, the Segment displacement delta data includes: described in sensing with the Segment displacement sensing optic cable CCrown displacement situation of change data, the seam crossing change in displacement situation sensed with described two side plates displacement optical cable segment DData, the top plate change in displacement data sensed with top plate displacement optical cable, Segment displacement sensing optic cable A experiences describedThe tunnel side plate change in displacement situation data that side plate interior sides displacement monitoring, Segment displacement sensing optic cable B are sensed.
When shield tunnel is somewhither locally deformed with, section of jurisdiction vault can be detected with seam crossing displacement sensing optical cableThe approximate location of local deformation, be located remotely from be laid in the top plate of shield tunnel diameter on skeleton top plate displacement optical cable segment,Generation part can be determined with two side plates displacement optical cable segment on two between the bottom plate and top plate side plate inner frameThe specific location of destruction, i.e., specifically shield tunnel region corresponding to which block shield duct piece is destroyed.
Beneficial effects of the present invention:
Effect and advantage of the invention is that high-efficient, easy to operate, more existing shield tunnel safety monitoring technology becomes vaultShape specific aim is stronger, monitoring when do not influenced by tunnel internal construction, can long-term automatic monitoring, the accurate complete, precision of dataHigh, reduction manpower, monitoring mode are safe and reliable.
Detailed description of the invention
Fig. 1 is that the present invention is based on the tunnel vaults of shield duct piece to deform automatic monitoring system structural schematic diagram;
Fig. 2 is the structural schematic diagram of the corresponding section of jurisdiction of each ring of shield tunnel；
Fig. 3 is shield tunnel displacement sensing optical cable layout diagram.
In figure, 1 is shield duct piece；2 be skeleton；3 be Segment displacement sensing optic cable A；4 be Segment displacement sensing optic cable B；5For cable exit；6 be control centre；7 be communications optical cable；8 be prior-warning device；9 be bottom plate；10 be top plate；11 be side plate；12 areTop plate is displaced optical cable；13 be Segment displacement sensing optic cable C；14 be Segment displacement sensing optic cable D.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples:
Embodiment: as shown in Figure 1-3, a kind of tunnel vault based on shield duct piece of the present invention deforms automatic monitoring system, packetInclude shield tunnel, control centre 6 and prior-warning device 8 that several shield duct pieces 1 are formed by connecting；Shield duct piece 1 radially inside, shieldSkeleton 2 is set between the radial side wall arcuate directions in structure section of jurisdiction 1 and adjacent shield duct piece 1, and skeleton 2 is transverse steel and longitudinal directionReinforcing bar is mutually perpendicular to the reticular structure of composition, plays a supportive role, planform is identical as 1 shape of shield duct piece, arc-shaped；ShieldS-type laying section of jurisdiction displacement sensing optical cable A3 on the skeleton 2 of structure section of jurisdiction 1 radially inside, the arcuate directions of 1 side wall of shield duct pieceS-type laying section of jurisdiction displacement sensing optical cable B4 on skeleton 2 lays section of jurisdiction displacement sensing optical cable A3 and Segment displacement sensing optic cable B4When, it should be straightened, give certain prestressing force, be then fixed on skeleton 2 with band；Top plate is displaced optical cable 14 and is arranged adjacentShield duct piece 1 between position and the S-type laying along the skeleton of the arcuate directions of side wall 2；The setting of 1 bottom of shield duct pieceFlexible seals can be used to it when without detection in reserved channel of the cable exit 5 as Segment displacement sensing optic cable A3Carry out blocking closing；Along the axially extending section of jurisdiction displacement sensing optical cable C12 that lays of shield tunnel in the top plate 10 of shield tunnel vaultAbove and in 1 seam crossing of shield duct piece Segment displacement sensing optic cable D13 is set；
Segment displacement sensing optic cable A3, Segment displacement sensing optic cable B4, Segment displacement sensing optic cable C12, Segment displacement sense lightThe other end of cable D13 and top plate displacement optical cable 14 is directly connected with control centre 6；Control centre 6 will be passed by Segment displacementSensing optical cable A3, Segment displacement sensing optic cable B4, crown displacement sensing optic cable 12 and seam crossing Segment displacement sensing optic cable D13 transmittingShield tunnel change in displacement data be analyzed and processed to control centre 6, and be compared, sentenced according to the empirical data of settingDisconnected then to pass to the progress early warning of prior-warning device 8 by communications optical cable 7 with the presence or absence of danger, danger here refers mainly to be displacedIn the case where may collapsing greatly, so needing to carry out early warning to it.
The outside of shield tunnel includes the bottom plate 9 of the arc of shield tunnel lower semicircular shape, positioned at shield tunnel vaultTop plate 10 and in shield tunnel two sides be in symmetrical two side plates 11, is bolted between three and agrees with into complete circleShape.
The Segment displacement delta data includes: the vault position sensed with the Segment displacement sensing optic cable C12Situation of change data are moved, the seam crossing change in displacement situation data sensed with described two side plates displacement optical cable segment D13,The top plate change in displacement data sensed with top plate displacement optical cable 14, the side that Segment displacement sensing optic cable A3 is experiencedThe tunnel side plate change in displacement situation data that displacement monitoring, Segment displacement sensing optic cable B4 are sensed on the inside of plate.
When shield tunnel is somewhither locally deformed with, section of jurisdiction vault can be monitored with seam crossing displacement sensing optical cable 6The approximate location of local deformation out is laid in the section of jurisdiction on skeleton 2 in the top plate 10 for being located remotely from shield tunnel diameter in Fig. 2Two side plate sections of jurisdiction on displacement sensing optical cable C12 and two between bottom plate 9 and top plate 10 side plate, 11 inner frame 2Displacement sensing optical cable B4 can determine the specific location that local failure occurs, i.e., shield corresponding to which specific block shield duct piece 1Structure tunnel area destroys.
In addition, in the present embodiment, control centre 6 is first obtained based on Tunnel Displacement information in order to reduce processing workloadTunnel Displacement situation of change data, in the case that Tunnel Displacement situation of change exceeds change in displacement setting value at judgement, into oneIt walks the tunnel location information according to corresponding to Tunnel Displacement situation of change data and determines the multiple shield duct pieces being located at the position1, it is then based on corresponding Segment displacement information and obtains these 1 change in displacement situation data of shield duct piece, then control centre 6 is againShield duct piece 1 is judged one by one, it is final to determine the corresponding shield duct piece 1 in damaged area and its clear position.
Setting in this way, Segment displacement sensing optic cable can monitor the shield in shield tunnel construction and operational processSection of jurisdiction itself arch deformation.