CN106351677A - Underground water step-freezing method for deeply-buried tunnel station construction in water rich sand cobble stratum - Google Patents
Underground water step-freezing method for deeply-buried tunnel station construction in water rich sand cobble stratum Download PDFInfo
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- CN106351677A CN106351677A CN201611018946.6A CN201611018946A CN106351677A CN 106351677 A CN106351677 A CN 106351677A CN 201611018946 A CN201611018946 A CN 201611018946A CN 106351677 A CN106351677 A CN 106351677A
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- freezing
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- freezing part
- pipe
- rich water
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- 238000007710 freezing Methods 0.000 title claims abstract description 84
- 238000010276 construction Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000004576 sand Substances 0.000 title abstract description 8
- 230000008014 freezing Effects 0.000 claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract 4
- 238000005192 partition Methods 0.000 abstract 4
- 239000012774 insulation material Substances 0.000 abstract 1
- 238000009412 basement excavation Methods 0.000 description 13
- 230000009189 diving Effects 0.000 description 8
- 230000011218 segmentation Effects 0.000 description 8
- 239000002689 soil Substances 0.000 description 5
- 239000012267 brine Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses an underground water step-freezing method for deeply-buried tunnel station construction in water rich sand cobble stratum. The step-freezing method includes a freezing part, a non-freezing part and an insulation partition plate; the freezing part consists of hollow and seamless steel pipes, the freezing part is inserted and placed under the station board; the non-freezing part is placed on top of the freezing part, the non-freezing part includes a liquid inflow pipe, a liquid return pipe and filled insulation material, the liquid inflow pipe and the liquid return pipe are respectively inserted and placed inside the seamless steel pipe; the insulation partition plate is placed between the freezing part and the non-freezing part, the insulation partition plate separates the freezing part and the non-freezing part, the insulation partition plate is arranged with a liquid inflow pipe round hole and a liquid return pipe round hole.
Description
Technical field
The present invention relates to technical field of construction is excavated on stratum, the more particularly to buried Station of rich water sand-pebble layer is applied
Work underground moisture section freezing method.
Background technology
With the continuous development of current social, the increase of population, land resource becomes more rare, more in order to obtain
Space, the exploitation underground space has become as alleviates congested in traffic inexorable trend.And at this stage, various city underground engineerings are
Build, such as city underground, river bed, seabed and mountain tunnel, deep foundation building and basement etc..But the foundation pit walls all come therewith
Supporting, water proof the problems such as also become increasingly to project, ring especially around severe geology, hydrologic condition and harshness
Under border.In recent years, the Persisting exploitation with urban underground space it has to tackle the problem that deep excavation is brought, stopped by deep layer
Water is exactly the problem wherein projecting, and these problems also include:
(1) excavation area is big
Excavation area is big, and what length and width had reaches hundreds of meters, and project scale increasingly increases, and brings larger to support system
Difficulty；Large-area excavation of foundation pit destroys the natural poised state of the original soil body, and after excavation of foundation pit, most of deformation meeting exists
Generation in initial 24 hours.If supportted again after digging, in the meantime, the soil body has produced moderate finite deformation.As for stage excavation, because
Deeper foundation ditch, once excavates on earth, and slope soil also can produce moderate finite deformation.
(2) stratum osmotic coefficient is big
Water table aquifer difference in distribution in the range of metro station construction is larger, aqueous abundant, and station bottom waterproofly
Layer buried depth is deeper, and stratum osmotic coefficient is big.If using the method for the precipitation that draws water, can produce necessarily to Adjacent Buildings ground
Impact, and extract a large amount of subsoil water daily, pumping equipment setting is difficult, and environment can be had an impact.
(3) Adjacent Buildings are intensive
Deep excavation can produce larger displacement and sedimentation, causes shadow to Adjacent Buildings, urban operating mechanism and underground utilities
Ring, therefore deep basal pit is more strict to stable and displacement requirement；Implement in busy city proper location, similar Large Underground excavates
Construction work causes the adverse effect to neighboring buildings, so that house is produced badly damaged, and the use of existed building also suffers from endangering,
Hinder being normally carried out of project under construction.
It is desirable to there being a kind of rich water sand-pebble layer buried Station construction underground moisture section freezing method can be every
Freeze to reach sealing purpose with water-bearing layer below the floor of station.
Content of the invention
It is an object of the invention to provide a kind of rich water sand-pebble layer buried Station construction underground moisture section is freezed
Method is overcoming the above-mentioned problems in the prior art.
For achieving the above object, the present invention provides a kind of rich water sand-pebble layer buried Station construction underground moisture section
Freezing method, described rich water sand-pebble layer buried Station construction underground moisture section freezing method includes: frozen fraction, non-
Frozen fraction and thermal baffle；
Frozen fraction, described frozen fraction is made up of the seamless steel pipe of hollow, and described frozen fraction plugs base plate AT STATION
Lower section；
Non-freezing part, described non-freezing part is arranged on above described frozen fraction, described non-freezing part include into
The adiabator of liquid pipe, liquid back pipe and filling, described feed tube and liquid back pipe are plugged in described seamless steel pipe respectively；
Thermal baffle, described thermal baffle is arranged between described frozen fraction and non-freezing part, described thermal baffle
Frozen fraction and non-freezing part are isolated, described thermal baffle is provided with feed tube circular hole and liquid back pipe circular hole.
Preferably, the depth of described non-freezing part excavates the depth of part for station.
Preferably, the depth of described frozen fraction does not excavate the depth of part for station base plate.
Preferably, isolated by adiabatic packing material between described feed tube and liquid back pipe.
Preferably, the material of described seamless steel pipe is low-carbon (LC) seamless steel pipe.
Preferably, described seamless steel pipe is φ 127mm × 5mm, and Frozen wall thickness is 3m.
Preferably, the spacing between described step freezing pipe is 2.5m.
The underground moisture section freezing method the invention provides a kind of buried Station of rich water sand-pebble layer is constructed, passes through
The rich water sand-pebble layer buried Station construction underground moisture section freezing method of the present invention can reach following beneficial effect:
1. do not destroy deep phreatic water preservation and migration rule；
2. not polluted underground water water quality, does not destroy existing underground structure；
3. freezing hole starts to construct downwards from minus two layers of top board, needs to pass through minus three layers of excavation spaces arrival designed elevation,
It is therefore possible to use step freezing is so that base plate needs frozen region to form complete flat board, and minus three layers of soil excavating in space
Body do not freeze or few freeze, not only save and excavate cost, and reduce and freeze expense.
Brief description
Fig. 1 is the vertical section schematic diagram of rich water sand-pebble layer buried Station construction underground moisture section freezing method.
Fig. 2 is the schematic cross-sectional view of rich water sand-pebble layer buried Station construction underground moisture section freezing method.
Specific embodiment
For making purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from start to finish or class
As the label element that represents same or similar element or there is same or like function.Described embodiment is the present invention
A part of embodiment, rather than whole embodiments.Embodiment below with reference to Description of Drawings is exemplary it is intended to use
In the explanation present invention, and it is not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.Under
Face combines accompanying drawing and embodiments of the invention is described in detail.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", "front", "rear",
The orientation of instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " or position relationship are based on accompanying drawing institute
The orientation showing or position relationship, are for only for ease of the description present invention and simplify description, rather than the dress of instruction or hint indication
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that protecting to the present invention
The restriction of scope.
In the present invention one broad embodiment, the rich water sand-pebble layer buried Station construction underground moisture section side of freezing
Method, described rich water sand-pebble layer buried Station construction underground moisture section freezing method includes: frozen fraction, non-freezing portion
Divide and thermal baffle；Frozen fraction, described frozen fraction is made up of the seamless steel pipe of hollow, and described frozen fraction plugs AT STATION
Below base plate；Non-freezing part, described non-freezing part is arranged on above described frozen fraction, described non-freezing part include into
The adiabator of liquid pipe, liquid back pipe and filling, described feed tube and liquid back pipe are plugged in described seamless steel pipe respectively；Adiabatic every
Plate, described thermal baffle is arranged between described frozen fraction and non-freezing part, and described thermal baffle is by frozen fraction and non-
Frozen fraction is isolated, and described thermal baffle is provided with feed tube circular hole and liquid back pipe circular hole.
As shown in Figure 1-2, rich water sand-pebble layer buried Station construction underground moisture section freezing method includes: freezes
Knot divides 1, non-freezing part 2 and thermal baffle 3.
Described frozen fraction 1 is made up of the seamless steel pipe 4 of hollow, and described frozen fraction 1 plugs AT STATION below base plate.
Described non-freezing part 2 is arranged on the top of described frozen fraction 1, described non-freezing part 2 include feed tube 5,
Liquid back pipe 6 and the adiabator 7 of adiabatic filling, described feed tube 5 and liquid back pipe 6 are plugged in described seamless steel pipe 4 respectively,
Isolated by adiabatic packing material 7 between described feed tube 5 and liquid back pipe 6.
Described thermal baffle 3 is arranged between described frozen fraction 1 and non-freezing part 2, and described thermal baffle 3 will freeze
Part 1 and non-freezing part 2 are isolated.
Described thermal baffle 3 is provided with feed tube circular hole and liquid back pipe circular hole.
The depth of described non-freezing part excavates the depth of part for station.
The depth of described frozen fraction does not excavate the depth of part for station base plate.
Isolated by adiabatic packing material between described feed tube and liquid back pipe.
The material of described seamless steel pipe is low-carbon (LC) seamless steel pipe.
Described seamless steel pipe is φ 127mm × 5mm, and Frozen wall thickness is 3m.
Spacing between described step freezing pipe is 2.5m.
No. 19 line Bei Taipingzhuangs station geological conditions:
1st, in the range of station, stratum is followed successively by from top to bottom: silty clay 4. layer, Extra-fine sand 4. 3, cobble circle gravel 5., silty
Clay 6., 6. 2 layers of silt, detail sand 6. 3,7. 2 layers of Extra-fine sand, cobble 7. layer, cobble 9. layer, 9. 2 layers of Extra-fine sand.Vault is located at
3. 3 layers of Extra-fine sand, medium coarse sand 4. 4, base plate is located at cobble 9. layer, infiltration coefficient 150m/d.
2nd, perched water buried depth 2.5m～5.8m, dive under water (two) buried depth 11.2m～14.64m, at the vault of station, dives
Water (three) buried depth 26.6m～30.5m, 7m～11m above the base plate of station.
For No. 19 line stations, dive under water (two) buried depth 14.5m, and positioned at station vault, dive under water (three) buried depth 26.7m,
11.4m above the base plate of station.Take boring will dive under water (two) hydrophobic to diving (three) stratum after, diving (three) buried depth at
It is possible to plate in minus two layers of directly being constructed to station using commonsense method below plate in minus two layers of the station.
The key link of station construction is excavation and the structure construction on below plate in minus two floor in No. 19 line stations stratum, we
Case is mainly designed to solve the problems, such as construct in the stratum of below plate in minus two floor in No. 19 line stations, that is, contain in diving (three) stratum
Excavation and station construction, specific work progress carries out on plate in minus two layers completing, special instruction, practice of construction
In, if it find that the depth shallower of diving (three), cannot be constructed in minus two layers of station using commonsense method and, during plate, can construct
Extreme lower position, increase construction middle plate temporarily, middle plate temporarily carry out construction freezing method reinforcing, to separate subsoil water, subsequently
Processing method essentially identical.
Contain diving (three) stratum to process No. 19 lines, meet station and excavate and structure construction, using step freezing pipe, will
Freeze below negative Tipple Bottom plate, cut-off diving (three).
I.e. on plate in minus two floor in No. 19 line stations, arrange freezing hole, using step freezing pipe, minus three layers without freezing,
Freeze the soil body of below negative Tipple Bottom plate, and then separate diving (three), excavate minus three layers of station.
All of freezing hole is constructed on plate in minus two layers AT STATION, in the border excavating scope, when skirt piles are constructed in advance
Arrangement one circle freezing hole, forms the freezing curtain of ring, to resist the Water And Earth Pressures of surrounding.Close in the inside arrangement excavating scope
The freezing hole of cloth, forms water shutoff flat board (having some strength) using partial freezing's method in the bottom excavating scope, under opposing
The water pressure in portion.
No. 19 line diving three-level lines are under minus two floor base plate, accordingly, it would be desirable to vertically jelly of constructing on minus two layers of base plate
Knot pipe (calling middle plate freezing pipe in the following text), Frozen wall thickness takes 3m, backfill 1m thickness plain concrete cushion layer under negative Tipple Bottom plate, and middle plate freezes
Length of tube is 12.3m.It is 22.3m that periphery freezes length of tube, and duration and cost for saving engineering can be by periphery layout of freezing pipes
In skirt piles, lagging edge pile driving construction is carried out simultaneously, saves drilling time and expense.
Solidification point: actively -26 DEG C to -30 DEG C of freezing period brine temp, safeguard -25 DEG C of freezing period brine temp
To -28 DEG C.- 10 DEG C of frost wall mean temperature.Middle plate freezes tube pitch and controls in 2.5m, and array pitch controls in 2m.
Freeze pipe size: middle plate freezing pipe a size of 127mm × 5mm, partial freezing.
Because construction area area is larger, the construction period is long, for convenience organizing construction, by the distributing position of transverse passage-way,
Whole construction area is divided into five sections (l5, l6 spacing is larger, point two sections of constructions) along station length direction, transverse passage-way both sides adopt
The deep freezing curtain freezing (i.e. single freezing pipe does not adopt partial freezing's mode), forming closing in segmentation portion entirely, to facilitate group
Knit excavation construction.Between different sections, sequential organization construction is it is ensured that excavate the seriality with structure construction.Whole boundary of works area is divided into
Five construction segmentations, it is contemplated that construction infection each other, segmentation one and segmentation five can start simultaneously at construction, are then carried out
Segmentation two and the construction of segmentation four, finally carry out the construction of segmentation three.Respectively freeze inside segmentation, the freezing speed of middle freezing hole
Hurry up, excavation construction can excavate to surrounding from centre, excavation construction in advance saves the construction period.
Finally it is noted that above example, only in order to technical scheme to be described, is not intended to limit.To the greatest extent
Pipe has been described in detail to the present invention with reference to the foregoing embodiments, it will be understood by those within the art that: it is still
Technical scheme described in foregoing embodiments can be modified, or wherein some technical characteristics are carried out with equivalent replacing
Change；And these modifications or replacement, do not make the essence of appropriate technical solution depart from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (7)
1. rich water sand-pebble layer buried Station construction underground moisture section freezing method is it is characterised in that include: freezes portion
Point, non-freezing part and thermal baffle；
Frozen fraction, described frozen fraction is made up of the seamless steel pipe of hollow, and described frozen fraction plugs AT STATION below base plate；
Non-freezing part, described non-freezing part is arranged on above described frozen fraction, described non-freezing part include feed tube,
Liquid back pipe and the adiabator of filling, described feed tube and liquid back pipe are plugged in described seamless steel pipe respectively；
Thermal baffle, described thermal baffle is arranged between described frozen fraction and non-freezing part, and described thermal baffle will freeze
Knot is divided and is isolated with non-freezing part, and described thermal baffle is provided with feed tube circular hole and liquid back pipe circular hole.
2. the buried Station of rich water sand-pebble layer as claimed in claim 1 is constructed underground moisture section freezing method, and it is special
Levy and be, the depth of described non-freezing part excavates the depth of part for station.
3. the buried Station of rich water sand-pebble layer as claimed in claim 1 is constructed underground moisture section freezing method, and it is special
Levy and be, the depth of described frozen fraction does not excavate the depth of part for station base plate.
4. the buried Station of rich water sand-pebble layer as claimed in claim 1 is constructed underground moisture section freezing method, and it is special
Levy and be, isolated by adiabatic packing material between described feed tube and liquid back pipe.
5. the buried Station of rich water sand-pebble layer as claimed in claim 1 is constructed underground moisture section freezing method, and it is special
Levy and be, the material of described seamless steel pipe is low-carbon (LC) seamless steel pipe.
6. the buried Station of rich water sand-pebble layer as claimed in claim 5 is constructed underground moisture section freezing method, and it is special
Levy and be, described seamless steel pipe is φ 127mm × 5mm, Frozen wall thickness is 3m.
7. the buried Station of rich water sand-pebble layer as claimed in claim 5 is constructed underground moisture section freezing method, and it is special
Levy and be, the spacing between described step freezing pipe is 2.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611018946.6A CN106351677A (en) | 2016-11-18 | 2016-11-18 | Underground water step-freezing method for deeply-buried tunnel station construction in water rich sand cobble stratum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611018946.6A CN106351677A (en) | 2016-11-18 | 2016-11-18 | Underground water step-freezing method for deeply-buried tunnel station construction in water rich sand cobble stratum |
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| CN106351677A true CN106351677A (en) | 2017-01-25 |
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| CN201611018946.6A Pending CN106351677A (en) | 2016-11-18 | 2016-11-18 | Underground water step-freezing method for deeply-buried tunnel station construction in water rich sand cobble stratum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024548A (en) * | 2018-07-26 | 2018-12-18 | 北京城建集团有限责任公司 | A kind of partial freezing device and production method |
| CN110566210A (en) * | 2019-09-04 | 2019-12-13 | 北京中煤矿山工程有限公司 | Horizontal freezer and freezing method for segmented time-staggered space |
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| CN2627061Y (en) * | 2003-06-20 | 2004-07-21 | 中国矿业大学 | Liquid nitrogen partial freezing equipment |
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| CN105937397A (en) * | 2016-06-23 | 2016-09-14 | 中国矿业大学 | Segmented excavation freezing method reinforcing construction method for deep tunnel |
| CN105951860A (en) * | 2016-06-24 | 2016-09-21 | 北京城建集团有限责任公司 | Slanting freezing bottom-making water stop structure for interior and side faces of underground excavated foundation pit and method |
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| CN2627061Y (en) * | 2003-06-20 | 2004-07-21 | 中国矿业大学 | Liquid nitrogen partial freezing equipment |
| CN102619213A (en) * | 2012-02-16 | 2012-08-01 | 中国矿业大学(北京) | Freezing apparatus with double circulating systems |
| CN103696415A (en) * | 2013-12-24 | 2014-04-02 | 中煤第五建设有限公司 | Energy-saving freezing pipe for freezing underwater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024548A (en) * | 2018-07-26 | 2018-12-18 | 北京城建集团有限责任公司 | A kind of partial freezing device and production method |
| CN109024548B (en) * | 2018-07-26 | 2023-10-31 | 北京城建集团有限责任公司 | Local freezer and manufacturing method |
| CN110566210A (en) * | 2019-09-04 | 2019-12-13 | 北京中煤矿山工程有限公司 | Horizontal freezer and freezing method for segmented time-staggered space |
| CN110566210B (en) * | 2019-09-04 | 2020-10-16 | 北京中煤矿山工程有限公司 | Horizontal freezer and freezing method for segmented time-staggered space |
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