CN102191938A - Chengdu pebble stratum shield driving method - Google Patents
Chengdu pebble stratum shield driving method Download PDFInfo
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- CN102191938A CN102191938A CN2010101189968A CN201010118996A CN102191938A CN 102191938 A CN102191938 A CN 102191938A CN 2010101189968 A CN2010101189968 A CN 2010101189968A CN 201010118996 A CN201010118996 A CN 201010118996A CN 102191938 A CN102191938 A CN 102191938A
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Abstract
The invention discloses a construction method for long-distance driving of a shield in a Chengdu stratum. The stability problem of a shield tunnel excavated surface, the earth pressure balance problem of a shield machine, the problem of reducing the abrasion of the shield machine and the like are controlled by selecting the construction parameters; and the main parameters comprise how to select the driving speed in a pebble stratum, how to select the earth bin pressure in the pebble stratum, how to select the thrust of a jack in the pebble stratum, how to control virtual memory technique (VMT) deviation rectification, how to select the revolving speed of a cutter head tool and how to select the grouting quantity under different conditions.
Description
Technical field:
The present invention is a kind of construction parameter system of selection of shield driving, especially adapts at Chengdu pebble layer extra long distance.Can effectively control the surface buildings sedimentation, reduce construction risk, save construction cost, improve drivage efficiency.
Background technology:
With regard to the shield-tunneling construction in China and most of in the world area, cause that about Shield Tunnel in Soft Soil the stratum moves with deformation rule comparatively deeply, a large amount of research has also been carried out in compound stratum and the construction disturbance of loess stratum.And it is less to the control method research of shield-tunneling construction stratum deformation related law under the sand-pebble layer condition and reduction ground disturbance, sand-pebble layer mechanical characteristic and physical characteristic and above several stratum difference are very big, and this stratum main feature is that earth formation is loose, cobble and erratic boulder content height, big, the single cobble intensity of transmission coefficient are big.Explore Chengdu sand-pebble layer construction parameter system of selection and can provide theoretical foundation, and provide instruction, create better social benefit and economic benefit this stratum shield construction for design, the construction of later similar stratum shield tunnel.
Summary of the invention:
The job practices of a kind of shield structure long distance driving on the stratum, Chengdu, the earth pressure balance problem of main stability problem, shield machine, reduction shield machine wear problem etc. by construction parameter selection control shield tunnel excavation face, major parameter comprises how driving speed is selected at pebble layer, how soil storehouse pressure is selected at pebble layer, how jack thrust is selected at pebble layer, how the VMT correction is controlled, how cutterhead tool rotary speed is selected, and how grouting amount is chosen in different situations.
The invention has the beneficial effects as follows, can reduce construction risk, prolong shield structure application life, reduce and shut down number of times, reduced the shield-tunneling construction ground disturbance, reduce construction cost, improve construction speed.
The specific embodiment:
1. fltting speed is easy to control about 30mm/min, and the mistake building can be brought up to 40mm/min and pass through fast, but maximal rate is difficult for surpassing 50mm/min.Soil storehouse pressure generally should be less than 0.8bar, and is less at 1.6～2.0bar ground settlement.Should note observing strain gauge stress difference up and down in native storehouse during driving, when difference is big, need carry out soil body improvement.
2. the jack stroke should be not less than 1750mm, and cutterhead tool rotary speed should maintain between 1.1～1.3rpm, and gross thrust should be controlled at 8000～14000kN; Should be controlled at 9000-12000kN when crossing building, cutterhead moment of torsion 3000～5000kNm.VMT left and right sides error is controlled in the 40mm, and front and back are controlled in the 30mm, and the circular curve segment horizontal attitude is controlled in the 8mm; Vertically trend is controlled in the every linear meter(lin.m.) scope of 3mm, and easement curve section horizontal attitude is controlled in the 5mm; The shield tail is controlled at-30mm about.
3. grouting amount should be less than 6m
3/ ring, the grouting amount in special locations such as the building that crossed the river is 7.5～9m
3/ ring, 1, No. 2 synchronous grouting pipe pressure 1.5～2.0bar of ordinary circumstance.3, No. 4 pressure 2.0～2.5bar.
Claims (5)
1. method that adapts to Chengdu sand-pebble layer shield driving, its main boring parameter to be chosen as under this stratum fltting speed easy to control about 30mm/min, crosses building and can bring up to 40mm/min and pass through fast, but maximal rate is difficult for surpassing 50mm/min.
2. generally should be according to the described feature of claim 1 soil storehouse pressure less than 0.8bar, less at 1.6～2.0bar ground settlement.Should note observing strain gauge stress difference up and down in native storehouse during driving, when difference is big, need carry out soil body improvement.
3. should be not less than 1750mm according to the described feature jack of claim 1 stroke, cutterhead tool rotary speed should maintain between 1.1～1.3rpm, and gross thrust should be controlled at 8000～14000kN; Should be controlled at 9000-12000kN when crossing building, cutterhead moment of torsion 3000～5000kNm.
4. be controlled in the 40mm according to the described feature VMT of claim 1 left and right sides error, front and back are controlled in the 30mm, and the circular curve segment horizontal attitude is controlled in the 8mm; Vertically trend is controlled in the every linear meter(lin.m.) scope of 3mm, and easement curve section horizontal attitude is controlled in the 5mm; The shield tail is controlled at-30mm about.
5. should be according to the described feature grouting amount of claim 1 less than 6m
3/ ring, the grouting amount in special locations such as the building that crossed the river is 7.5～9m
3/ ring, 1, No. 2 synchronous grouting pipe pressure 1.5～2.0bar of ordinary circumstance.3, No. 4 pressure 2.0～2.5bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101189968A CN102191938A (en) | 2010-03-08 | 2010-03-08 | Chengdu pebble stratum shield driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101189968A CN102191938A (en) | 2010-03-08 | 2010-03-08 | Chengdu pebble stratum shield driving method |
Publications (1)
| Publication Number | Publication Date |
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| CN102191938A true CN102191938A (en) | 2011-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010101189968A Pending CN102191938A (en) | 2010-03-08 | 2010-03-08 | Chengdu pebble stratum shield driving method |
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| CN (1) | CN102191938A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767377A (en) * | 2012-08-13 | 2012-11-07 | 中铁一局集团有限公司 | Loess strata subway tunnel earth pressure balance shield construction method |
| CN103277109A (en) * | 2013-04-28 | 2013-09-04 | 上海市机械施工有限公司 | Shield excavation construction method used for big-stickiness soil layer |
| CN104060998A (en) * | 2014-07-03 | 2014-09-24 | 北京城建集团有限责任公司 | Large-diameter cobble and boulder splitting and crushing method of shield heavy tearing knife |
| CN104653191A (en) * | 2014-12-31 | 2015-05-27 | 广东华隧建设股份有限公司 | Method of earth pressure shield machine tunnelling in high efficiency in water-rich round gravel stratum |
| CN107676100A (en) * | 2017-09-05 | 2018-02-09 | 石家庄铁道大学 | Poor strata Forecasting Methodology based on shield driving parameter |
| CN108446418A (en) * | 2018-01-16 | 2018-08-24 | 天津大学 | A kind of shield driving gross thrust computational methods based on dimensional analysis |
-
2010
- 2010-03-08 CN CN2010101189968A patent/CN102191938A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767377A (en) * | 2012-08-13 | 2012-11-07 | 中铁一局集团有限公司 | Loess strata subway tunnel earth pressure balance shield construction method |
| CN102767377B (en) * | 2012-08-13 | 2014-08-06 | 中铁一局集团有限公司 | Loess strata subway tunnel earth pressure balance shield construction method |
| CN103277109A (en) * | 2013-04-28 | 2013-09-04 | 上海市机械施工有限公司 | Shield excavation construction method used for big-stickiness soil layer |
| CN104060998A (en) * | 2014-07-03 | 2014-09-24 | 北京城建集团有限责任公司 | Large-diameter cobble and boulder splitting and crushing method of shield heavy tearing knife |
| CN104060998B (en) * | 2014-07-03 | 2016-08-17 | 北京城建集团有限责任公司 | A kind of shield heavy type tearing cutter splitting breaking method to big particle diameter ovum erratic boulder |
| CN104653191A (en) * | 2014-12-31 | 2015-05-27 | 广东华隧建设股份有限公司 | Method of earth pressure shield machine tunnelling in high efficiency in water-rich round gravel stratum |
| CN104653191B (en) * | 2014-12-31 | 2017-06-13 | 广东华隧建设股份有限公司 | A kind of method of earth pressure shield tunneling machine high efficient driving in rich water round gravel stratum |
| CN107676100A (en) * | 2017-09-05 | 2018-02-09 | 石家庄铁道大学 | Poor strata Forecasting Methodology based on shield driving parameter |
| CN107676100B (en) * | 2017-09-05 | 2019-08-02 | 石家庄铁道大学 | Poor strata prediction technique based on shield driving parameter |
| CN108446418A (en) * | 2018-01-16 | 2018-08-24 | 天津大学 | A kind of shield driving gross thrust computational methods based on dimensional analysis |
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| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhao Xuwei Document name: Notification of Publication of the Application for Invention |
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| DD01 | Delivery of document by public notice |
Addressee: Zhao Xuwei Document name: Notification of before Expiration of Request of Examination as to Substance |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110921 |