CN107489427A - A kind of water-rich sand layer shield launching termination ruggedized construction and its construction method - Google Patents
A kind of water-rich sand layer shield launching termination ruggedized construction and its construction method Download PDFInfo
- Publication number
- CN107489427A CN107489427A CN201710933229.4A CN201710933229A CN107489427A CN 107489427 A CN107489427 A CN 107489427A CN 201710933229 A CN201710933229 A CN 201710933229A CN 107489427 A CN107489427 A CN 107489427A
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- freezing
- shield launching
- shield
- termination
- water
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000004576 sand Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 230000008014 freezing Effects 0.000 claims abstract description 41
- 238000007710 freezing Methods 0.000 claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000011780 sodium chloride Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000007596 consolidation process Methods 0.000 claims abstract description 7
- 238000005728 strengthening Methods 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 230000005641 tunneling Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 description 2
- 241001365789 Oenanthe crocata Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to a kind of water-rich sand layer shield launching termination ruggedized construction and its construction method, belong to end well stratum consolidation technical field, be in particular a kind of shield launching structure and its construction method that three axles+vertical freezing strengthening construction is used in tunneling boring water-rich sand layer.Starting well end regions are located at the front end of vertical frozen reinforcing area；Freezing pipe is located in vertical frozen reinforcing area, and freezing pipe is perpendicular to the direction of shield starting；Freezing pipe is connected by saline line with Freezing Station.The present invention avoids the weak point present in traditional water-rich sand layer shield launching termination reinforcement technique, to ensure quickly and safely carry out shield launching in the case where place is limited.
Description
Technical field
The present invention relates to a kind of water-rich sand layer shield launching termination ruggedized construction and its construction method, belong to end well stratum
Reinforcement technique field, in particular it is a kind of shield that three axles+vertical freezing strengthening construction is used in tunneling boring water-rich sand layer
Structure originates structure and its construction method.
Background technology
It is continuously increased with the raising and urban congestion of urban compact degree, ground can utilize space fewer and fewer, shield method
Subway tunneling technique of constructing is fast-developing, and what traditional water-rich sand layer shield launching termination reinforcement means used is all the stirring of three axles
The form of stake+termination precipitation carries out shield launching.
But in some cases .., due to limited by place so as to cause end portion region can not carry out three axle reinforcings with
And termination periphery can not carry out precipitation well construction, so as to cause shield launching very big security risk to be present.
For example Nanchang Line 2 Metro fourth highway southern station~Nanchang railway station running tunnel engineering originating terminal is in Nanchang train
Stand, shield receiving terminal is stirred in fourth highway southern station, the wherein former design of Nanchang railway station termination stratum consolidation using the axles of 850@of φ 600 3
Stake is mixed to be reinforced（Strengthening length is 10.5m）1 row's dual pipe high pressure is being set in the range of the ground-connecting-wall 40cm of station simultaneously
Churning water-seal pile and a number of dewatering well is set on termination periphery, to ensure that shield launching is smoothed out.
Due to this section starting end head well adjacent Nanchang railway station eastern station platform, originate well head and platform wall distance only 7.8~
It is Luoyang road tunnel fender post, stake diameter 1m, the long 18~20m of stake, stake spacing 1.1m at 11.4m, foundation ditch north side 6.5m, foundation ditch is northern
Side transformation cabinet buries a diameter 1.2m sewage conduct, buried depth 2m and station termination away from well head distance 2.7m, platform wall bottom
All construction finishes and waits cause influence well ground-connecting-wall, causes starting end head can not be according to design requirement progress stratum consolidation and drop
Water is constructed, so as to bring great potential safety hazard to shield launching driving.
The content of the invention
It is an object of the invention to provide a kind of water-rich sand layer shield launching termination ruggedized construction and its construction method, so that
The weak point present in traditional water-rich sand layer shield launching termination reinforcement technique is avoided, to ensure situation about being limited in place
Under can quickly and safely carry out shield launching.
The present invention to achieve these goals, adopts the following technical scheme that：
A kind of water-rich sand layer shield launching termination ruggedized construction, before starting well end regions are located at vertical frozen reinforcing area
End；
Freezing pipe is located in vertical frozen reinforcing area, and freezing pipe is perpendicular to the direction of shield starting；
Freezing pipe is connected by saline line with Freezing Station.
Further, the quantity of saline line is two.
A kind of construction method of water-rich sand layer shield launching termination ruggedized construction：
A）, reinforced using three axes agitating pile in starting well end regions, it is tunnel each 3.0-5.0m up and down that soil layer, which reinforces thickness,
Each 3.0-5.0m in left and right, strengthening length 7-12m；
B）, after through 28-30 days unconfined compressive strengths of three axes agitating pile soil mass consolidation be not less than 0.8MPa after, vertical frozen adds
Gu region carries out stratum and vertically freezes reinforcing, cement mixing method body is 2-5m with freezing reinforcing body intersection region；Soil layer is reinforced thick
To spend for 3-5m, lower 3-5m on tunnel, each 3-5m in left and right, frost wall length is 5-8m, pitch-row 0.6-0.8m, array pitch 0.8-1.1m,
First row pitch-row ground-connecting-wall 0.4-0.6m；
Duration of freezing is 30-35 days；Freeze to be connected with saline line and Freezing Station after pipe construction, to ensure Freezing Station
Caused cold is cemented out the high temperature in the soil body by saline line；Soil body mean temperature after freezing is not higher than -10
DEG C when, that is, meet shield launching condition；
C）, before shield launching, the freezing pipe in the range of the barrel of termination need to be pulled out to tunnel scope and pulled out to away from tunnel top 0.3-
At 0.6m, can be carried out with to ensure shield in origination process it is secondary freeze, treat that shield machine all passes through reinforcing body and portal enters
After row closure, stop freezing, and cryovial is all pulled out.
Beneficial effects of the present invention：
1st, the present invention disclosure satisfy that under the conditions of limited space, can carry out termination reinforcing, and whole work progress is safe efficient,
It is less demanding for construction site, it can adapt to narrow and small and complicated surrounding terrain place.
2nd, the present invention more effectively solves shield launching mistake by setting conventional reinforcing and consolidation by freezing cross-coincidence region
Two kinds of reinforcing body seam crossing faces may occur in journey water burst, sand problem is gushed, further increase the safety of shield launching
Coefficient.
Brief description of the drawings
Fig. 1 reinforces plan for three axes agitating pile in the present invention with vertical frozen；
Fig. 2 is reinforced for three axles in the present invention and is reinforced drawing in side sectional elevation with vertical frozen；
Fig. 3 is vertical frozen profilograph in the present invention；
Fig. 4 is freezing pipe in the present invention and shield machine location diagram.
Embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings：
A kind of water-rich sand layer shield launching termination ruggedized construction：
Starting well end regions 1 are located at the front end of vertical frozen reinforcing area 2；
Freezing pipe 3 is located in vertical frozen reinforcing area 2, and freezing pipe 3 is perpendicular to the direction of shield starting；
Freezing pipe 3 is connected by saline line with Freezing Station.
The quantity of saline line is two.
A kind of construction method of water-rich sand layer shield launching termination ruggedized construction：
A）, reinforced using three axes agitating pile in starting well end regions 1, it is tunnel each 3.0- up and down that soil layer, which reinforces thickness,
5.0m, each 3.0-5.0m in left and right, strengthening length 7-12m；
B）, after through 28-30 days unconfined compressive strengths of three axes agitating pile soil mass consolidation be not less than 0.8MPa after, vertical frozen adds
Gu region carries out stratum and vertically freezes reinforcing, cement mixing method body is 2-5m with freezing reinforcing body intersection region；Soil layer is reinforced thick
To spend for 3-5m, lower 3-5m on tunnel, each 3-5m in left and right, frost wall length is 5-8m, pitch-row 0.6-0.8m, array pitch 0.8-1.1m,
First row pitch-row ground-connecting-wall 0.4-0.6m；
Duration of freezing is 30-35 days；Freezing pipe 3 is connected after constructing with saline line and Freezing Station, to ensure to freeze
Cold caused by standing is cemented out the high temperature in the soil body by saline line；Soil body mean temperature after freezing not higher than-
At 10 DEG C, that is, meet shield launching condition；
C）, before shield launching, the freezing pipe 3 in the range of the barrel of termination need to be pulled out to tunnel scope and pulled out to away from tunnel top 0.3-
At 0.6m, can be carried out with to ensure shield in origination process it is secondary freeze, treat that shield machine all passes through reinforcing body and portal enters
After row closure, stop freezing, and cryovial is all pulled out.
Claims (3)
- A kind of 1. water-rich sand layer shield launching termination ruggedized construction, it is characterised in that：Starting well end regions（1）Positioned at vertical frozen reinforcing area（2）Front end；Freezing pipe（3）Positioned at vertical frozen reinforcing area（2）In, and freezing pipe（3）Perpendicular to the direction of shield starting；Freezing pipe（3）It is connected by saline line with Freezing Station.
- 2. water-rich sand layer shield launching termination ruggedized construction according to claim 1, it is characterised in that：The number of saline line Measure as two.
- 3. a kind of construction method of water-rich sand layer shield launching termination ruggedized construction as claimed in claim 1 or 2, its feature exist In：A）, in starting well end regions（1）Middle to be reinforced using three axes agitating pile, it is tunnel each 3.0- up and down that soil layer, which reinforces thickness, 5.0m, each 3.0-5.0m in left and right, strengthening length 7-12m；B）, after through 28-30 days unconfined compressive strengths of three axes agitating pile soil mass consolidation be not less than 0.8MPa after, vertical frozen adds Gu region（2）Carry out stratum and vertically freeze reinforcing, cement mixing method body is 2-5m with freezing reinforcing body intersection region；Soil layer is reinforced Thickness is 3-5m, lower 3-5m on tunnel, and each 3-5m in left and right, frost wall length is 5-8m, pitch-row 0.6-0.8m, array pitch 0.8- 1.1m, first row pitch-row ground-connecting-wall 0.4-0.6m；Duration of freezing is 30-35 days；Freezing pipe（3）Connected after construction with saline line and Freezing Station, to ensure to freeze Cold is cemented out the high temperature in the soil body by saline line caused by knot station；Soil body mean temperature after freezing is not high When -10 DEG C, that is, meet shield launching condition；C）, before shield launching, need to be to the freezing pipe in the range of the barrel of termination（3）Pull out to tunnel scope and pull out to away from tunnel top 0.3- At 0.5m, can be carried out with to ensure shield in origination process it is secondary freeze, treat that shield machine all passes through reinforcing body and portal enters After row closure, stop freezing, and cryovial is all pulled out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710933229.4A CN107489427A (en) | 2017-10-10 | 2017-10-10 | A kind of water-rich sand layer shield launching termination ruggedized construction and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710933229.4A CN107489427A (en) | 2017-10-10 | 2017-10-10 | A kind of water-rich sand layer shield launching termination ruggedized construction and its construction method |
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| CN107489427A true CN107489427A (en) | 2017-12-19 |
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| CN201710933229.4A Pending CN107489427A (en) | 2017-10-10 | 2017-10-10 | A kind of water-rich sand layer shield launching termination ruggedized construction and its construction method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457662A (en) * | 2018-02-05 | 2018-08-28 | 浙江大学城市学院 | A kind of control of weak soil shield launching and reinforcement means |
| CN108678781A (en) * | 2018-06-12 | 2018-10-19 | 中铁二十局集团轨道交通工程有限公司 | One kind closing on river shield launching end stratum consolidation method |
| CN109899073A (en) * | 2019-03-19 | 2019-06-18 | 上海城建市政工程（集团）有限公司 | A method of starting a shield machine |
| CN109944596A (en) * | 2019-03-20 | 2019-06-28 | 中铁四局集团有限公司 | Secondary reinforcing method for shield crossing near-river rich water sand layer |
| CN109989759A (en) * | 2019-03-20 | 2019-07-09 | 中铁四局集团有限公司 | Shield initial design and reinforcement method for fine sand layer rich in water powder |
| CN110005419A (en) * | 2019-04-09 | 2019-07-12 | 上海市机械施工集团有限公司 | A kind of shield tunnel end reinforcement means |
| CN110056361A (en) * | 2019-03-20 | 2019-07-26 | 中铁四局集团有限公司 | Reinforcing method for shield access hole of ultra-deep stratum |
| CN111911167A (en) * | 2020-08-31 | 2020-11-10 | 上海市机械施工集团有限公司 | Shield reinforcing construction process |
| CN112302669A (en) * | 2020-12-01 | 2021-02-02 | 长江勘测规划设计研究有限责任公司 | A kind of auxiliary construction method and structure for subway shield tunnel arrival under complex environmental conditions |
| CN112664204A (en) * | 2020-12-28 | 2021-04-16 | 中铁十局集团有限公司 | Shield end well reinforcing structure capable of absorbing extrusion deformation and construction method thereof |
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| CN206299392U (en) * | 2016-12-08 | 2017-07-04 | 中铁第一勘察设计院集团有限公司 | A kind of high osmosis water-rich sand layer shield end reinforcement system |
| CN207212340U (en) * | 2017-10-10 | 2018-04-10 | 南昌轨道交通集团有限公司地铁项目管理分公司 | A kind of water-rich sand layer shield launching termination ruggedized construction |
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| CN102352753A (en) * | 2011-06-29 | 2012-02-15 | 中铁第四勘察设计院集团有限公司 | Freezing consolidation and soil-accumulating watering shield arrival method |
| CN102797468A (en) * | 2012-08-22 | 2012-11-28 | 中铁第四勘察设计院集团有限公司 | Minimum over-burden originating method for shield tunnel |
| CN103590835A (en) * | 2013-11-28 | 2014-02-19 | 北京中煤矿山工程有限公司 | PVC freezing pipe for shield tunneling freeze-consolidation |
| CN104695964A (en) * | 2013-12-04 | 2015-06-10 | 宏润建设集团股份有限公司 | Subway shield tunnel freeze entering method |
| JP2016160717A (en) * | 2015-03-05 | 2016-09-05 | 西松建設株式会社 | Freezing method and freezing device of shield tunnel construction |
| CN104790961A (en) * | 2015-04-27 | 2015-07-22 | 海南大学 | Vertical cup type freezing reinforcement structure and method at shield tunnel end |
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| CN207212340U (en) * | 2017-10-10 | 2018-04-10 | 南昌轨道交通集团有限公司地铁项目管理分公司 | A kind of water-rich sand layer shield launching termination ruggedized construction |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457662A (en) * | 2018-02-05 | 2018-08-28 | 浙江大学城市学院 | A kind of control of weak soil shield launching and reinforcement means |
| CN108678781A (en) * | 2018-06-12 | 2018-10-19 | 中铁二十局集团轨道交通工程有限公司 | One kind closing on river shield launching end stratum consolidation method |
| CN109899073A (en) * | 2019-03-19 | 2019-06-18 | 上海城建市政工程（集团）有限公司 | A method of starting a shield machine |
| CN109944596A (en) * | 2019-03-20 | 2019-06-28 | 中铁四局集团有限公司 | Secondary reinforcing method for shield crossing near-river rich water sand layer |
| CN109989759A (en) * | 2019-03-20 | 2019-07-09 | 中铁四局集团有限公司 | Shield initial design and reinforcement method for fine sand layer rich in water powder |
| CN110056361A (en) * | 2019-03-20 | 2019-07-26 | 中铁四局集团有限公司 | Reinforcing method for shield access hole of ultra-deep stratum |
| CN109989759B (en) * | 2019-03-20 | 2020-08-07 | 中铁四局集团有限公司 | Shield initial design and reinforcement method for fine sand layer rich in water powder |
| CN110005419A (en) * | 2019-04-09 | 2019-07-12 | 上海市机械施工集团有限公司 | A kind of shield tunnel end reinforcement means |
| CN111911167A (en) * | 2020-08-31 | 2020-11-10 | 上海市机械施工集团有限公司 | Shield reinforcing construction process |
| CN112302669A (en) * | 2020-12-01 | 2021-02-02 | 长江勘测规划设计研究有限责任公司 | A kind of auxiliary construction method and structure for subway shield tunnel arrival under complex environmental conditions |
| CN112664204A (en) * | 2020-12-28 | 2021-04-16 | 中铁十局集团有限公司 | Shield end well reinforcing structure capable of absorbing extrusion deformation and construction method thereof |
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Application publication date: 20171219 |