CN106649912A - Settlement prediction method for metro tunnel shield undercrossing existing railway facilities - Google Patents
Settlement prediction method for metro tunnel shield undercrossing existing railway facilities Download PDFInfo
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Abstract
The invention provides a settlement prediction method for metro tunnel shield undercrossing existing railway facilities. The method comprises the steps of using ABAQUS software in the finite element software to establish a three-dimensional calculation model of a soil-layer-subgrade-railway structure, calculating a vertical settlement displacement of the existing railway foundation and track, arrangingactual undercrossing construction materials of subway tunnel site including geological conditions, construction methods, section forms and dimensions, buried depth, settlement control indexes during construction and actually measured settlement data, combining the results of numerical analysis, summarizing the influence rules of deformation caused by the excavation work in the metro tunnel undercrossing construction to the existing railway foundation and track, making the comparison between the predicted value and the settlement control index stipulated in the existing railway deformation control index system in construction engineering, and based on the comparison results, adjusting shield parameters, excavation methods and excavation depth. The settlement prediction method for metro tunnel shield undercrossing existing railway facilities can in advance take corresponding reasonable shield parameters for tunnel excavation, and implement technical control measures of the settlement of surface facilities and settlement monitoring and control techniques.
Description
Technical field
The present invention relates to a kind of settlement prediction method.Existing railway facility is worn under more particularly to a kind of subway tunnel shield
Settlement prediction method.
Background technology
In recent years, urban track traffic has been enter into great development period, and there has been the subway in 28 cities in current China
Construction project is given an written reply, and urban track traffic with its quick, safety, the huge advantage of low-carbon (LC) is doomed that going out for the people will be changed
Line mode, becomes the first-selection of people's trip mode.In the construction of the underground foundation facility such as urban subway in countries in the world,
Main Bian shield constructions.According to the Japanese statistics to main cities such as Tokyo, Osaka in 1991, total 75224 meters are extended
City tunnel engineering in, the ratio of Mining Method accounts for 6.1%, shield method and accounts for 60.9%, cut and cover method and accounts for 33%.Current 35 countries
The 290 underground railway circuits for being always about 6000km built with more than 80 city in area, are substantially applied using shield method
What work was completed.Shield is used as a kind of main underground space development technology, and shield method is applied widely with its；Mechanization degree
Height, speed of application is fast；Tunnel cross-section is accurate；The effect on environment time is shorter；Waterproof construction is convenient, the advantages of quality is preferable
It is used widely in each metro construction of China.
To meet the trip needs of the people, urban track traffic becomes city rail with the own Jing that is connected of other modes of transportation
Significant consideration in traffic programme.Make passenger out of the station and change to the shortest path of other vehicles, most convenient, also
Jing becomes the Basic Design theory at state's iron station.At present direction of state's iron station all towards grade-separated traffic pattern is developed, with municipal administration friendship
It is logical to realize seamless connection.It is unreasonable due to the asynchronism on various public transports and state's iron station building time or planning
Property so that the increasing inevitable Xia Chuan states iron station of urban track traffic.Such as, the south using mining method construction in 2005
Nanjing Railway Station rail yard is worn under station in capital subway Line 1 Nanjing；Chengdu Metro Line 1 safflower-train northern station is interval within 2006
Chengdu train northern station is worn under shield tunnel；Wear under the Xian Huang villages railway station-Yi He village station shield interval Beijing Metro Daxing in 2009
Railway contact line tower, platform and awning, communication launching tower, station in 12 strands of Beijing-Shanghai in Huang Cun railway stations, capital nine etc. railway and station
Multiple constructions of structures such as station, station local police station；2011 older husky Line 2 Metro Jin Tai squares station Changsha Railway Station shields are interval
Under wear Beijing-Guangzhou Railway and Changsha Railway Station etc..
Newly-built or reconstructed railway is very prominent across the advantage of existing railway and highway using wearing under tunnel, but constructing tunnel
Inevitably disturbance is produced to existing railway and highway foundation, different degrees of stratum settlement will necessarily be produced, so as to draw
Play existing railway roadbed and track and existing highway subgrade and road surface is deformed, not only to construction of railways and the peace of surrounding enviroment
Have a negative impact entirely, and the safe operation of existing line can be affected, serious meeting causes the destruction of existing railway and highway,
Cause larger security incident and cause larger economic loss.Therefore, wear that existing road causes under railway tunnel heavy is studied
Existing railway is worn under drop deformation rule and tunnel, road interaction mechanism, science formulation newly built railway line and construction of the highway is drawn
The settlement Control standard for rising, is predicted by the sedimentation to wearing the earth's surface rail facility that existing railway causes under newly built railway line
Research, so as to take corresponding settlement Control technical measures and settlement monitoring control technology, to mitigate, eliminate and avoid due to applying
It is very necessary that work causes the adverse effect of ground settlement.China is in urban track traffic great development period, from now on will
Have more subway sectional tunnels and pass through existing state's iron station, the research of this respect is carried to the design of later similar engineering, construction
For important theoretical and practical advice.
The content of the invention
The technical problem to be solved is to provide a kind of design to engineering and construction has certain guidance meaning
Subway tunnel shield under wear the settlement prediction method of existing railway facility.
The technical solution adopted in the present invention is：The settlement prediction side of existing railway facility is worn under a kind of subway tunnel shield
Method, it is characterised in that comprise the steps：
1) soil layer-roadbed-railway structure Three-dimensional CAD is set up with the ABAQUS softwares in finite element software, is calculated
Existing railway basis and the Vertical Settlement displacement of track；
2) wear construction information under the live reality for arranging subway tunnel, including geological conditions, construction method, form of fracture and
Settlement control index and sedimentation actual measurement Value Data in size, buried depth and work progress；With reference to the result of numerical analysis, summary is returned
Tunnel excavation is received when wearing construction under subway tunnel to existing railway basis and the deformation effect rule of track；
3) the deformation effect rule according to tunnel excavation when construction is worn under subway tunnel to existing railway basis, and based on applying
Existing railway Deformation control index system is to staticaccelerator track physical dimension, the regulation of dynamic mass allowable deviation management in work engineering
Require, according to step 2) in when wearing construction under the subway tunnel that goes out of summary and induction tunnel excavation to existing railway basis and track
Deformation of the deformation effect rule to different edpth of tunnels, the existing railway basis of different digging modes and track is predicted, and leads to
Cross predicted value and contrasted based on settlement control index specified in existing railway Deformation control index system in construction work,
If predicted value exceedes settlement control index, shield parameter, digging mode and excavation buried depth are adjusted in turn, until
Meet Con trolling index requirement；If predicted value meets settlement control index, prediction is reasonable.
2. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 1,
Characterized in that, step 1) in soil layer-roadbed-line construction Three-dimensional CAD is set up will for different edpth of tunnels,
Different digging modes, carry out respectively numerical computations, analysis existing railway basis and rail to railway basis, the deformation of track and stress
The deformation rule in road.
3. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 2,
Characterized in that, described analysis existing railway foundation deformation rule includes：According to step 1) in obtain railway basis it is perpendicular
To sedimentation deformation, using origin mapping softwares the deformation curve that railway basis Vertical Settlement displacement is walked with construction and excavation is drawn.
4. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 2,
Characterized in that, the deformation rule of described track includes：According to step 1) in the track Vertical Settlement displacement that obtains, utilize
Origin mapping softwares draw the deformation curve that the displacement of track Vertical Settlement is walked with construction and excavation.
5. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 1,
Characterized in that, step 3) after the completion of, wear under subway tunnel in work progress, carry out that the laying of existing railway scene is installed manually
Or automatic monitoring equipment, the Vertical Settlement amount that the basis of existing railway in work progress and track are worn under is monitored, will supervise
Measured value and step 3) in predicted value be analyzed, when implement monitoring settling amount exceed the predicted value, then send report
It is alert, illustrate that predicted value is made a fault, then repeat step 1)～step 3)；Otherwise, then show that prediction is rational.
The settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield of the present invention, using numerical analysis with
Existing typical engineering examples are compared the mode verified, the existing iron that construction causes is worn under comprehensive induction and conclusion subway tunnel
Road facility deformation failure models, Settlement Deformation Rules, sedimentation and deformation affect, by wear under subway tunnel construction cause it is existing
Rail facility deformation numerical simulation result is predicted the settlement values scope of existing railway facility, so as to take corresponding conjunction in advance
The shield parameter of reason carries out tunnel excavation, earth's surface facility settlement Control technical measures and settlement monitoring control technology, to mitigate,
Eliminate and avoid because construction causes the adverse effect of ground settlement.
Description of the drawings
Fig. 1 is the Three-dimensional CAD schematic diagram of soil layer-roadbed-line construction；
Fig. 2 is roadbed monitoring point layout drawing；
Fig. 3 is finite element prediction and monitor value correlation curve；
Fig. 4 is double track tunnel and overall bedding, location of rail relation schematic diagram；
Fig. 5 is roadbed vertical deformation curve synoptic diagram；
Fig. 6 is rail vertical deformation curve synoptic diagram.
Specific embodiment
With reference to the sedimentation that existing railway facility is worn under a kind of subway tunnel shield of embodiment and accompanying drawing to the present invention
Forecasting Methodology is described in detail.
The settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield of the present invention to be had using large-scale general
Meta software ABAQUS is used as calculating instrument for limit, and the excavation tunneling process of shield is simulated using method of killing activating elements；The soil body is adopted
Mohr-Coulomb this structure simulations；With linear elasticity constitutive modeling concrete lining.The work progress of Shield tunnel can summarize
Excavate for working face, the assembled and several steps of shield tail space grouting filling of shield tail Lining Ring, working face excavate and lining cutting spelling
Fill alternately, until whole piece tunnel is completed.The simulation of stage excavation of the soil body is as follows：
(1) apply soil body deadweight and boundary constraint first, the supporting unit such as lining cutting, slip casting is removed, before obtaining tunnel excavation
Primary stress.
(2) according to the principle of Finite Element Method, with killing and activating corresponding unit come excavation simulation and Bracing Process, kill
Dead soil body unit, activation lining element and slip casting unit.
The settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield of the present invention, following step is specifically included
Suddenly：
1) soil layer-roadbed-railway structure Three-dimensional CAD is set up with the ABAQUS softwares in finite element software, is calculated
Existing railway basis and the Vertical Settlement displacement of track；
In will be for different edpth of tunnels, different excavation sides in soil layer-roadbed-line construction Three-dimensional CAD is set up
Formula, carries out numerical computations to railway basis, the deformation of track and stress respectively, analyzes the deformation rule of existing railway basis and track
Rule.Wherein,
Described analysis existing railway foundation deformation rule includes：According to step 1) in obtain railway basis it is vertical heavy
Decrease is moved, and using origin mapping softwares the deformation curve that railway basis Vertical Settlement displacement is walked with construction and excavation is drawn.
The deformation rule of described track includes：According to step 1) in the track Vertical Settlement displacement that obtains, utilize
Origin mapping softwares draw the deformation curve that the displacement of track Vertical Settlement is walked with construction and excavation.
2) wear construction information under the live reality for arranging subway tunnel, including geological conditions, construction method, form of fracture and
Settlement control index and sedimentation actual measurement Value Data in size, buried depth and work progress；With reference to the result of numerical analysis, summary is returned
Tunnel excavation is received when wearing construction under subway tunnel to existing railway basis and the deformation effect rule of track；
3) the deformation effect rule according to tunnel excavation when construction is worn under subway tunnel to existing railway basis, and based on applying
Existing railway Deformation control index system is to staticaccelerator track physical dimension, the regulation of dynamic mass allowable deviation management in work engineering
Require, according to step 2) in when wearing construction under the subway tunnel that goes out of summary and induction tunnel excavation to existing railway basis and track
Deformation of the deformation effect rule to different edpth of tunnels, the existing railway basis of different digging modes and track is predicted, and leads to
Cross predicted value and contrasted based on settlement control index specified in existing railway Deformation control index system in construction work,
If predicted value exceedes settlement control index, shield parameter, digging mode and excavation buried depth are adjusted in turn, until
Meet Con trolling index requirement；If predicted value meets settlement control index, prediction is reasonable.
Step 3) after the completion of, in order to verify to the accuracy of predicted value in the process of the present invention, under subway tunnel
In wearing work progress, carry out that laying manual or automaticization monitoring device in existing railway scene is installed, wear under in work progress both
Have railway basis and the Vertical Settlement amount of track to be monitored, by monitor value and step 3) in predicted value be analyzed,
When the settling amount for implementing monitoring exceedes the predicted value, then warning is sent, illustrates that predicted value is made a fault, then repeat step 1)～
Step 3)；Otherwise, then show that prediction is rational.
The contrast of the subgrade deformation characteristic parameter be given by Fig. 3 --- roadbed vertical deformation predicted value and real-time monitoring value
Remove curve it is seen that：It is proposed by the present invention by finite element numerical simulation according to different buried depth, different digging mode and shield
The settlement prediction method that existing railway facility is worn under a kind of subway tunnel shield that structure parameter draws has stronger applicability, root
According to actual conditions for the engineering of different arrangement and method for construction, more close numerical value budget result can be obtained.
Instantiation is given below：
(1) soil layer-roadbed-line construction Three-dimensional CAD is set up in this example, by taking No. 6 lines of Tianjin Underground as an example, such as
Shown in Fig. 1, double track tunnel is with overall bedding, location of rail relation as shown in figure 4, the selection that model calculates size mainly considers side
Boundary's effect, computational efficiency and calculating speed.The value reference of tunnel cross-section, concrete strength《Railway bed design specification》、《Ground
Iron design specification》Deng, soil constitutive model from the elastic-plastic model for meeting Mohr-Coulomb criterions.
(2) engineering data of Some Domestic urban subway tunnel undercrossing tunnel is compiled, the data collected mainly is wrapped
Include settlement calculation value and sedimentation measured value etc. in geological conditions, construction method, form of fracture and size, buried depth and work progress
Data.Collect down to wear construction geology condition and be mainly and wear construction method under earth tunnel, tunnel and applied with Mining Method and shield
Based on work method.Tunnel excavation is to existing railway basis and the deformation effect rule of track when construction is worn under summary and induction subway tunnel
Rule；
(3) with reference to numerical value simulation calculation and Practical Project data, tunnel is opened when summary and induction goes out under subway tunnel to wear construction
Dig the deformation effect rule to existing railway basis.When existent railway implementation is worn under subway tunnel, line tower foundation deformation and both
There is railway deformation rule consistent, the phenomenon of coming to nothing on basis and circuit can not be considered, before the Bei Dong rivers rising in Ningxia and flowing into central Shaanxi of excavation face distance line center 1 extremely
Settling amount behind the Bei Dong rivers rising in Ningxia and flowing into central Shaanxi of wire center 2 is about the 68% of total settlement.The basis of existing railway is along the heavy of line direction
Drop curve meets Gaussian curve distribution, and as shown in Figure 5, Figure 6, subway tunnel is buried for roadbed vertical deformation, track vertical deformation curve
When deep shallower, subsider shows as narrow and deep, and with the increase of subway tunnel buried depth, subsider shows as wide and shallow.
(4) manual or automaticization monitoring device is laid at existing railway scene, line table along the line in work progress is worn under
Face settling amount and sedimentation and deformation speed are monitored, and monitoring point arrangement can lay row's section, the section in the sleeper of circuit
Directly over Beijing-Shanghai Railway, six measuring points are arranged on section, respectively positioned at two tunnel axis and two side positions, as shown in Figure 2.
(5) monitor value is contrasted with the settlement prediction value, when the settling amount or sedimentation and deformation speed of real-time monitoring
It is more or less the same with predicted value, then it represents that above Forecasting Methodology applicability preferably, if difference is larger, is carried out in turn rationally excellent
Change.
The settlement prediction method of existing railway facility is worn under the subway tunnel shield that patent of the present invention is provided, for affiliated neck
For the those of ordinary skill in domain, the change or variation of other multi-forms can also be made on the basis of the above description.This
In all of embodiment cannot be exhaustive, it is every to belong to the obvious change that technical solution of the present invention is amplified out
Or change still in the present invention include within the scope of.
Claims (5)
1. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield, it is characterised in that comprised the steps：
1) soil layer-roadbed-railway structure Three-dimensional CAD is set up with the ABAQUS softwares in finite element software, is calculated existing
Railway basis and the Vertical Settlement displacement of track；
2) construction information, including geological conditions, construction method, form of fracture and chi are worn under the live reality for arranging subway tunnel
Settlement control index and sedimentation actual measurement Value Data in very little, buried depth and work progress；With reference to the result of numerical analysis, summary and induction
Tunnel excavation is to existing railway basis and the deformation effect rule of track when construction is worn under subway tunnel；
3) the deformation effect rule according to tunnel excavation when construction is worn under subway tunnel to existing railway basis, and based on construction work
Existing railway Deformation control index system will to the regulation of staticaccelerator track physical dimension, the management of dynamic mass allowable deviation in journey
Ask, according to step 2) in change of the tunnel excavation to existing railway basis and track when wearing construction under the subway tunnel that goes out of summary and induction
Deformation of the shape affecting laws to different edpth of tunnels, the existing railway basis of different digging modes and track is predicted, and passes through
Predicted value is contrasted with settlement control index specified in existing railway Deformation control index system in construction work is based on, if
Predicted value exceedes settlement control index, then to shield parameter, digging mode and excavate buried depth and be adjusted in turn, until full
Sufficient Con trolling index is required；If predicted value meets settlement control index, prediction is reasonable.
2. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 1, and it is special
Levy and be, step 1) in will be for different edpth of tunnels, difference in soil layer-roadbed-line construction Three-dimensional CAD is set up
Digging mode, carries out numerical computations to railway basis, the deformation of track and stress respectively, analyzes existing railway basic and track
Deformation rule.
3. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 2, and it is special
Levy and be, described analysis existing railway foundation deformation rule includes：According to step 1) in obtain railway basis it is vertical heavy
Decrease is moved, and using origin mapping softwares the deformation curve that railway basis Vertical Settlement displacement is walked with construction and excavation is drawn.
4. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 2, and it is special
Levy and be, the deformation rule of described track includes：According to step 1) in the track Vertical Settlement displacement that obtains, using origin
Mapping software draws the deformation curve that the displacement of track Vertical Settlement is walked with construction and excavation.
5. the settlement prediction method of existing railway facility is worn under a kind of subway tunnel shield according to claim 1, and it is special
Levy and be, step 3) after the completion of, wear under subway tunnel in work progress, carry out installing existing railway scene lay it is artificial or from
Dynamicization monitoring device, the Vertical Settlement amount that existing railway basis and track in work progress are worn under is monitored, by monitor value
With step 3) in predicted value be analyzed, when implement monitoring settling amount exceed the predicted value, then send warning, say
Bright predicted value is made a fault, then repeat step 1)～step 3)；Otherwise, then show that prediction is rational.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107562977A (en) * | 2017-07-04 | 2018-01-09 | 北京交通大学 | The Forecasting Methodology that construction causes existing tunnel to deform is worn under a kind of shield |
| CN107657091A (en) * | 2017-09-13 | 2018-02-02 | 河北建筑工程学院 | The computational methods of small interval heavy haul railway cross tunnel tunnel bottom displacement |
| CN107742032A (en) * | 2017-10-24 | 2018-02-27 | 浙江大学城市学院 | One kind is directed to soil deformation computational methods caused by the suction/discharge type shield tunneling of ground under shallow earthing operating mode |
| CN108491620A (en) * | 2018-03-20 | 2018-09-04 | 中铁七局集团郑州工程有限公司 | The degree of fitting method of inspection of subway tunnel crossing pile foundation and subgrade settlement prediction |
| CN108596376A (en) * | 2018-04-16 | 2018-09-28 | 青岛理工大学 | A kind of new constructing metro tunnel causes Ground surface settlement method |
| CN109145463A (en) * | 2018-08-27 | 2019-01-04 | 北京住总集团有限责任公司 | A kind of deformation analysis method for during tunnel excavation |
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| CN111259560A (en) * | 2020-02-04 | 2020-06-09 | 武汉轻工大学 | Shield construction ground surface settlement form classification method and system |
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| CN113062742A (en) * | 2021-03-23 | 2021-07-02 | 济南轨道交通集团有限公司 | Deformation control construction method for shield tunnel lower-passing high-speed railway bridge |
| CN113124826A (en) * | 2021-04-13 | 2021-07-16 | 中铁十四局集团有限公司 | Method for monitoring sedimentation |
| CN113361151A (en) * | 2020-03-06 | 2021-09-07 | 宏润建设集团股份有限公司 | Analysis and evaluation method for shield underpass construction |
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