CN106909715A - The girder construction Deformation Prediction control method of underground structure is worn under a kind of tunnel - Google Patents
The girder construction Deformation Prediction control method of underground structure is worn under a kind of tunnel Download PDFInfo
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- CN106909715A CN106909715A CN201710044538.6A CN201710044538A CN106909715A CN 106909715 A CN106909715 A CN 106909715A CN 201710044538 A CN201710044538 A CN 201710044538A CN 106909715 A CN106909715 A CN 106909715A
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- 238000010276 construction Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 36
- 238000004062 sedimentation Methods 0.000 claims abstract description 20
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 238000004088 simulation Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000011161 development Methods 0.000 claims description 4
- 230000000246 remedial effect Effects 0.000 claims description 3
- 238000004422 calculation algorithm Methods 0.000 description 5
- 230000036244 malformation Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
A kind of girder construction Deformation Prediction control method the present invention relates to wear underground structure under tunnel, comprises the following steps：1) carry out Large span tunnel to be excavated, at the scene monitoring point on the upper and lower cloth of girder construction, monitoring point is monitored and collection site Monitoring Data；2) girder construction is divided into 1~6 seven stage of sedimentation and posterior settlement of excavation, grasps each stage girder construction itself inclination；3) by numerical simulation calculation, and with live girder construction monitoring point identical place cloth on corresponding monitoring point, each construction stage is obtained to sedimentation, the percentage of girder construction itself obliquity effects, given respective corresponding control standard value is multiplied by with percentage, along with engineering analogy, comprehensive analysis obtains the control standard value of each construction stage；4) the control standard value of each construction stage obtained with step (3) using field measurement value is compared, and according to both real time contrasts in work progress, reaches the purpose of prediction girder construction slope deformation.
Description
【Technical field】
The present invention relates to a kind of Deformation Prediction method of girder construction, and in particular to wear the beam of underground structure under a kind of tunnel
Malformation forecast Control Algorithm, belongs to tunnel construction technical field.
【Background technology】
At present, increasing with major city underground engineering projects, particularly in surging big of current country's infrastructure
Under environment, the substantial amounts of underground tunnel project project of the urban planning such as Beijing, Shanghai, Tianjin, Nanjing, Guangzhou, Shenzhen, Xi'an.
Limited by existing building, surrounding enviroment, the phenomenon that existing building is worn under new subway tunnel is more and more universal.In order to true
The safety of building is protected, especially there is the safety of the building of girder construction, building settlement Characteristics of Development must be just studied, according to each
Construction stage takes corresponding control measure to the influence degree difference of building and girder construction.
General total settlement and the rate of settling mainly to building (such as beam) is controlled at present, but final settlement is arrived
Up to before stabilization, total settlement control method has certain risk to building safety.In order to strictly control the safety of girder construction, need
The deformation slope of girder construction is controlled, and the inclination slope of girder construction is resolved into each different stage and be become
Shape PREDICTIVE CONTROL, the final safety for ensureing girder construction.
Therefore, in order to solve the above technical problems, wearing the beam of underground structure under a kind of tunnel of innovation it is necessory to provide
Malformation forecast Control Algorithm, to overcome the defect of the prior art.
【The content of the invention】
To solve the above problems, it is an object of the invention to provide the girder construction deformation that underground structure is worn under a kind of tunnel
Forecast Control Algorithm, its deviation dynamic that can in time grasp measuring point displacement monitor value and design predicted value analyzes reason, in time
Treatment, it is to avoid the accumulation of girder construction risk, makes safe construction be in aggressive status.
To achieve the above object, the technical scheme taken of the present invention is：The girder construction of underground structure is worn under a kind of tunnel
Deformation Prediction control method, it includes following construction procedure：
1) many pilot tunnel Large span tunnels that the girder construction of underground structure, is worn under are excavated, and girder construction is upper and lower at the scene
Monitoring point on cloth, is monitored and collection site Monitoring Data to monitoring point；
2), by girder construction be divided into 1 excavation sedimentation, 2 excavation sedimentation, 3 excavation sedimentation, 4 open
The sedimentation of digging, 5 sedimentations excavated, 6 seven stages of sedimentation and posterior settlement excavated, grasp each stage girder construction itself
Inclined Characteristics of Development；
3), by numerical simulation calculation, and with live girder construction monitoring point identical place cloth on corresponding monitoring point,
Percentage of each construction stage on girder construction deformation slope influence is obtained, given respective corresponding control standard is multiplied by with percentage
Value, along with engineering analogy, comprehensive analysis obtains the control standard value of each construction stage；Wherein, girder construction deformation slope sets
It is set to beam left end vertical displacement ZCWith beam right-hand member vertical displacement ZDDifference and beam its length L ratio, as slope tan β=
(ZD-ZC)/L；Within -30mm, its inclination is that difference limit value is less than 0.002 to girder construction total settlement controlling value；
4) the control standard value of each construction stage for, being obtained with step (3) using field measurement value is compared, in construction
During according to both real time contrasts, reach the slope deformation of prediction girder construction.
The girder construction Deformation Prediction control method that underground structure is worn under tunnel of the invention is further：The step 1)
In, many pilot tunnel Large span tunnel excavation steps are：1 is first excavated, and is separated by 10m or so and is excavated 2 again, and 10m is separated by with 2 faces
Left and right excavates 3 again, and be separated by 10m or so with 3 faces excavates 4 again, and be separated by 10m or so with 4 faces excavates 5 again
Portion, is separated by 10m or so and excavates 6 again with 5 faces.
The girder construction Deformation Prediction control method that underground structure is worn under tunnel of the invention is further：The step 4)
In, the monitoring point chosen in numerical model should match with the monitoring point of live cloth；Determine in the control standard of each construction stage
In, numerical simulation calculation result accounts for 60%~70%, and other similar engineering experiences account for 30%~40%.
The girder construction Deformation Prediction control method that underground structure is worn under tunnel of the invention is also：The step 4) in,
Before being contrasted with controlling value, bad value is rejected；Field monitoring value will be with calculated value dynamic contrast；In the posterior settlement stage, pass through
Girder construction field monitoring data, feedback, Dynamic Construction, more than raft foundation stress, take follow-up reinforcing and remedial measure in time.
Compared with prior art, the present invention has the advantages that：
1) in overall displacement control amount being decomposed into each step construction stage, each step construction stage is made to have clearly change
Shape control targe, with very strong operability；
2) there is integrated planning to emphasis observation measuring point displacement control, the emphasis of Construction control can be specified, accomplish that what is had puts
Arrow；
3) the deviation dynamic of measuring point displacement monitor value and design predicted value is grasped in time, analyzes reason, in time treatment, it is to avoid
The accumulation of risk, makes safe construction be in aggressive status.
4) evaluation of stage can be carried out to the security of girder construction, reliability from the deformation slope of beam, it is ensured that beam
The safety of structure.
【Brief description of the drawings】
Fig. 1 is step 2 of the invention) after the completion of schematic diagram.
Fig. 2 is step 3 of the invention) the computation model figure of center sill structure slope.
【Specific embodiment】
Refer to shown in Figure of description 1 and accompanying drawing 2, the present invention becomes to wear the girder construction of underground structure under a kind of tunnel
Shape forecast Control Algorithm, it includes following construction procedure：
(1) many pilot tunnel Large span tunnels that the girder construction of underground structure is worn under are excavated, at the scene the upper and lower cloth of girder construction
Upper monitoring point, is monitored and collection site Monitoring Data to monitoring point.
(2) by girder construction be divided into 1 excavation sedimentation, 2 excavation sedimentation, 3 excavation sedimentation, 4 open
The sedimentation of digging, 5 sedimentations excavated, 6 seven stages of sedimentation and posterior settlement excavated, grasp the deformation of each stage girder construction
Slope etc. settles Characteristics of Development.
(3) by numerical simulation calculation, and with live girder construction monitoring point identical place cloth on corresponding monitoring point,
Percentage of each construction stage on girder construction deformation slope influence is obtained, given respective corresponding control standard is multiplied by with percentage
Value, along with engineering analogy, comprehensive analysis obtains the control standard value of each construction stage.
(4) the control standard value of each construction stage obtained with step (3) using field measurement value is compared, in construction
During according to both real time contrasts, reach the deformation of prediction girder construction slope and ensure the purpose of girder construction safety.
In the step (1)：
1) in rock mass, rock mass is linear elastic materials, beam deformation slope to the malformation forecast Control Algorithm applicable elements
With excavate carry out it is linearly increasing.
2) dynamic change on each construction stage stratum and supporting construction is understood by monitoring measurement, to ensure in work progress
It is middle deformation it is excessive when in time take measures ensure safety.
3) monitoring system will be monitored using reliable instrument.
4) monitoring point, datum mark are set and answer reasonable, and measuring point is protected during monitoring.
5) many pilot tunnel Large span tunnel excavation steps are：1 is first excavated, and is separated by 10m or so and is excavated 2, with 2 face phases
3 are excavated every 10m or so, being separated by 10m or so with 3 faces excavates 4, being separated by 10m or so with 4 faces excavates 5,
It is separated by 10m or so with 5 faces and excavates 6.
In the step (3)：
1) girder construction deformation slope is set as beam left end vertical displacement ZCWith beam right-hand member vertical displacement ZDDifference and beam from height
Spend the ratio of L, as slope tan β=(ZD-ZC)/L, such as Fig. 2.
2) within -30mm, its inclination is that difference limit value is less than 0.002 to beam total settlement controlling value.
In the step (4)：
1) monitoring point chosen in numerical model should match with the monitoring point of live cloth, to ensure numerical result
Accuracy.
2) in the control standard of each construction stage determines, numerical simulation calculation result accounts for 60%~70%, and other are similar to
Engineering experience accounts for 30%~40%.
Further, in the step (4)：
1) field measurement value accurately and reliably, before being contrasted with controlling value will will reject bad value, to ensure the accurate of comparison
Rationally.
2) field monitoring value will with calculated value dynamic contrast, to ensure construction safety.
3) the posterior settlement stage, by girder construction field monitoring data, timely feedback, Dynamic Construction, more than settlement Control
Value, takes follow-up reinforcing and remedial measure, effectively carries out girder construction deformation slop control.
Specific embodiment above is only the preferred embodiment of this creation, is not used to limit this creation, all in this wound
Any modification, equivalent substitution and improvements for being done etc. within the spirit and principle of work, should be included in this creation protection domain it
It is interior.
Claims (4)
1. the girder construction Deformation Prediction control method of underground structure is worn under a kind of tunnel, it is characterised in that：Including following construction
Step：
1) many pilot tunnel Large span tunnels that the girder construction of underground structure, is worn under are excavated, at the scene on the upper and lower cloth of girder construction
Monitoring point, is monitored and collection site Monitoring Data to monitoring point；
2), by girder construction be divided into 1 excavation sedimentation, 2 excavation sedimentation, 3 excavation sedimentation, 4 excavation
Sedimentation, 5 sedimentations excavated, 6 seven stages of sedimentation and posterior settlement excavated, grasp each stage girder construction itself inclination
Characteristics of Development；
3), by numerical simulation calculation, and with live girder construction monitoring point identical place cloth on corresponding monitoring point, obtain
Each construction stage, on the percentage of girder construction deformation slope influence, given respective corresponding control standard value is multiplied by with percentage,
Along with engineering analogy, comprehensive analysis obtains the control standard value of each construction stage；Wherein, girder construction deformation slope setting
It is beam left end vertical displacement ZCWith beam right-hand member vertical displacement ZDDifference and beam its length L ratio, as slope tan β=(ZD-
ZC)/L；Within -30mm, its inclination is that difference limit value is less than 0.002 to girder construction total settlement controlling value；
4) the control standard value of each construction stage for, being obtained with step (3) using field measurement value is compared, in work progress
Both middle basis real time contrasts, reach the slope deformation of prediction girder construction.
2. the girder construction Deformation Prediction control method of underground structure is worn under tunnel as claimed in claim 1, it is characterised in that：
The step 1) in, many pilot tunnel Large span tunnel excavation steps are：1 is first excavated, and is separated by 10m or so and is excavated 2 again, with 2 palms
Sub- face is separated by 10m or so and excavates 3 again, and be separated by 10m or so with 3 faces excavates 4 again, and it is left to be separated by 10m with 4 faces
The right side excavates 5 again, and be separated by 10m or so with 5 faces excavates 6 again.
3. the girder construction Deformation Prediction control method of underground structure is worn under tunnel as claimed in claim 1, it is characterised in that：
The step 4) in, the monitoring point chosen in numerical model should match with the monitoring point of live cloth；In the control of each construction stage
During standard processed determines, numerical simulation calculation result accounts for 60%~70%, and other similar engineering experiences account for 30%~40%.
4. the girder construction Deformation Prediction control method of underground structure is worn under tunnel as claimed in claim 1, it is characterised in that：
The step 4) in, before being contrasted with controlling value, to reject bad value；Field monitoring value will be with calculated value dynamic contrast；Later stage
Subsidence stage, by girder construction field monitoring data, feedback, Dynamic Construction, more than raft foundation stress, take follow-up adding in time
Gu and remedial measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044538.6A CN106909715A (en) | 2017-01-19 | 2017-01-19 | The girder construction Deformation Prediction control method of underground structure is worn under a kind of tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710044538.6A CN106909715A (en) | 2017-01-19 | 2017-01-19 | The girder construction Deformation Prediction control method of underground structure is worn under a kind of tunnel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5005422A (en) * | 1988-09-14 | 1991-04-09 | Schlumberger Technology Corporation | Method and apparatus for measuring subsidence |
| CN103510962A (en) * | 2013-10-22 | 2014-01-15 | 北京交通大学 | Soft soil stratum shield penetration building grading deformation control method |
| CN104766129A (en) * | 2014-12-31 | 2015-07-08 | 华中科技大学 | Subway shield construction surface deformation warning method based on temporal and spatial information fusion |
| CN106193083A (en) * | 2016-08-01 | 2016-12-07 | 北京市政建设集团有限责任公司 | A kind of subsidence control method of many pilot tunnels tunnel underbridge stake |
-
2017
- 2017-01-19 CN CN201710044538.6A patent/CN106909715A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5005422A (en) * | 1988-09-14 | 1991-04-09 | Schlumberger Technology Corporation | Method and apparatus for measuring subsidence |
| CN103510962A (en) * | 2013-10-22 | 2014-01-15 | 北京交通大学 | Soft soil stratum shield penetration building grading deformation control method |
| CN104766129A (en) * | 2014-12-31 | 2015-07-08 | 华中科技大学 | Subway shield construction surface deformation warning method based on temporal and spatial information fusion |
| CN106193083A (en) * | 2016-08-01 | 2016-12-07 | 北京市政建设集团有限责任公司 | A kind of subsidence control method of many pilot tunnels tunnel underbridge stake |
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Application publication date: 20170630 |