CN204899930U - Secretly dig leading dry out well in subway hole - Google Patents
Secretly dig leading dry out well in subway hole Download PDFInfo
- Publication number
- CN204899930U CN204899930U CN201520491996.0U CN201520491996U CN204899930U CN 204899930 U CN204899930 U CN 204899930U CN 201520491996 U CN201520491996 U CN 201520491996U CN 204899930 U CN204899930 U CN 204899930U
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- Prior art keywords
- pilot tunnel
- dry out
- well
- construction
- out well
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- 238000009412 basement excavation Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 14
- 230000005641 tunneling Effects 0.000 claims description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004576 sand Substances 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model belongs to the technical field of the subway tunnel excavation, specifically a secretly dig leading dry out well in subway hole. The problem of sand cobble stratum tradition construction precipitation effect not good is solved, a secretly dig leading dry out well in subway hole, the upper pilot tunnel that finishes including being under construction and lower floor's pilot tunnel of treating the construction, the excavation has a plurality of dry out wells on the upper pilot tunnel, and the dry out well runs through in whole lower floor's pilot tunnel of treating the construction, and dry out well top is equipped with the dado, and the dado periphery is provided with the isolation layer, and dry out shaft bottom portion is equipped with the suction pump.
Description
Technical field
The utility model belongs to metro tunnel excavation technical field, specifically Dewatering by leading level well in a kind of tunneling subway hole.
Background technology
In recent years, along with the fast development of subway, process of construction is faced with day by day complicated underground environment.Adopt cut and cover method that large-area earth clearance and traffic must be brought to lead to change, and shield method can only be applied to standard section, is not suitable for section and changes more underground tunnel structure.Shallow burial hidden digging, have natural advantage, floor space is few, does not affect traffic above-ground, and digging mode is flexible, therefore, in subway construction under the new situation, obtains more application.
In excavation of subway process when passing through sand-pebble layer, needing in advance at ground construction dewatering well, by well point method water-pumping/draining, making water level drop to below the scope of operation, in the hope of reaching the condition of anhydrous excavation.But dewatering well (conventional caliber is 200mm) can only make water level reduce in subrange, water level can not be dropped to the height of expection.When especially running into interfacial water or perched water, dewatering well will be at a complete loss as to what to do.Therefore, when tunneling pilot tunnel is constructed, under upper strata pilot tunnel is in anhydrous condition, just can construct very soon; But when constructing the lower floor's pilot tunnel below groundwater table, due to main based on cobble, circle gravel, fine sand in stratum, permeability is strong, inevitably runs into underground water problem.Sometimes face or sidewall there will be larger stock current, run into layer of sand also with quicksand, and form significant threat to the safety of constructor, therefore digging process often plants seepage and suspend.Measure conventional is at present grouting for water blocking, after finding seepage point, it is injected to the cement-silicate dual slurry of rapid solidification, is stoped beyond excavation face by current.Although the method is effective in theory, in practical operation, many problems are there is, such as: current cause more greatly the slurries injected to be diluted by current, waste material and do not have due effect; Because of the uncertainty of formation void, fast solidifying slurries may inject dewatering well and cause the problems such as dewatering well inefficacy.
Summary of the invention
The utility model, in order to solve the not good problem of sand-pebble layer traditional construction dewatering effect, provides Dewatering by leading level well in a kind of tunneling subway hole.
The utility model takes following technical scheme: Dewatering by leading level well in a kind of tunneling subway hole, comprise the complete upper strata pilot tunnel of construction and lower floor's pilot tunnel to be onstructed, on the pilot tunnel of upper strata, excavation has some drainage wells, drainage well is through whole lower floor's pilot tunnel to be onstructed, drainage well top is provided with retaining wall, retaining wall periphery is provided with separation layer, and drainage bottom is provided with suction pump.
Described drainage well cross-distribution is on the pilot tunnel of upper strata.
Described drainage well stake footpath is 1 meter, and the degree of depth is 3-4 rice.
The base plate of the upper strata pilot tunnel of having constructed excavates artificial drainage well, efficiently collects the underground water within the scope of about 3 meters, periphery, reach the object of advance water discharge to the face of lower floor's pilot tunnel.Because drainage well location is before face, while excavation drainage well, serves again the effect of geologic prediction, provide reference to the personnel excavated, to select more efficiently, reasonable manner is excavated, and is kill two birds with one stone.
Compared with prior art, maximum two days of the utility model manually digging hole just can pore-forming, safe, convenient, fast, do not need big machinery and new high-tech material, the difficult problem that sand-pebble layer dewatering effect difference is brought can be overcome, excavation is carried out smoothly, ensure that the duration.Obtain larger duration benefit with few input, therefore, there is high promotional value.
Accompanying drawing explanation
Fig. 1 is the utility model profile;
Fig. 2 is the utility model plan view;
1-upper strata pilot tunnel in figure, 2-lower floor pilot tunnel, 3-drainage well.
Detailed description of the invention
In Practical Project is built.The Beijing Metro undertaken the construction of by middle Tie Shierju group No. 16 lines 17 mark east gate, Yuyuan Lake erect-position immediately below Xicheng District of Beijing and intersection Sanlihe Road, Haidian District, adopt PBA shallow mining method, this station is mainly positioned at alluvial-proluvial plain second-order terrace, be positioned at ancient stream channel, ancient Jin Gou river, the sandy gravel deposited containing a large amount of ancient stream channel in tunneling stratum and Extra-fine sand, permeability is strong.
No. 1, station, east gate, Yuyuan Lake ventilating shaft transverse passage-way levels pilot tunnel is all arranged in sand-pebble layer, and upper strata pilot tunnel is in anhydrous stratum and more stable, can normally excavate.When construct lower floor's pilot tunnel the 4th layer time, because excavation causes underground water to collect to the place of hollowing out, one deck interface current (dewatering well cannot carry out pump drainage to it) at the place of topping bar are topped bar along interface from third layer and are gushed out, and hydraulic pressure is comparatively greatly and with fine sand.Because excavation exists larger risk, cause construction to stop several times, progress is slow.The delayed of transverse passage-way progress will directly cause the main body duration delayed.
Dewatering by leading level well in a kind of tunneling subway hole, comprise the complete upper strata pilot tunnel 1 of construction and lower floor's pilot tunnel 2 to be onstructed, on upper strata pilot tunnel 1, excavation has some drainage wells 3, drainage well 3 is through whole lower floor's pilot tunnel 2 to be onstructed, drainage well 3 top is provided with retaining wall, retaining wall periphery is provided with separation layer, is provided with suction pump bottom drainage well 3.
Described drainage well 3 cross-distribution is on upper strata pilot tunnel 1.
Described drainage well 3 footpaths are 1 meter, and the degree of depth is 3-4 rice.
After drainage well construction completes, the water yield according to every mouthful of well arranges suction pump, ensures that the water flow energy collected is drained in time.After taking above measure, underground water have found passage more efficiently, and face is water burst no longer.The excavation of drainage well has verified again the geological condition of front of tunnel heading to a certain extent, for follow-up excavation provides true and reliable foundation.
Claims (3)
1. Dewatering by leading level well in a tunneling subway hole, it is characterized in that: comprise the complete upper strata pilot tunnel (1) of construction and lower floor's pilot tunnel (2) to be onstructed, lower floor's pilot tunnel (2) is positioned at the below of upper strata pilot tunnel (1), the upper excavation of upper strata pilot tunnel (1) has some drainage wells (3), drainage well (3) is through whole lower floor's pilot tunnel (2) to be onstructed, drainage well (3) top is provided with retaining wall, and retaining wall periphery is provided with separation layer, and drainage well (3) bottom is provided with suction pump.
2. Dewatering by leading level well in tunneling subway hole according to claim 1, is characterized in that: described drainage well (3) cross-distribution is on upper strata pilot tunnel (1).
3. Dewatering by leading level well in tunneling subway hole according to claim 2, is characterized in that: described drainage well (3) stake footpath is 1 meter, and the degree of depth is 3-4 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520491996.0U CN204899930U (en) | 2015-07-09 | 2015-07-09 | Secretly dig leading dry out well in subway hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520491996.0U CN204899930U (en) | 2015-07-09 | 2015-07-09 | Secretly dig leading dry out well in subway hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204899930U true CN204899930U (en) | 2015-12-23 |
Family
ID=54922116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520491996.0U Expired - Fee Related CN204899930U (en) | 2015-07-09 | 2015-07-09 | Secretly dig leading dry out well in subway hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204899930U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227961A (en) * | 2017-06-29 | 2017-10-03 | 中铁十二局集团有限公司 | Heavy caliber dewatering well construction method in metro built by mining method hole |
| CN108661662A (en) * | 2018-05-17 | 2018-10-16 | 中铁十二局集团有限公司 | Water rich strata increases tunnel boring Cheng Jing newly and harnesses the river method |
-
2015
- 2015-07-09 CN CN201520491996.0U patent/CN204899930U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227961A (en) * | 2017-06-29 | 2017-10-03 | 中铁十二局集团有限公司 | Heavy caliber dewatering well construction method in metro built by mining method hole |
| CN108661662A (en) * | 2018-05-17 | 2018-10-16 | 中铁十二局集团有限公司 | Water rich strata increases tunnel boring Cheng Jing newly and harnesses the river method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |